void Channel::handleEvent()
{
if((pollEvent_&POLLHUP)&&!(pollEvent_&POLLIN))
{
if(closeCallback_) closeCallback_();
}
if(pollEvent_&(POLLIN|POLLPRI))
{
if(readCallback_) readCallback_();
}
if(pollEvent_&POLLOUT)
{
if(writeCallback_) writeCallback_();
}
}
void run() {
unsigned int curBufferSize = 2048;
int8_t* buf = reinterpret_cast<int8_t*>(malloc(curBufferSize));
while (running_) {
ReadInformation next;
{
boost::mutex::scoped_lock lock(mutex_);
if (!queue_.empty()) {
next = queue_.front();
queue_.pop();
} else {
signal_.wait(lock);
continue;
}
}
if (next.offset_ == 0xFFFFFFFFu) {
// skip this. could be e.g. a static block with no data
next.item_->setReadComplete();
continue;
}
// trying to read out of file bounds
if (next.offset_ > fileSize_ || (next.offset_ + next.readLen_) > fileSize_) {
LOG_WARN << "Trying to read out of file bounds in file " << path_ << ", size=" << fileSize_ << " start=" << next.offset_
<< " len=" << next.readLen_ << std::endl;
continue;
}
if (next.offset_ != stream_.tellg()) {
stream_.seekg(next.offset_, std::ios_base::beg);
}
if (next.readLen_ > curBufferSize) {
//printf("Resizing buffer to %u\n", next.readLen_ * 2);
buf = reinterpret_cast<int8_t*>(realloc(buf, next.readLen_ * 2));
curBufferSize = next.readLen_;
}
//printf("decode thread read %u bytes from %u\n", next.readLen_, next.offset_);
stream_.read(reinterpret_cast<char*>(buf), next.readLen_);
readCallback_(next.index_, buf, next.readLen_, next.item_, next.extra_, next.userData_);
next.item_->setReadComplete();
}
}
void Channel::handleEvent()
{
eventHandling_ = true;
#ifndef NDEBUG
//MDLog( "channel::handleEvent revent:%d, %s.", revents_, reventsToString().c_str() );
#endif
//套接字关闭了，并且没有可读数据
if ((revents_ & POLLHUP) && !(revents_ & POLLIN))
{
if (closeCallback_) closeCallback_();
}
if (revents_ & POLLNVAL)
{
MDWarning( "fd = %d Channel::handle_event() POLLNVAL", fd_ );
}
//套接字出错了
if (revents_ & (POLLERR | POLLNVAL))
{
if (errorCallback_) errorCallback_();
}
//数据可读 (注意windows下不支持POLLPRI和POLLRDHUP, POLLIN表示了优先级数据和普通数据的非阻塞可读)
if (revents_ & (POLLIN | POLLPRI | POLLRDHUP))
{
if (readCallback_) readCallback_();
}
if (revents_ & POLLOUT)
{
if (writeCallback_) writeCallback_();
}
eventHandling_ = false;
}
