2004-09-28 16:34:51 +08:00
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/*
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2004-09-30 00:00:49 +08:00
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* Copyright (C) Igor Sysoev
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2004-09-28 16:34:51 +08:00
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*/
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2004-05-28 23:49:23 +08:00
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#ifndef _NGX_BUF_H_INCLUDED_
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#define _NGX_BUF_H_INCLUDED_
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2002-08-07 00:39:45 +08:00
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#include <ngx_config.h>
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2003-06-03 23:42:58 +08:00
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#include <ngx_core.h>
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2002-08-07 00:39:45 +08:00
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2004-09-28 16:34:51 +08:00
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typedef void * ngx_buf_tag_t;
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2002-08-07 00:39:45 +08:00
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2004-09-28 16:34:51 +08:00
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typedef struct ngx_buf_s ngx_buf_t;
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2003-06-03 23:42:58 +08:00
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2004-05-28 23:49:23 +08:00
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struct ngx_buf_s {
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2004-03-16 15:10:12 +08:00
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u_char *pos;
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u_char *last;
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2003-10-22 15:05:29 +08:00
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off_t file_pos;
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off_t file_last;
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2004-05-28 23:49:23 +08:00
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u_char *start; /* start of buffer */
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u_char *end; /* end of buffer */
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ngx_buf_tag_t tag;
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2003-10-22 15:05:29 +08:00
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ngx_file_t *file;
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2004-05-28 23:49:23 +08:00
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ngx_buf_t *shadow;
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2004-09-28 16:34:51 +08:00
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/* the buf's content could be changed */
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2004-05-28 23:49:23 +08:00
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unsigned temporary:1;
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/*
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* the buf's content is in a memory cache or in a read only memory
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2004-09-28 16:34:51 +08:00
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* and must not be changed
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2004-05-28 23:49:23 +08:00
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*/
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unsigned memory:1;
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2004-09-28 16:34:51 +08:00
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/* the buf's content is mmap()ed and must not be changed */
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2004-05-28 23:49:23 +08:00
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unsigned mmap:1;
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2004-09-28 16:34:51 +08:00
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2004-05-28 23:49:23 +08:00
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unsigned recycled:1;
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unsigned in_file:1;
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unsigned flush:1;
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unsigned last_buf:1;
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unsigned last_shadow:1;
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unsigned temp_file:1;
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unsigned zerocopy_busy:1;
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2003-10-22 15:05:29 +08:00
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/* STUB */ int num;
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2002-08-07 00:39:45 +08:00
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};
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2003-02-12 00:42:23 +08:00
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2003-06-03 23:42:58 +08:00
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typedef struct ngx_chain_s ngx_chain_t;
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2002-08-07 00:39:45 +08:00
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struct ngx_chain_s {
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2004-05-28 23:49:23 +08:00
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ngx_buf_t *buf;
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ngx_chain_t *next;
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2002-08-07 00:39:45 +08:00
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};
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2002-09-02 22:48:24 +08:00
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2003-10-08 23:32:54 +08:00
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typedef struct {
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2004-03-16 15:10:12 +08:00
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ngx_int_t num;
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2003-10-31 00:51:33 +08:00
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size_t size;
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2003-10-08 23:32:54 +08:00
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} ngx_bufs_t;
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2003-10-27 16:53:49 +08:00
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typedef int (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *out);
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typedef struct {
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2004-05-28 23:49:23 +08:00
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ngx_buf_t *buf;
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2003-10-27 16:53:49 +08:00
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ngx_chain_t *in;
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ngx_chain_t *free;
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ngx_chain_t *busy;
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unsigned sendfile;
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unsigned need_in_memory;
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unsigned need_in_temp;
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ngx_pool_t *pool;
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2004-05-28 23:49:23 +08:00
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ngx_int_t allocated;
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2003-10-27 16:53:49 +08:00
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ngx_bufs_t bufs;
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2004-05-28 23:49:23 +08:00
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ngx_buf_tag_t tag;
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2003-10-27 16:53:49 +08:00
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ngx_output_chain_filter_pt output_filter;
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2004-03-23 14:01:52 +08:00
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void *filter_ctx;
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2003-10-27 16:53:49 +08:00
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} ngx_output_chain_ctx_t;
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2003-10-28 05:01:00 +08:00
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typedef struct {
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ngx_chain_t *out;
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ngx_chain_t **last;
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ngx_connection_t *connection;
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ngx_pool_t *pool;
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2004-06-21 23:59:32 +08:00
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off_t limit;
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2003-10-30 16:51:06 +08:00
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} ngx_chain_writer_ctx_t;
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2003-10-28 05:01:00 +08:00
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2003-02-12 00:42:23 +08:00
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#define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
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2004-05-28 23:49:23 +08:00
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#define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap)
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#define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file)
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#define ngx_buf_special(b) \
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2004-06-09 15:45:27 +08:00
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((b->flush || b->last_buf) && !ngx_buf_in_memory(b) && !b->in_file)
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2004-05-28 23:49:23 +08:00
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#define ngx_buf_size(b) \
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(ngx_buf_in_memory(b) ? (size_t) (b->last - b->pos): \
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(size_t) (b->file_last - b->file_pos))
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ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size);
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ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs);
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2003-10-14 23:06:38 +08:00
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2002-09-02 22:48:24 +08:00
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2004-05-28 23:49:23 +08:00
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#define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t))
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#define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t))
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2003-04-15 01:04:58 +08:00
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2002-08-30 00:59:54 +08:00
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2003-10-23 00:38:26 +08:00
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#define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t))
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2004-05-28 23:49:23 +08:00
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#define ngx_alloc_link_and_set_buf(chain, b, pool, error) \
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2002-08-22 23:24:03 +08:00
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do { \
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2003-10-23 00:38:26 +08:00
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ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \
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2004-05-28 23:49:23 +08:00
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chain->buf = b; \
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2002-08-22 23:24:03 +08:00
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chain->next = NULL; \
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} while (0);
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2003-10-14 00:32:29 +08:00
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2003-10-23 00:38:26 +08:00
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#define ngx_chain_add_link(chain, last, cl) \
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2003-10-14 00:32:29 +08:00
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if (chain) { \
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2003-10-23 00:38:26 +08:00
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*last = cl; \
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2003-10-14 00:32:29 +08:00
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} else { \
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2003-10-23 00:38:26 +08:00
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chain = cl; \
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2003-10-14 00:32:29 +08:00
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} \
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2003-10-23 00:38:26 +08:00
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last = &cl->next
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2003-10-14 00:32:29 +08:00
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2004-06-16 23:32:11 +08:00
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ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
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ngx_int_t ngx_chain_writer(void *data, ngx_chain_t *in);
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2003-10-28 05:01:00 +08:00
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2004-06-16 23:32:11 +08:00
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ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
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ngx_chain_t *in);
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2003-09-26 13:45:21 +08:00
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void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
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2004-05-28 23:49:23 +08:00
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ngx_chain_t **out, ngx_buf_tag_t tag);
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2003-09-26 13:45:21 +08:00
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2004-05-28 23:49:23 +08:00
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#endif /* _NGX_BUF_H_INCLUDED_ */
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