tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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ioconthr.c (3384B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 * This is a test for the io continuation thread machinery
      8 * in pthreads.
      9 */
     10 
     11 #include "nspr.h"
     12 #include <stdio.h>
     13 
     14 int num_threads = 10; /* must be an even number */
     15 PRThreadScope thread_scope = PR_GLOBAL_THREAD;
     16 
     17 void ThreadFunc(void* arg) {
     18  PRFileDesc* fd = (PRFileDesc*)arg;
     19  char buf[1024];
     20  PRInt32 nbytes;
     21  PRErrorCode err;
     22 
     23  nbytes = PR_Recv(fd, buf, sizeof(buf), 0, PR_SecondsToInterval(20));
     24  if (nbytes == -1) {
     25    err = PR_GetError();
     26    if (err != PR_PENDING_INTERRUPT_ERROR) {
     27      fprintf(stderr, "PR_Recv failed: (%d, %d)\n", err, PR_GetOSError());
     28      PR_ProcessExit(1);
     29    }
     30    /*
     31     * After getting an I/O interrupt, this thread must
     32     * close the fd before it exits due to a limitation
     33     * of our NT implementation.
     34     */
     35    if (PR_Close(fd) == PR_FAILURE) {
     36      fprintf(stderr, "PR_Close failed\n");
     37      PR_ProcessExit(1);
     38    }
     39  } else {
     40    fprintf(stderr, "PR_Recv received %d bytes!?\n", nbytes);
     41    PR_ProcessExit(1);
     42  }
     43 }
     44 
     45 int main(int argc, char** argv) {
     46  PRFileDesc** fds;
     47  PRThread** threads;
     48  PRIntervalTime start, elapsed;
     49  int index;
     50 
     51  fds = (PRFileDesc**)PR_MALLOC(2 * num_threads * sizeof(PRFileDesc*));
     52  PR_ASSERT(fds != NULL);
     53  threads = (PRThread**)PR_MALLOC(num_threads * sizeof(PRThread*));
     54  PR_ASSERT(threads != NULL);
     55 
     56  for (index = 0; index < num_threads; index++) {
     57    if (PR_NewTCPSocketPair(&fds[2 * index]) == PR_FAILURE) {
     58      fprintf(stderr, "PR_NewTCPSocket failed\n");
     59      PR_ProcessExit(1);
     60    }
     61    threads[index] = PR_CreateThread(PR_USER_THREAD, ThreadFunc, fds[2 * index],
     62                                     PR_PRIORITY_NORMAL, thread_scope,
     63                                     PR_JOINABLE_THREAD, 0);
     64    if (NULL == threads[index]) {
     65      fprintf(stderr, "PR_CreateThread failed\n");
     66      PR_ProcessExit(1);
     67    }
     68  }
     69 
     70  /* Let the threads block in PR_Recv */
     71  PR_Sleep(PR_SecondsToInterval(2));
     72 
     73  printf("Interrupting the threads\n");
     74  fflush(stdout);
     75  start = PR_IntervalNow();
     76  for (index = 0; index < num_threads; index++) {
     77    if (PR_Interrupt(threads[index]) == PR_FAILURE) {
     78      fprintf(stderr, "PR_Interrupt failed\n");
     79      PR_ProcessExit(1);
     80    }
     81  }
     82  for (index = 0; index < num_threads; index++) {
     83    if (PR_JoinThread(threads[index]) == PR_FAILURE) {
     84      fprintf(stderr, "PR_JoinThread failed\n");
     85      PR_ProcessExit(1);
     86    }
     87  }
     88  elapsed = (PRIntervalTime)(PR_IntervalNow() - start);
     89  printf("Threads terminated in %d milliseconds\n",
     90         PR_IntervalToMilliseconds(elapsed));
     91  fflush(stdout);
     92 
     93  /* We are being very generous and allow 10 seconds. */
     94  if (elapsed >= PR_SecondsToInterval(10)) {
     95    fprintf(stderr, "Interrupting threads took longer than 10 seconds!!\n");
     96    PR_ProcessExit(1);
     97  }
     98 
     99  for (index = 0; index < num_threads; index++) {
    100    /* fds[2 * index] was passed to and closed by threads[index]. */
    101    if (PR_Close(fds[2 * index + 1]) == PR_FAILURE) {
    102      fprintf(stderr, "PR_Close failed\n");
    103      PR_ProcessExit(1);
    104    }
    105  }
    106  PR_DELETE(threads);
    107  PR_DELETE(fds);
    108  printf("PASS\n");
    109  PR_Cleanup();
    110  return 0;
    111 }