RWLocker.cpp

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* Copyright (C) 2006, Novell, Inc. All rights reserved.
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#include "blocxx/BLOCXX_config.h"
#include "blocxx/RWLocker.hpp"
#include "blocxx/ThreadImpl.hpp"

namespace BLOCXX_NAMESPACE
{

BLOCXX_DEFINE_EXCEPTION_WITH_ID(RWLocker);

inline bool RWLocker::ThreadComparer::operator()(Thread_t x, Thread_t y) const
{
#ifdef BLOCXX_NCR
   return !ThreadImpl::sameThreads(x, y) && (cma_thread_get_unique(&x) < cma_thread_get_unique(&y));
#else
   return !ThreadImpl::sameThreads(x, y) && x < y;
#endif
}

RWLocker::RWLocker()
{
}
RWLocker::~RWLocker()
{
}
void
RWLocker::getReadLock(UInt32 sTimeout, UInt32 usTimeout)
{
   getReadLock(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0));
}

void
RWLocker::getReadLock(const Timeout& timeout)
{
   Thread_t tid = ThreadImpl::currentThread();
   m_impl.acquireReadLock(tid, timeout);
}

void
RWLocker::releaseReadLock()
{
   Thread_t tid = ThreadImpl::currentThread();
   try
   {
      m_impl.releaseReadLock(tid);
   }
   catch (GenericRWLockImplException& e)
   {
      BLOCXX_THROW_SUBEX(RWLockerException, "Cannot release a read lock when no read lock is held", e);
   }
}

void
RWLocker::getWriteLock(UInt32 sTimeout, UInt32 usTimeout)
{
   getWriteLock(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0));
}
void
RWLocker::getWriteLock(const Timeout& timeout)
{
   Thread_t tid = ThreadImpl::currentThread();
   m_impl.acquireWriteLock(tid, timeout);
}

void
RWLocker::releaseWriteLock()
{
   Thread_t tid = ThreadImpl::currentThread();
   try
   {
      m_impl.releaseWriteLock(tid);
   }
   catch (GenericRWLockImplException& e)
   {
      BLOCXX_THROW_SUBEX(RWLockerException, "Cannot release a write lock when no write lock is held", e);
   }
}

} // end namespace BLOCXX_NAMESPACE

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