mirror of
https://github.com/haproxy/haproxy.git
synced 2026-02-03 20:39:41 -05:00
c9fa0480af
Now the buffers only contain the header and a pointer to the storage area which can be anywhere. This will significantly simplify buffer swapping and will make it possible to map chunks on buffers as well. The buf_empty variable was removed, as now it's enough to have size==0 and area==NULL to designate the empty buffer (thus a non-allocated head is the empty buffer by default). buf_wanted for now is indicated by size==0 and area==(void *)1. The channels and the checks now embed the buffer's head, and the only pointer is to the storage area. This slightly increases the unallocated buffer size (3 extra ints for the empty buffer) but considerably simplifies dynamic buffer management. It will also later permit to detach unused checks. The way the struct buffer is arranged has proven quite efficient on a number of tests, which makes sense given that size is always accessed and often first, followed by the othe ones.
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
|
|
* include/types/compression.h
|
|
* This file defines everything related to compression.
|
|
*
|
|
* Copyright 2012 Exceliance, David Du Colombier <dducolombier@exceliance.fr>
|
|
William Lallemand <wlallemand@exceliance.fr>
|
|
*
|
|
* 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_COMP_H
|
|
#define _TYPES_COMP_H
|
|
|
|
#if defined(USE_SLZ)
|
|
#ifdef USE_ZLIB
|
|
#error "Cannot build with both USE_SLZ and USE_ZLIB at the same time."
|
|
#endif
|
|
#include <slz.h>
|
|
#elif defined(USE_ZLIB)
|
|
#include <zlib.h>
|
|
#endif
|
|
|
|
#include <common/buffer.h>
|
|
|
|
struct comp {
|
|
struct comp_algo *algos;
|
|
struct comp_type *types;
|
|
unsigned int offload;
|
|
};
|
|
|
|
struct comp_ctx {
|
|
#if defined(USE_SLZ)
|
|
struct slz_stream strm;
|
|
const void *direct_ptr; /* NULL or pointer to beginning of data */
|
|
int direct_len; /* length of direct_ptr if not NULL */
|
|
struct buffer queued; /* if not NULL, data already queued */
|
|
#elif defined(USE_ZLIB)
|
|
z_stream strm; /* zlib stream */
|
|
void *zlib_deflate_state;
|
|
void *zlib_window;
|
|
void *zlib_prev;
|
|
void *zlib_pending_buf;
|
|
void *zlib_head;
|
|
#endif
|
|
int cur_lvl;
|
|
};
|
|
|
|
/* Thanks to MSIE/IIS, the "deflate" name is ambigous, as according to the RFC
|
|
* it's a zlib-wrapped deflate stream, but MSIE only understands a raw deflate
|
|
* stream. For this reason some people prefer to emit a raw deflate stream on
|
|
* "deflate" and we'll need two algos for the same name, they are distinguished
|
|
* with the config name.
|
|
*/
|
|
struct comp_algo {
|
|
char *cfg_name; /* config name */
|
|
int cfg_name_len;
|
|
|
|
char *ua_name; /* name for the user-agent */
|
|
int ua_name_len;
|
|
|
|
int (*init)(struct comp_ctx **comp_ctx, int level);
|
|
int (*add_data)(struct comp_ctx *comp_ctx, const char *in_data, int in_len, struct buffer *out);
|
|
int (*flush)(struct comp_ctx *comp_ctx, struct buffer *out);
|
|
int (*finish)(struct comp_ctx *comp_ctx, struct buffer *out);
|
|
int (*end)(struct comp_ctx **comp_ctx);
|
|
struct comp_algo *next;
|
|
};
|
|
|
|
struct comp_type {
|
|
char *name;
|
|
int name_len;
|
|
struct comp_type *next;
|
|
};
|
|
|
|
|
|
#endif /* _TYPES_COMP_H */
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-indent-level: 8
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|
|
|