From ef467338e4a290b0f8978a0701b404e17c5bb048 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Wed, 19 Jun 2002 22:17:33 +0000
Subject: 2002-06-19  Jeff Johnston  <jjohnstn@redhat.com>

        * libc/sys/linux/Makefile.am: Add support for message queue routines,
        ipc routines, and ftok.
        * libc/sys/linux/Makefile.in: Regenerated.
        * libc/sys/linux/ftok.c: New file.
        * libc/sys/linux/ipc.c: Ditto.
        * libc/sys/linux/mq_close.c: Ditto.
        * libc/sys/linux/mq_getattr.c: Ditto.
        * libc/sys/linux/mq_notify.c: Ditto.
        * libc/sys/linux/mq_open.c: Ditto.
        * libc/sys/linux/mq_receive.c: Ditto.
        * libc/sys/linux/mq_send.c: Ditto.
        * libc/sys/linux/mq_setattr.c: Ditto.
        * libc/sys/linux/mq_unlink.c: Ditto.
        * libc/sys/linux/mqlocal.h: Ditto.
        * libc/sys/linux/include/mqueue.h: Ditto.
        * libc/sys/linux/sys/types.h: Define __gid_t_defined and
        __uid_t_defined.
---
 newlib/libc/sys/linux/mq_send.c | 72 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 newlib/libc/sys/linux/mq_send.c

(limited to 'newlib/libc/sys/linux/mq_send.c')

diff --git a/newlib/libc/sys/linux/mq_send.c b/newlib/libc/sys/linux/mq_send.c
new file mode 100644
index 000000000..92710c2f2
--- /dev/null
+++ b/newlib/libc/sys/linux/mq_send.c
@@ -0,0 +1,72 @@
+/* Copyright 2002, Red Hat Inc. */
+
+#include <mqueue.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <string.h>
+#include <stdlib.h>
+#define _LIBC
+#include <sys/lock.h>
+#undef _LIBC
+
+#include "mqlocal.h"
+
+__LOCK_INIT(static, mq_wrbuf_lock);
+
+int
+mq_send (mqd_t msgid, const char *msg, size_t msg_len, unsigned int msg_prio)
+{
+  struct libc_mq *info;
+  struct sembuf sb2 = {2, -1, 0};
+  struct sembuf sb3 = {3, 1, 0};
+  int rc;
+  int ipcflag;
+
+  info = __find_mq (msgid);
+
+  if (info == NULL || (info->oflag & O_ACCMODE) == O_RDONLY)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  if (msg_len > info->attr->mq_msgsize)
+    {
+      errno = EMSGSIZE;
+      return -1;
+    }
+
+  if (msg_prio > MQ_PRIO_MAX)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  __lock_acquire (mq_wrbuf_lock);
+
+  memcpy (info->wrbuf->text, msg, msg_len);
+  info->wrbuf->type = (MQ_PRIO_MAX - msg_prio);
+
+  ipcflag = (info->attr->mq_flags & O_NONBLOCK) ? IPC_NOWAIT : 0;
+  sb2.sem_flg = ipcflag;
+
+  /* check to see if max msgs are on queue */
+  rc = semop (info->semid, &sb2, 1);
+
+  if (rc == 0)
+    rc = msgsnd (info->msgqid, info->wrbuf, msg_len, ipcflag);
+
+  if (rc == 0)
+    semop (info->semid, &sb3, 1);  /* increment number of reads */
+
+  __lock_release (mq_wrbuf_lock);
+  return rc;
+}
+      
+
+
+
+
+
-- 
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