78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
|
//
|
||
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
// Copyright (c) Contributors to the OpenEXR Project.
|
||
|
|
//
|
||
|
|
|
||
|
|
#ifndef INCLUDED_ILM_THREAD_MUTEX_H
|
||
|
|
#define INCLUDED_ILM_THREAD_MUTEX_H
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// NB: Maintained for backward compatibility with header files only. This
|
||
|
|
// has been entirely replaced by c++11 and the std::mutex layer
|
||
|
|
//
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include "IlmThreadConfig.h"
|
||
|
|
#include "IlmThreadExport.h"
|
||
|
|
#include "IlmThreadNamespace.h"
|
||
|
|
|
||
|
|
#if ILMTHREAD_THREADING_ENABLED
|
||
|
|
# include <mutex>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ILMTHREAD_INTERNAL_NAMESPACE_HEADER_ENTER
|
||
|
|
|
||
|
|
#if ILMTHREAD_THREADING_ENABLED
|
||
|
|
using Mutex ILMTHREAD_DEPRECATED ("replace with std::mutex") = std::mutex;
|
||
|
|
|
||
|
|
// unfortunately we can't use std::unique_lock as a replacement for Lock since
|
||
|
|
// they have different API. Let us deprecate for now and give people a chance
|
||
|
|
// to clean up their code.
|
||
|
|
class Lock
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
ILMTHREAD_DEPRECATED ("replace with std::lock_guard or std::unique_lock")
|
||
|
|
Lock (const Mutex& m, bool autoLock = true)
|
||
|
|
: _mutex (const_cast<Mutex&> (m)), _locked (false)
|
||
|
|
{
|
||
|
|
if (autoLock)
|
||
|
|
{
|
||
|
|
_mutex.lock ();
|
||
|
|
_locked = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
~Lock ()
|
||
|
|
{
|
||
|
|
if (_locked) _mutex.unlock ();
|
||
|
|
}
|
||
|
|
Lock (const Lock&) = delete;
|
||
|
|
Lock& operator= (const Lock&) = delete;
|
||
|
|
Lock (Lock&&) = delete;
|
||
|
|
Lock& operator= (Lock&&) = delete;
|
||
|
|
|
||
|
|
void acquire ()
|
||
|
|
{
|
||
|
|
_mutex.lock ();
|
||
|
|
_locked = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void release ()
|
||
|
|
{
|
||
|
|
_locked = false;
|
||
|
|
_mutex.unlock ();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool locked () { return _locked; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
Mutex& _mutex;
|
||
|
|
bool _locked;
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ILMTHREAD_INTERNAL_NAMESPACE_HEADER_EXIT
|
||
|
|
|
||
|
|
#endif // INCLUDED_ILM_THREAD_MUTEX_H
|