//

// Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved.

// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

//

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

// under the terms of the GNU General Public License version 2 only, as

// published by the Free Software Foundation.

//

// This code 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

// version 2 for more details (a copy is included in the LICENSE file that

// accompanied this code).

//

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

// 2 along with this work; if not, write to the Free Software Foundation,

// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

//

// Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

// or visit www.oracle.com if you need additional information or have any

// questions.

//

#include "precompiled.hpp"

#include "compiler/abstractCompiler.hpp"

#include "compiler/compileBroker.hpp"

#include "runtime/mutexLocker.hpp"

bool AbstractCompiler::should_perform_init() {

  if (_compiler_state != initialized) {

    MonitorLocker only_one(CompileThread_lock);

    if (_compiler_state == uninitialized) {

      _compiler_state = initializing;

      return true;

    } else {

      while (_compiler_state == initializing) {

        only_one.wait();

      }

    }

  }

  return false;

}

bool AbstractCompiler::should_perform_shutdown() {

  // Since this method can be called by multiple threads, the lock ensures atomicity of

  // decrementing '_num_compiler_threads' and the following operations.

  MutexLocker only_one(CompileThread_lock);

  _num_compiler_threads--;

  assert (CompileBroker::is_compilation_disabled_forever(), "Must be set, otherwise thread waits forever");

  // Only the last thread will perform shutdown operations

  if (_num_compiler_threads == 0) {

    return true;

  }

  return false;

}

void AbstractCompiler::set_state(int state) {

  // Ensure that state is only set by one thread at a time

  MutexLocker only_one(CompileThread_lock);

  _compiler_state =  state;

  CompileThread_lock->notify_all();

}