982b6e37e4
A new data type has been added : pipes. Some pre-allocated empty pipes are maintained in a pool for users such as splice which use them a lot for very short times. Pipes are allocated using get_pipe() and released using put_pipe(). Pipes which are released with pending data are immediately killed. The struct pipe is small (16 to 20 bytes) and may even be further reduced by unifying ->data and ->next. It would be nice to have a dedicated cleanup task which would watch for the pipes usage and destroy a few of them from time to time.
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
|
|
include/types/pipe.h
|
|
Pipe management.
|
|
|
|
Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation, version 2.1
|
|
exclusively.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef _TYPES_PIPE_H
|
|
#define _TYPES_PIPE_H
|
|
|
|
#include <common/config.h>
|
|
|
|
/* A pipe is described by its read and write FDs, and the data remaining in it.
|
|
* The FDs are valid if there are data pending. The user is not allowed to
|
|
* change the FDs.
|
|
*/
|
|
struct pipe {
|
|
int data; /* number of bytes present in the pipe */
|
|
int prod; /* FD the producer must write to ; -1 if none */
|
|
int cons; /* FD the consumer must read from ; -1 if none */
|
|
struct pipe *next;
|
|
};
|
|
|
|
#endif /* _TYPES_PIPE_H */
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-indent-level: 8
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|