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, 97 insertions, 0 deletions

diff --git a/include/mqueue.h b/include/mqueue.h
new file mode 100644
index 000000000..7f978ba34
--- /dev/null
+++ b/include/mqueue.h
@@ -0,0 +1,97 @@
+/*
+ * mqueue.h - definitions and function prototypes for POSIX mqueue support.
+ */
+
+#ifndef _MQUEUE_H
+#define _MQUEUE_H
+
+#include <features.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#define __need_sigevent_t
+#include <bits/siginfo.h>
+#define __need_timespec
+#include <time.h>
+
+typedef int mqd_t;
+
+struct mq_attr {
+    long int mq_flags;		/* Message queue flags */
+    long int mq_maxmsg;		/* Maximum number of messages */
+    long int mq_msgsize;	/* Maximum message size */
+    long int mq_curmsgs;	/* Number of messages currently queued */
+    long int __pad[4];
+};
+
+__BEGIN_DECLS
+
+/*
+ * Establish connection between a process and a message queue __name and
+ * return message queue descriptor or (mqd_t) -1 on error. __oflag determines
+ * the type of access used. If O_CREAT is on __oflag, the third argument is
+ * taken as a `mode_t', the mode of the created message queue, and the fourth
+ * argument is taken as `struct mq_attr *', pointer to message queue
+ * attributes. If the fourth argument is NULL, default attributes are used.
+ */
+extern mqd_t mq_open(const char *__name, int __oflag, ...) __THROW;
+
+/*
+ * Remove the association between message queue descriptor __mqdes and its
+ * message queue.
+ */
+extern int mq_close(mqd_t __mqdes) __THROW;
+
+/* Query status and attributes of message queue __mqdes */
+extern int mq_getattr(mqd_t __mqdes, struct mq_attr *__mqstat) __THROW;
+
+/*
+ * Set attributes associated with message queue __mqdes and if __omqstat is
+ * not NULL also query its old attributes.
+ */
+extern int mq_setattr(mqd_t __mqdes,
+		      const struct mq_attr *__restrict __mqstat,
+		      struct mq_attr *__restrict __omqstat) __THROW;
+
+/* Remove message queue named __name */
+extern int mq_unlink(const char *__name) __THROW;
+
+/*
+ * Register notification upon message arrival to an empty message queue
+ * __mqdes
+ */
+extern int mq_notify(mqd_t __mqdes, const struct sigevent *__notification)
+     __THROW;
+
+/*
+ * Receive the oldest from highest priority messages in message queue
+ * __mqdes
+ */
+extern ssize_t mq_receive(mqd_t __mqdes, char *__msg_ptr, size_t __msg_len,
+			  unsigned int *__msg_prio);
+
+/* Add message pointed by __msg_ptr to message queue __mqdes */
+extern int mq_send(mqd_t __mqdes, const char *__msg_ptr, size_t __msg_len,
+		   unsigned int __msg_prio);
+
+#ifdef __USE_XOPEN2K
+/*
+ * Receive the oldest from highest priority messages in message queue
+ * __mqdes, stop waiting if __abs_timeout expires.
+ */
+extern ssize_t mq_timedreceive(mqd_t __mqdes, char *__restrict __msg_ptr,
+			       size_t __msg_len,
+			       unsigned int *__restrict __msg_prio,
+			       const struct timespec *__restrict __abs_timeout);
+
+/*
+ * Add message pointed by __msg_ptr to message queue __mqdes, stop blocking
+ * on full message queue if __abs_timeout expires.
+ */
+extern int mq_timedsend(mqd_t __mqdes, const char *__msg_ptr,
+			size_t __msg_len, unsigned int __msg_prio,
+			const struct timespec *__abs_timeout);
+#endif
+
+__END_DECLS
+
+#endif