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cdef20bb66
adjust clang-format options to get closer to ISC style See merge request isc-projects/bind9!3061 (cherry picked from commitd3b49b6675)0255a974revise .clang-format and add a C formatting script in utile851ed0bapply the modified style
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <isc/print.h>
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#include <isc/rwlock.h>
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#include <isc/string.h>
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#include <isc/thread.h>
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#include <isc/util.h>
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#ifdef WIN32
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#define sleep(x) Sleep(1000 * x)
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#endif /* ifdef WIN32 */
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isc_rwlock_t lock;
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static isc_threadresult_t
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#ifdef WIN32
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WINAPI
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#endif /* ifdef WIN32 */
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run1(void *arg) {
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char *message = arg;
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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printf("%s got READ lock\n", message);
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sleep(1);
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printf("%s giving up READ lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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printf("%s got READ lock\n", message);
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sleep(1);
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printf("%s giving up READ lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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printf("%s got WRITE lock\n", message);
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sleep(1);
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printf("%s giving up WRITE lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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return ((isc_threadresult_t)0);
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}
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static isc_threadresult_t
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#ifdef WIN32
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WINAPI
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#endif /* ifdef WIN32 */
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run2(void *arg) {
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char *message = arg;
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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printf("%s got WRITE lock\n", message);
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sleep(1);
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printf("%s giving up WRITE lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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printf("%s got WRITE lock\n", message);
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sleep(1);
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printf("%s giving up WRITE lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
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ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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printf("%s got READ lock\n", message);
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sleep(1);
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printf("%s giving up READ lock\n", message);
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RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
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ISC_R_SUCCESS);
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return ((isc_threadresult_t)0);
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}
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int
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main(int argc, char *argv[]) {
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unsigned int nworkers;
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unsigned int i;
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isc_thread_t workers[100];
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char name[100];
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void *dupname;
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if (argc > 1) {
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nworkers = atoi(argv[1]);
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} else {
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nworkers = 2;
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}
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if (nworkers > 100) {
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nworkers = 100;
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}
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printf("%u workers\n", nworkers);
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RUNTIME_CHECK(isc_rwlock_init(&lock, 5, 10) == ISC_R_SUCCESS);
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for (i = 0; i < nworkers; i++) {
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snprintf(name, sizeof(name), "%02u", i);
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dupname = strdup(name);
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RUNTIME_CHECK(dupname != NULL);
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if (i != 0 && i % 3 == 0) {
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isc_thread_create(run1, dupname, &workers[i]);
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} else {
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isc_thread_create(run2, dupname, &workers[i]);
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}
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}
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for (i = 0; i < nworkers; i++) {
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isc_thread_join(workers[i], NULL);
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}
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isc_rwlock_destroy(&lock);
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return (0);
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}
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