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RWLock_POSIX.h
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RWLock_POSIX.h
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#ifndef _RWLock_POSIX_INCLUDED
#define _RWLock_POSIX_INCLUDED
#include <pthread.h>
#include <errno.h>
namespace Common {
class RWLockImpl
{
protected:
RWLockImpl();
~RWLockImpl();
void readLockImpl();
bool tryReadLockImpl();
void writeLockImpl();
bool tryWriteLockImpl();
void unlockImpl();
private:
pthread_rwlock_t _rwl;
};
//
// inlines
//
inline void RWLockImpl::readLockImpl()
{
if (pthread_rwlock_rdlock(&_rwl))
throw ("cannot lock reader/writer lock");
}
inline bool RWLockImpl::tryReadLockImpl()
{
int rc = pthread_rwlock_tryrdlock(&_rwl);
if (rc == 0)
return true;
else if (rc == EBUSY)
return false;
else
throw ("cannot lock reader/writer lock");
}
inline void RWLockImpl::writeLockImpl()
{
if (pthread_rwlock_wrlock(&_rwl))
throw ("cannot lock reader/writer lock");
}
inline bool RWLockImpl::tryWriteLockImpl()
{
int rc = pthread_rwlock_trywrlock(&_rwl);
if (rc == 0)
return true;
else if (rc == EBUSY)
return false;
else
throw ("cannot lock reader/writer lock");
}
inline void RWLockImpl::unlockImpl()
{
if (pthread_rwlock_unlock(&_rwl))
throw ("cannot unlock mutex");
}
} // namespace Utils
#endif // _RWLock_POSIX_INCLUDED