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lightning-sunbird  0.9+nobinonly
Defines | Functions | Variables
sema.c File Reference
#include "nspr.h"
#include "plgetopt.h"
#include <stdio.h>

Go to the source code of this file.

Defines

#define SEM_NAME1   "/tmp/foo.sem"
#define SEM_NAME2   "/tmp/bar.sem"
#define SEM_MODE   0666
#define ITERATIONS   1000

Functions

void ThreadFunc (void *arg)
static void Help (void)
int main (int argc, char **argv)
 The Xalan testcases app.

Variables

static PRBool debug_mode = PR_FALSE
static PRIntn iterations = ITERATIONS
static PRIntn counter
static PRSemsem1
static PRSemsem2

Define Documentation

#define ITERATIONS   1000

Definition at line 46 of file sema.c.

#define SEM_MODE   0666

Definition at line 45 of file sema.c.

#define SEM_NAME1   "/tmp/foo.sem"

Definition at line 43 of file sema.c.

#define SEM_NAME2   "/tmp/bar.sem"

Definition at line 44 of file sema.c.


Function Documentation

static void Help ( void  ) [static]

Definition at line 80 of file sema.c.

{
    fprintf(stderr, "sema 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 */

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int main ( int  argc,
char **  argv 
)

The Xalan testcases app.

Definition at line 88 of file sema.c.

{
    PRThread *thred;
    PRIntn i;
    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_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);
    }

    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\n");
        exit(1);
    }
    thred = PR_CreateThread(PR_USER_THREAD, ThreadFunc, NULL,
            PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
    if (NULL == thred) {
        fprintf(stderr, "PR_CreateThread failed\n");
        exit(1);
    }

    /*
     * Thread 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 == 2*i) {
            if (debug_mode) printf("thread 1: counter = %d\n", counter);
        } else {
            fprintf(stderr, "thread 1: counter should be %d but is %d\n",
                    2*i, counter);
            exit(1);
        }
        counter++;
        if (PR_PostSemaphore(sem2) == PR_FAILURE) {
            fprintf(stderr, "PR_PostSemaphore failed\n");
            exit(1);
        }
    }

    if (PR_JoinThread(thred) == PR_FAILURE) {
        fprintf(stderr, "PR_JoinThread 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_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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void ThreadFunc ( void arg)

Definition at line 56 of file sema.c.

{
    PRIntn i;

    for (i = 0; i < iterations; i++) {
        if (PR_WaitSemaphore(sem2) == PR_FAILURE) {
            fprintf(stderr, "PR_WaitSemaphore failed\n");
            exit(1);
        }
        if (counter == 2*i+1) {
            if (debug_mode) printf("thread 2: counter = %d\n", counter);
        } else {
            fprintf(stderr, "thread 2: counter should be %d but is %d\n",
                    2*i+1, counter);
            exit(1);
        }
        counter++;
        if (PR_PostSemaphore(sem1) == PR_FAILURE) {
            fprintf(stderr, "PR_PostSemaphore failed\n");
            exit(1);
        }
    }
}

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Variable Documentation

PRIntn counter [static]

Definition at line 50 of file sema.c.

Definition at line 48 of file sema.c.

PRIntn iterations = ITERATIONS [static]

Definition at line 49 of file sema.c.

PRSem* sem1 [static]

Definition at line 51 of file sema.c.

PRSem * sem2 [static]

Definition at line 51 of file sema.c.