Mercurial > hg > nginx
annotate src/core/ngx_array.c @ 86:3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 12 May 2003 15:52:24 +0000 |
parents | 0e81ac0bb3e2 |
children | 19cc647ecd91 |
rev | line source |
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2 #include <ngx_config.h> |
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4 #include <ngx_alloc.h> |
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5 #include <ngx_string.h> |
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6 #include <ngx_array.h> |
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9 ngx_array_t *ngx_create_array(ngx_pool_t *p, int n, size_t size) |
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10 { |
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11 ngx_array_t *a; |
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13 ngx_test_null(a, ngx_palloc(p, sizeof(ngx_array_t)), NULL); |
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15 ngx_test_null(a->elts, ngx_palloc(p, n * size), NULL); |
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17 a->pool = p; |
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18 a->nelts = 0; |
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19 a->nalloc = n; |
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20 a->size = size; |
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21 |
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22 return a; |
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23 } |
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26 void ngx_destroy_array(ngx_array_t *a) |
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27 { |
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28 ngx_pool_t *p; |
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30 p = a->pool; |
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31 |
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32 if (a->elts + a->size * a->nalloc == p->last) { |
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33 p->last -= a->size * a->nalloc; |
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34 } |
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36 if ((char *) a + sizeof(ngx_array_t) == p->last) { |
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37 p->last = (char *) a; |
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38 } |
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39 } |
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42 void *ngx_push_array(ngx_array_t *a) |
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43 { |
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44 void *elt, *new; |
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45 ngx_pool_t *p; |
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46 |
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47 /* array is full */ |
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48 if (a->nelts == a->nalloc) { |
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49 p = a->pool; |
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50 |
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51 /* array allocation is the last in the pool */ |
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52 if (a->elts + a->size * a->nelts == p->last |
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53 && (unsigned) (p->end - p->last) >= a->size) |
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54 { |
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55 p->last += a->size; |
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56 a->nalloc++; |
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57 |
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58 /* allocate new array */ |
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59 } else { |
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60 ngx_test_null(new, ngx_palloc(p, 2 * a->nalloc * a->size), NULL); |
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62 ngx_memcpy(new, a->elts, a->nalloc * a->size); |
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63 a->elts = new; |
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64 a->nalloc *= 2; |
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65 } |
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66 } |
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67 |
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68 elt = a->elts + a->size * a->nelts; |
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69 a->nelts++; |
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70 |
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71 return elt; |
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72 } |