Used in FreeBSD IPv6 code sys/netinet6/frag6.c IP6Q_TRYLOCK().
---
bsd/porting/sync_stub.c | 5 +++++
bsd/porting/sync_stub.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/bsd/porting/sync_stub.c b/bsd/porting/sync_stub.c
index 8d341d8..e871b20 100644
--- a/bsd/porting/sync_stub.c
+++ b/bsd/porting/sync_stub.c
@@ -26,6 +26,11 @@ void mtx_lock(struct mtx *mp)
mutex_lock(&mp->_mutex);
}
+int mtx_trylock(struct mtx *mp)
+{
+ return mutex_trylock(&mp->_mutex) ? 1 : 0;
+}
+
void mtx_unlock(struct mtx *mp)
{
mutex_unlock(&mp->_mutex);
diff --git a/bsd/porting/sync_stub.h b/bsd/porting/sync_stub.h
index 8ffc09b..f666984 100644
--- a/bsd/porting/sync_stub.h
+++ b/bsd/porting/sync_stub.h
@@ -32,6 +32,7 @@ __BEGIN_DECLS
void mtx_init(struct mtx *m, const char *name, const char *type, int opts);
void mtx_destroy(struct mtx *m);
void mtx_lock(struct mtx *mp);
+int mtx_trylock(struct mtx *mp);
void mtx_unlock(struct mtx *mp);
void mtx_assert(struct mtx *mp, int flag);
--
2.7.4
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