Patch from Paul Mundt (lethal) adding an initial librt implementation.

I then reworked the syscall handling and made minor cleanups.  With luck
I've not completely broken his patch...

1 files changed, 28 insertions, 0 deletions

diff --git a/librt/mq_notify.c b/librt/mq_notify.c
new file mode 100644
index 000000000..4e7953242
--- /dev/null
+++ b/librt/mq_notify.c
@@ -0,0 +1,28 @@
+/*
+ * mq_notify.c - notify process that a message is available.
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <sys/syscall.h>
+
+#include <mqueue.h>
+
+#ifdef __NR_mq_notify
+
+#define __NR___syscall_mq_notify __NR_mq_notify
+static inline _syscall2(int, __syscall_mq_notify, int, mqdes,
+	const void *, notification);
+
+/* Register notification upon message arrival to an empty message queue */
+int mq_notify(mqd_t mqdes, const struct sigevent *notification)
+{
+    /* We don't support SIGEV_THREAD notification yet */
+    if (notification != NULL && notification->sigev_notify == SIGEV_THREAD) {
+	__set_errno(ENOSYS);
+	return -1;
+    }
+    return __syscall_mq_notify(mqdes, notification);
+}
+
+#endif