win32/pthread: add support for pthread_mutex_trylock

2 files changed, 11 insertions, 0 deletions

diff --git a/osdep/win32/include/pthread.h b/osdep/win32/include/pthread.h
index b955e722ae..71dc8084a4 100644
--- a/osdep/win32/include/pthread.h
+++ b/osdep/win32/include/pthread.h
@@ -33,6 +33,7 @@
 #define pthread_mutex_destroy m_pthread_mutex_destroy
 #define pthread_mutex_init m_pthread_mutex_init
 #define pthread_mutex_lock m_pthread_mutex_lock
+#define pthread_mutex_trylock m_pthread_mutex_trylock
 #define pthread_mutex_unlock m_pthread_mutex_unlock
 #define pthread_cond_timedwait m_pthread_cond_timedwait
 #define pthread_cond_wait m_pthread_cond_wait
@@ -71,6 +72,7 @@ int pthread_mutex_init(pthread_mutex_t *restrict mutex,
                        const pthread_mutexattr_t *restrict attr);
 
 int pthread_mutex_lock(pthread_mutex_t *mutex);
+int pthread_mutex_trylock(pthread_mutex_t *mutex);
 int pthread_mutex_unlock(pthread_mutex_t *mutex);
 
 #define pthread_cond_t CONDITION_VARIABLE
diff --git a/osdep/win32/pthread.c b/osdep/win32/pthread.c
index 9bc7f0057d..11a0c50476 100644
--- a/osdep/win32/pthread.c
+++ b/osdep/win32/pthread.c
@@ -66,6 +66,15 @@ int pthread_mutex_lock(pthread_mutex_t *mutex)
     return 0;
 }
 
+int pthread_mutex_trylock(pthread_mutex_t *mutex)
+{
+    if (mutex->use_cs) {
+        return !TryEnterCriticalSection(&mutex->lock.cs);
+    } else {
+        return !TryAcquireSRWLockExclusive(&mutex->lock.srw);
+    }
+}
+
 int pthread_mutex_unlock(pthread_mutex_t *mutex)
 {
     if (mutex->use_cs) {