summaryrefslogtreecommitdiff
path: root/apps/examples/ostest/cancel.c
diff options
context:
space:
mode:
Diffstat (limited to 'apps/examples/ostest/cancel.c')
-rw-r--r--apps/examples/ostest/cancel.c333
1 files changed, 333 insertions, 0 deletions
diff --git a/apps/examples/ostest/cancel.c b/apps/examples/ostest/cancel.c
new file mode 100644
index 000000000..bf2d03615
--- /dev/null
+++ b/apps/examples/ostest/cancel.c
@@ -0,0 +1,333 @@
+/***********************************************************************
+ * examples/ostest/cancel.c
+ *
+ * Copyright (C) 2007-2009 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 NuttX 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("thread_waiter: Taking mutex\n");
+ status = pthread_mutex_lock(&mutex);
+ if (status != 0)
+ {
+ printf("thread_waiter: ERROR pthread_mutex_lock failed, status=%d\n", status);
+ }
+
+ printf("thread_waiter: Starting wait for condition\n");
+
+ /* Are we a non-cancelable thread? Yes, set the non-cancelable state */
+
+ if (!parameter)
+ {
+ printf("thread_waiter: Setting non-cancelable\n");
+ status = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+ if (status != 0)
+ {
+ printf("thread_waiter: ERROR pthread_setcancelstate failed, status=%d\n", status);
+ }
+ }
+
+ /* The wait -- we will never awaken from this. */
+
+ status = pthread_cond_wait(&cond, &mutex);
+ if (status != 0)
+ {
+ printf("thread_waiter: ERROR pthread_cond_wait failed, status=%d\n", status);
+ }
+
+ /* Release the mutex */
+
+ printf("thread_waiter: Releasing mutex\n");
+ status = pthread_mutex_unlock(&mutex);
+ if (status != 0)
+ {
+ printf("thread_waiter: ERROR pthread_mutex_unlock failed, status=%d\n", status);
+ }
+
+ /* Set the cancelable state */
+
+ printf("thread_waiter: Setting cancelable\n");
+ status = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+ if (status != 0)
+ {
+ printf("thread_waiter: ERROR pthread_setcancelstate failed, status=%d\n", status);
+ }
+
+ printf("thread_waiter: Exit with status 0x12345678\n");
+ pthread_exit((pthread_addr_t)0x12345678);
+ return NULL;
+}
+
+static void start_thread(pthread_t *waiter, int cancelable)
+{
+ pthread_attr_t attr;
+ int status;
+
+ /* Initialize the mutex */
+
+ printf("start_thread: Initializing mutex\n");
+ status = pthread_mutex_init(&mutex, NULL);
+ if (status != 0)
+ {
+ printf("start_thread: ERROR pthread_mutex_init failed, status=%d\n", status);
+ }
+
+ /* Initialize the condition variable */
+
+ printf("start_thread: Initializing cond\n");
+ status = pthread_cond_init(&cond, NULL);
+ if (status != 0)
+ {
+ printf("start_thread: ERROR pthread_cond_init failed, status=%d\n", status);
+ }
+
+ /* Set up attributes */
+
+ status = pthread_attr_init(&attr);
+ if (status != 0)
+ {
+ printf("start_thread: pthread_attr_init failed, status=%d\n", status);
+ }
+
+ status = pthread_attr_setstacksize(&attr, STACKSIZE);
+ if (status != 0)
+ {
+ printf("start_thread: pthread_attr_setstacksize failed, status=%d\n", status);
+ }
+
+ /* Start the waiter thread */
+
+ printf("start_thread: Starting thread\n");
+ status = pthread_create(waiter, &attr, thread_waiter, (pthread_addr_t)cancelable);
+ if (status != 0)
+ {
+ printf("start_thread: ERROR pthread_create failed, status=%d\n", status);
+ }
+
+ /* Make sure that the waiter thread gets a chance to run */
+
+ printf("start_thread: Yielding\n");
+ pthread_yield();
+}
+
+static void restart_thread(pthread_t *waiter, int cancelable)
+{
+ int status;
+
+ /* Destroy the condition variable */
+
+ printf("restart_thread: Destroying cond\n");
+ status = pthread_cond_destroy(&cond);
+ if (status != 0)
+ {
+ printf("restart_thread: ERROR pthread_cond_destroy failed, status=%d\n", status);
+ }
+
+ /* Destroy the mutex */
+
+ printf("restart_thread: Destroying mutex\n");
+ status = pthread_cond_destroy(&cond);
+ if (status != 0)
+ {
+ printf("restart_thread: ERROR pthread_mutex_destroy failed, status=%d\n", status);
+ }
+
+ /* Then restart the thread */
+
+ printf("restart_thread: Re-starting thread\n");
+ start_thread(waiter, cancelable);
+}
+
+void cancel_test(void)
+{
+ pthread_t waiter;
+ void *result;
+ int status;
+
+ /* Test 1: Normal Cancel *********************************************/
+ /* Start the waiter thread */
+
+ printf("cancel_test: Test 1: Normal Cancelation\n");
+ printf("cancel_test: Starting thread\n");
+ start_thread(&waiter, 1);
+
+ /* Then cancel it. It should be in the pthread_cond_wait now */
+
+ printf("cancel_test: Canceling thread\n");
+ status = pthread_cancel(waiter);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_cancel failed, status=%d\n", status);
+ }
+
+ /* Then join to the thread to pick up the result (if we don't do
+ * we will have a memory leak!)
+ */
+
+ printf("cancel_test: Joining\n");
+ status = pthread_join(waiter, &result);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_join failed, status=%d\n", status);
+ }
+ else
+ {
+ printf("cancel_test: waiter exited with result=%p\n", result);
+ if (result != PTHREAD_CANCELED)
+ {
+ printf("cancel_test: ERROR expected result=%p\n", PTHREAD_CANCELED);
+ }
+ else
+ {
+ printf("cancel_test: PASS thread terminated with PTHREAD_CANCELED\n");
+ }
+ }
+
+ /* Test 2: Cancel Detached Thread ************************************/
+
+ printf("cancel_test: Test 2: Cancelation of detached thread\n");
+ printf("cancel_test: Re-starting thread\n");
+ restart_thread(&waiter, 1);
+
+ /* Detach the thread */
+
+ status = pthread_detach(waiter);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_detach, status=%d\n", status);
+ }
+
+ /* Then cancel it. It should be in the pthread_cond_wait now */
+
+ printf("cancel_test: Canceling thread\n");
+ status = pthread_cancel(waiter);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_cancel failed, status=%d\n", status);
+ }
+
+ /* Join should now fail */
+
+ printf("cancel_test: Joining\n");
+ status = pthread_join(waiter, &result);
+ if (status == 0)
+ {
+ printf("cancel_test: ERROR pthread_join succeeded\n");
+ }
+ else if (status != ESRCH)
+ {
+ printf("cancel_test: ERROR pthread_join failed but with wrong status=%d\n", status);
+ }
+ else
+ {
+ printf("cancel_test: PASS pthread_join failed with status=ESRCH\n");
+ }
+
+ /* Test 3: Non-cancelable threads ************************************/
+
+ printf("cancel_test: Test 3: Non-cancelable threads\n");
+ printf("cancel_test: Re-starting thread (non-cancelable)\n");
+ 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("cancel_test: Canceling thread\n");
+ status = pthread_cancel(waiter);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_cancel failed, status=%d\n", status);
+ }
+
+ /* Signal the thread. It should wake up and 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("cancel_test: ERROR pthread_mutex_lock failed, status=%d\n", status);
+ }
+
+ status = pthread_cond_signal(&cond);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_cond_signal failed, status=%d\n", status);
+ }
+
+ status = pthread_mutex_unlock(&mutex);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_mutex_unlock failed, status=%d\n", status);
+ }
+
+ /* Then join to the thread to pick up the result (if we don't do
+ * we will have a memory leak!)
+ */
+
+ printf("cancel_test: Joining\n");
+ status = pthread_join(waiter, &result);
+ if (status != 0)
+ {
+ printf("cancel_test: ERROR pthread_join failed, status=%d\n", status);
+ }
+ else
+ {
+ printf("cancel_test: waiter exited with result=%p\n", result);
+ if (result != PTHREAD_CANCELED)
+ {
+ printf("cancel_test: ERROR expected result=%p\n", PTHREAD_CANCELED);
+ }
+ else
+ {
+ printf("cancel_test: PASS thread terminated with PTHREAD_CANCELED\n");
+ }
+ }
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 15:03:42 +0000