Scale Stack 0.3 Developer Documentation

scalestack/threading/mutex.h

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/*
 * Scale Stack
 *
 * Copyright 2010 Eric Day
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef SCALESTACK_THREADING_MUTEX_H
#define SCALESTACK_THREADING_MUTEX_H

#include <memory>

#include <scalestack/kernel/core.h>
#include <scalestack/kernel/module.h>
#include <scalestack/threading/service.h>

namespace scalestack
{
namespace threading
{

class mutex_provider;

class mutex
{
public:

  mutex(kernel::module& module);

  void lock(void);

  void unlock(void);

protected:

  kernel::module& _module;

private:

  mutex(const mutex&);

  mutex& operator=(const mutex&);

  std::auto_ptr<mutex_provider> _mutex_provider;
};

class mutex_provider
{
public:

  mutex_provider(kernel::module& module, mutex& mutex);

  virtual ~mutex_provider();

  virtual void lock(void) = 0;

  virtual void unlock(void) = 0;

protected:

  kernel::module& _module;

private:

  mutex_provider(const mutex_provider&);

  mutex_provider& operator=(const mutex_provider&);

  mutex& _mutex;
};

/*
 * Public mutex methods.
 */

inline mutex::mutex(kernel::module& module):
  _module(module),
  _mutex_provider(static_cast<threading::service&>(
    module.get_core().get_service("threading"))._add_mutex(*this))
{
}

inline void mutex::lock(void)
{
  _mutex_provider->lock();
}

inline void mutex::unlock(void)
{
  _mutex_provider->unlock();
}

/*
 * Public mutex_provider methods.
 */

inline mutex_provider::mutex_provider(kernel::module& module, mutex& mutex):
  _module(module),
  _mutex(mutex)
{
}

inline mutex_provider::~mutex_provider()
{
}

} /* namespace threading */
} /* namespace scalestack */

#endif /* SCALESTACK_THREADING_MUTEX_H */

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