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annotate src/core/ngx_hunk.h @ 8:708f8bb772ec

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nginx-0.0.1-2002-09-02-18:48:24 import
author Igor Sysoev <igor@sysoev.ru>
date Mon, 02 Sep 2002 14:48:24 +0000
parents b5481d6fbbd4
children d81326c3b21b
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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1 #ifndef _NGX_CHUNK_H_INCLUDED_
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2 #define _NGX_CHUNK_H_INCLUDED_
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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5 #include <ngx_config.h>
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6 #include <ngx_types.h>
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7 #include <ngx_file.h>
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8 #include <ngx_alloc.h>
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11 /* hunk type */
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13 /* temp means that hunk's content can be changed */
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14 /* other type means that hunk's content can not be changed */
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15 #define NGX_HUNK_TEMP 0x0001
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16 #define NGX_HUNK_MEMORY 0x0002
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17 #define NGX_HUNK_MMAP 0x0004
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18 #define NGX_HUNK_FILE 0x0008
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20 /* hunk flags */
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22 /* in thread state flush means to write the hunk completely before return */
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23 /* in event state flush means to start to write the hunk */
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24 #define NGX_HUNK_FLUSH 0x0100
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25 /* last hunk */
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26 #define NGX_HUNK_LAST 0x0200
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27 /* can be used with NGX_HUNK_LAST only */
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28 #define NGX_HUNK_SHUTDOWN 0x0400
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30 #define NGX_HUNK_RECYCLED 0x0800
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33 #define NGX_HUNK_IN_MEMORY (NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP)
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37 typedef struct ngx_hunk_s ngx_hunk_t;
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38 struct ngx_hunk_s {
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39 union {
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40 char *mem; /* start of current data */
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41 off_t file;
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42 } pos;
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43 union {
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44 char *mem; /* end of current data */
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45 off_t file;
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46 } last;
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47 int type;
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48 char *start; /* start of hunk */
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49 char *end; /* end of hunk */
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50 char *pre_start; /* start of pre-allocated hunk */
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51 char *post_end; /* end of post-allocated hunk */
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52 int tag;
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53 ngx_file_t *file;
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54 };
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56 typedef struct ngx_chain_s ngx_chain_t;
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57 struct ngx_chain_s {
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58 ngx_hunk_t *hunk;
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59 ngx_chain_t *next;
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60 };
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63 ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, int size,
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64 int before, int after);
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66 #define ngx_create_chain_entry(pool) ngx_palloc(pool, sizeof(ngx_chain_t))
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68 #define ngx_add_hunk_to_chain(chain, h, pool, error) \
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69 do { \
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70 ngx_test_null(chain, ngx_create_chain_entry(pool), error); \
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71 chain->hunk = h; \
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72 chain->next = NULL; \
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73 } while (0);
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80 #endif /* _NGX_CHUNK_H_INCLUDED_ */