tor-browser

pipeself.c (6125B)

---

/* -*- 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/. */

/*
* File: pipeself.c
*
* Description:
* This test has two threads communicating with each other using
* two unidirectional pipes.  The primordial thread is the ping
* thread and the other thread is the pong thread.  The ping
* thread writes "ping" to the pong thread and the pong thread
* writes "pong" back.
*/

#include "prio.h"
#include "prerror.h"
#include "prthread.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define NUM_ITERATIONS 10

static PRFileDesc *ping_in, *ping_out;
static PRFileDesc *pong_in, *pong_out;

static void PongThreadFunc(void* arg) {
 char buf[1024];
 int idx;
 PRInt32 nBytes;
 PRStatus status;

 for (idx = 0; idx < NUM_ITERATIONS; idx++) {
   memset(buf, 0, sizeof(buf));
   nBytes = PR_Read(pong_in, buf, sizeof(buf));
   if (nBytes == -1) {
     fprintf(stderr, "PR_Read failed\n");
     exit(1);
   }
   printf("pong thread: received \"%s\"\n", buf);
   if (nBytes != 5) {
     fprintf(stderr, "pong thread: expected 5 bytes but got %d bytes\n",
             nBytes);
     exit(1);
   }
   if (strcmp(buf, "ping") != 0) {
     fprintf(stderr, "pong thread: expected \"ping\" but got \"%s\"\n", buf);
     exit(1);
   }
   strcpy(buf, "pong");
   printf("pong thread: sending \"%s\"\n", buf);
   nBytes = PR_Write(pong_out, buf, 5);
   if (nBytes == -1) {
     fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
             PR_GetOSError());
     exit(1);
   }
 }

 status = PR_Close(pong_in);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
 status = PR_Close(pong_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
}

int main(int argc, char** argv) {
 PRStatus status;
 PRThread* pongThread;
 char buf[1024];
 PRInt32 nBytes;
 int idx;

 status = PR_CreatePipe(&ping_in, &pong_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_CreatePipe failed\n");
   exit(1);
 }
 status = PR_CreatePipe(&pong_in, &ping_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_CreatePipe failed\n");
   exit(1);
 }

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

 for (idx = 0; idx < NUM_ITERATIONS; idx++) {
   strcpy(buf, "ping");
   printf("ping thread: sending \"%s\"\n", buf);
   nBytes = PR_Write(ping_out, buf, 5);
   if (nBytes == -1) {
     fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
             PR_GetOSError());
     exit(1);
   }
   memset(buf, 0, sizeof(buf));
   nBytes = PR_Read(ping_in, buf, sizeof(buf));
   if (nBytes == -1) {
     fprintf(stderr, "PR_Read failed\n");
     exit(1);
   }
   printf("ping thread: received \"%s\"\n", buf);
   if (nBytes != 5) {
     fprintf(stderr, "ping thread: expected 5 bytes but got %d bytes\n",
             nBytes);
     exit(1);
   }
   if (strcmp(buf, "pong") != 0) {
     fprintf(stderr, "ping thread: expected \"pong\" but got \"%s\"\n", buf);
     exit(1);
   }
 }

 status = PR_Close(ping_in);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
 status = PR_Close(ping_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
 status = PR_JoinThread(pongThread);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_JoinThread failed\n");
   exit(1);
 }

#if defined(XP_UNIX)
 /*
  * Test PR_Available for pipes
  */
 status = PR_CreatePipe(&ping_in, &ping_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_CreatePipe failed\n");
   exit(1);
 }
 nBytes = PR_Write(ping_out, buf, 250);
 if (nBytes == -1) {
   fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
           PR_GetOSError());
   exit(1);
 }
 nBytes = PR_Available(ping_in);
 if (nBytes < 0) {
   fprintf(stderr, "PR_Available failed: (%d, %d)\n", PR_GetError(),
           PR_GetOSError());
   exit(1);
 } else if (nBytes != 250) {
   fprintf(stderr, "PR_Available: expected 250 bytes but got %d bytes\n",
           nBytes);
   exit(1);
 }
 printf("PR_Available: expected %d, got %d bytes\n", 250, nBytes);
 /* read some data */
 nBytes = PR_Read(ping_in, buf, 7);
 if (nBytes == -1) {
   fprintf(stderr, "PR_Read failed\n");
   exit(1);
 }
 /* check available data */
 nBytes = PR_Available(ping_in);
 if (nBytes < 0) {
   fprintf(stderr, "PR_Available failed: (%d, %d)\n", PR_GetError(),
           PR_GetOSError());
   exit(1);
 } else if (nBytes != (250 - 7)) {
   fprintf(stderr, "PR_Available: expected 243 bytes but got %d bytes\n",
           nBytes);
   exit(1);
 }
 printf("PR_Available: expected %d, got %d bytes\n", 243, nBytes);
 /* read all data */
 nBytes = PR_Read(ping_in, buf, sizeof(buf));
 if (nBytes == -1) {
   fprintf(stderr, "PR_Read failed\n");
   exit(1);
 } else if (nBytes != 243) {
   fprintf(stderr, "PR_Read failed: expected %d, got %d bytes\n", 243, nBytes);
   exit(1);
 }
 /* check available data */
 nBytes = PR_Available(ping_in);
 if (nBytes < 0) {
   fprintf(stderr, "PR_Available failed: (%d, %d)\n", PR_GetError(),
           PR_GetOSError());
   exit(1);
 } else if (nBytes != 0) {
   fprintf(stderr, "PR_Available: expected 0 bytes but got %d bytes\n",
           nBytes);
   exit(1);
 }
 printf("PR_Available: expected %d, got %d bytes\n", 0, nBytes);

 status = PR_Close(ping_in);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
 status = PR_Close(ping_out);
 if (status == PR_FAILURE) {
   fprintf(stderr, "PR_Close failed\n");
   exit(1);
 }
#endif /* XP_UNIX */

 printf("PASS\n");
 return 0;
}