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authorRich Felker <dalias@aerifal.cx>2011-03-04 00:45:59 -0500
committerRich Felker <dalias@aerifal.cx>2011-03-04 00:45:59 -0500
commit6fc5fdbdc70dd17ea8e681a361fb4dae541ee953 (patch)
treeeee28ceddc2de85e528e50340e045a875e6a8e60 /src/thread/sem_getvalue.c
parent03dcc3417ce4388a652bdd053cb2b6af860daf00 (diff)
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implement POSIX semaphores
Diffstat (limited to 'src/thread/sem_getvalue.c')
-rw-r--r--src/thread/sem_getvalue.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/thread/sem_getvalue.c b/src/thread/sem_getvalue.c
new file mode 100644
index 00000000..643c0968
--- /dev/null
+++ b/src/thread/sem_getvalue.c
@@ -0,0 +1,8 @@
+#include <semaphore.h>
+
+int sem_getvalue(sem_t *sem, int *valp)
+{
+	int val = sem->__val[0];
+	*valp = val < 0 ? 0 : val;
+	return 0;
+}