\todo Optimization with custom double-to-string converter.

Return last error message or NULL if no error.

Return last error message or NULL if no error.

Init the channel with specified remote address. The address should be in format of "host:port", for example "127.0.0.1:8080".

Add a timeout event. If "expiration" of the "cntl" is a special value or already timeout, return false. Else put the "cntl" into the manager, and retu

Increase the reference count of the block. Preconditions: The block pointed by "p" was allocated by this pool and is in use currently.

Async read some data from the stream.

Async send message to the remote endpoint. The message may be first put into a pending queue if the channel is busy at that time. Before starting sen

Async send message to the remote endpoint. The message may be first put into a pending queue if the channel is busy at that time. Before starting sen

Async write some data to the stream.

Return block size pointed by "p", including the hidden header. Preconditions: The block pointed by "p" was allocated by this pool and is in use curre

Given interval in milli-seconds, calculate expiration ticks.

Choose the proper request parser. @return false if no parser matched.

Clear temp variables for sending message.

Clear temp variables for sending message.