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// **********************************************************************
//
// Copyright (c) 2003
// ZeroC, Inc.
// Billerica, MA, USA
//
// All Rights Reserved.
//
// Ice is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation.
//
// **********************************************************************
#include <IceUtil/StaticMutex.h>
#include <IceUtil/ThreadException.h>
#ifdef _WIN32
# include <list>
# include <algorithm>
using namespace std;
static CRITICAL_SECTION _criticalSection;
static list<CRITICAL_SECTION*>* _criticalSectionList;
// Although apparently not documented by Microsoft, static objects are
// initialized before DllMain/DLL_PROCESS_ATTACH and finalized after
// DllMain/DLL_PROCESS_DETACH ... that's why we use a static object.
namespace IceUtil
{
class Init
{
public:
Init();
~Init();
};
static Init _init;
Init::Init()
{
InitializeCriticalSection(&_criticalSection);
_criticalSectionList = new list<CRITICAL_SECTION*>;
}
Init::~Init()
{
for_each(_criticalSectionList->begin(), _criticalSectionList->end(),
DeleteCriticalSection);
delete _criticalSectionList;
DeleteCriticalSection(&_criticalSection);
}
}
// For full thread-safety, we assume that _mutexInitialized cannot be seen as true
// before CRITICAL_SECTION has been updated. This is true on x86. Does IA64
// provide the same memory ordering guarantees?
//
void IceUtil::StaticMutex::initialize() const
{
EnterCriticalSection(&_criticalSection);
if(!_mutexInitialized)
{
InitializeCriticalSection(&_mutex);
_mutexInitialized = true;
_criticalSectionList->push_back(&_mutex);
}
LeaveCriticalSection(&_criticalSection);
}
#endif
IceUtil::StaticMutex IceUtil::globalMutex = ICE_STATIC_MUTEX_INITIALIZER;
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