From e1e325235ee2f9f81b39d47ac2f9fe529257589e Mon Sep 17 00:00:00 2001
From: KO Myung-Hun <komh78@gmail.com>
Date: Tue, 18 Aug 2026 22:57:20 +0900
Subject: [PATCH] compat/os2threads.h: add pthread_mutex_trylock

---
 compat/os2threads.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/compat/os2threads.h b/compat/os2threads.h
index a061eaa63d..7a8e391f65 100644
--- a/compat/os2threads.h
+++ b/compat/os2threads.h
@@ -123,6 +123,12 @@ static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
     return 0;
 }
 
+static av_always_inline int pthread_mutex_trylock(pthread_mutex_t *mutex)
+{
+    return _fmutex_request(mutex, _FMR_NOWAIT) == ERROR_MUTEX_OWNED ?
+                EBUSY : 0;
+}
+
 static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
 {
     _fmutex_release(mutex);