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// tls_test.cc -- test TLS variables for gold, main function

// Copyright 2006, 2007, 2008, 2011 Free Software Foundation, Inc.

// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of gold.

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; either version 3 of the License, or

// (at your option) any later version.

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License

// along with this program; if not, write to the Free Software

// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

// MA 02110-1301, USA.

// This is the main function for the TLS test.  See tls_test.cc for

// more information.

#include <cassert>

#include <cstdio>

#include <pthread.h>

#include <semaphore.h>

#include "tls_test.h"

// We make these macros so the assert() will give useful line-numbers.

#define safe_lock(semptr)                       \

  do                                            \

    {                                           \

      int err = sem_wait(semptr);               \

      assert(err == 0);                          \

    }                                           \

  while (0)

#define safe_unlock(semptr)                     \

  do                                            \

    {                                           \

      int err = sem_post(semptr);               \

      assert(err == 0);                          \

    }                                           \

  while (0)

struct Sem_set

{

  sem_t sem1;

  sem_t sem2;

  sem_t sem3;

};

Sem_set sems1;

Sem_set sems2;

bool failed = false;

void

check(const char* name, bool val)

{

  if (!val)

    {

      fprintf(stderr, "Test %s failed\n", name);

      failed = true;

    }

}

// The body of the thread function.  This acquires the first

// semaphore, runs the tests, and then releases the second semaphore.

// Then it acquires the third semaphore, and the runs the verification

// test again.

void*

thread_routine(void* arg)

{

  Sem_set* pms = static_cast<Sem_set*>(arg);

  // Acquire the first semaphore.

  if (pms)

    safe_lock(&pms->sem1);

  // Run the tests.

  check("t1", t1());

  check("t2", t2());

  check("t3", t3());

  check("t4", t4());

  f5b(f5a());

  check("t5", t5());

  f6b(f6a());

  check("t6", t6());

  check("t8", t8());

  check("t9", t9());

  f10b(f10a());

  check("t10", t10());

  check("t11", t11() != 0);

  check("t12", t12());

  check("t_last", t_last());

  // Release the second semaphore.

  if (pms)

    safe_unlock(&pms->sem2);

  // Acquire the third semaphore.

  if (pms)

    safe_lock(&pms->sem3);

  check("t_last", t_last());

  return 0;

}

// The main function.

int

main()

{

  // First, as a sanity check, run through the tests in the "main" thread.

  thread_routine(0);

  // Set up the semaphores.  We want the first thread to start right

  // away, tell us when it is done with the first part, and wait for

  // us to release it.  We want the second thread to wait to start,

  // tell us when it is done with the first part, and wait for us to

  // release it.

  sem_init(&sems1.sem1, 0, 1);

  sem_init(&sems1.sem2, 0, 0);

  sem_init(&sems1.sem3, 0, 0);

  sem_init(&sems2.sem1, 0, 0);

  sem_init(&sems2.sem2, 0, 0);

  sem_init(&sems2.sem3, 0, 0);

  pthread_t thread1;

  int err = pthread_create(&thread1, NULL, thread_routine, &sems1);

  assert(err == 0);

  pthread_t thread2;

  err = pthread_create(&thread2, NULL, thread_routine, &sems2);

  assert(err == 0);

  // Wait for the first thread to complete the first part.

  safe_lock(&sems1.sem2);

  // Tell the second thread to start.

  safe_unlock(&sems2.sem1);

  // Wait for the second thread to complete the first part.

  safe_lock(&sems2.sem2);

  // Tell the first thread to continue and finish.

  safe_unlock(&sems1.sem3);

  // Wait for the first thread to finish.

  void* thread_val;

  err = pthread_join(thread1, &thread_val);

  assert(err == 0);

  assert(thread_val == 0);

  // Tell the second thread to continue and finish.

  safe_unlock(&sems2.sem3);

  // Wait for the second thread to finish.

  err = pthread_join(thread2, &thread_val);

  assert(err == 0);

  assert(thread_val == 0);

  // All done.

  return failed ? 1 : 0;

}