Add initial implementation of threads/mutexes/semaphores/cvs/spinlocks

Added initial implementation (or wrapper) of the threading library.
It's rather basic, but should work for most of the tasks.

Unfortunately, spinlock implementation relies on GCC/Clang compiler
built-ins (or in-worst-case-scenario on Win32 - InterlockExchange).
In the future, I should revisit this code and fix/reimplement some stuff
(or add support for Windows XP).

1 files changed, 51 insertions, 0 deletions

diff --git a/src/Platform/Win32/Mutex.c b/src/Platform/Win32/Mutex.c
new file mode 100644
index 0000000..f34aac1
--- /dev/null
+++ b/src/Platform/Win32/Mutex.c
@@ -0,0 +1,51 @@
+#include "Thread.h"
+
+#include <BH/Thread.h>
+
+
+BH_Mutex *BH_MutexNew(void)
+{
+    BH_Mutex *mutex;
+
+    /* Allocate space for mutex and initialize it */
+    mutex = malloc(sizeof(BH_Mutex));
+    if (mutex && !InitializeCriticalSectionAndSpinCount(&mutex->handle, 0x400))
+    {
+        free(mutex);
+        return NULL;
+    }
+
+    return mutex;
+}
+
+
+void BH_MutexFree(BH_Mutex *mutex)
+{
+    DeleteCriticalSection(&mutex->handle);
+    free(mutex);
+}
+
+
+int BH_MutexLock(BH_Mutex *mutex)
+{
+    EnterCriticalSection(&mutex->handle);
+
+    return BH_OK;
+}
+
+
+int BH_MutexUnlock(BH_Mutex *mutex)
+{
+    LeaveCriticalSection(&mutex->handle);
+
+    return BH_OK;
+}
+
+
+int BH_MutexLockTry(BH_Mutex *mutex)
+{
+    if (!TryEnterCriticalSection(&mutex->handle))
+        return BH_ERROR;
+
+    return BH_OK;
+}