1 files changed, 73 insertions, 0 deletions
diff --git a/src/Platform/Posix/Semaphore.c b/src/Platform/Posix/Semaphore.c
new file mode 100644
index 0000000..630475f
--- /dev/null
+++ b/src/Platform/Posix/Semaphore.c
@@ -0,0 +1,73 @@
+#include "Thread.h"
+
+#include <BH/Thread.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <time.h>
+
+
+BH_Semaphore *BH_SemaphoreNew(int value)
+{
+    BH_Semaphore *semaphore;
+
+    /* Allocate space for mutex and initialize it */
+    semaphore = malloc(sizeof(BH_Semaphore));
+    if (semaphore && sem_init(&semaphore->handle, 0, value))
+    {
+        free(semaphore);
+        return NULL;
+    }
+
+    return semaphore;
+}
+
+
+void BH_SemaphoreFree(BH_Semaphore *semaphore)
+{
+    sem_destroy(&semaphore->handle);
+    free(semaphore);
+}
+
+
+int BH_SemaphorePost(BH_Semaphore *semaphore)
+{
+    if (sem_post(&semaphore->handle))
+        return BH_ERROR;
+
+    return BH_OK;
+}
+
+
+int BH_SemaphoreWait(BH_Semaphore *semaphore)
+{
+    if (sem_wait(&semaphore->handle))
+        return BH_ERROR;
+
+    return BH_OK;
+}
+
+
+int BH_SemaphoreWaitTry(BH_Semaphore *semaphore)
+{
+    if (sem_trywait(&semaphore->handle))
+        return BH_ERROR;
+
+    return BH_OK;
+}
+
+
+int BH_SemaphoreWaitFor(BH_Semaphore *semaphore,
+                        uint32_t timeout)
+{
+    struct timespec ts;
+
+    ts.tv_sec = timeout / 1000;
+    ts.tv_nsec = (timeout - ts.tv_sec * 1000) * 1000000;
+
+    switch (sem_timedwait(&semaphore->handle, &ts))
+    {
+        case 0: return BH_OK;
+        case ETIMEDOUT: return BH_TIMEOUT;
+        default: return BH_ERROR;
+    }
+}