/* -*- 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:        intrio.c
 * Purpose:     testing i/o interrupts (see Bugzilla bug #31120)
 */

#include "nspr.h"

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

/* for synchronization between the main thread and iothread */
static PRLock* lock;
static PRCondVar* cvar;
static PRBool iothread_ready;

static void PR_CALLBACK AbortIO(void* arg) {
  PRStatus rv;
  PR_Sleep(PR_SecondsToInterval(2));
  rv = PR_Interrupt((PRThread*)arg);
  PR_ASSERT(PR_SUCCESS == rv);
} /* AbortIO */

static void PR_CALLBACK IOThread(void* arg) {
  PRFileDesc *sock, *newsock;
  PRNetAddr addr;

  sock = PR_OpenTCPSocket(PR_AF_INET6);
  if (sock == NULL) {
    fprintf(stderr, "PR_OpenTCPSocket failed\n");
    exit(1);
  }
  memset(&addr, 0, sizeof(addr));
  if (PR_SetNetAddr(PR_IpAddrAny, PR_AF_INET6, 0, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_SetNetAddr failed\n");
    exit(1);
  }
  if (PR_Bind(sock, &addr) == PR_FAILURE) {
    fprintf(stderr, "PR_Bind failed\n");
    exit(1);
  }
  if (PR_Listen(sock, 5) == PR_FAILURE) {
    fprintf(stderr, "PR_Listen failed\n");
    exit(1);
  }
  /* tell the main thread that we are ready */
  PR_Lock(lock);
  iothread_ready = PR_TRUE;
  PR_NotifyCondVar(cvar);
  PR_Unlock(lock);
  newsock = PR_Accept(sock, NULL, PR_INTERVAL_NO_TIMEOUT);
  if (newsock != NULL) {
    fprintf(stderr, "PR_Accept shouldn't have succeeded\n");
    exit(1);
  }
  if (PR_GetError() != PR_PENDING_INTERRUPT_ERROR) {
    fprintf(stderr, "PR_Accept failed (%d, %d)\n", PR_GetError(),
            PR_GetOSError());
    exit(1);
  }
  printf("PR_Accept() is interrupted as expected\n");
  if (PR_Close(sock) == PR_FAILURE) {
    fprintf(stderr, "PR_Close failed\n");
    exit(1);
  }
}

static void Test(PRThreadScope scope1, PRThreadScope scope2) {
  PRThread *iothread, *abortio;

  printf("A %s thread will be interrupted by a %s thread\n",
         (scope1 == PR_LOCAL_THREAD ? "local" : "global"),
         (scope2 == PR_LOCAL_THREAD ? "local" : "global"));
  iothread_ready = PR_FALSE;
  iothread = PR_CreateThread(PR_USER_THREAD, IOThread, NULL, PR_PRIORITY_NORMAL,
                             scope1, PR_JOINABLE_THREAD, 0);
  if (iothread == NULL) {
    fprintf(stderr, "cannot create thread\n");
    exit(1);
  }
  PR_Lock(lock);
  while (!iothread_ready) {
    PR_WaitCondVar(cvar, PR_INTERVAL_NO_TIMEOUT);
  }
  PR_Unlock(lock);
  abortio = PR_CreateThread(PR_USER_THREAD, AbortIO, iothread,
                            PR_PRIORITY_NORMAL, scope2, PR_JOINABLE_THREAD, 0);
  if (abortio == NULL) {
    fprintf(stderr, "cannot create thread\n");
    exit(1);
  }
  if (PR_JoinThread(iothread) == PR_FAILURE) {
    fprintf(stderr, "PR_JoinThread failed\n");
    exit(1);
  }
  if (PR_JoinThread(abortio) == PR_FAILURE) {
    fprintf(stderr, "PR_JoinThread failed\n");
    exit(1);
  }
}

int main(int argc, char** argv) {
  PR_STDIO_INIT();
  lock = PR_NewLock();
  if (lock == NULL) {
    fprintf(stderr, "PR_NewLock failed\n");
    exit(1);
  }
  cvar = PR_NewCondVar(lock);
  if (cvar == NULL) {
    fprintf(stderr, "PR_NewCondVar failed\n");
    exit(1);
  }
  /* test all four combinations */
  Test(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
  Test(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
  Test(PR_GLOBAL_THREAD, PR_LOCAL_THREAD);
  Test(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
  printf("PASSED\n");
  return 0;
} /* main */
