int BufferedOS::writevEx(IOVec &vec, int avoidCache)
{
assert(m_pOS != NULL);
int ret;
if (!m_buf.empty())
{
int oldLen = vec.len();
m_buf.iovInsert(vec);
//TEST: DEBUG Code
//ret = 0;
ret = m_pOS->writev(vec.get(), vec.len());
vec.pop_front(vec.len() - oldLen);
if (ret > 0)
{
int pop = ret;
if (pop > m_buf.size())
pop = m_buf.size();
m_buf.pop_front(pop);
ret -= pop;
}
}
else
//TEST: DEBUG Code
//ret = 0;
ret = m_pOS->writev(vec.get(), vec.len());
if (ret >= avoidCache)
ret = m_buf.cache(vec.get(), vec.len(), ret);
//LS_DBG_H( "bufferedOS::writev() return %d, %d bytes in cache\n", ret, m_buf.size());
return ret;
}
int BufferedOS::writevEx( IOVec &vec, int avoidCache )
{
assert( m_pOS != NULL );
int ret;
if ( !m_buf.empty() )
{
int oldLen = vec.len();
m_buf.iov_insert( vec );
//FIXME: DEBUG Code
//ret = 0;
ret = m_pOS->writev( vec.get(), vec.len() );
vec.pop_front( vec.len() - oldLen );
if ( ret > 0 )
{
int pop = ret;
if ( pop > m_buf.size() )
pop = m_buf.size();
m_buf.pop_front( pop );
ret -= pop;
}
}
else
//FIXME: DEBUG Code
//ret = 0;
ret = m_pOS->writev( vec.get(), vec.len() );
if ( ret >= avoidCache )
{
ret = m_buf.cache( vec.get(), vec.len(), ret );
}
//if ( D_ENABLED( DL_MORE ) )
// LOG_D(( "bufferedOS::writev() return %d, %d bytes in cache\n", ret, m_buf.size() ));
return ret;
}
int BufferedOS::cacheWritev(IOVec &vector, int total)
{
if (m_buf.size() + total < 40960)
{
m_buf.cache(vector.get(), vector.len(), 0);
return total;
}
else
return writevEx(vector, 0);
}
int BufferedOS::flush()
{
assert(m_pOS != NULL);
int ret = 0;
if (!m_buf.empty())
{
IOVec iov;
m_buf.getIOvec(iov);
ret = m_pOS->writev(iov.get(), iov.len());
if (ret >= 0)
{
if (m_buf.size() <= ret)
m_buf.clear();
else
m_buf.pop_front(ret);
// LS_DBG_H( "bufferedOS::flush() writen %d, %d bytes in cache\n",
// ret, m_buf.size());
ret = m_buf.size();
}
}
return ret;
}
int CacheOS::cacheWritev( IOVec &vec, int total, int * pRet)
{
int ret = 0;
int bufSize;
int written = 0;
int count = vec.len();
const struct iovec * vector = vec.get();
for( ; count > 0; --count, ++vector )
{
const char * pBuf =( const char *) vector->iov_base;
bufSize = vector->iov_len;
if (( pBuf != NULL )&&( bufSize > 0 ))
written = cacheWrite( pBuf, bufSize, pRet );
if ( written > 0 )
ret += written;
if ( ret < 0 )
break;
if ( written < bufSize )
break;
}
return ret;
}
