Libevent is pretty cool, but it is not “fast” for all applications. For example, it retrieves the system clock frequently, which can be a performance. libtorque: Portable Multithreaded Continuations decade’s architectures and operating systems, as libevent , libev, Java NIO and others achieved ubiquity much room for improving non-blocking I/O solu- Network programming abounds with task idioms. .. this approach could be the fastest path to true zero- . I want to know how to use libevent l.4,especially the use of http. can anybody give me a Fast portable non-blocking network programming with Libevent.
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Usually an application wants to perform some amount of data buffering in addition to just responding to events.
When we want to write data, for example, the usual pattern looks like:. Decide that we want to write some data to a connection; put that data in a buffer. Remember how much we wrote, and if we still have more libeveent to write, wait for the connection to become writable again.
A “buffer event” consists of an underlying transport like a socketa read buffer, and a write buffer. Instead of regular events, which give callbacks when the underlying transport is ready portahle be read or written, a buffer event invokes its user-supplied callbacks when it has read or written enough data.
Numeric file descriptor associated with the buffer event. Normally represents a bound socket. Equals to NULLif there is no file descriptor socket associated with the buffer event.
Constructing signal events
Underlying input buffer object EventBuffer. Underlying output buffer object EventBuffer.
An event occured during a read operation on the bufferevent. See the other flags for which portabke it was. An event occured during a write operation on the bufferevent.
PHP: EventBufferEvent – Manual
An error ilbevent during a bufferevent operation. For more information on what the error was, call EventUtil:: When the buffer event is freed, close the underlying transport.
This will close an underlying socket, free an underlying buffer event, etc.
When this flag is set, the bufferevent defers all of its callbacks. Edit Report a Bug. When we want to write data, for example, the usual pattern looks like: Wait for the connection to become writable Write as much of the data as we can Remember how much we wrote, and if we still have more data to write, wait for the connection to become writable again. Properties fd Numeric file descriptor associated with the buffer event.
EOF Got an end-of-file indication on the buffer event.