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cKit/Foundation/c_Cond.c

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+#include <c_Cond.h>
+
+#if defined(PLATFORM_POSIX)
+#include <sys/time.h>
+#include <time.h>
+#endif
+
+c_err_t c_Cond_Init(c_Cond_t* cond) {
+    if (!cond) return C_ERR_PARAM;
+
+#if defined(PLATFORM_WINDOWS)
+    // Windows 的条件变量初始化只是一个清零操作，不会失败
+    InitializeConditionVariable(&cond->handle);
+    cond->is_initialized = C_TRUE;
+    return C_ERR_SUCCESS;
+#elif defined(PLATFORM_POSIX)
+    if (pthread_cond_init(&cond->handle, NULL) == 0) {
+        cond->is_initialized = C_TRUE;
+        return C_ERR_SUCCESS;
+    }
+    return C_ERR_FAIL;
+#endif
+}
+
+
+void c_Cond_Destroy(c_Cond_t* cond) {
+    if (!cond || !cond->is_initialized) return;
+
+#if defined(PLATFORM_WINDOWS)
+    // Windows 的 CONDITION_VARIABLE 不需要显式销毁（内核会自动回收）
+#elif defined(PLATFORM_POSIX)
+    pthread_cond_destroy(&cond->handle);
+#endif
+    cond->is_initialized = C_FALSE;
+}
+
+void c_Cond_Wait(c_Cond_t* cond, c_Mutex_t* mutex) {
+    if (!cond || !cond->is_initialized || !mutex || !mutex->is_initialized) return;
+
+#if defined(PLATFORM_WINDOWS)
+    // SleepConditionVariableCS 会自动在内部释放传入的锁，并在唤醒时重新重新获取锁
+    SleepConditionVariableCS(&cond->handle, &mutex->handle, INFINITE);
+#elif defined(PLATFORM_POSIX)
+    pthread_cond_wait(&cond->handle, &mutex->handle);
+#endif
+}
+
+c_bool_t c_Cond_TimedWait(c_Cond_t* cond, c_Mutex_t* mutex, c_uint_t timeout_ms) {
+    if (!cond || !cond->is_initialized || !mutex || !mutex->is_initialized) return false;
+
+#if defined(PLATFORM_WINDOWS)
+    // 返回非 0 表示成功（收到信号），返回 0 表示超时
+    return SleepConditionVariableCS(&cond->handle, &mutex->handle, timeout_ms) != 0;
+#elif defined(PLATFORM_POSIX)
+    struct timespec ts;
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+
+    // 计算绝对终止时间
+    long long ns = (long long)tv.tv_usec * 1000 + (long long)timeout_ms * 1000000;
+    ts.tv_sec = tv.tv_sec + ns / 1000000000LL;
+    ts.tv_nsec = ns % 1000000000LL;
+
+    // 返回 0 表示成功收到信号
+    return pthread_cond_timedwait(&cond->handle, &mutex->handle, &ts) == 0;
+#endif
+}
+
+void c_Cond_Signal(c_Cond_t* cond) {
+    if (!cond || !cond->is_initialized) return;
+
+#if defined(PLATFORM_WINDOWS)
+    WakeConditionVariable(&cond->handle);
+#elif defined(PLATFORM_POSIX)
+    pthread_cond_signal(&cond->handle);
+#endif
+}
+
+void c_Cond_Broadcast(c_Cond_t* cond) {
+    if (!cond || !cond->is_initialized) return;
+
+#if defined(PLATFORM_WINDOWS)
+    WakeAllConditionVariable(&cond->handle);
+#elif defined(PLATFORM_POSIX)
+    pthread_cond_broadcast(&cond->handle);
+#endif
+}
+