int32_t _send( struct session * self, char * buf, uint32_t nbytes )
{
int32_t rc = 0;
if ( self->status&SESSION_EXITING )
{
// 等待关闭的连接
return -1;
}
// 判断session是否繁忙
if ( !(self->status&SESSION_WRITING)
&& session_sendqueue_count(self) == 0 )
{
// 直接发送
rc = channel_send( self, buf, nbytes );
if ( rc == nbytes )
{
// 全部发送出去
return rc;
}
// 为什么发送错误没有直接终止会话呢？
// 该接口有可能在ioservice_t中调用, 直接终止会话后, 会引发后续对会话的操作崩溃
}
// 创建message, 添加到发送队列中
struct message * message = message_create();
if ( message == NULL )
{
return -2;
}
message_add_buffer( message, buf+rc, nbytes-rc );
message_add_receiver( message, self->id );
QUEUE_PUSH(sendqueue)(&self->sendqueue, &message);
session_add_event( self, EV_WRITE );
return rc;
}
int32_t iolayer_broadcast( iolayer_t self, sid_t * ids, uint32_t count, const char * buf, uint32_t nbytes )
{
uint8_t i = 0;
int32_t rc = 0;
pthread_t threadid = pthread_self();
struct iolayer * layer = (struct iolayer *)self;
for ( i = 0; i < layer->nthreads; ++i )
{
struct message * msg = message_create();
if ( unlikely(msg == NULL) )
{
continue;
}
message_add_receivers( msg, ids, count );
message_add_buffer( msg, (char *)buf, nbytes );
if ( threadid == iothreads_get_id( layer->group, i ) )
{
// 本线程内直接广播
_broadcast_direct( layer, i, _get_manager(layer, i), msg );
}
else
{
// 跨线程提交广播任务
int32_t result = iothreads_post( layer->group, i, eIOTaskType_Broadcast, msg, 0 );
if ( unlikely(result != 0) )
{
message_destroy( msg );
continue;
}
}
rc += count;
}
return rc;
}