summaryrefslogtreecommitdiff
path: root/nuttx/examples/ostest/sem.c
diff options
context:
space:
mode:
Diffstat (limited to 'nuttx/examples/ostest/sem.c')
-rw-r--r--nuttx/examples/ostest/sem.c246
1 files changed, 0 insertions, 246 deletions
diff --git a/nuttx/examples/ostest/sem.c b/nuttx/examples/ostest/sem.c
deleted file mode 100644
index 850cf8040..000000000
--- a/nuttx/examples/ostest/sem.c
+++ /dev/null
@@ -1,246 +0,0 @@
-/***********************************************************************
- * sem.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 <pthread.h>
-#include <semaphore.h>
-#include <sched.h>
-#include "ostest.h"
-
-#ifndef NULL
-# define NULL (void*)0
-#endif
-
-static sem_t sem;
-
-static void *waiter_func(void *parameter)
-{
- int id = (int)parameter;
- int status;
- int value;
-
- printf("waiter_func: Thread %d Started\n", id);
-
- /* Take the semaphore */
-
- status = sem_getvalue(&sem, &value);
- if (status < 0)
- {
- printf("waiter_func: ERROR thread %d could not get semaphore value\n", id);
- }
- else
- {
- printf("waiter_func: Thread %d initial semaphore value = %d\n", id, value);
- }
-
- printf("waiter_func: Thread %d waiting on semaphore\n", id);
- status = sem_wait(&sem);
- if (status != 0)
- {
- printf("waiter_func: ERROR thread %d sem_wait failed\n", id);
- }
- printf("waiter_func: Thread %d awakened\n", id);
-
- status = sem_getvalue(&sem, &value);
- if (status < 0)
- {
- printf("waiter_func: ERROR thread %d could not get semaphore value\n", id);
- }
- else
- {
- printf("waiter_func: Thread %d new semaphore value = %d\n", id, value);
- }
-
- printf("waiter_func: Thread %d done\n", id);
- return NULL;
-}
-
-static void *poster_func(void *parameter)
-{
- int id = (int)parameter;
- int status;
- int value;
-
- printf("poster_func: Thread %d started\n", id);
-
- /* Take the semaphore */
-
- do
- {
- status = sem_getvalue(&sem, &value);
- if (status < 0)
- {
- printf("poster_func: ERROR thread %d could not get semaphore value\n", id);
- }
- else
- {
- printf("poster_func: Thread %d semaphore value = %d\n", id, value);
- }
-
- if (value < 0)
- {
- printf("poster_func: Thread %d posting semaphore\n", id);
- status = sem_post(&sem);
- if (status != 0)
- {
- printf("poster_func: ERROR thread %d sem_wait failed\n", id);
- }
-
- pthread_yield();
-
- status = sem_getvalue(&sem, &value);
- if (status < 0)
- {
- printf("poster_func: ERROR thread %d could not get semaphore value\n", id);
- }
- else
- {
- printf("poster_func: Thread %d new semaphore value = %d\n", id, value);
- }
- }
- }
- while (value < 0);
-
- printf("poster_func: Thread %d done\n", id);
- return NULL;
-
-}
-
-void sem_test(void)
-{
- pthread_t waiter_thread1;
- pthread_t waiter_thread2;
- pthread_t poster_thread;
-#ifdef SDCC
- pthread_addr_t result;
-#endif
- struct sched_param sparam;
- int prio_min;
- int prio_max;
- int prio_mid;
- pthread_attr_t attr;
- int status;
-
- printf("sem_test: Initializing semaphore to 0\n");
- sem_init(&sem, 0, 0);
-
- /* Start two waiter thread instances */
-
- printf("sem_test: Starting waiter thread 1\n");
- status = pthread_attr_init(&attr);
- if (status != OK)
- {
- printf("sem_test: pthread_attr_init failed, status=%d\n", 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 + prio_max) / 2;
- status = pthread_attr_setschedparam(&attr,&sparam);
- if (status != OK)
- {
- printf("sem_test: pthread_attr_setschedparam failed, status=%d\n", status);
- }
- else
- {
- printf("sem_test: Set thread 1 priority to %d\n", sparam.sched_priority);
- }
-
- status = pthread_create(&waiter_thread1, &attr, waiter_func, (pthread_addr_t)1);
- if (status != 0)
- {
- printf("sem_test: Error in thread 1 creation, status=%d\n", status);
- }
-
- printf("sem_test: Starting waiter thread 2\n");
- status = pthread_attr_init(&attr);
- if (status != 0)
- {
- printf("sem_test: pthread_attr_init failed, status=%d\n", status);
- }
-
- sparam.sched_priority = prio_mid;
- status = pthread_attr_setschedparam(&attr,&sparam);
- if (status != OK)
- {
- printf("sem_test: pthread_attr_setschedparam failed, status=%d\n", status);
- }
- else
- {
- printf("sem_test: Set thread 2 priority to %d\n", sparam.sched_priority);
- }
-
- status = pthread_create(&waiter_thread2, &attr, waiter_func, (pthread_addr_t)2);
- if (status != 0)
- {
- printf("sem_test: Error in thread 2 creation, status=%d\n", status);
- }
-
- printf("sem_test: Starting poster thread 3\n");
- status = pthread_attr_init(&attr);
- if (status != 0)
- {
- printf("sem_test: pthread_attr_init failed, status=%d\n", status);
- }
-
- sparam.sched_priority = (prio_min + prio_mid) / 2;
- status = pthread_attr_setschedparam(&attr,&sparam);
- if (status != OK)
- {
- printf("sem_test: pthread_attr_setschedparam failed, status=%d\n", status);
- }
- else
- {
- printf("sem_test: Set thread 3 priority to %d\n", sparam.sched_priority);
- }
-
- status = pthread_create(&poster_thread, &attr, poster_func, (pthread_addr_t)3);
- if (status != 0)
- {
- printf("sem_test: Error in thread 3 creation, status=%d\n", status);
- }
-
-#ifdef SDCC
- pthread_join(waiter_thread1, &result);
- pthread_join(waiter_thread2, &result);
- pthread_join(poster_thread, &result);
-#else
- pthread_join(waiter_thread1, NULL);
- pthread_join(waiter_thread2, NULL);
- pthread_join(poster_thread, NULL);
-#endif
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 23:35:14 +0000