mirror of
https://github.com/nginx/nginx.git
synced 2024-12-15 21:39:00 +08:00
163 lines
4.5 KiB
C
163 lines
4.5 KiB
C
|
|
/*
|
|
* Copyright (C) Igor Sysoev
|
|
* Copyright (C) Nginx, Inc.
|
|
*/
|
|
|
|
|
|
#ifndef _NGX_BUF_H_INCLUDED_
|
|
#define _NGX_BUF_H_INCLUDED_
|
|
|
|
|
|
#include <ngx_config.h>
|
|
#include <ngx_core.h>
|
|
|
|
|
|
typedef void * ngx_buf_tag_t;
|
|
|
|
typedef struct ngx_buf_s ngx_buf_t;
|
|
|
|
struct ngx_buf_s {
|
|
u_char *pos;
|
|
u_char *last;
|
|
off_t file_pos;
|
|
off_t file_last;
|
|
|
|
u_char *start; /* start of buffer */
|
|
u_char *end; /* end of buffer */
|
|
ngx_buf_tag_t tag;
|
|
ngx_file_t *file;
|
|
ngx_buf_t *shadow;
|
|
|
|
|
|
/* the buf's content could be changed */
|
|
unsigned temporary:1;
|
|
|
|
/*
|
|
* the buf's content is in a memory cache or in a read only memory
|
|
* and must not be changed
|
|
*/
|
|
unsigned memory:1;
|
|
|
|
/* the buf's content is mmap()ed and must not be changed */
|
|
unsigned mmap:1;
|
|
|
|
unsigned recycled:1;
|
|
unsigned in_file:1;
|
|
unsigned flush:1;
|
|
unsigned sync:1;
|
|
unsigned last_buf:1;
|
|
unsigned last_in_chain:1;
|
|
|
|
unsigned last_shadow:1;
|
|
unsigned temp_file:1;
|
|
|
|
/* STUB */ int num;
|
|
};
|
|
|
|
|
|
struct ngx_chain_s {
|
|
ngx_buf_t *buf;
|
|
ngx_chain_t *next;
|
|
};
|
|
|
|
|
|
typedef struct {
|
|
ngx_int_t num;
|
|
size_t size;
|
|
} ngx_bufs_t;
|
|
|
|
|
|
typedef struct ngx_output_chain_ctx_s ngx_output_chain_ctx_t;
|
|
|
|
typedef ngx_int_t (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in);
|
|
|
|
#if (NGX_HAVE_FILE_AIO)
|
|
typedef void (*ngx_output_chain_aio_pt)(ngx_output_chain_ctx_t *ctx,
|
|
ngx_file_t *file);
|
|
#endif
|
|
|
|
struct ngx_output_chain_ctx_s {
|
|
ngx_buf_t *buf;
|
|
ngx_chain_t *in;
|
|
ngx_chain_t *free;
|
|
ngx_chain_t *busy;
|
|
|
|
unsigned sendfile:1;
|
|
unsigned directio:1;
|
|
#if (NGX_HAVE_ALIGNED_DIRECTIO)
|
|
unsigned unaligned:1;
|
|
#endif
|
|
unsigned need_in_memory:1;
|
|
unsigned need_in_temp:1;
|
|
#if (NGX_HAVE_FILE_AIO)
|
|
unsigned aio:1;
|
|
|
|
ngx_output_chain_aio_pt aio_handler;
|
|
#endif
|
|
|
|
off_t alignment;
|
|
|
|
ngx_pool_t *pool;
|
|
ngx_int_t allocated;
|
|
ngx_bufs_t bufs;
|
|
ngx_buf_tag_t tag;
|
|
|
|
ngx_output_chain_filter_pt output_filter;
|
|
void *filter_ctx;
|
|
};
|
|
|
|
|
|
typedef struct {
|
|
ngx_chain_t *out;
|
|
ngx_chain_t **last;
|
|
ngx_connection_t *connection;
|
|
ngx_pool_t *pool;
|
|
off_t limit;
|
|
} ngx_chain_writer_ctx_t;
|
|
|
|
|
|
#define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
|
|
|
|
|
|
#define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap)
|
|
#define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file)
|
|
|
|
#define ngx_buf_special(b) \
|
|
((b->flush || b->last_buf || b->sync) \
|
|
&& !ngx_buf_in_memory(b) && !b->in_file)
|
|
|
|
#define ngx_buf_sync_only(b) \
|
|
(b->sync \
|
|
&& !ngx_buf_in_memory(b) && !b->in_file && !b->flush && !b->last_buf)
|
|
|
|
#define ngx_buf_size(b) \
|
|
(ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos): \
|
|
(b->file_last - b->file_pos))
|
|
|
|
ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size);
|
|
ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs);
|
|
|
|
|
|
#define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t))
|
|
#define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t))
|
|
|
|
ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool);
|
|
#define ngx_free_chain(pool, cl) \
|
|
cl->next = pool->chain; \
|
|
pool->chain = cl
|
|
|
|
|
|
|
|
ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
|
|
ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in);
|
|
|
|
ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
|
|
ngx_chain_t *in);
|
|
ngx_chain_t *ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free);
|
|
void ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free,
|
|
ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag);
|
|
|
|
|
|
#endif /* _NGX_BUF_H_INCLUDED_ */
|