#ifndef _NGX_CHUNK_H_INCLUDED_ #define _NGX_CHUNK_H_INCLUDED_ #include #include #include #include /* hunk type */ /* the hunk is in memory */ #define NGX_HUNK_IN_MEMORY 0x0001 /* the hunk's content can be changed */ #define NGX_HUNK_TEMP 0x0002 /* the hunk's content is in cache and can not be changed */ #define NGX_HUNK_MEMORY 0x0004 /* the hunk's content is mmap()ed and can not be changed */ #define NGX_HUNK_MMAP 0x0008 #define NGX_HUNK_RECYCLED 0x0010 /* the hunk is in file */ #define NGX_HUNK_FILE 0x0100 /* hunk flags */ /* in thread state flush means to write the hunk completely before return */ /* in event state flush means to start to write the hunk */ #define NGX_HUNK_FLUSH 0x1000 /* last hunk */ #define NGX_HUNK_LAST 0x2000 #define NGX_HUNK_LAST_SHADOW 0x4000 typedef struct ngx_hunk_s ngx_hunk_t; struct ngx_hunk_s { char *pos; char *last; off_t file_pos; off_t file_last; int type; char *start; /* start of hunk */ char *end; /* end of hunk */ char *pre_start; /* start of pre-allocated hunk */ char *post_end; /* end of post-allocated hunk */ int tag; ngx_file_t *file; ngx_hunk_t *shadow; }; typedef struct ngx_chain_s ngx_chain_t; struct ngx_chain_s { ngx_hunk_t *hunk; ngx_chain_t *next; }; #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR #define ngx_hunk_in_memory_only(h) \ ((h->type & (NGX_HUNK_IN_MEMORY|NGX_HUNK_FILE)) == NGX_HUNK_IN_MEMORY) ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, int size, int before, int after); #define ngx_alloc_hunk(pool) ngx_palloc(pool, sizeof(ngx_hunk_t)) #define ngx_calloc_hunk(pool) ngx_pcalloc(pool, sizeof(ngx_hunk_t)) #define ngx_alloc_chain_entry(pool) ngx_palloc(pool, sizeof(ngx_chain_t)) #define ngx_add_hunk_to_chain(chain, h, pool, error) \ do { \ ngx_test_null(chain, ngx_alloc_chain_entry(pool), error); \ chain->hunk = h; \ chain->next = NULL; \ } while (0); #endif /* _NGX_CHUNK_H_INCLUDED_ */