Foundations

Foundation/c_Mutex.c

@@ -0,0 +1,63 @@
+#include <c_Mutex.h>
+
+c_err_t c_Mutex_Init(c_Mutex_t* mutex) {
+    if (!mutex) return C_ERR_FAIL;
+
+#if defined(PLATFORM_WINDOWS)
+    // InitializeCriticalSection 不会失败，但 InitializeCriticalSectionAndSpinCount 可能会
+    // 工业级推荐直接使用此 API，性能优秀
+    InitializeCriticalSection(&mutex->handle);
+    mutex->is_initialized = C_TRUE;
+    return C_ERR_OK;
+#elif defined(PLATFORM_POSIX)
+    // POSIX 默认是 PTHREAD_MUTEX_DEFAULT (不可重入锁)
+    if (pthread_mutex_init(&mutex->handle, NULL) == 0) {
+        mutex->is_initialized = C_TRUE;
+        return C_ERR_OK;
+    }
+    return C_ERR_FAIL;
+#endif
+}
+
+void c_Mutex_Destroy(c_Mutex_t* mutex) {
+    if (!mutex || !mutex->is_initialized) return;
+
+#if defined(PLATFORM_WINDOWS)
+    DeleteCriticalSection(&mutex->handle);
+#elif defined(PLATFORM_POSIX)
+    pthread_mutex_destroy(&mutex->handle);
+#endif
+    mutex->is_initialized = C_FALSE;
+}
+
+
+void c_Mutex_Lock(c_Mutex_t* mutex) {
+    if (!mutex || !mutex->is_initialized) return;
+#if defined(PLATFORM_WINDOWS)
+    EnterCriticalSection(&mutex->handle);
+#elif defined(PLATFORM_POSIX)
+    pthread_mutex_lock(&mutex->handle);
+#endif
+}
+
+c_bool_t c_Mutex_TryLock(c_Mutex_t* mutex) {
+    if (!mutex || !mutex->is_initialized) return C_FALSE;
+
+#if defined(PLATFORM_WINDOWS)
+    // TryEnterCriticalSection 返回非 0 表示成功
+    return (TryEnterCriticalSection(&mutex->handle) != 0)?C_TRUE:C_FALSE;
+#elif defined(PLATFORM_POSIX)
+    // pthread_mutex_trylock 返回 0 表示成功
+    return (pthread_mutex_trylock(&mutex->handle) == 0)?C_TRUE:C_FALSE;
+#endif
+}
+
+
+void c_Mutex_UnLock(c_Mutex_t* mutex) {
+    if (!mutex || !mutex->is_initialized) return;
+#if defined(PLATFORM_WINDOWS)
+    LeaveCriticalSection(&mutex->handle);
+#elif defined(PLATFORM_POSIX)
+    pthread_mutex_unlock(&mutex->handle);
+#endif
+}