2dfb5847f3
Doing a 32 bit modulo is really slow on wsn430, even when changing to a power of two modulo. Replace modulo by a double counter.
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/*
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* Copyright (C) 2014-2017 HAW Hamburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief simple test application for atomic mutex unlocking and sleeping
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*
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* @author Martin Landsmann <martin.landsmann@haw-hamburg.de>
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* @author Sebastian Meiling <s@mlng.net>
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* @}
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*/
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#include <stdio.h>
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#include "thread.h"
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#include "mutex.h"
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static mutex_t mutex = MUTEX_INIT;
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static volatile int indicator;
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static kernel_pid_t main_pid;
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static char stack[THREAD_STACKSIZE_DEFAULT];
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static const unsigned KITERATIONS = 100;
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static void *second_thread(void *arg)
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{
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(void) arg;
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while (1) {
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mutex_lock(&mutex);
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thread_wakeup(main_pid);
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indicator--;
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mutex_unlock_and_sleep(&mutex);
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}
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return NULL;
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}
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int main(void)
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{
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uint32_t count = 0;
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uint32_t kcount = 0;
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indicator = 0;
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main_pid = thread_getpid();
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kernel_pid_t second_pid = thread_create(stack,
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sizeof(stack),
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THREAD_PRIORITY_MAIN - 1,
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THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
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second_thread,
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NULL,
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"second_thread");
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while (1) {
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mutex_lock(&mutex);
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thread_wakeup(second_pid);
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indicator++;
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count++;
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if ((indicator > 1) || (indicator < -1)) {
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printf("[ERROR] threads did not sleep properly (%d).\n", indicator);
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return 1;
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}
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if (count == (KITERATIONS * 1000)) {
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count = 0;
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kcount += KITERATIONS;
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printf("[ALIVE] alternated %"PRIu32"k times.\n", kcount);
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}
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mutex_unlock_and_sleep(&mutex);
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}
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}
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