libobs: Add ability to set thread names

libobs/util/threading-posix.c

@@ -20,6 +20,7 @@
 #include <mach/task.h>
 #include <mach/mach_init.h>
 #else
+#define _GNU_SOURCE
 #include <semaphore.h>
 #endif
 
@@ -248,3 +249,12 @@ long os_atomic_dec_long(volatile long *val)
 {
 	return __sync_sub_and_fetch(val, 1);
 }
+
+void os_set_thread_name(const char *name)
+{
+#ifdef __APPLE__
+	pthread_setname_np(name);
+#else
+	pthread_setname_np(pthread_self(), name);
+#endif
+}

libobs/util/threading-windows.c

@@ -160,3 +160,32 @@ long os_atomic_dec_long(volatile long *val)
 {
 	return InterlockedDecrement(val);
 }
+
+#define VC_EXCEPTION 0x406D1388
+
+#pragma pack(push,8)
+struct vs_threadname_info {
+	DWORD type; /* 0x1000 */
+	const char *name;
+	DWORD thread_id;
+	DWORD flags;
+};
+#pragma pack(pop)
+
+#define THREADNAME_INFO_SIZE \
+	(sizeof(struct vs_threadname_info) / sizeof(ULONG_PTR))
+
+void os_set_thread_name(const char *name)
+{
+	struct vs_threadname_info info;
+	info.type = 0x1000;
+	info.name = name;
+	info.thread_id = GetCurrentThreadId();
+	info.flags = 0;
+
+	__try {
+		RaiseException(VC_EXCEPTION, 0, THREADNAME_INFO_SIZE,
+				(ULONG_PTR*)&info);
+	} __except(EXCEPTION_EXECUTE_HANDLER) {
+	}
+}

libobs/util/threading.h

@@ -73,6 +73,8 @@ EXPORT int  os_sem_wait(os_sem_t *sem);
 EXPORT long os_atomic_inc_long(volatile long *val);
 EXPORT long os_atomic_dec_long(volatile long *val);
 
+EXPORT void os_set_thread_name(const char *name);
+
 
 #ifdef __cplusplus
 }