NuttX RTOS

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

1 files changed, 333 insertions, 0 deletions

diff --git a/nuttx/examples/ostest/mqueue.c b/nuttx/examples/ostest/mqueue.c
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+/**************************************************************************
+ * mqueue.c
+ *
+ *   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.
+ *
+ **************************************************************************/
+
+/**************************************************************************
+ * Included Files
+ **************************************************************************/
+
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <mqueue.h>
+#include <sched.h>
+
+#include "ostest.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+
+#define TEST_MESSAGE "This is a test and only a test"
+#define TEST_MSGLEN  (strlen(TEST_MESSAGE)+1)
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+static void *sender_thread(void *arg)
+{
+  mqd_t mqfd;
+  char msg_buffer[TEST_MSGLEN];
+  struct mq_attr attr;
+  int status = 0;
+  int nerrors = 0;
+  int i;
+
+  printf("%s: Starting\n", __FUNCTION__);
+
+  /* Fill in attributes for message queue */
+
+  attr.mq_maxmsg  = 20;
+  attr.mq_msgsize = TEST_MSGLEN;
+  attr.mq_flags   = 0;
+
+  /* Set the flags for the open of the queue.
+   * Make it a blocking open on the queue, meaning it will block if
+   * this process tries to send to the queue and the queue is full.
+   *
+   *   O_CREAT - the queue will get created if it does not already exist.
+   *   O_WRONLY - we are only planning to write to the queue.
+   *
+   * Open the queue, and create it if the receiving process hasn't
+   * already created it.
+   */
+
+  mqfd = mq_open("testmq", O_WRONLY|O_CREAT, 0666, &attr);
+  if (mqfd < 0)
+    {
+	printf("%s: ERROR mq_open failed\n", __FUNCTION__);
+        pthread_exit((void*)1);
+    }
+
+  /* Fill in a test message buffer to send */
+
+  memcpy(msg_buffer, TEST_MESSAGE, TEST_MSGLEN);
+
+  /* Perform the send 10 times */
+
+  for (i = 0; i < 10; i++)
+    {
+      status = mq_send(mqfd, msg_buffer, TEST_MSGLEN, 42);
+      if (status < 0)
+        {
+          printf("%s: ERROR mq_send failure=%d on msg %d\n", __FUNCTION__, status, i);
+          nerrors++;
+        }
+      else
+        {
+          printf("%s: mq_send succeeded on msg %d\n", __FUNCTION__, i);
+        }
+    }
+
+  /* Close the queue and return success */
+
+  if (mq_close(mqfd) < 0)
+    {
+      printf("%s: ERROR mq_close failed\n", __FUNCTION__);
+    }
+
+  printf("%s: returning nerrors=%d\n", __FUNCTION__, nerrors);
+  return (void*)nerrors;
+}
+
+static void *receiver_thread(void *arg)
+{
+  mqd_t mqfd;
+  char msg_buffer[TEST_MSGLEN];
+  struct mq_attr attr;
+  int nbytes;
+  int nerrors = 0;
+  int i;
+
+  printf("%s: Starting\n", __FUNCTION__);
+
+  /* Fill in attributes for message queue */
+
+  attr.mq_maxmsg  = 20;
+  attr.mq_msgsize = TEST_MSGLEN;
+  attr.mq_flags   = 0;
+
+  /* Set the flags for the open of the queue.
+   * Make it a blocking open on the queue, meaning it will block if
+   * this process tries to* send to the queue and the queue is full.
+   *
+   *   O_CREAT - the queue will get created if it does not already exist.
+   *   O_RDONLY - we are only planning to write to the queue.
+   *
+   * Open the queue, and create it if the sending process hasn't
+   * already created it.
+   */
+
+   mqfd = mq_open("testmq", O_RDONLY|O_CREAT, 0666, &attr);
+   if (mqfd < 0)
+     {
+       printf("%s: ERROR mq_open failed\n", __FUNCTION__);
+       pthread_exit((void*)1);
+     }
+
+   /* Perform the receive 10 times */
+
+   for (i = 0; i < 10; i++)
+    {
+      nbytes = mq_receive(mqfd, msg_buffer, TEST_MSGLEN, 0);
+      if (nbytes < 0)
+        {
+          printf("%s: ERROR mq_receive failure on msg %d\n", __FUNCTION__, i);
+          nerrors++;
+        }
+      else if (nbytes != TEST_MSGLEN)
+        {
+          printf("%s: mq_receive return bad size %d on msg %d\n", __FUNCTION__, nbytes, i);
+          nerrors++;
+        }
+      else if (memcmp(TEST_MESSAGE, msg_buffer, nbytes) != 0)
+        {
+          int j;
+
+          printf("%s: mq_receive returned corrupt message on msg %d\n", __FUNCTION__, i);
+          printf("%s:                  i  Expected Received\n", __FUNCTION__);
+
+          for (j = 0; j < TEST_MSGLEN-1; j++)
+            {
+              printf("%s:                  %2d %02x (%c) %02x\n",
+                     __FUNCTION__,
+                     j, TEST_MESSAGE[j], TEST_MESSAGE[j], msg_buffer[j] & 0x0ff);
+            }
+          printf("%s:                  %2d 00     %02x\n",
+                  __FUNCTION__, j, msg_buffer[j] & 0xff);
+        }
+      else
+        {
+          printf("%s: mq_receive succeeded on msg %d\n", __FUNCTION__, i);
+        }
+    }
+
+  /* Close the queue and return success */
+
+  if (mq_close(mqfd) < 0)
+    {
+      printf("%s: ERROR mq_close failed\n", __FUNCTION__);
+      nerrors++;
+    }
+
+  pthread_exit((void*)nerrors);
+
+  /* Destroy the queue */
+
+  if (mq_unlink("testmq") < 0)
+    {
+      printf("%s: ERROR mq_close failed\n", __FUNCTION__);
+      nerrors++;
+    }
+
+  printf("%s: returning nerrors=%d\n", __FUNCTION__, nerrors);
+  return (void*)nerrors;
+}
+
+void mqueue_test(void)
+{
+  pthread_t sender;
+  pthread_t receiver;
+  void *result;
+  pthread_attr_t attr;
+  struct sched_param sparam;
+  int prio_min;
+  int prio_max;
+  int prio_mid;
+  int status;
+
+  /* Start the sending thread at higher priority */
+
+  printf("%s: Starting receiver\n", __FUNCTION__);
+  status = pthread_attr_init(&attr);
+  if (status != 0)
+    {
+      printf("%s: pthread_attr_init failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  status = pthread_attr_setstacksize(&attr, 16384);
+  if (status != 0)
+    {
+      printf("%s: pthread_attr_setstacksize failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  prio_min = sched_get_priority_min(SCHED_FIFO);
+  prio_max = sched_get_priority_max(SCHED_FIFO);
+  prio_mid = (prio_min + prio_max) / 2;
+
+  sparam.sched_priority = prio_mid;
+  status = pthread_attr_setschedparam(&attr,&sparam);
+  if (status != OK)
+    {
+      printf("%s: pthread_attr_setschedparam failed, status=%d\n", __FUNCTION__, status);
+    }
+  else
+    {
+      printf("%s: Set receiver priority to %d\n", __FUNCTION__, sparam.sched_priority);
+    }
+
+  status = pthread_create(&receiver, &attr, receiver_thread, NULL);
+  if (status != 0)
+    {
+      printf("%s: pthread_create failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Start the sending thread at lower priority */
+
+  printf("%s: Starting sender\n", __FUNCTION__);
+  status = pthread_attr_init(&attr);
+  if (status != 0)
+    {
+      printf("%s: pthread_attr_init failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  status = pthread_attr_setstacksize(&attr, 16384);
+  if (status != 0)
+    {
+      printf("%s: pthread_attr_setstacksize failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  sparam.sched_priority = (prio_min + prio_mid) / 2;
+  status = pthread_attr_setschedparam(&attr,&sparam);
+  if (status != OK)
+    {
+      printf("%s: pthread_attr_setschedparam failed, status=%d\n", __FUNCTION__, status);
+    }
+  else
+    {
+      printf("%s: Set sender thread priority to %d\n", __FUNCTION__, sparam.sched_priority);
+    }
+
+  status = pthread_create(&sender, &attr, sender_thread, NULL);
+  if (status != 0)
+    {
+      printf("%s: pthread_create failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  pthread_join(sender, &result);
+  if (result != (void*)0)
+    {
+      printf("%s: ERROR sender thread exited with %d errors\n", __FUNCTION__, (int)result);
+    }
+
+  pthread_cancel(receiver);
+  pthread_join(receiver, &result);
+  if (result != (void*)0)
+    {
+      printf("%s: ERROR receiver thread exited with %d errors\n", __FUNCTION__, (int)result);
+    }
+}
+
+