1 files changed, 48 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/mq_close.c b/newlib/libc/sys/linux/mq_close.c
new file mode 100644
index 000000000..f80744327
--- /dev/null
+++ b/newlib/libc/sys/linux/mq_close.c
@@ -0,0 +1,48 @@
+/* Copyright 2002, Red Hat Inc. */
+
+#include <mqueue.h>
+#include <errno.h>
+#include <sys/sem.h>
+#define _LIBC
+#include <sys/lock.h>
+#undef _LIBC
+
+#include "mqlocal.h"
+
+int
+mq_close (mqd_t msgid)
+{
+  struct libc_mq *info;
+  struct sembuf sb0 = {0, -1, 0};
+  int rc;
+  int semid;
+
+  info = __find_mq (msgid);
+
+  if (info == NULL)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  /* lock message queue */
+  semid = info->semid;
+  rc = semop (semid, &sb0, 1);
+
+  if (rc == 0)
+    {
+      __cleanup_mq (msgid);
+      
+      /* unlock message queue */
+      sb0.sem_op = 1;
+      semop (semid, &sb0, 1);
+    }
+
+  return rc;
+}
+      
+
+
+
+
+