michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nspr.h"
michael@0: #include "plgetopt.h"
michael@0: 
michael@0: #include <stdio.h>
michael@0: 
michael@0: #define SEM_NAME1 "/tmp/foo.sem"
michael@0: #define SEM_NAME2 "/tmp/bar.sem"
michael@0: #define SEM_MODE  0666
michael@0: #define ITERATIONS 1000
michael@0: 
michael@0: static PRBool debug_mode = PR_FALSE;
michael@0: static PRIntn iterations = ITERATIONS;
michael@0: static PRIntn counter;
michael@0: static PRSem *sem1, *sem2;
michael@0: 
michael@0: /*
michael@0:  * Thread 2 waits on semaphore 2 and posts to semaphore 1.
michael@0:  */
michael@0: void ThreadFunc(void *arg)
michael@0: {
michael@0:     PRIntn i;
michael@0: 
michael@0:     for (i = 0; i < iterations; i++) {
michael@0:         if (PR_WaitSemaphore(sem2) == PR_FAILURE) {
michael@0:             fprintf(stderr, "PR_WaitSemaphore failed\n");
michael@0:             exit(1);
michael@0:         }
michael@0:         if (counter == 2*i+1) {
michael@0:             if (debug_mode) printf("thread 2: counter = %d\n", counter);
michael@0:         } else {
michael@0:             fprintf(stderr, "thread 2: counter should be %d but is %d\n",
michael@0:                     2*i+1, counter);
michael@0:             exit(1);
michael@0:         }
michael@0:         counter++;
michael@0:         if (PR_PostSemaphore(sem1) == PR_FAILURE) {
michael@0:             fprintf(stderr, "PR_PostSemaphore failed\n");
michael@0:             exit(1);
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: static void Help(void)
michael@0: {
michael@0:     fprintf(stderr, "sema test program usage:\n");
michael@0:     fprintf(stderr, "\t-d           debug mode         (FALSE)\n");
michael@0:     fprintf(stderr, "\t-c <count>   loop count         (%d)\n", ITERATIONS);
michael@0:     fprintf(stderr, "\t-h           this message\n");
michael@0: }  /* Help */
michael@0: 
michael@0: int main(int argc, char **argv)
michael@0: {
michael@0:     PRThread *thred;
michael@0:     PRIntn i;
michael@0:     PLOptStatus os;
michael@0:     PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
michael@0: 
michael@0:     while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
michael@0:         if (PL_OPT_BAD == os) continue;
michael@0:         switch (opt->option) {
michael@0:             case 'd':  /* debug mode */
michael@0:                 debug_mode = PR_TRUE;
michael@0:                 break;
michael@0:             case 'c':  /* loop count */
michael@0:                 iterations = atoi(opt->value);
michael@0:                 break;
michael@0:             case 'h':
michael@0:             default:
michael@0:                 Help();
michael@0:                 return 2;
michael@0:         }
michael@0:     }
michael@0:     PL_DestroyOptState(opt);
michael@0: 
michael@0:     if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
michael@0:         fprintf(stderr, "warning: removed semaphore %s left over "
michael@0:                 "from previous run\n", SEM_NAME1);
michael@0:     }
michael@0:     if (PR_DeleteSemaphore(SEM_NAME2) == PR_SUCCESS) {
michael@0:         fprintf(stderr, "warning: removed semaphore %s left over "
michael@0:                 "from previous run\n", SEM_NAME2);
michael@0:     }
michael@0: 
michael@0:     sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 1);
michael@0:     if (NULL == sem1) {
michael@0:         fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
michael@0:                 PR_GetError(), PR_GetOSError());
michael@0:         exit(1);
michael@0:     }
michael@0:     sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 0);
michael@0:     if (NULL == sem2) {
michael@0:         fprintf(stderr, "PR_OpenSemaphore failed\n");
michael@0:         exit(1);
michael@0:     }
michael@0:     thred = PR_CreateThread(PR_USER_THREAD, ThreadFunc, NULL,
michael@0:             PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
michael@0:     if (NULL == thred) {
michael@0:         fprintf(stderr, "PR_CreateThread failed\n");
michael@0:         exit(1);
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:      * Thread 1 waits on semaphore 1 and posts to semaphore 2.
michael@0:      */
michael@0:     for (i = 0; i < iterations; i++) {
michael@0:         if (PR_WaitSemaphore(sem1) == PR_FAILURE) {
michael@0:             fprintf(stderr, "PR_WaitSemaphore failed\n");
michael@0:             exit(1);
michael@0:         }
michael@0:         if (counter == 2*i) {
michael@0:             if (debug_mode) printf("thread 1: counter = %d\n", counter);
michael@0:         } else {
michael@0:             fprintf(stderr, "thread 1: counter should be %d but is %d\n",
michael@0:                     2*i, counter);
michael@0:             exit(1);
michael@0:         }
michael@0:         counter++;
michael@0:         if (PR_PostSemaphore(sem2) == PR_FAILURE) {
michael@0:             fprintf(stderr, "PR_PostSemaphore failed\n");
michael@0:             exit(1);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (PR_JoinThread(thred) == PR_FAILURE) {
michael@0:         fprintf(stderr, "PR_JoinThread failed\n");
michael@0:         exit(1);
michael@0:     }
michael@0: 
michael@0:     if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
michael@0:         fprintf(stderr, "PR_CloseSemaphore failed\n");
michael@0:     }
michael@0:     if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
michael@0:         fprintf(stderr, "PR_CloseSemaphore failed\n");
michael@0:     }
michael@0:     if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
michael@0:         fprintf(stderr, "PR_DeleteSemaphore failed\n");
michael@0:     }
michael@0:     if (PR_DeleteSemaphore(SEM_NAME2) == PR_FAILURE) {
michael@0:         fprintf(stderr, "PR_DeleteSemaphore failed\n");
michael@0:     }
michael@0:     printf("PASS\n");
michael@0:     return 0;
michael@0: }