106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
#include "runtime.h"
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#include "threading.h"
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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struct vy_mutex_s {
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HANDLE handle;
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ptrdiff_t next_reusable;
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};
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#define MAX_MUTEX 1024
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static vy_mutex _mutex[MAX_MUTEX];
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static ptrdiff_t _first_reusable = MAX_MUTEX;
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static ptrdiff_t _next = 0;
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VY_DLLEXPORT vy_mutex *vyCreateMutex(void) {
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if (_first_reusable < MAX_MUTEX) {
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vy_mutex *mtx = &_mutex[_first_reusable];
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_first_reusable = mtx->next_reusable;
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return mtx;
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} else if (_next < MAX_MUTEX) {
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vy_mutex *mtx = &_mutex[_next];
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mtx->handle = CreateMutexW(NULL, FALSE, NULL);
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if (!mtx->handle) {
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vyLog("core", "Mutex creation failed: %u", GetLastError());
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return NULL;
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}
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mtx->next_reusable = MAX_MUTEX;
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++_next;
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return mtx;
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}
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vyReportError("core", "Ran out of mutex objects");
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return NULL;
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}
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VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
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ptrdiff_t index = mutex - &_mutex[0];
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mutex->next_reusable = _first_reusable;
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_first_reusable = index;
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}
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VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {
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return WaitForSingleObject(mutex->handle, INFINITE) == WAIT_OBJECT_0;
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}
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v VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
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return ReleaseMutex(mutex->handle) != 0;
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}
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#elif defined(__linux__)
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#include <pthread.h>
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struct vy_mutex_s {
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pthread_mutex_t handle;
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ptrdiff_t next_reusable;
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};
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#define MAX_MUTEX 1024
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static vy_mutex _mutex[MAX_MUTEX];
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static ptrdiff_t _first_reusable = MAX_MUTEX;
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static ptrdiff_t _next = 0;
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static pthread_mutex_t _guard = PTHREAD_MUTEX_INITIALIZER;
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VY_DLLEXPORT vy_mutex *vyCreateMutex(void) {
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pthread_mutex_lock(&_guard);
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if (_first_reusable < MAX_MUTEX) {
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vy_mutex *mtx = &_mutex[_first_reusable];
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_first_reusable = mtx->next_reusable;
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pthread_mutex_unlock(&_guard);
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return mtx;
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} else if (_next < MAX_MUTEX) {
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vy_mutex *mtx = &_mutex[_next];
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if (pthread_mutex_init(&mtx->handle, NULL) != 0) {
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vyLog("core", "Mutex creation failed");
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pthread_mutex_unlock(&_guard);
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return NULL;
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}
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mtx->next_reusable = MAX_MUTEX;
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++_next;
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pthread_mutex_unlock(&_guard);
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return mtx;
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}
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vyReportError("core", "Ran out of mutex objects");
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pthread_mutex_unlock(&_guard);
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return NULL;
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}
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VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
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ptrdiff_t index = mutex - &_mutex[0];
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pthread_mutex_lock(&_guard);
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mutex->next_reusable = _first_reusable;
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_first_reusable = index;
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pthread_mutex_unlock(&_guard);
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}
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VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {
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return pthread_mutex_lock(&mutex->handle) == 0;
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}
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VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
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return pthread_mutex_unlock(&mutex->handle) == 0;
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}
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#endif
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