From 4a65e15fbcd6bd95df1f1c598eee2c0043c859fc Mon Sep 17 00:00:00 2001
From: Kyle <kyle201817146@gmail.com>
Date: Tue, 17 Sep 2024 04:22:56 +0800
Subject: [PATCH] Fix non-Darwin build issue

---
 .../Graphic/Color/CoreColor+Extension.swift   |  4 ++-
 .../Data/Other/AtomicBox.swift                | 28 +++++++++++++++++++
 .../Graphics/Color/ColorResolvedTests.swift   |  3 ++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/Sources/OpenSwiftUI/View/Graphic/Color/CoreColor+Extension.swift b/Sources/OpenSwiftUI/View/Graphic/Color/CoreColor+Extension.swift
index 68d9b63e..92f79d19 100644
--- a/Sources/OpenSwiftUI/View/Graphic/Color/CoreColor+Extension.swift
+++ b/Sources/OpenSwiftUI/View/Graphic/Color/CoreColor+Extension.swift
@@ -3,8 +3,9 @@
 //  OpenSwiftUI
 //
 //  Audited for RELEASE_2024
-//  Status: WIP
+//  Status: Complete
 
+#if canImport(Darwin)
 import COpenSwiftUICore
 
 extension CoreColor {
@@ -71,3 +72,4 @@ extension CoreColor {
     #endif
 }
 
+#endif
diff --git a/Sources/OpenSwiftUICore/Data/Other/AtomicBox.swift b/Sources/OpenSwiftUICore/Data/Other/AtomicBox.swift
index 859f7e98..911c009c 100644
--- a/Sources/OpenSwiftUICore/Data/Other/AtomicBox.swift
+++ b/Sources/OpenSwiftUICore/Data/Other/AtomicBox.swift
@@ -8,6 +8,11 @@
 
 import Foundation
 
+// FIXME:
+// Replace with Swift's Mutex and Atomic to simplify cross-platform maintain cost
+// https://github.com/swiftlang/swift-evolution/blob/main/proposals/0433-mutex.md
+// https://github.com/swiftlang/swift-evolution/blob/main/proposals/0410-atomics.md
+#if canImport(Darwin)
 private final class AtomicBuffer<Value>: ManagedBuffer<os_unfair_lock_s, Value> {
     static func allocate(value: Value) -> AtomicBuffer<Value> {
         let buffer = AtomicBuffer.create(minimumCapacity: 1) { buffer in
@@ -19,6 +24,19 @@ private final class AtomicBuffer<Value>: ManagedBuffer<os_unfair_lock_s, Value>
         return unsafeDowncast(buffer, to: AtomicBuffer<Value>.self)
     }
 }
+#else
+private final class AtomicBuffer<Value>: ManagedBuffer<NSLock, Value> {
+    static func allocate(value: Value) -> AtomicBuffer<Value> {
+        let buffer = AtomicBuffer.create(minimumCapacity: 1) { buffer in
+            NSLock()
+        }
+        buffer.withUnsafeMutablePointerToElements { pointer in
+            pointer.initialize(to: value)
+        }
+        return unsafeDowncast(buffer, to: AtomicBuffer<Value>.self)
+    }
+}
+#endif
 
 @propertyWrapper
 package struct AtomicBox<Value> {
@@ -31,13 +49,23 @@ package struct AtomicBox<Value> {
     @inline(__always)
     package var wrappedValue: Value {
         get {
+            #if canImport(Darwin)
             os_unfair_lock_lock(&buffer.header)
             defer { os_unfair_lock_unlock(&buffer.header) }
+            #else
+            buffer.header.lock()
+            defer { buffer.header.unlock() }
+            #endif
             return buffer.withUnsafeMutablePointerToElements { $0.pointee }
         }
         nonmutating _modify {
+            #if canImport(Darwin)
             os_unfair_lock_lock(&buffer.header)
             defer { os_unfair_lock_unlock(&buffer.header) }
+            #else
+            buffer.header.lock()
+            defer { buffer.header.unlock() }
+            #endif
             yield &buffer.withUnsafeMutablePointerToElements { $0 }.pointee
         }
     }
diff --git a/Tests/OpenSwiftUITests/View/Graphics/Color/ColorResolvedTests.swift b/Tests/OpenSwiftUITests/View/Graphics/Color/ColorResolvedTests.swift
index f29ad47e..67410bd8 100644
--- a/Tests/OpenSwiftUITests/View/Graphics/Color/ColorResolvedTests.swift
+++ b/Tests/OpenSwiftUITests/View/Graphics/Color/ColorResolvedTests.swift
@@ -2,6 +2,8 @@
 //  ColorResolvedTests.swift
 //  OpenSwiftUITests
 
+#if canImport(Darwin)
+
 @testable import OpenSwiftUI
 import Testing
 
@@ -17,3 +19,4 @@ struct ColorResolvedTests {
         #expect(r3.kitColor !== r1.kitColor)
     }
 }
+#endif