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