tars源码分析之12

读写锁终于来了，一起来看看实现吧，是很典型的：

#include "util/tc_thread_rwlock.h"
#include <string.h>
#include <iostream>
#include <cassert>
 
namespace tars
{
 
TC_ThreadRWLocker::TC_ThreadRWLocker()
{
    int ret = ::pthread_rwlock_init(&m_sect, NULL);
    assert(ret == 0);
 
    if(ret != 0)
    {
        throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::TC_ThreadRWLocker] pthread_rwlock_init error", ret);
    }
}
 
TC_ThreadRWLocker::~TC_ThreadRWLocker()
{
    int ret = ::pthread_rwlock_destroy(&m_sect);
    if(ret != 0)
    {
        cerr<<"[TC_ThreadRWLocker::~TC_ThreadRWLocker] pthread_rwlock_destroy error:"<<string(strerror(ret))<<endl;;
    }
 
}
 
void TC_ThreadRWLocker::ReadLock() const
{
    int ret = ::pthread_rwlock_rdlock(&m_sect);
    if(ret != 0)
    {
        if(ret == EDEADLK)
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::ReadLock] pthread_rwlock_rdlock dead lock error", ret);
        }
        else
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::ReadLock] pthread_rwlock_rdlock error", ret);
        }
    }
}
 
 
void TC_ThreadRWLocker::WriteLock() const
{
    int ret = ::pthread_rwlock_wrlock(&m_sect);
    if(ret != 0)
    {
        if(ret == EDEADLK)
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::WriteLock] pthread_rwlock_wrlock dead lock error", ret);
        }
        else
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::WriteLock] pthread_rwlock_wrlock error", ret);
        }
    }
 
}
 
void TC_ThreadRWLocker::TryReadLock() const
{
    int ret = ::pthread_rwlock_tryrdlock(&m_sect);
    if(ret != 0)
    {
        if(ret == EDEADLK)
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::TryReadLock] pthread_rwlock_tryrdlock dead lock error", ret);
        }
        else
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::TryReadLock] pthread_rwlock_tryrdlock error", ret);
        }
    }
 
}
 
void TC_ThreadRWLocker::TryWriteLock() const
{
    int ret = ::pthread_rwlock_trywrlock(&m_sect);
    if(ret != 0)
    {
        if(ret == EDEADLK)
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::TryWriteLock] pthread_rwlock_trywrlock dead lock error", ret);
        }
        else
        {
            throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::TryWriteLock] pthread_rwlock_trywrlock error", ret);
        }
    }
 
}
 
void TC_ThreadRWLocker::Unlock() const
{
    int ret = ::pthread_rwlock_unlock(&m_sect);
    if(ret != 0)
    {
        throw TC_ThreadRW_Exception("[TC_ThreadRWLocker::Unlock] pthread_rwlock_unlock error", ret);
    }
 
}
 
}