Added strict concurrency checking and Sendable conformances

Half.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "Half"
-  s.version      = "1.4.1"
+  s.version      = "1.4.2"
   s.summary      = "Swift Half-Precision Floating Point"
   s.description  = <<-DESC
                    A lightweight framework containing a Swift implementation for a half-precision floating point type for iOS, macOS, tvOS, and watchOS.
@@ -17,8 +17,9 @@ Pod::Spec.new do |s|
   s.tvos.deployment_target    = '12.0'
   s.watchos.deployment_target = '4.0'
 
-  s.source_files      = 'Sources/**/*.{swift,h,c}'
-  s.swift_versions    = ['5.0']
-  s.cocoapods_version = '>= 1.7.3'
+  s.source_files        = 'Sources/**/*.{swift,h,c}'
+  s.pod_target_xcconfig = { 'SWIFT_STRICT_CONCURRENCY' => 'complete' }
+  s.swift_versions      = ['5.0']
+  s.cocoapods_version   = '>= 1.7.3'
 
 end

Half.xcodeproj/project.pbxproj

@@ -1030,6 +1030,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -1094,6 +1095,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.8
 import PackageDescription
 
 let package = Package(
@@ -17,9 +17,27 @@ let package = Package(
 
     targets: [
         .target(name: "CHalf"),
-        .testTarget(name: "CHalfTests", dependencies: ["CHalf", "Half"]),
+        .testTarget(
+            name: "CHalfTests",
+            dependencies: ["CHalf", "Half"],
+            swiftSettings: [
+                .enableExperimentalFeature("StrictConcurrency")
+            ]
+        ),
 
-        .target(name: "Half", dependencies: ["CHalf"]),
-        .testTarget(name: "HalfTests", dependencies: ["Half"])
+        .target(
+            name: "Half",
+            dependencies: ["CHalf"],
+            swiftSettings: [
+                .enableExperimentalFeature("StrictConcurrency")
+            ]
+        ),
+        .testTarget(
+            name: "HalfTests",
+            dependencies: ["Half"],
+            swiftSettings: [
+                .enableExperimentalFeature("StrictConcurrency")
+            ]
+        )
     ]
 )

Sources/CHalf/include/half.h

@@ -28,10 +28,19 @@
 #define HALF_FUNC HALF_CONST
 #define HALF_OFUNC HALF_FUNC __attribute__((__overloadable__))
 
+// Copied from <Foundation/NSObjCRuntime.h> since that header cannot be imported
+#if !defined(NS_SWIFT_SENDABLE)
+#   if defined(__SWIFT_ATTR_SUPPORTS_SENDABLE_DECLS) && __SWIFT_ATTR_SUPPORTS_SENDABLE_DECLS
+#       define NS_SWIFT_SENDABLE __attribute__((swift_attr("@Sendable")))
+#   else
+#       define NS_SWIFT_SENDABLE
+#   endif
+#endif // #if !defined(NS_SWIFT_SENDABLE)
+
 typedef union {
     uint16_t _bits;
     __fp16 _fp;
-} __attribute__((packed)) half_t;
+} __attribute__((packed)) NS_SWIFT_SENDABLE half_t;
 
 EXTERN_C HALF_FUNC half_t _half_zero(void);
 EXTERN_C HALF_FUNC half_t _half_epsilon(void);

Sources/Half/Half.swift

@@ -13,12 +13,10 @@ import CHalf
 import CoreGraphics.CGBase
 #endif // #if os(iOS) || os(macOS) || os(tvOS) || os(watchOS)
 
-#if swift(>=5.0)
 // MARK: - Half Definition
 
-#if swift(>=5.1)
 /// A half-precision, floating-point value type.
-@frozen public struct Half {
+@frozen public struct Half: Sendable {
 
     // MARK: Public Properties
 
@@ -36,27 +34,6 @@ import CoreGraphics.CGBase
         self._value = _value
     }
 }
-#else
-/// A half-precision, floating-point value type.
-public struct Half {
-
-    // MARK: Public Properties
-
-    public var _value: half_t
-
-    // MARK: Initialization
-
-    @_transparent
-    public init() {
-        self._value = _half_zero()
-    }
-
-    @_transparent
-    public init(_ _value: half_t) {
-        self._value = _value
-    }
-}
-#endif
 
 // MARK: - Half Extension
 
@@ -1984,4 +1961,3 @@ extension Half: CustomPlaygroundDisplayConvertible {
         return Float(self)
     }
 }
-#endif // #if swift(>=5.0)