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Diffstat (limited to 'nuttx/examples/ostest/sem.c')
-rw-r--r-- | nuttx/examples/ostest/sem.c | 246 |
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 850cf8040b..0000000000 --- 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 -} |