From 1578974ee8aac9a58a2c91c0253883a4dbeca168 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Fri, 26 Sep 2014 07:04:34 -0600 Subject: Add a trivial test of sem_timedwait() to the OS test --- apps/examples/ostest/semtimed.c | 229 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 229 insertions(+) create mode 100644 apps/examples/ostest/semtimed.c (limited to 'apps/examples/ostest/semtimed.c') diff --git a/apps/examples/ostest/semtimed.c b/apps/examples/ostest/semtimed.c new file mode 100644 index 000000000..447f97cc5 --- /dev/null +++ b/apps/examples/ostest/semtimed.c @@ -0,0 +1,229 @@ +/*********************************************************************** + * apps/examples/ostest/semtimed.c + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ***********************************************************************/ + +/*********************************************************************** + * Included Files + ***********************************************************************/ + +#include +#include +#include +#include +#include +#include + +#include "ostest.h" + +/*********************************************************************** + * Preprocessor Definitions + ***********************************************************************/ + +#ifndef NULL +# define NULL (void*)0 +#endif + +/*********************************************************************** + * Private Data + ***********************************************************************/ + +static sem_t sem; + +/*********************************************************************** + * Private Functions + ***********************************************************************/ + +static void *poster_func(void *parameter) +{ + /* Wait for one second, then post the semaphore */ + + printf("poster_func: Waiting for 1 second\n"); + sleep(1); + printf("poster_func: Posting\n"); + sem_post(&sem); + return NULL; +} + +/*********************************************************************** + * Public Functions + ***********************************************************************/ + +void semtimed_test(void) +{ + pthread_t poster_thread = (pthread_t)0; +#ifdef SDCC + pthread_addr_t result; +#endif + struct sched_param sparam; + struct timespec abstime; + struct timespec before; + struct timespec after; + int prio_min; + int prio_max; + int prio_mid; + pthread_attr_t attr; + int status; + + printf("semtimed_test: Initializing semaphore to 0\n"); + sem_init(&sem, 0, 0); + + /* First, make sure that the timeout expires if the semaphore is never posted */ + + (void)clock_gettime(CLOCK_REALTIME, &before); + + abstime.tv_sec = before.tv_sec + 2; + abstime.tv_nsec = before.tv_nsec; + + printf("semtimed_test: Waiting for two second timeout\n"); + status = sem_timedwait(&sem, &abstime); + (void)clock_gettime(CLOCK_REALTIME, &after); + + if (status == OK) + { + printf("semtimed_test: ERROR: sem_timedwait succeeded\n"); + } + else + { + int errcode = errno; + if (errcode == ETIMEDOUT) + { + printf("samwait_test: PASS\n"); + } + else + { + printf("semtimed_test: ERROR: sem_timedwait failed with: %d\n", errcode); + } + } + + (void)clock_gettime(CLOCK_REALTIME, &after); + printf("BEFORE: (%lu sec, %lu nsec)\n", + (unsigned long)before.tv_sec, (unsigned long)before.tv_nsec); + printf("AFTER: (%lu sec, %lu nsec)\n", + (unsigned long)after.tv_sec, (unsigned long)after.tv_nsec); + + /* Now make sure that the time wait returns successfully if the semaphore is posted */ + /* Start a poster thread. It will wait 1 seconds and post the semaphore */ + + printf("semtimed_test: Starting poster thread\n"); + status = pthread_attr_init(&attr); + if (status != OK) + { + printf("semtimed_test: ERROR: 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("semtimed_test: ERROR: pthread_attr_setschedparam failed, status=%d\n", status); + } + else + { + printf("semtimed_test: Set thread 1 priority to %d\n", sparam.sched_priority); + } + + + printf("semtimed_test: Starting poster thread 3\n"); + status = pthread_attr_init(&attr); + if (status != 0) + { + printf("semtimed_test: ERROR: 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("semtimed_test: pthread_attr_setschedparam failed, status=%d\n", status); + } + else + { + printf("semtimed_test: Set thread 3 priority to %d\n", sparam.sched_priority); + } + + status = pthread_create(&poster_thread, &attr, poster_func, NULL); + if (status != 0) + { + printf("semtimed_test: ERROR: Poster thread creation failed: %d\n", status); + sem_destroy(&sem); + return; + } + + /* Up to two seconds for the semaphore to be posted */ + + (void)clock_gettime(CLOCK_REALTIME, &before); + + abstime.tv_sec = before.tv_sec + 2; + abstime.tv_nsec = before.tv_nsec; + + printf("semtimed_test: Waiting for two second timeout\n"); + status = sem_timedwait(&sem, &abstime); + (void)clock_gettime(CLOCK_REALTIME, &after); + + if (status < 0) + { + int errcode = errno; + printf("semtimed_test: ERROR: sem_timedwait failed with: %d\n", errcode); + } + else + { + printf("semtimed_test: PASS: sem_timedwait succeeded\n"); + } + + (void)clock_gettime(CLOCK_REALTIME, &after); + printf("BEFORE: (%lu sec, %lu nsec)\n", + (unsigned long)before.tv_sec, (unsigned long)before.tv_nsec); + printf("AFTER: (%lu sec, %lu nsec)\n", + (unsigned long)after.tv_sec, (unsigned long)after.tv_nsec); + + + /* Clean up detritus left by the pthread */ + +#ifdef SDCC + if (poster_thread != (pthread_t)0) + { + pthread_join(poster_thread, &result); + } +#else + if (poster_thread != (pthread_t)0) + { + pthread_join(poster_thread, NULL); + } +#endif + sem_destroy(&sem); +} -- cgit v1.2.3