NuttX RTOS

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 120 insertions, 0 deletions

diff --git a/nuttx/include/mqueue.h b/nuttx/include/mqueue.h
new file mode 100644
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+/************************************************************
+ * mqueue.h
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************/
+
+#ifndef __MQUEUE_H
+#define __MQUEUE_H
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <sys/types.h>
+#include <signal.h>
+#include "queue.h"
+
+/************************************************************
+ * Compilations Switches
+ ************************************************************/
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Global Type Declarations
+ ************************************************************/
+
+/* Message queue attributes */
+
+struct mq_attr
+{
+  size_t         mq_maxmsg;   /* Max number of messages in queue */
+  size_t         mq_msgsize;  /* Max message size */
+  unsigned       mq_flags;    /* Queue flags */
+  size_t         mq_curmsgs;  /* Number of messages currently in queue */
+};
+
+/* The following is used to attach a signal to a message queue
+ * to notify a task when a message is available on a queue
+ */
+
+struct sigevent {
+   int          sigev_signo;
+   union sigval sigev_value;
+   int          sigev_notify;
+};
+
+/* Message queue descriptor */
+
+typedef struct mq_des *mqd_t;
+
+/************************************************************
+ * Global Variables
+ ************************************************************/
+
+/************************************************************
+ * Global Function Prototypes
+ ************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+EXTERN mqd_t   mq_open(const char *mq_name,
+                  int oflags, ... );
+EXTERN int     mq_close(mqd_t mqdes );
+EXTERN int     mq_unlink(const char *mq_name );
+EXTERN int     mq_send(mqd_t mqdes, const void *msg,
+                  size_t msglen, int prio );
+EXTERN int     mq_receive(mqd_t mqdes, void *msg,
+                  size_t msglen, int *prio );
+EXTERN int     mq_notify(mqd_t mqdes,
+                  const struct sigevent *notification );
+EXTERN int     mq_setattr(mqd_t mqdes,
+                  const struct mq_attr *mq_stat,
+                  struct mq_attr *oldstat);
+EXTERN int     mq_getattr(mqd_t mqdes,
+                  struct mq_attr *mq_stat);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MQUEUE_H */
+