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Message-related functionality factored out into msg_t class.

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This patch addresses serveral issues:
1. It gathers message related functionality scattered over whole
   codebase into a single class.
2. It makes zmq_msg_t an opaque datatype. Internals of the class
   don't pollute zmq.h header file.
3. zmq_msg_t size decreases from 48 to 32 bytes. That saves ~33%
   of memory in scenarios with large amount of small messages.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
This commit is contained in:
Martin Sustrik
2011-04-21 22:27:48 +02:00
parent 581697695a
commit e0246e32d7
55 changed files with 608 additions and 476 deletions
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13
src/pipe.hpp
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@@ -21,8 +21,7 @@
#ifndef __ZMQ_PIPE_HPP_INCLUDED__
#define __ZMQ_PIPE_HPP_INCLUDED__
#include "../include/zmq.h"
#include "msg.hpp"
#include "array.hpp"
#include "ypipe.hpp"
#include "config.hpp"
@@ -43,7 +42,7 @@ namespace zmq
// event. When endpoint processes the event and returns, associated
// reader/writer object is deallocated.
typedef ypipe_t <zmq_msg_t, message_pipe_granularity> pipe_t;
typedef ypipe_t <msg_t, message_pipe_granularity> pipe_t;
struct i_reader_events
{
@@ -69,7 +68,7 @@ namespace zmq
bool check_read ();
// Reads a message to the underlying pipe.
bool read (zmq_msg_t *msg_);
bool read (msg_t *msg_);
// Ask pipe to terminate.
void terminate ();
@@ -87,7 +86,7 @@ namespace zmq
void process_pipe_term_ack ();
// Returns true if the message is delimiter; false otherwise.
static bool is_delimiter (zmq_msg_t &msg_);
static bool is_delimiter (msg_t &msg_);
// True, if pipe can be read from.
bool active;
@@ -136,11 +135,11 @@ namespace zmq
// Checks whether messages can be written to the pipe.
// If writing the message would cause high watermark
// the function returns false.
bool check_write (zmq_msg_t *msg_);
bool check_write (msg_t *msg_);
// Writes a message to the underlying pipe. Returns false if the
// message cannot be written because high watermark was reached.
bool write (zmq_msg_t *msg_);
bool write (msg_t *msg_);
// Remove unfinished part of a message from the pipe.
void rollback ();