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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef __WINH_OBJ_H__
#define __WINH_OBJ_H__
#include <boost/thread/locks.hpp>
namespace epee
{
class critical_region;
class critical_section {
boost::mutex m_section;
public:
critical_section( const critical_section& section ) {
InitializeCriticalSection( &m_section );
}
critical_section() {
InitializeCriticalSection( &m_section );
}
~critical_section() {
DeleteCriticalSection( &m_section );
}
void lock() {
EnterCriticalSection( &m_section );
}
void unlock() {
LeaveCriticalSection( &m_section );
}
bool tryLock() {
return TryEnterCriticalSection( &m_section )? true:false;
}
critical_section& operator=( const critical_section& section )
{
return *this;
}
};
class critical_region {
::critical_section *m_locker;
critical_region( const critical_region& ){}
public:
critical_region(critical_section &cs ) {
m_locker = &cs;
cs.lock();
}
~critical_region()
{
m_locker->unlock();
}
};
class shared_critical_section
{
public:
shared_critical_section()
{
::InitializeSRWLock(&m_srw_lock);
}
~shared_critical_section()
{}
bool lock_shared()
{
AcquireSRWLockShared(&m_srw_lock);
return true;
}
bool unlock_shared()
{
ReleaseSRWLockShared(&m_srw_lock);
return true;
}
bool lock_exclusive()
{
::AcquireSRWLockExclusive(&m_srw_lock);
return true;
}
bool unlock_exclusive()
{
::ReleaseSRWLockExclusive(&m_srw_lock);
return true;
}
private:
SRWLOCK m_srw_lock;
};
class shared_guard
{
public:
shared_guard(shared_critical_section& ref_sec):m_ref_sec(ref_sec)
{
m_ref_sec.lock_shared();
}
~shared_guard()
{
m_ref_sec.unlock_shared();
}
private:
shared_critical_section& m_ref_sec;
};
class exclusive_guard
{
public:
exclusive_guard(shared_critical_section& ref_sec):m_ref_sec(ref_sec)
{
m_ref_sec.lock_exclusive();
}
~exclusive_guard()
{
m_ref_sec.unlock_exclusive();
}
private:
shared_critical_section& m_ref_sec;
};
class event
{
public:
event()
{
m_hevent = ::CreateEvent(NULL, FALSE, FALSE, NULL);
}
~event()
{
::CloseHandle(m_hevent);
}
bool set()
{
return ::SetEvent(m_hevent) ? true:false;
}
bool reset()
{
return ::ResetEvent(m_hevent) ? true:false;
}
HANDLE get_handle()
{
return m_hevent;
}
private:
HANDLE m_hevent;
};
#define SHARED_CRITICAL_REGION_BEGIN(x) { shared_guard critical_region_var(x)
#define EXCLUSIVE_CRITICAL_REGION_BEGIN(x) { exclusive_guard critical_region_var(x)
#define CRITICAL_REGION_LOCAL(x) critical_region critical_region_var(x)
#define CRITICAL_REGION_BEGIN(x) { critical_region critical_region_var(x)
#define CRITICAL_REGION_END() }
inline const char* get_wait_for_result_as_text(DWORD res)
{
switch(res)
{
case WAIT_ABANDONED: return "WAIT_ABANDONED";
case WAIT_TIMEOUT: return "WAIT_TIMEOUT";
case WAIT_OBJECT_0: return "WAIT_OBJECT_0";
case WAIT_OBJECT_0+1: return "WAIT_OBJECT_1";
case WAIT_OBJECT_0+2: return "WAIT_OBJECT_2";
default:
return "UNKNOWN CODE";
}
}
}// namespace epee
#endif
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