//===-- ProcessRunLock.cpp ------------------------------------------------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef _WIN32

#include "lldb/Host/ProcessRunLock.h"

namespace lldb_private {

ProcessRunLock::ProcessRunLock() {

  int err = ::pthread_rwlock_init(&m_rwlock, nullptr);

  (void)err;

}

ProcessRunLock::~ProcessRunLock() {

  int err = ::pthread_rwlock_destroy(&m_rwlock);

  (void)err;

}

bool ProcessRunLock::ReadTryLock() {

  ::pthread_rwlock_rdlock(&m_rwlock);

  if (!m_running) {

    // coverity[missing_unlock]

    return true;

  }

  ::pthread_rwlock_unlock(&m_rwlock);

  return false;

}

bool ProcessRunLock::ReadUnlock() {

  return ::pthread_rwlock_unlock(&m_rwlock) == 0;

}

bool ProcessRunLock::SetRunning() {

  ::pthread_rwlock_wrlock(&m_rwlock);

  m_running = true;

  ::pthread_rwlock_unlock(&m_rwlock);

  return true;

}

bool ProcessRunLock::TrySetRunning() {

  bool r;

  if (::pthread_rwlock_trywrlock(&m_rwlock) == 0) {

    r = !m_running;

    m_running = true;

    ::pthread_rwlock_unlock(&m_rwlock);

    return r;

  }

  return false;

}

bool ProcessRunLock::SetStopped() {

  ::pthread_rwlock_wrlock(&m_rwlock);

  m_running = false;

  ::pthread_rwlock_unlock(&m_rwlock);

  return true;

}

}

#endif