Mercurial > hg > nginx-ranges
diff src/core/ngx_buf.h @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | 4b2dafa26fe2 |
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new file mode 100644 --- /dev/null +++ b/src/core/ngx_buf.h @@ -0,0 +1,153 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#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; + + int type; + 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 last_buf:1; + + unsigned last_shadow:1; + unsigned temp_file:1; + + unsigned zerocopy_busy:1; + + /* STUB */ int num; +}; + + +typedef struct ngx_chain_s ngx_chain_t; + +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 int (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *out); + +typedef struct { + ngx_buf_t *buf; + ngx_chain_t *in; + ngx_chain_t *free; + ngx_chain_t *busy; + + unsigned sendfile; + unsigned need_in_memory; + unsigned need_in_temp; + + 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; +} ngx_output_chain_ctx_t; + + +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) && !ngx_buf_in_memory(b) && !b->in_file) + +#define ngx_buf_size(b) \ + (ngx_buf_in_memory(b) ? (size_t) (b->last - b->pos): \ + (size_t) (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)) + + +#define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t)) + + +#define ngx_alloc_link_and_set_buf(chain, b, pool, error) \ + do { \ + ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \ + chain->buf = b; \ + chain->next = NULL; \ + } while (0); + + +#define ngx_chain_add_link(chain, last, cl) \ + if (chain) { \ + *last = cl; \ + } else { \ + chain = cl; \ + } \ + last = &cl->next + + +ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); +ngx_int_t ngx_chain_writer(void *data, ngx_chain_t *in); + +ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, + ngx_chain_t *in); +void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, + ngx_chain_t **out, ngx_buf_tag_t tag); + + +#endif /* _NGX_BUF_H_INCLUDED_ */