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90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
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#ident "$Id$"
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/*======
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This file is part of PerconaFT.
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Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
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PerconaFT is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2,
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as published by the Free Software Foundation.
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PerconaFT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
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----------------------------------------
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PerconaFT is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License, version 3,
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as published by the Free Software Foundation.
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PerconaFT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
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======= */
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#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
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// check if write locks are fair
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#include <stdio.h>
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#include <toku_assert.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <util/frwlock.h>
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toku_mutex_t rwlock_mutex;
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toku::frwlock rwlock;
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volatile int killed = 0;
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static void *t1_func(void *arg) {
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int i;
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for (i = 0; !killed; i++) {
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toku_mutex_lock(&rwlock_mutex);
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rwlock.write_lock(false);
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toku_mutex_unlock(&rwlock_mutex);
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usleep(10000);
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toku_mutex_lock(&rwlock_mutex);
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rwlock.write_unlock();
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toku_mutex_unlock(&rwlock_mutex);
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}
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printf("%lu %d\n", (unsigned long) pthread_self(), i);
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return arg;
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}
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int main(void) {
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int r;
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toku_mutex_init(&rwlock_mutex, NULL);
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rwlock.init(&rwlock_mutex);
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const int nthreads = 2;
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pthread_t tids[nthreads];
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for (int i = 0; i < nthreads; i++) {
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r = pthread_create(&tids[i], NULL, t1_func, NULL);
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assert(r == 0);
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}
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sleep(10);
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killed = 1;
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for (int i = 0; i < nthreads; i++) {
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void *ret;
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r = pthread_join(tids[i], &ret);
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assert(r == 0);
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}
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rwlock.deinit();
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toku_mutex_destroy(&rwlock_mutex);
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return 0;
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}
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