Make Mutx lock/unlock return int.

1 files changed, 7 insertions, 2 deletions

diff --git a/include/qntan/Qntan.h b/include/qntan/Qntan.h
index 85c55f2..e0bfab7 100644
--- a/include/qntan/Qntan.h
+++ b/include/qntan/Qntan.h
@@ -837,10 +837,15 @@ struct Qntan_Mutx {
 	/* Same idea as a `pthread_mutex_t`, just using virtual funcs, to
 	 * increase overkill and make some people sad :D
 	 */
-	void (*lock)( struct Qntan_Mutx** );
+	int (*lock)( struct Qntan_Mutx** );
 	/* Like `pthread_mutex_lock()`
+	 * WARN: this call may block if mutx already locked! So make sure you
+	 * either
+	 * NEVER HOLD THE MUTX FOR TOO LONG ANYWHERE,
+	 * or
+	 * only `lock()` from threads where blocking is ok.
 	 */
-	void (*unlock)( struct Qntan_Mutx** );
+	int (*unlock)( struct Qntan_Mutx** );
 	/* Like `pthread_mutex_unlock()`
 	 */
 };