Merge pull request #1 from microsoft/yguo/add-initial-files

Create initial contents for new onnxruntime-swift-package-manager repo

.gitignore

@@ -396,3 +396,8 @@ FodyWeavers.xsd
 
 # JetBrains Rider
 *.sln.iml
+
+.DS_Store
+*.DS_Store
+
+.build/

.pipelines/mac-ios-spm-dev-validation-pipeline.yml

@@ -0,0 +1,72 @@
+  jobs:
+  - job: j
+    displayName: "Test with latest local ORT native pod"
+
+    pool:
+      vmImage: "macOS-13"
+
+    variables:
+      xcodeVersion: "14.3"
+      artifactsName: "ios_packaging_artifacts_full"
+
+    timeoutInMinutes: 60
+
+    steps:
+    - template: templates/use-xcode-version.yml
+      parameters:
+        xcodeVersion: ${{ variables.xcodeVersion }}
+
+    - script: |
+        mkdir tmp
+        cd tmp
+        git clone -n --depth=1 --filter=tree:0 https://github.com/microsoft/onnxruntime.git
+        cd onnxruntime
+        git sparse-checkout set --no-cone objectivec swift Package.swift
+        git checkout
+      workingDirectory: "$(Build.SourcesDirectory)"
+      displayName: "Sparse checkout objectivec/ swift/ folders from latest ORT main repository"
+    
+    - script: |
+        ls -R  "$(Build.SourcesDirectory)/tmp/onnxruntime"
+      workingDirectory: "$(Build.SourcesDirectory)/tmp"
+      displayName: "List sparse checkout repo contents"
+    
+    # Download artifacts from a specific pipeline 
+    # For now, it consumes rel-1.15.0 version ORT iOS Pod which matches the current source code
+    # TODO: Update branch to latest main of ORT github repo when syncing changes to ORT SPM repo here.
+    - task: DownloadPipelineArtifact@2
+      inputs:
+        buildType: 'specific'
+        project: 'Lotus'
+        definition: 995          #'definitionid' is obtained from `System.DefinitionId` of ORT CI: onnxruntime-ios-packaging-pipeline
+        buildVersionToDownload: 'latest'
+        branchName: 'main'
+        targetPath: '$(Build.ArtifactStagingDirectory)'
+
+    - script: |
+        set -e -x
+        ls
+      workingDirectory: '$(Build.ArtifactStagingDirectory)/$(artifactsName)'
+      displayName: "List staged artifacts"
+
+    # copy the pod archive to a path relative to Package.swift and set the env var required by Package.swift to use that.
+    # xcodebuild will implicitly use Package.swift and build/run the .testTarget (tests in swift/onnxTests).
+    # once that's done cleanup the copy of the pod zip file
+    - script: |
+        set -e -x
+        cd "$(Build.ArtifactStagingDirectory)/$(artifactsName)"
+        POD_ARCHIVE=$(find . -name "pod-archive-onnxruntime-c*.zip")
+
+        shasum -a 256 "$(Build.ArtifactStagingDirectory)/$(artifactsName)/${POD_ARCHIVE}"
+        
+        cd "$(Build.SourcesDirectory)/tmp/onnxruntime"
+        cp "$(Build.ArtifactStagingDirectory)/$(artifactsName)/${POD_ARCHIVE}" swift/
+        export ORT_IOS_POD_LOCAL_PATH="swift/${POD_ARCHIVE}"
+        xcodebuild test -scheme onnxruntime -destination 'platform=iOS Simulator,name=iPhone 14'
+        rm swift/pod-archive-onnxruntime-c-*.zip
+      workingDirectory: "$(Build.SourcesDirectory)/tmp"
+      displayName: "Print ORT iOS Pod checksum and Test Package.swift usage"
+
+    - template: templates/component-governance-component-detection-steps.yml
+      parameters :
+        condition : 'succeeded'

.pipelines/mac-ios-spm-release-validation-pipeline.yml

@@ -0,0 +1,26 @@
+  jobs:
+  - job: j
+    displayName: "Test with released ORT native pod"
+
+    pool:
+      vmImage: "macOS-13"
+
+    variables:
+      xcodeVersion: "14.3"
+
+    timeoutInMinutes: 60
+
+    steps:
+    - template: templates/use-xcode-version.yml
+      parameters:
+        xcodeVersion: ${{ variables.xcodeVersion }}
+
+    - script: |
+        set -e -x
+        xcodebuild test -scheme onnxruntime -destination 'platform=iOS Simulator,name=iPhone 14'
+      workingDirectory: "$(Build.SourcesDirectory)"
+      displayName: "Test Package.swift usage"
+
+    - template: templates/component-governance-component-detection-steps.yml
+      parameters :
+        condition : 'succeeded'

.pipelines/templates/component-governance-component-detection-steps.yml

@@ -0,0 +1,14 @@
+# component detection for component governance checks
+parameters:
+- name: condition
+  type: string
+  default: 'succeeded' # could be 'ci_only', 'always', 'succeeded'
+
+steps:
+- ${{ if eq(variables['System.TeamProject'], 'Lotus') }}: 
+  - task: ms.vss-governance-buildtask.governance-build-task-component-detection.ComponentGovernanceComponentDetection@0
+    displayName: 'Component Detection'
+    condition:
+      or(or(and(eq('${{parameters.condition}}', 'ci_only'), and(succeeded(), in(variables['Build.Reason'], 'IndividualCI', 'BatchedCI', 'Scheduled'))),
+          and(eq('${{parameters.condition}}', 'always'), always())),
+          and(eq('${{parameters.condition}}', 'succeeded'), succeeded()))

.pipelines/templates/use-xcode-version.yml

@@ -0,0 +1,14 @@
+# Specify use of a specific Xcode version.
+
+parameters:
+- name: xcodeVersion
+  type: string
+  default: "14.3"
+
+steps:
+- bash: |
+    set -e -x
+    XCODE_DEVELOPER_DIR="/Applications/Xcode_${{ parameters.xcodeVersion }}.app/Contents/Developer"
+    sudo xcode-select --switch "${XCODE_DEVELOPER_DIR}"
+
+  displayName: Use Xcode ${{ parameters.xcodeVersion }}

Package.swift

@@ -0,0 +1,86 @@
+// swift-tools-version: 5.6
+//   The swift-tools-version declares the minimum version of Swift required to build this package and MUST be the first
+//   line of this file. 5.6 is required to support zip files for the pod archive binaryTarget.
+//
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+//
+// A user of the Swift Package Manager (SPM) package will consume this file directly from the ORT github repository.
+// For context, the end user's config will look something like:
+//
+//     dependencies: [
+//        #TODO: update to use release 'version' and the new repo url here when available
+//       .package(url: "https://github.com/microsoft/onnxruntime", branch: "rel-1.15.0"), 
+//       ...
+//     ],
+//
+
+import PackageDescription
+import class Foundation.ProcessInfo
+
+let package = Package(
+    name: "onnxruntime",
+    platforms: [.iOS(.v11)],
+    products: [
+        .library(name: "onnxruntime",
+                 type: .static,
+                 targets: ["OnnxRuntimeBindings"]),
+    ],
+    dependencies: [],
+    targets: [
+        .target(name: "OnnxRuntimeBindings",
+                dependencies: ["onnxruntime"],
+                path: "objectivec",
+                exclude: ["ReadMe.md", "format_objc.sh"],
+                cxxSettings: [
+                    .define("SPM_BUILD"),
+                    .unsafeFlags(["-std=c++17",
+                                  "-fobjc-arc-exceptions"
+                                 ]),
+                ], linkerSettings: [
+                    .unsafeFlags(["-ObjC"]),
+                ]),
+        .testTarget(name: "OnnxRuntimeBindingsTests",
+                    dependencies: ["OnnxRuntimeBindings"],
+                    path: "swift/OnnxRuntimeBindingsTests",
+                    resources: [
+                        .copy("Resources/single_add.basic.ort")
+                    ]),
+    ]
+)
+
+// Add the ORT iOS Pod archive as a binary target.
+//
+// There are 2 scenarios:
+//
+// Release version of ORT SPM github repo:
+//    Target will be set to the latest released ORT iOS pod archive and its checksum.
+//
+// Current main of ORT SPM github repo:
+//    Target will be set to the pod archive built in sync with the current main objective-c source code.
+
+// CI or local testing where you have built/obtained the iOS Pod archive matching the current source code.
+// Requires the ORT_IOS_POD_LOCAL_PATH environment variable to be set to specify the location of the pod.
+if let pod_archive_path = ProcessInfo.processInfo.environment["ORT_IOS_POD_LOCAL_PATH"] {
+    // ORT_IOS_POD_LOCAL_PATH MUST be a path that is relative to Package.swift.
+    //
+    // To build locally, tools/ci_build/github/apple/build_and_assemble_ios_pods.py can be used
+    // See https://onnxruntime.ai/docs/build/custom.html#ios
+    //  Example command:
+    //    python3 tools/ci_build/github/apple/build_and_assemble_ios_pods.py \
+    //      --variant Full \
+    //      --build-settings-file tools/ci_build/github/apple/default_full_ios_framework_build_settings.json
+    //
+    // This should produce the pod archive in build/ios_pod_staging, and ORT_IOS_POD_LOCAL_PATH can be set to
+    // "build/ios_pod_staging/pod-archive-onnxruntime-c-???.zip" where '???' is replaced by the version info in the
+    // actual filename.
+    package.targets.append(Target.binaryTarget(name: "onnxruntime", path: pod_archive_path))
+
+} else {
+    // ORT 1.15.0 release
+    package.targets.append(
+       Target.binaryTarget(name: "onnxruntime",
+                           url: "https://onnxruntimepackages.z14.web.core.windows.net/pod-archive-onnxruntime-c-1.15.0.zip",
+                           checksum: "9b41412329a73d7d298b1d94ab40ae9adb65cb84f132054073bc82515b4f5f82")
+    )
+}

README.md

@@ -1,14 +1,13 @@
-# Project
+# Swift Package Manager for ONNX Runtime
 
-> This repo has been populated by an initial template to help get you started. Please
+A light-weight repository for providing [Swift Package Manager (SPM)](https://www.swift.org/package-manager/) support for [ONNXRuntime](https://github.com/microsoft/onnxruntime). The ONNX Runtime native package is included as a binary dependency of the SPM package.
-> make sure to update the content to build a great experience for community-building.
 
-As the maintainer of this project, please make a few updates:
 
-- Improving this README.MD file to provide a great experience
+SPM is the alternative to CocoaPods when desired platform to consume is mobile iOS.
-- Updating SUPPORT.MD with content about this project's support experience
+
-- Understanding the security reporting process in SECURITY.MD
+## Note
-- Remove this section from the README
+
+The `objectivec/` and `swift/` directories are copied from ORT repo and it's expected to match. It will be updated periodically/before release to merge the newly checked-in changes for objective-c/swift on ORT main repo.
 
 ## Contributing
 

objectivec/ReadMe.md

@@ -0,0 +1,2 @@
+NOTE: Flat directory structure to work with both the Objective-C build and the Swift Package Manager build which is done
+via ../Package.swift

objectivec/assert_arc_enabled.mm

@@ -0,0 +1,4 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+static_assert(__has_feature(objc_arc), "Objective-C ARC must be enabled.");

objectivec/cxx_api.h

@@ -0,0 +1,41 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// wrapper for ORT C/C++ API headers
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+// ignore clang documentation-related warnings
+// instead, we will rely on Doxygen warnings for the C/C++ API headers
+#pragma clang diagnostic ignored "-Wdocumentation"
+#endif  // defined(__clang__)
+
+// paths are different when building the Swift Package Manager package as the headers come from the iOS pod archive
+#ifdef SPM_BUILD
+#include "onnxruntime/onnxruntime_c_api.h"
+#include "onnxruntime/onnxruntime_cxx_api.h"
+
+#if __has_include("onnxruntime/coreml_provider_factory.h")
+#define ORT_OBJC_API_COREML_EP_AVAILABLE 1
+#include "onnxruntime/coreml_provider_factory.h"
+#else
+#define ORT_OBJC_API_COREML_EP_AVAILABLE 0
+#endif
+
+#else
+#include "onnxruntime_c_api.h"
+#include "onnxruntime_cxx_api.h"
+
+#if __has_include("coreml_provider_factory.h")
+#define ORT_OBJC_API_COREML_EP_AVAILABLE 1
+#include "coreml_provider_factory.h"
+#else
+#define ORT_OBJC_API_COREML_EP_AVAILABLE 0
+
+#endif
+
+#endif
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif  // defined(__clang__)

objectivec/error_utils.h

@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#include <exception>
+
+#import "cxx_api.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+void ORTSaveCodeAndDescriptionToError(int code, const char* description, NSError** error);
+void ORTSaveOrtExceptionToError(const Ort::Exception& e, NSError** error);
+void ORTSaveExceptionToError(const std::exception& e, NSError** error);
+
+// helper macros to catch and handle C++ exceptions
+#define ORT_OBJC_API_IMPL_CATCH(error, failure_return_value) \
+  catch (const Ort::Exception& e) {                          \
+    ORTSaveOrtExceptionToError(e, (error));                  \
+    return (failure_return_value);                           \
+  }                                                          \
+  catch (const std::exception& e) {                          \
+    ORTSaveExceptionToError(e, (error));                     \
+    return (failure_return_value);                           \
+  }
+
+#define ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error) \
+  ORT_OBJC_API_IMPL_CATCH(error, NO)
+
+#define ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error) \
+  ORT_OBJC_API_IMPL_CATCH(error, nil)
+
+NS_ASSUME_NONNULL_END

objectivec/error_utils.mm

@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "error_utils.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+static NSString* const kOrtErrorDomain = @"onnxruntime";
+
+void ORTSaveCodeAndDescriptionToError(int code, const char* descriptionCstr, NSError** error) {
+  if (!error) return;
+
+  NSString* description = [NSString stringWithCString:descriptionCstr
+                                             encoding:NSASCIIStringEncoding];
+
+  *error = [NSError errorWithDomain:kOrtErrorDomain
+                               code:code
+                           userInfo:@{NSLocalizedDescriptionKey : description}];
+}
+
+void ORTSaveOrtExceptionToError(const Ort::Exception& e, NSError** error) {
+  ORTSaveCodeAndDescriptionToError(e.GetOrtErrorCode(), e.what(), error);
+}
+
+void ORTSaveExceptionToError(const std::exception& e, NSError** error) {
+  ORTSaveCodeAndDescriptionToError(ORT_RUNTIME_EXCEPTION, e.what(), error);
+}
+
+NS_ASSUME_NONNULL_END

objectivec/format_objc.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# formats Objective-C/C++ code
+
+set -e
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+clang-format -i $(find ${SCRIPT_DIR} -name "*.h" -o -name "*.m" -o -name "*.mm")

objectivec/include/onnxruntime.h

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+// this header contains the entire ONNX Runtime Objective-C API
+// the headers below can also be imported individually
+
+#import "ort_coreml_execution_provider.h"
+#import "ort_xnnpack_execution_provider.h"
+#import "ort_enums.h"
+#import "ort_env.h"
+#import "ort_session.h"
+#import "ort_value.h"

objectivec/include/ort_coreml_execution_provider.h

@@ -0,0 +1,62 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#import "ort_session.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Gets whether the CoreML execution provider is available.
+ */
+BOOL ORTIsCoreMLExecutionProviderAvailable(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Options for configuring the CoreML execution provider.
+ */
+@interface ORTCoreMLExecutionProviderOptions : NSObject
+
+/**
+ * Whether the CoreML execution provider should run on CPU only.
+ */
+@property BOOL useCPUOnly;
+
+/**
+ * Whether the CoreML execution provider is enabled on subgraphs.
+ */
+@property BOOL enableOnSubgraphs;
+
+/**
+ * Whether the CoreML execution provider is only enabled for devices with Apple
+ * Neural Engine (ANE).
+ */
+@property BOOL onlyEnableForDevicesWithANE;
+
+@end
+
+@interface ORTSessionOptions (ORTSessionOptionsCoreMLEP)
+
+/**
+ * Enables the CoreML execution provider in the session configuration options.
+ * It is appended to the execution provider list which is ordered by
+ * decreasing priority.
+ *
+ * @param options The CoreML execution provider configuration options.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the provider was enabled successfully.
+ */
+- (BOOL)appendCoreMLExecutionProviderWithOptions:(ORTCoreMLExecutionProviderOptions*)options
+                                           error:(NSError**)error;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/include/ort_enums.h

@@ -0,0 +1,55 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * The ORT logging verbosity levels.
+ */
+typedef NS_ENUM(int32_t, ORTLoggingLevel) {
+  ORTLoggingLevelVerbose,
+  ORTLoggingLevelInfo,
+  ORTLoggingLevelWarning,
+  ORTLoggingLevelError,
+  ORTLoggingLevelFatal,
+};
+
+/**
+ * The ORT value types.
+ * Currently, a subset of all types is supported.
+ */
+typedef NS_ENUM(int32_t, ORTValueType) {
+  ORTValueTypeUnknown,
+  ORTValueTypeTensor,
+};
+
+/**
+ * The ORT tensor element data types.
+ * Currently, a subset of all types is supported.
+ */
+typedef NS_ENUM(int32_t, ORTTensorElementDataType) {
+  ORTTensorElementDataTypeUndefined,
+  ORTTensorElementDataTypeFloat,
+  ORTTensorElementDataTypeInt8,
+  ORTTensorElementDataTypeUInt8,
+  ORTTensorElementDataTypeInt32,
+  ORTTensorElementDataTypeUInt32,
+  ORTTensorElementDataTypeInt64,
+  ORTTensorElementDataTypeUInt64,
+};
+
+/**
+ * The ORT graph optimization levels.
+ * See here for more details:
+ * https://onnxruntime.ai/docs/performance/graph-optimizations.html
+ */
+typedef NS_ENUM(int32_t, ORTGraphOptimizationLevel) {
+  ORTGraphOptimizationLevelNone,
+  ORTGraphOptimizationLevelBasic,
+  ORTGraphOptimizationLevelExtended,
+  ORTGraphOptimizationLevelAll,
+};
+
+NS_ASSUME_NONNULL_END

objectivec/include/ort_env.h

@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#import "ort_enums.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Gets the ORT version string in format major.minor.patch.
+ *
+ * Available since 1.15.
+ */
+NSString* ORTVersion(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+/**
+ * The ORT environment.
+ */
+@interface ORTEnv : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates an ORT Environment.
+ *
+ * @param loggingLevel The environment logging level.
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithLoggingLevel:(ORTLoggingLevel)loggingLevel
+                                        error:(NSError**)error NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/include/ort_session.h

@@ -0,0 +1,266 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#import "ort_enums.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ORTEnv;
+@class ORTRunOptions;
+@class ORTSessionOptions;
+@class ORTValue;
+
+/**
+ * An ORT session loads and runs a model.
+ */
+@interface ORTSession : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates a session.
+ *
+ * @param env The ORT Environment instance.
+ * @param path The path to the ONNX model.
+ * @param sessionOptions Optional session configuration options.
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithEnv:(ORTEnv*)env
+                           modelPath:(NSString*)path
+                      sessionOptions:(nullable ORTSessionOptions*)sessionOptions
+                               error:(NSError**)error NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Runs the model.
+ * The inputs and outputs are pre-allocated.
+ *
+ * @param inputs Dictionary of input names to input ORT values.
+ * @param outputs Dictionary of output names to output ORT values.
+ * @param runOptions Optional run configuration options.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the model was run successfully.
+ */
+- (BOOL)runWithInputs:(NSDictionary<NSString*, ORTValue*>*)inputs
+              outputs:(NSDictionary<NSString*, ORTValue*>*)outputs
+           runOptions:(nullable ORTRunOptions*)runOptions
+                error:(NSError**)error;
+
+/**
+ * Runs the model.
+ * The inputs are pre-allocated and the outputs are allocated by ORT.
+ *
+ * @param inputs Dictionary of input names to input ORT values.
+ * @param outputNames Set of output names.
+ * @param runOptions Optional run configuration options.
+ * @param error Optional error information set if an error occurs.
+ * @return A dictionary of output names to output ORT values with the outputs
+ *         requested in `outputNames`, or nil if an error occurs.
+ */
+- (nullable NSDictionary<NSString*, ORTValue*>*)runWithInputs:(NSDictionary<NSString*, ORTValue*>*)inputs
+                                                  outputNames:(NSSet<NSString*>*)outputNames
+                                                   runOptions:(nullable ORTRunOptions*)runOptions
+                                                        error:(NSError**)error;
+
+/**
+ * Gets the model's input names.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return An array of input names, or nil if an error occurs.
+ */
+- (nullable NSArray<NSString*>*)inputNamesWithError:(NSError**)error;
+
+/**
+ * Gets the model's overridable initializer names.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return An array of overridable initializer names, or nil if an error occurs.
+ */
+- (nullable NSArray<NSString*>*)overridableInitializerNamesWithError:(NSError**)error;
+
+/**
+ * Gets the model's output names.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return An array of output names, or nil if an error occurs.
+ */
+- (nullable NSArray<NSString*>*)outputNamesWithError:(NSError**)error;
+
+@end
+
+/**
+ * Options for configuring a session.
+ */
+@interface ORTSessionOptions : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates session configuration options.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithError:(NSError**)error NS_SWIFT_NAME(init());
+
+/**
+ * Appends an execution provider to the session options to enable the execution provider to be used when running
+ * the model.
+ *
+ * Available since 1.14.
+ *
+ * The execution provider list is ordered by decreasing priority.
+ * i.e. the first provider registered has the highest priority.
+ *
+ * @param providerName Provider name. For example, "xnnpack".
+ * @param providerOptions Provider-specific options. For example, for provider "xnnpack", {"intra_op_num_threads": "2"}.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the execution provider was appended successfully
+ */
+- (BOOL)appendExecutionProvider:(NSString*)providerName
+                providerOptions:(NSDictionary<NSString*, NSString*>*)providerOptions
+                          error:(NSError**)error;
+/**
+ * Sets the number of threads used to parallelize the execution within nodes.
+ * A value of 0 means ORT will pick a default value.
+ *
+ * @param intraOpNumThreads The number of threads.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setIntraOpNumThreads:(int)intraOpNumThreads
+                       error:(NSError**)error;
+
+/**
+ * Sets the graph optimization level.
+ *
+ * @param graphOptimizationLevel The graph optimization level.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setGraphOptimizationLevel:(ORTGraphOptimizationLevel)graphOptimizationLevel
+                            error:(NSError**)error;
+
+/**
+ * Sets the path to which the optimized model file will be saved.
+ *
+ * @param optimizedModelFilePath The optimized model file path.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setOptimizedModelFilePath:(NSString*)optimizedModelFilePath
+                            error:(NSError**)error;
+
+/**
+ * Sets the session log ID.
+ *
+ * @param logID The log ID.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setLogID:(NSString*)logID
+           error:(NSError**)error;
+
+/**
+ * Sets the session log severity level.
+ *
+ * @param loggingLevel The log severity level.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setLogSeverityLevel:(ORTLoggingLevel)loggingLevel
+                      error:(NSError**)error;
+
+/**
+ * Sets a session configuration key-value pair.
+ * Any value for a previously set key will be overwritten.
+ * The session configuration keys and values are documented here:
+ * https://github.com/microsoft/onnxruntime/blob/main/include/onnxruntime/core/session/onnxruntime_session_options_config_keys.h
+ *
+ * @param key The key.
+ * @param value The value.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)addConfigEntryWithKey:(NSString*)key
+                        value:(NSString*)value
+                        error:(NSError**)error;
+
+/**
+ * Registers custom ops for use with `ORTSession`s using this SessionOptions by calling the specified
+ * native function name. The custom ops library must either be linked against, or have previously been loaded
+ * by the user.
+ *
+ * Available since 1.14.
+ *
+ * The registration function must have the signature:
+ *    OrtStatus* (*fn)(OrtSessionOptions* options, const OrtApiBase* api);
+ *
+ * See https://onnxruntime.ai/docs/reference/operators/add-custom-op.html for more information on custom ops.
+ * See https://github.com/microsoft/onnxruntime/blob/342a5bf2b756d1a1fc6fdc582cfeac15182632fe/onnxruntime/test/testdata/custom_op_library/custom_op_library.cc#L115
+ * for an example of a custom op library registration function.
+ *
+ * @param registrationFuncName The name of the registration function to call.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the registration function was successfully called.
+ */
+- (BOOL)registerCustomOpsUsingFunction:(NSString*)registrationFuncName
+                                 error:(NSError**)error;
+
+@end
+
+/**
+ * Options for configuring a run.
+ */
+@interface ORTRunOptions : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates run configuration options.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithError:(NSError**)error NS_SWIFT_NAME(init());
+
+/**
+ * Sets the run log tag.
+ *
+ * @param logTag The log tag.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setLogTag:(NSString*)logTag
+            error:(NSError**)error;
+
+/**
+ * Sets the run log severity level.
+ *
+ * @param loggingLevel The log severity level.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)setLogSeverityLevel:(ORTLoggingLevel)loggingLevel
+                      error:(NSError**)error;
+
+/**
+ * Sets a run configuration key-value pair.
+ * Any value for a previously set key will be overwritten.
+ * The run configuration keys and values are documented here:
+ * https://github.com/microsoft/onnxruntime/blob/main/include/onnxruntime/core/session/onnxruntime_run_options_config_keys.h
+ *
+ * @param key The key.
+ * @param value The value.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the option was set successfully.
+ */
+- (BOOL)addConfigEntryWithKey:(NSString*)key
+                        value:(NSString*)value
+                        error:(NSError**)error;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/include/ort_value.h

@@ -0,0 +1,94 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#import "ort_enums.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ORTValueTypeInfo;
+@class ORTTensorTypeAndShapeInfo;
+
+/**
+ * An ORT value encapsulates data used as an input or output to a model at runtime.
+ */
+@interface ORTValue : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Creates a value that is a tensor.
+ * The tensor data is allocated by the caller.
+ *
+ * @param tensorData The tensor data.
+ * @param elementType The tensor element data type.
+ * @param shape The tensor shape.
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithTensorData:(NSMutableData*)tensorData
+                                elementType:(ORTTensorElementDataType)elementType
+                                      shape:(NSArray<NSNumber*>*)shape
+                                      error:(NSError**)error;
+
+/**
+ * Gets the type information.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return The type information, or nil if an error occurs.
+ */
+- (nullable ORTValueTypeInfo*)typeInfoWithError:(NSError**)error;
+
+/**
+ * Gets the tensor type and shape information.
+ * This assumes that the value is a tensor.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return The tensor type and shape information, or nil if an error occurs.
+ */
+- (nullable ORTTensorTypeAndShapeInfo*)tensorTypeAndShapeInfoWithError:(NSError**)error;
+
+/**
+ * Gets the tensor data.
+ * This assumes that the value is a tensor.
+ *
+ * This returns the value's underlying data directly, not a copy of it.
+ * The memory's lifetime may be tied to this value, i.e., if it was allocated
+ * by ORT. On the other hand, the memory's lifetime is independent of the value
+ * if the value was created with user-provided data.
+ *
+ * @param error Optional error information set if an error occurs.
+ * @return The tensor data, or nil if an error occurs.
+ */
+- (nullable NSMutableData*)tensorDataWithError:(NSError**)error;
+
+@end
+
+/**
+ * A value's type information.
+ */
+@interface ORTValueTypeInfo : NSObject
+
+/** The value type. */
+@property(nonatomic) ORTValueType type;
+
+/** The tensor type and shape information, if the value is a tensor. */
+@property(nonatomic, nullable) ORTTensorTypeAndShapeInfo* tensorTypeAndShapeInfo;
+
+@end
+
+/**
+ * A tensor's type and shape information.
+ */
+@interface ORTTensorTypeAndShapeInfo : NSObject
+
+/** The tensor element data type. */
+@property(nonatomic) ORTTensorElementDataType elementType;
+
+/** The tensor shape. */
+@property(nonatomic) NSArray<NSNumber*>* shape;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/include/ort_xnnpack_execution_provider.h

@@ -0,0 +1,39 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import <Foundation/Foundation.h>
+
+#import "ort_session.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Options for configuring the Xnnpack execution provider.
+ */
+@interface ORTXnnpackExecutionProviderOptions : NSObject
+
+/**
+ * How many threads used for the Xnnpack execution provider.
+ */
+@property int intra_op_num_threads;
+
+@end
+
+@interface ORTSessionOptions (ORTSessionOptionsXnnpackEP)
+
+/**
+ * Available since 1.14.
+ * Enables the Xnnpack execution provider in the session configuration options.
+ * It is appended to the execution provider list which is ordered by
+ * decreasing priority.
+ *
+ * @param options The Xnnpack execution provider configuration options.
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the provider was enabled successfully.
+ */
+- (BOOL)appendXnnpackExecutionProviderWithOptions:(ORTXnnpackExecutionProviderOptions*)options
+                                            error:(NSError**)error;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_coreml_execution_provider.mm

@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_coreml_execution_provider.h"
+
+#import "cxx_api.h"
+#import "error_utils.h"
+#import "ort_session_internal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+BOOL ORTIsCoreMLExecutionProviderAvailable() {
+  return ORT_OBJC_API_COREML_EP_AVAILABLE ? YES : NO;
+}
+
+@implementation ORTCoreMLExecutionProviderOptions
+
+@end
+
+@implementation ORTSessionOptions (ORTSessionOptionsCoreMLEP)
+
+- (BOOL)appendCoreMLExecutionProviderWithOptions:(ORTCoreMLExecutionProviderOptions*)options
+                                           error:(NSError**)error {
+#if ORT_OBJC_API_COREML_EP_AVAILABLE
+  try {
+    const uint32_t flags =
+        (options.useCPUOnly ? COREML_FLAG_USE_CPU_ONLY : 0) |
+        (options.enableOnSubgraphs ? COREML_FLAG_ENABLE_ON_SUBGRAPH : 0) |
+        (options.onlyEnableForDevicesWithANE ? COREML_FLAG_ONLY_ENABLE_DEVICE_WITH_ANE : 0);
+    Ort::ThrowOnError(OrtSessionOptionsAppendExecutionProvider_CoreML(
+        [self CXXAPIOrtSessionOptions], flags));
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error);
+#else  // !ORT_OBJC_API_COREML_EP_AVAILABLE
+  static_cast<void>(options);
+  ORTSaveCodeAndDescriptionToError(ORT_FAIL, "CoreML execution provider is not enabled.", error);
+  return NO;
+#endif
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_enums.mm

@@ -0,0 +1,133 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_enums_internal.h"
+
+#include <algorithm>
+
+#import "cxx_api.h"
+
+namespace {
+
+struct LoggingLevelInfo {
+  ORTLoggingLevel logging_level;
+  OrtLoggingLevel capi_logging_level;
+};
+
+// supported ORT logging levels
+// define the mapping from ORTLoggingLevel to C API OrtLoggingLevel here
+constexpr LoggingLevelInfo kLoggingLevelInfos[]{
+    {ORTLoggingLevelVerbose, ORT_LOGGING_LEVEL_VERBOSE},
+    {ORTLoggingLevelInfo, ORT_LOGGING_LEVEL_INFO},
+    {ORTLoggingLevelWarning, ORT_LOGGING_LEVEL_WARNING},
+    {ORTLoggingLevelError, ORT_LOGGING_LEVEL_ERROR},
+    {ORTLoggingLevelFatal, ORT_LOGGING_LEVEL_FATAL},
+};
+
+struct ValueTypeInfo {
+  ORTValueType type;
+  ONNXType capi_type;
+};
+
+// supported ORT value types
+// define the mapping from ORTValueType to C API ONNXType here
+constexpr ValueTypeInfo kValueTypeInfos[]{
+    {ORTValueTypeUnknown, ONNX_TYPE_UNKNOWN},
+    {ORTValueTypeTensor, ONNX_TYPE_TENSOR},
+};
+
+struct TensorElementTypeInfo {
+  ORTTensorElementDataType type;
+  ONNXTensorElementDataType capi_type;
+  size_t element_size;
+};
+
+// supported ORT tensor element data types
+// define the mapping from ORTTensorElementDataType to C API ONNXTensorElementDataType here
+constexpr TensorElementTypeInfo kElementTypeInfos[]{
+    {ORTTensorElementDataTypeUndefined, ONNX_TENSOR_ELEMENT_DATA_TYPE_UNDEFINED, 0},
+    {ORTTensorElementDataTypeFloat, ONNX_TENSOR_ELEMENT_DATA_TYPE_FLOAT, sizeof(float)},
+    {ORTTensorElementDataTypeInt8, ONNX_TENSOR_ELEMENT_DATA_TYPE_INT8, sizeof(int8_t)},
+    {ORTTensorElementDataTypeUInt8, ONNX_TENSOR_ELEMENT_DATA_TYPE_UINT8, sizeof(uint8_t)},
+    {ORTTensorElementDataTypeInt32, ONNX_TENSOR_ELEMENT_DATA_TYPE_INT32, sizeof(int32_t)},
+    {ORTTensorElementDataTypeUInt32, ONNX_TENSOR_ELEMENT_DATA_TYPE_UINT32, sizeof(uint32_t)},
+    {ORTTensorElementDataTypeInt64, ONNX_TENSOR_ELEMENT_DATA_TYPE_INT64, sizeof(int64_t)},
+    {ORTTensorElementDataTypeUInt64, ONNX_TENSOR_ELEMENT_DATA_TYPE_UINT64, sizeof(uint64_t)},
+};
+
+struct GraphOptimizationLevelInfo {
+  ORTGraphOptimizationLevel opt_level;
+  GraphOptimizationLevel capi_opt_level;
+};
+
+// ORT graph optimization levels
+// define the mapping from ORTGraphOptimizationLevel to C API GraphOptimizationLevel here
+constexpr GraphOptimizationLevelInfo kGraphOptimizationLevelInfos[]{
+    {ORTGraphOptimizationLevelNone, ORT_DISABLE_ALL},
+    {ORTGraphOptimizationLevelBasic, ORT_ENABLE_BASIC},
+    {ORTGraphOptimizationLevelExtended, ORT_ENABLE_EXTENDED},
+    {ORTGraphOptimizationLevelAll, ORT_ENABLE_ALL},
+};
+
+template <typename Container, typename SelectFn, typename TransformFn>
+auto SelectAndTransform(
+    const Container& container, SelectFn select_fn, TransformFn transform_fn,
+    const char* not_found_msg)
+    -> decltype(transform_fn(*std::begin(container))) {
+  const auto it = std::find_if(
+      std::begin(container), std::end(container), select_fn);
+  if (it == std::end(container)) {
+    ORT_CXX_API_THROW(not_found_msg, ORT_NOT_IMPLEMENTED);
+  }
+  return transform_fn(*it);
+}
+
+}  // namespace
+
+OrtLoggingLevel PublicToCAPILoggingLevel(ORTLoggingLevel logging_level) {
+  return SelectAndTransform(
+      kLoggingLevelInfos,
+      [logging_level](const auto& logging_level_info) { return logging_level_info.logging_level == logging_level; },
+      [](const auto& logging_level_info) { return logging_level_info.capi_logging_level; },
+      "unsupported logging level");
+}
+
+ORTValueType CAPIToPublicValueType(ONNXType capi_type) {
+  return SelectAndTransform(
+      kValueTypeInfos,
+      [capi_type](const auto& type_info) { return type_info.capi_type == capi_type; },
+      [](const auto& type_info) { return type_info.type; },
+      "unsupported value type");
+}
+
+ONNXTensorElementDataType PublicToCAPITensorElementType(ORTTensorElementDataType type) {
+  return SelectAndTransform(
+      kElementTypeInfos,
+      [type](const auto& type_info) { return type_info.type == type; },
+      [](const auto& type_info) { return type_info.capi_type; },
+      "unsupported tensor element type");
+}
+
+ORTTensorElementDataType CAPIToPublicTensorElementType(ONNXTensorElementDataType capi_type) {
+  return SelectAndTransform(
+      kElementTypeInfos,
+      [capi_type](const auto& type_info) { return type_info.capi_type == capi_type; },
+      [](const auto& type_info) { return type_info.type; },
+      "unsupported tensor element type");
+}
+
+size_t SizeOfCAPITensorElementType(ONNXTensorElementDataType capi_type) {
+  return SelectAndTransform(
+      kElementTypeInfos,
+      [capi_type](const auto& type_info) { return type_info.capi_type == capi_type; },
+      [](const auto& type_info) { return type_info.element_size; },
+      "unsupported tensor element type");
+}
+
+GraphOptimizationLevel PublicToCAPIGraphOptimizationLevel(ORTGraphOptimizationLevel opt_level) {
+  return SelectAndTransform(
+      kGraphOptimizationLevelInfos,
+      [opt_level](const auto& opt_level_info) { return opt_level_info.opt_level == opt_level; },
+      [](const auto& opt_level_info) { return opt_level_info.capi_opt_level; },
+      "unsupported graph optimization level");
+}

objectivec/ort_enums_internal.h

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_enums.h"
+
+#import "cxx_api.h"
+
+OrtLoggingLevel PublicToCAPILoggingLevel(ORTLoggingLevel logging_level);
+
+ORTValueType CAPIToPublicValueType(ONNXType capi_type);
+
+ONNXTensorElementDataType PublicToCAPITensorElementType(ORTTensorElementDataType type);
+ORTTensorElementDataType CAPIToPublicTensorElementType(ONNXTensorElementDataType capi_type);
+
+size_t SizeOfCAPITensorElementType(ONNXTensorElementDataType capi_type);
+
+GraphOptimizationLevel PublicToCAPIGraphOptimizationLevel(ORTGraphOptimizationLevel opt_level);

objectivec/ort_env.mm

@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_env_internal.h"
+
+#include <optional>
+
+#import "cxx_api.h"
+
+#import "error_utils.h"
+#import "ort_enums_internal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+NSString* ORTVersion(void) {
+  std::string result = OrtGetApiBase()->GetVersionString();
+  return [NSString stringWithUTF8String:result.c_str()];
+}
+
+@implementation ORTEnv {
+  std::optional<Ort::Env> _env;
+}
+
+- (nullable instancetype)initWithLoggingLevel:(ORTLoggingLevel)loggingLevel
+                                        error:(NSError**)error {
+  if ((self = [super init]) == nil) {
+    return nil;
+  }
+
+  try {
+    const auto CAPILoggingLevel = PublicToCAPILoggingLevel(loggingLevel);
+    _env = Ort::Env{CAPILoggingLevel};
+    return self;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (Ort::Env&)CXXAPIOrtEnv {
+  return *_env;
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_env_internal.h

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_env.h"
+
+#import "cxx_api.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORTEnv ()
+
+- (Ort::Env&)CXXAPIOrtEnv;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_session.mm

@@ -0,0 +1,361 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_session_internal.h"
+
+#include <optional>
+#include <vector>
+
+#import "cxx_api.h"
+#import "error_utils.h"
+#import "ort_enums_internal.h"
+#import "ort_env_internal.h"
+#import "ort_value_internal.h"
+
+namespace {
+enum class NamedValueType {
+  Input,
+  OverridableInitializer,
+  Output,
+};
+}  // namespace
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation ORTSession {
+  std::optional<Ort::Session> _session;
+}
+
+#pragma mark - Public
+
+- (nullable instancetype)initWithEnv:(ORTEnv*)env
+                           modelPath:(NSString*)path
+                      sessionOptions:(nullable ORTSessionOptions*)sessionOptions
+                               error:(NSError**)error {
+  if ((self = [super init]) == nil) {
+    return nil;
+  }
+
+  try {
+    if (!sessionOptions) {
+      sessionOptions = [[ORTSessionOptions alloc] initWithError:error];
+      if (!sessionOptions) {
+        return nil;
+      }
+    }
+
+    _session = Ort::Session{[env CXXAPIOrtEnv],
+                            path.UTF8String,
+                            [sessionOptions CXXAPIOrtSessionOptions]};
+
+    return self;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (BOOL)runWithInputs:(NSDictionary<NSString*, ORTValue*>*)inputs
+              outputs:(NSDictionary<NSString*, ORTValue*>*)outputs
+           runOptions:(nullable ORTRunOptions*)runOptions
+                error:(NSError**)error {
+  try {
+    if (!runOptions) {
+      runOptions = [[ORTRunOptions alloc] initWithError:error];
+      if (!runOptions) {
+        return NO;
+      }
+    }
+
+    std::vector<const char*> inputNames, outputNames;
+    std::vector<const OrtValue*> inputValues;
+    std::vector<OrtValue*> outputValues;
+
+    for (NSString* inputName in inputs) {
+      inputNames.push_back(inputName.UTF8String);
+      inputValues.push_back(static_cast<const OrtValue*>([inputs[inputName] CXXAPIOrtValue]));
+    }
+
+    for (NSString* outputName in outputs) {
+      outputNames.push_back(outputName.UTF8String);
+      outputValues.push_back(static_cast<OrtValue*>([outputs[outputName] CXXAPIOrtValue]));
+    }
+
+    Ort::ThrowOnError(Ort::GetApi().Run(*_session, [runOptions CXXAPIOrtRunOptions],
+                                        inputNames.data(), inputValues.data(), inputNames.size(),
+                                        outputNames.data(), outputNames.size(), outputValues.data()));
+
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (nullable NSDictionary<NSString*, ORTValue*>*)runWithInputs:(NSDictionary<NSString*, ORTValue*>*)inputs
+                                                  outputNames:(NSSet<NSString*>*)outputNameSet
+                                                   runOptions:(nullable ORTRunOptions*)runOptions
+                                                        error:(NSError**)error {
+  try {
+    if (!runOptions) {
+      runOptions = [[ORTRunOptions alloc] initWithError:error];
+      if (!runOptions) {
+        return nil;
+      }
+    }
+
+    NSArray<NSString*>* outputNameArray = outputNameSet.allObjects;
+
+    std::vector<const char*> inputNames, outputNames;
+    std::vector<const OrtValue*> inputValues;
+    std::vector<OrtValue*> outputValues;
+
+    for (NSString* inputName in inputs) {
+      inputNames.push_back(inputName.UTF8String);
+      inputValues.push_back(static_cast<const OrtValue*>([inputs[inputName] CXXAPIOrtValue]));
+    }
+
+    for (NSString* outputName in outputNameArray) {
+      outputNames.push_back(outputName.UTF8String);
+      outputValues.push_back(nullptr);
+    }
+
+    Ort::ThrowOnError(Ort::GetApi().Run(*_session, [runOptions CXXAPIOrtRunOptions],
+                                        inputNames.data(), inputValues.data(), inputNames.size(),
+                                        outputNames.data(), outputNames.size(), outputValues.data()));
+
+    NSMutableDictionary<NSString*, ORTValue*>* outputs = [[NSMutableDictionary alloc] init];
+    for (NSUInteger i = 0; i < outputNameArray.count; ++i) {
+      ORTValue* outputValue = [[ORTValue alloc] initWithCAPIOrtValue:outputValues[i] externalTensorData:nil error:error];
+      if (!outputValue) {
+        // clean up remaining C API OrtValues which haven't been wrapped by an ORTValue yet
+        for (NSUInteger j = i; j < outputNameArray.count; ++j) {
+          Ort::GetApi().ReleaseValue(outputValues[j]);
+        }
+        return nil;
+      }
+
+      outputs[outputNameArray[i]] = outputValue;
+    }
+
+    return outputs;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (nullable NSArray<NSString*>*)inputNamesWithError:(NSError**)error {
+  return [self namesWithType:NamedValueType::Input error:error];
+}
+
+- (nullable NSArray<NSString*>*)overridableInitializerNamesWithError:(NSError**)error {
+  return [self namesWithType:NamedValueType::OverridableInitializer error:error];
+}
+
+- (nullable NSArray<NSString*>*)outputNamesWithError:(NSError**)error {
+  return [self namesWithType:NamedValueType::Output error:error];
+}
+
+#pragma mark - Private
+
+- (nullable NSArray<NSString*>*)namesWithType:(NamedValueType)namedValueType
+                                        error:(NSError**)error {
+  try {
+    auto getCount = [&session = *_session, namedValueType]() {
+      if (namedValueType == NamedValueType::Input) {
+        return session.GetInputCount();
+      } else if (namedValueType == NamedValueType::OverridableInitializer) {
+        return session.GetOverridableInitializerCount();
+      } else {
+        return session.GetOutputCount();
+      }
+    };
+
+    auto getName = [&session = *_session, namedValueType](size_t i, OrtAllocator* allocator) {
+      if (namedValueType == NamedValueType::Input) {
+        return session.GetInputNameAllocated(i, allocator);
+      } else if (namedValueType == NamedValueType::OverridableInitializer) {
+        return session.GetOverridableInitializerNameAllocated(i, allocator);
+      } else {
+        return session.GetOutputNameAllocated(i, allocator);
+      }
+    };
+
+    const size_t nameCount = getCount();
+
+    Ort::AllocatorWithDefaultOptions allocator;
+    NSMutableArray<NSString*>* result = [NSMutableArray arrayWithCapacity:nameCount];
+
+    for (size_t i = 0; i < nameCount; ++i) {
+      auto name = getName(i, allocator);
+      NSString* nameNsstr = [NSString stringWithUTF8String:name.get()];
+      NSAssert(nameNsstr != nil, @"nameNsstr must not be nil");
+      [result addObject:nameNsstr];
+    }
+
+    return result;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+@end
+
+@implementation ORTSessionOptions {
+  std::optional<Ort::SessionOptions> _sessionOptions;
+}
+
+#pragma mark - Public
+
+- (nullable instancetype)initWithError:(NSError**)error {
+  if ((self = [super init]) == nil) {
+    return nil;
+  }
+
+  try {
+    _sessionOptions = Ort::SessionOptions{};
+    return self;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (BOOL)appendExecutionProvider:(NSString*)providerName
+                providerOptions:(NSDictionary<NSString*, NSString*>*)providerOptions
+                          error:(NSError**)error {
+  try {
+    std::unordered_map<std::string, std::string> options;
+    NSArray* keys = [providerOptions allKeys];
+
+    for (NSString* key in keys) {
+      NSString* value = [providerOptions objectForKey:key];
+      options.emplace(key.UTF8String, value.UTF8String);
+    }
+
+    _sessionOptions->AppendExecutionProvider(providerName.UTF8String, options);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error);
+}
+
+- (BOOL)setIntraOpNumThreads:(int)intraOpNumThreads
+                       error:(NSError**)error {
+  try {
+    _sessionOptions->SetIntraOpNumThreads(intraOpNumThreads);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)setGraphOptimizationLevel:(ORTGraphOptimizationLevel)graphOptimizationLevel
+                            error:(NSError**)error {
+  try {
+    _sessionOptions->SetGraphOptimizationLevel(
+        PublicToCAPIGraphOptimizationLevel(graphOptimizationLevel));
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)setOptimizedModelFilePath:(NSString*)optimizedModelFilePath
+                            error:(NSError**)error {
+  try {
+    _sessionOptions->SetOptimizedModelFilePath(optimizedModelFilePath.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)setLogID:(NSString*)logID
+           error:(NSError**)error {
+  try {
+    _sessionOptions->SetLogId(logID.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)setLogSeverityLevel:(ORTLoggingLevel)loggingLevel
+                      error:(NSError**)error {
+  try {
+    _sessionOptions->SetLogSeverityLevel(PublicToCAPILoggingLevel(loggingLevel));
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)addConfigEntryWithKey:(NSString*)key
+                        value:(NSString*)value
+                        error:(NSError**)error {
+  try {
+    _sessionOptions->AddConfigEntry(key.UTF8String, value.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)registerCustomOpsUsingFunction:(NSString*)registrationFuncName
+                                 error:(NSError**)error {
+  try {
+    _sessionOptions->RegisterCustomOpsUsingFunction(registrationFuncName.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+#pragma mark - Internal
+
+- (Ort::SessionOptions&)CXXAPIOrtSessionOptions {
+  return *_sessionOptions;
+}
+
+@end
+
+@implementation ORTRunOptions {
+  std::optional<Ort::RunOptions> _runOptions;
+}
+
+#pragma mark - Public
+
+- (nullable instancetype)initWithError:(NSError**)error {
+  if ((self = [super init]) == nil) {
+    return nil;
+  }
+
+  try {
+    _runOptions = Ort::RunOptions{};
+    return self;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (BOOL)setLogTag:(NSString*)logTag
+            error:(NSError**)error {
+  try {
+    _runOptions->SetRunTag(logTag.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)setLogSeverityLevel:(ORTLoggingLevel)loggingLevel
+                      error:(NSError**)error {
+  try {
+    _runOptions->SetRunLogSeverityLevel(PublicToCAPILoggingLevel(loggingLevel));
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+- (BOOL)addConfigEntryWithKey:(NSString*)key
+                        value:(NSString*)value
+                        error:(NSError**)error {
+  try {
+    _runOptions->AddConfigEntry(key.UTF8String, value.UTF8String);
+    return YES;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error)
+}
+
+#pragma mark - Internal
+
+- (Ort::RunOptions&)CXXAPIOrtRunOptions {
+  return *_runOptions;
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_session_internal.h

@@ -0,0 +1,22 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_session.h"
+
+#import "cxx_api.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORTSessionOptions ()
+
+- (Ort::SessionOptions&)CXXAPIOrtSessionOptions;
+
+@end
+
+@interface ORTRunOptions ()
+
+- (Ort::RunOptions&)CXXAPIOrtRunOptions;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_value.mm

@@ -0,0 +1,160 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_value_internal.h"
+
+#include <optional>
+
+#import "cxx_api.h"
+#import "error_utils.h"
+#import "ort_enums_internal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+namespace {
+
+ORTTensorTypeAndShapeInfo* CXXAPIToPublicTensorTypeAndShapeInfo(
+    const Ort::ConstTensorTypeAndShapeInfo& CXXAPITensorTypeAndShapeInfo) {
+  auto* result = [[ORTTensorTypeAndShapeInfo alloc] init];
+  const auto elementType = CXXAPITensorTypeAndShapeInfo.GetElementType();
+  const std::vector<int64_t> shape = CXXAPITensorTypeAndShapeInfo.GetShape();
+
+  result.elementType = CAPIToPublicTensorElementType(elementType);
+  auto* shapeArray = [[NSMutableArray alloc] initWithCapacity:shape.size()];
+  for (size_t i = 0; i < shape.size(); ++i) {
+    shapeArray[i] = @(shape[i]);
+  }
+  result.shape = shapeArray;
+
+  return result;
+}
+
+ORTValueTypeInfo* CXXAPIToPublicValueTypeInfo(
+    const Ort::TypeInfo& CXXAPITypeInfo) {
+  auto* result = [[ORTValueTypeInfo alloc] init];
+  const auto valueType = CXXAPITypeInfo.GetONNXType();
+
+  result.type = CAPIToPublicValueType(valueType);
+
+  if (valueType == ONNX_TYPE_TENSOR) {
+    const auto tensorTypeAndShapeInfo = CXXAPITypeInfo.GetTensorTypeAndShapeInfo();
+    result.tensorTypeAndShapeInfo = CXXAPIToPublicTensorTypeAndShapeInfo(tensorTypeAndShapeInfo);
+  }
+
+  return result;
+}
+
+// out = a * b
+// returns true iff the result does not overflow
+bool SafeMultiply(size_t a, size_t b, size_t& out) {
+  return !__builtin_mul_overflow(a, b, &out);
+}
+
+}  // namespace
+
+@interface ORTValue ()
+
+// pointer to any external tensor data to keep alive for the lifetime of the ORTValue
+@property(nonatomic, nullable) NSMutableData* externalTensorData;
+
+@end
+
+@implementation ORTValue {
+  std::optional<Ort::Value> _value;
+  std::optional<Ort::TypeInfo> _typeInfo;
+}
+
+#pragma mark - Public
+
+- (nullable instancetype)initWithTensorData:(NSMutableData*)tensorData
+                                elementType:(ORTTensorElementDataType)elementType
+                                      shape:(NSArray<NSNumber*>*)shape
+                                      error:(NSError**)error {
+  try {
+    const auto memoryInfo = Ort::MemoryInfo::CreateCpu(OrtDeviceAllocator, OrtMemTypeCPU);
+    const auto ONNXElementType = PublicToCAPITensorElementType(elementType);
+    const auto shapeVector = [shape]() {
+      std::vector<int64_t> result{};
+      result.reserve(shape.count);
+      for (NSNumber* dim in shape) {
+        result.push_back(dim.longLongValue);
+      }
+      return result;
+    }();
+    Ort::Value ortValue = Ort::Value::CreateTensor(
+        memoryInfo, tensorData.mutableBytes, tensorData.length,
+        shapeVector.data(), shapeVector.size(), ONNXElementType);
+
+    return [self initWithCAPIOrtValue:ortValue.release()
+                   externalTensorData:tensorData
+                                error:error];
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (nullable ORTValueTypeInfo*)typeInfoWithError:(NSError**)error {
+  try {
+    return CXXAPIToPublicValueTypeInfo(*_typeInfo);
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (nullable ORTTensorTypeAndShapeInfo*)tensorTypeAndShapeInfoWithError:(NSError**)error {
+  try {
+    const auto tensorTypeAndShapeInfo = _typeInfo->GetTensorTypeAndShapeInfo();
+    return CXXAPIToPublicTensorTypeAndShapeInfo(tensorTypeAndShapeInfo);
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+- (nullable NSMutableData*)tensorDataWithError:(NSError**)error {
+  try {
+    const auto tensorTypeAndShapeInfo = _typeInfo->GetTensorTypeAndShapeInfo();
+    const size_t elementCount = tensorTypeAndShapeInfo.GetElementCount();
+    const size_t elementSize = SizeOfCAPITensorElementType(tensorTypeAndShapeInfo.GetElementType());
+    size_t rawDataLength;
+    if (!SafeMultiply(elementCount, elementSize, rawDataLength)) {
+      ORT_CXX_API_THROW("failed to compute tensor data length", ORT_RUNTIME_EXCEPTION);
+    }
+
+    void* rawData;
+    Ort::ThrowOnError(Ort::GetApi().GetTensorMutableData(*_value, &rawData));
+
+    return [NSMutableData dataWithBytesNoCopy:rawData
+                                       length:rawDataLength
+                                 freeWhenDone:NO];
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error)
+}
+
+#pragma mark - Internal
+
+- (nullable instancetype)initWithCAPIOrtValue:(OrtValue*)CAPIOrtValue
+                           externalTensorData:(nullable NSMutableData*)externalTensorData
+                                        error:(NSError**)error {
+  if ((self = [super init]) == nil) {
+    return nil;
+  }
+
+  try {
+    _value = Ort::Value{CAPIOrtValue};
+    _typeInfo = _value->GetTypeInfo();
+    _externalTensorData = externalTensorData;
+    return self;
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_NULLABLE(error);
+}
+
+- (Ort::Value&)CXXAPIOrtValue {
+  return *_value;
+}
+
+@end
+
+@implementation ORTValueTypeInfo
+@end
+
+@implementation ORTTensorTypeAndShapeInfo
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_value_internal.h

@@ -0,0 +1,20 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_value.h"
+
+#import "cxx_api.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface ORTValue ()
+
+- (nullable instancetype)initWithCAPIOrtValue:(OrtValue*)CAPIOrtValue
+                           externalTensorData:(nullable NSMutableData*)externalTensorData
+                                        error:(NSError**)error NS_DESIGNATED_INITIALIZER;
+
+- (Ort::Value&)CXXAPIOrtValue;
+
+@end
+
+NS_ASSUME_NONNULL_END

objectivec/ort_xnnpack_execution_provider.mm

@@ -0,0 +1,31 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#import "ort_xnnpack_execution_provider.h"
+
+#import "cxx_api.h"
+#import "error_utils.h"
+#import "ort_session_internal.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation ORTXnnpackExecutionProviderOptions
+
+@end
+
+@implementation ORTSessionOptions (ORTSessionOptionsXnnpackEP)
+
+- (BOOL)appendXnnpackExecutionProviderWithOptions:(ORTXnnpackExecutionProviderOptions*)options
+                                            error:(NSError**)error {
+  try {
+    NSDictionary* provider_options = @{
+      @"intra_op_num_threads" : [NSString stringWithFormat:@"%d", options.intra_op_num_threads]
+    };
+    return [self appendExecutionProvider:@"XNNPACK" providerOptions:provider_options error:error];
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error);
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

swift/OnnxRuntimeBindingsTests/SwiftOnnxRuntimeBindingsTests.swift

@@ -0,0 +1,62 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+import XCTest
+import Foundation
+@testable import OnnxRuntimeBindings
+
+final class SwiftOnnxRuntimeBindingsTests: XCTestCase {
+    let modelPath: String = Bundle.module.url(forResource: "single_add.basic", withExtension: "ort")!.path
+
+    func testGetVersionString() throws {
+        do {
+            let version = ORTVersion()
+            XCTAssertNotNil(version)
+        } catch let error {
+            XCTFail(error.localizedDescription)
+        }
+    }
+
+    func testCreateSession() throws {
+        do {
+            let env = try ORTEnv(loggingLevel: ORTLoggingLevel.verbose)
+            let options = try ORTSessionOptions()
+            try options.setLogSeverityLevel(ORTLoggingLevel.verbose)
+            try options.setIntraOpNumThreads(1)
+            // Create the ORTSession
+            _ = try ORTSession(env: env, modelPath: modelPath, sessionOptions: options)
+        } catch let error {
+            XCTFail(error.localizedDescription)
+        }
+    }
+
+    func testAppendCoreMLEP() throws {
+        do {
+            let env = try ORTEnv(loggingLevel: ORTLoggingLevel.verbose)
+            let sessionOptions: ORTSessionOptions = try ORTSessionOptions()
+            let coreMLOptions: ORTCoreMLExecutionProviderOptions = ORTCoreMLExecutionProviderOptions()
+            coreMLOptions.enableOnSubgraphs = true
+            try sessionOptions.appendCoreMLExecutionProvider(with: coreMLOptions)
+
+            XCTAssertTrue(ORTIsCoreMLExecutionProviderAvailable())
+            _ = try ORTSession(env: env, modelPath: modelPath, sessionOptions: sessionOptions)
+        } catch let error {
+            XCTFail(error.localizedDescription)
+        }
+    }
+
+    func testAppendXnnpackEP() throws {
+        do {
+            let env = try ORTEnv(loggingLevel: ORTLoggingLevel.verbose)
+            let sessionOptions: ORTSessionOptions = try ORTSessionOptions()
+            let XnnpackOptions: ORTXnnpackExecutionProviderOptions = ORTXnnpackExecutionProviderOptions()
+            XnnpackOptions.intra_op_num_threads = 2
+            try sessionOptions.appendXnnpackExecutionProvider(with: XnnpackOptions)
+
+            XCTAssertTrue(ORTIsCoreMLExecutionProviderAvailable())
+            _ = try ORTSession(env: env, modelPath: modelPath, sessionOptions: sessionOptions)
+        } catch let error {
+            XCTFail(error.localizedDescription)
+        }
+    }
+}