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162 lines
4.9 KiB
C
162 lines
4.9 KiB
C
#ifndef _NGX_HUNK_H_INCLUDED_
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#define _NGX_HUNK_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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/* hunk type */
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/* the hunk is in memory */
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#define NGX_HUNK_IN_MEMORY 0x0001
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/* the hunk's content can be changed */
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#define NGX_HUNK_TEMP 0x0002
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/* the hunk's content is in cache and can not be changed */
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#define NGX_HUNK_MEMORY 0x0004
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/* the hunk's content is mmap()ed and can not be changed */
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#define NGX_HUNK_MMAP 0x0008
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#define NGX_HUNK_RECYCLED 0x0010
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/* the hunk is in file */
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#define NGX_HUNK_FILE 0x0020
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#define NGX_HUNK_STORAGE (NGX_HUNK_IN_MEMORY \
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|NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP \
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|NGX_HUNK_RECYCLED|NGX_HUNK_FILE)
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/* hunk flags */
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/* in thread state flush means to write the hunk completely before return */
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/* in event state flush means to start to write the hunk */
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#define NGX_HUNK_FLUSH 0x0100
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/* last hunk */
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#define NGX_HUNK_LAST 0x0200
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#define NGX_HUNK_PREREAD 0x2000
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#define NGX_HUNK_LAST_SHADOW 0x4000
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#define NGX_HUNK_TEMP_FILE 0x8000
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typedef void * ngx_hunk_tag_t;
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typedef struct ngx_hunk_s ngx_hunk_t;
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struct ngx_hunk_s {
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char *pos;
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char *last;
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off_t file_pos;
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off_t file_last;
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int type;
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char *start; /* start of hunk */
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char *end; /* end of hunk */
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ngx_hunk_tag_t tag;
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ngx_file_t *file;
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ngx_hunk_t *shadow;
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/* STUB */ int num;
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};
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typedef struct ngx_chain_s ngx_chain_t;
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struct ngx_chain_s {
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ngx_hunk_t *hunk;
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ngx_chain_t *next;
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};
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typedef struct {
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int num;
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size_t size;
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} ngx_bufs_t;
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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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ngx_hunk_t *hunk;
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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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int hunks;
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ngx_bufs_t bufs;
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ngx_hunk_tag_t tag;
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ngx_output_chain_filter_pt output_filter;
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void *output_ctx;
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} ngx_output_chain_ctx_t;
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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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} ngx_chain_writer_ctx_t;
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#define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
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#define ngx_hunk_in_memory_only(h) \
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((h->type & (NGX_HUNK_IN_MEMORY|NGX_HUNK_FILE)) == NGX_HUNK_IN_MEMORY)
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/*
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((h->type & (NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP|NGX_HUNK_FILE)) \
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== (h->type & (NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP)))
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*/
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#define ngx_hunk_special(h) \
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(h->type == (h->type & (NGX_HUNK_FLUSH|NGX_HUNK_LAST)))
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#define ngx_hunk_size(h) \
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((h->type & NGX_HUNK_IN_MEMORY) ? (size_t) (h->last - h->pos): \
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(size_t) (h->file_last - h->file_pos))
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ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, size_t size);
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#define ngx_alloc_hunk(pool) ngx_palloc(pool, sizeof(ngx_hunk_t))
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#define ngx_calloc_hunk(pool) ngx_pcalloc(pool, sizeof(ngx_hunk_t))
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#define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t))
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#define ngx_alloc_link_and_set_hunk(chain, h, pool, error) \
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do { \
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ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \
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chain->hunk = h; \
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chain->next = NULL; \
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} while (0);
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#define ngx_chain_add_link(chain, last, cl) \
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if (chain) { \
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*last = cl; \
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} else { \
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chain = cl; \
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} \
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last = &cl->next
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int ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
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int ngx_chain_writer(void *data, ngx_chain_t *in);
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int ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in);
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void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
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ngx_chain_t **out, ngx_hunk_tag_t tag);
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#endif /* _NGX_HUNK_H_INCLUDED_ */
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