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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nspr.h"
#include "plgetopt.h"
#include <stdio.h>
#define SHM_NAME "/tmp/counter"
#define SEM_NAME1 "/tmp/foo.sem"
#define SEM_NAME2 "/tmp/bar.sem"
#define EXE_NAME "semapong"
#define SEM_MODE 0666
#define SHM_MODE 0666
#define ITERATIONS 1000
static PRBool debug_mode = PR_FALSE;
static PRIntn iterations = ITERATIONS;
static PRSem *sem1, *sem2;
static void Help(void)
{
fprintf(stderr, "semaping test program usage:\n");
fprintf(stderr, "\t-d debug mode (FALSE)\n");
fprintf(stderr, "\t-c <count> loop count (%d)\n", ITERATIONS);
fprintf(stderr, "\t-h this message\n");
} /* Help */
int main(int argc, char **argv)
{
PRProcess *proc;
PRIntn i;
char *child_argv[32];
char **child_arg;
char iterations_buf[32];
PRSharedMemory *shm;
PRIntn *counter_addr;
PRInt32 exit_code;
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
if (PL_OPT_BAD == os) {
continue;
}
switch (opt->option) {
case 'd': /* debug mode */
debug_mode = PR_TRUE;
break;
case 'c': /* loop count */
iterations = atoi(opt->value);
break;
case 'h':
default:
Help();
return 2;
}
}
PL_DestroyOptState(opt);
if (PR_DeleteSharedMemory(SHM_NAME) == PR_SUCCESS) {
fprintf(stderr, "warning: removed shared memory %s left over "
"from previous run\n", SHM_NAME);
}
if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
fprintf(stderr, "warning: removed semaphore %s left over "
"from previous run\n", SEM_NAME1);
}
if (PR_DeleteSemaphore(SEM_NAME2) == PR_SUCCESS) {
fprintf(stderr, "warning: removed semaphore %s left over "
"from previous run\n", SEM_NAME2);
}
shm = PR_OpenSharedMemory(SHM_NAME, sizeof(*counter_addr), PR_SHM_CREATE, SHM_MODE);
if (NULL == shm) {
fprintf(stderr, "PR_OpenSharedMemory failed (%d, %d)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
counter_addr = PR_AttachSharedMemory(shm, 0);
if (NULL == counter_addr) {
fprintf(stderr, "PR_AttachSharedMemory failed\n");
exit(1);
}
*counter_addr = 0;
sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 1);
if (NULL == sem1) {
fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 0);
if (NULL == sem2) {
fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
child_arg = &child_argv[0];
*child_arg++ = EXE_NAME;
if (debug_mode != PR_FALSE) {
*child_arg++ = "-d";
}
if (iterations != ITERATIONS) {
*child_arg++ = "-c";
PR_snprintf(iterations_buf, sizeof(iterations_buf), "%d", iterations);
*child_arg++ = iterations_buf;
}
*child_arg = NULL;
proc = PR_CreateProcess(child_argv[0], child_argv, NULL, NULL);
if (NULL == proc) {
fprintf(stderr, "PR_CreateProcess failed\n");
exit(1);
}
/*
* Process 1 waits on semaphore 1 and posts to semaphore 2.
*/
for (i = 0; i < iterations; i++) {
if (PR_WaitSemaphore(sem1) == PR_FAILURE) {
fprintf(stderr, "PR_WaitSemaphore failed\n");
exit(1);
}
if (*counter_addr == 2*i) {
if (debug_mode) {
printf("process 1: counter = %d\n", *counter_addr);
}
} else {
fprintf(stderr, "process 1: counter should be %d but is %d\n",
2*i, *counter_addr);
exit(1);
}
(*counter_addr)++;
if (PR_PostSemaphore(sem2) == PR_FAILURE) {
fprintf(stderr, "PR_PostSemaphore failed\n");
exit(1);
}
}
if (PR_DetachSharedMemory(shm, counter_addr) == PR_FAILURE) {
fprintf(stderr, "PR_DetachSharedMemory failed\n");
exit(1);
}
if (PR_CloseSharedMemory(shm) == PR_FAILURE) {
fprintf(stderr, "PR_CloseSharedMemory failed\n");
exit(1);
}
if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
fprintf(stderr, "PR_CloseSemaphore failed\n");
}
if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
fprintf(stderr, "PR_CloseSemaphore failed\n");
}
if (PR_WaitProcess(proc, &exit_code) == PR_FAILURE) {
fprintf(stderr, "PR_WaitProcess failed\n");
exit(1);
}
if (exit_code != 0) {
fprintf(stderr, "process 2 failed with exit code %d\n", exit_code);
exit(1);
}
if (PR_DeleteSharedMemory(SHM_NAME) == PR_FAILURE) {
fprintf(stderr, "PR_DeleteSharedMemory failed\n");
}
if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
fprintf(stderr, "PR_DeleteSemaphore failed\n");
}
if (PR_DeleteSemaphore(SEM_NAME2) == PR_FAILURE) {
fprintf(stderr, "PR_DeleteSemaphore failed\n");
}
printf("PASS\n");
return 0;
}
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