NuttX RTOS

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

1 files changed, 308 insertions, 0 deletions

diff --git a/nuttx/examples/ostest/cancel.c b/nuttx/examples/ostest/cancel.c
new file mode 100644
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+++ b/nuttx/examples/ostest/cancel.c
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+/***********************************************************************
+ * cancel.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.
+ *
+ ***********************************************************************/
+
+#include <stdio.h>
+#include <time.h>
+#include <pthread.h>
+#include <errno.h>
+#include "ostest.h"
+
+static pthread_mutex_t mutex;
+static pthread_cond_t  cond;
+
+static void *thread_waiter(void *parameter)
+{
+  int status;
+
+  /* Take the mutex */
+
+  printf("%s: Taking mutex\n", __FUNCTION__);
+  status = pthread_mutex_lock(&mutex);
+  if (status != 0)
+    {
+       printf("%s: ERROR pthread_mutex_lock failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  printf("%s: Starting wait for condition\n", __FUNCTION__);
+
+  /* Are we a non-cancelable thread?   Yes, set the non-cancelable state */
+
+  if (!parameter)
+    {
+      printf("%s: Setting non-cancelable\n", __FUNCTION__);
+      status = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+      if (status != 0)
+        {
+           printf("%s: ERROR pthread_setcancelstate failed, status=%d\n", __FUNCTION__, status);
+        }
+    }
+
+  /* The wait -- we will never awaken from this. */
+
+  status = pthread_cond_wait(&cond, &mutex);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cond_wait failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Release the mutex */
+
+  printf("%s: Releasing mutex\n", __FUNCTION__);
+  status = pthread_mutex_unlock(&mutex);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_mutex_unlock failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Set the cancelable state */
+
+  printf("%s: Setting cancelable\n", __FUNCTION__);
+  status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_setcancelstate failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  printf("%s: Exit with status 0x12345678\n", __FUNCTION__);
+  pthread_exit((void*)0x12345678);
+  return NULL;
+}
+
+static void start_thread(pthread_t *waiter, int cancelable)
+{
+  pthread_attr_t attr;
+  int status;
+
+  /* Initialize the mutex */
+
+  printf("%s: Initializing mutex\n", __FUNCTION__);
+  status = pthread_mutex_init(&mutex, NULL);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_mutex_init failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Initialize the condition variable */
+
+  printf("%s: Initializing cond\n", __FUNCTION__);
+  status = pthread_cond_init(&cond, NULL);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cond_init failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Set up attributes */
+
+  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);
+    }
+
+  /* Start the waiter thread  */
+
+  printf("%s: Starting thread\n", __FUNCTION__);
+  status = pthread_create(waiter, NULL, thread_waiter, (void*)cancelable);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_create failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Make sure that the waiter thread gets a chance to run */
+
+  printf("%s: Yielding\n", __FUNCTION__);
+  pthread_yield();
+
+}
+
+static void restart_thread(pthread_t *waiter, int cancelable)
+{
+  int status;
+
+  /* Destroy the condition variable */
+
+  printf("%s: Destroying cond\n", __FUNCTION__);
+  status = pthread_cond_destroy(&cond);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cond_destroy failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Destroy the mutex */
+
+  printf("%s: Destroying mutex\n", __FUNCTION__);
+  status = pthread_cond_destroy(&cond);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_mutex_destroy failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Then restart the thread */
+
+  printf("%s: Re-starting thread\n", __FUNCTION__);
+  start_thread(waiter, cancelable);
+}
+
+void cancel_test(void)
+{
+  pthread_t waiter;
+  void *result;
+  int status;
+
+  /* Test 1: Normal Cancel *********************************************/
+  /* Start the waiter thread  */
+
+  printf("%s: Test 1: Normal Cancelation\n", __FUNCTION__);
+  printf("%s: Starting thread\n", __FUNCTION__);
+  start_thread(&waiter, 1);
+
+  /* Then cancel it.  It should be in the pthread_cond_wait now */
+
+  printf("%s: Canceling thread\n", __FUNCTION__);
+  status = pthread_cancel(waiter);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cancel failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Then join to the thread to pick up the result */
+
+  printf("%s: Joining\n", __FUNCTION__);
+  status = pthread_join(waiter, &result);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_join failed, status=%d\n", __FUNCTION__, status);
+    }
+  else
+    {
+      printf("%s: waiter exited with result=%p\n", __FUNCTION__, result);
+      if (result != PTHREAD_CANCELED)
+        {
+          printf("%s: ERROR expected result=%p\n", __FUNCTION__, PTHREAD_CANCELED);
+        }
+      else
+        {
+          printf("%s: PASS thread terminated with PTHREAD_CANCELED\n", __FUNCTION__);
+        }
+    }
+
+  /* Test 2: Cancel Detached Thread ************************************/
+
+  printf("%s: Test 2: Cancelation of detached thread\n", __FUNCTION__);
+  printf("%s: Re-starting thread\n", __FUNCTION__);
+  restart_thread(&waiter, 1);
+
+  /* Detach the thread */
+
+  status = pthread_detach(waiter);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_detach, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Then cancel it.  It should be in the pthread_cond_wait now */
+
+  printf("%s: Canceling thread\n", __FUNCTION__);
+  status = pthread_cancel(waiter);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cancel failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Join should now fail */
+
+  printf("%s: Joining\n", __FUNCTION__);
+  status = pthread_join(waiter, &result);
+  if (status == 0)
+    {
+      printf("%s: ERROR pthread_join succeeded\n", __FUNCTION__);
+    }
+  else if (status != ESRCH)
+    {
+      printf("%s: ERROR pthread_join failed but with wrong status=%d\n", __FUNCTION__, status);
+    }
+  else
+    {
+      printf("%s: PASS pthread_join failed with status=ESRCH\n", __FUNCTION__);
+    }
+
+  /* Test 3: Non-cancelable threads ************************************/
+
+  printf("%s: Test 3: Non-cancelable threads\n", __FUNCTION__);
+  printf("%s: Re-starting thread (non-cancelable)\n", __FUNCTION__);
+  restart_thread(&waiter, 0);
+
+  /* Then cancel it.  It should be in the pthread_cond_wait now.  The
+   * behavior here is non-standard:  when the thread is at a cancelation
+   * point, it should be cancelable, even when cancelation is disable.
+   *
+   * The cancelation should succeed, because the cancelation is pending.
+   */
+
+  printf("%s: Canceling thread\n", __FUNCTION__);
+  status = pthread_cancel(waiter);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cancel failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  /* Signal the thread.  It should wake up an restore the cancelable state.
+   * When the cancelable state is re-enabled, the thread should be canceled.
+   */
+
+  status = pthread_mutex_lock(&mutex);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_mutex_lock failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  status = pthread_cond_signal(&cond);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_cond_signal failed, status=%d\n", __FUNCTION__, status);
+    }
+
+  status = pthread_mutex_unlock(&mutex);
+  if (status != 0)
+    {
+      printf("%s: ERROR pthread_mutex_unlock failed, status=%d\n", __FUNCTION__, status);
+    }
+}