Mercurial > hg > nginx-quic
annotate src/core/ngx_array.c @ 484:60452f1c0c62
release-0.1.16 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 25 Jan 2005 12:27:35 +0000 |
parents | 42d11f017717 |
children | 4ebe09b07e30 |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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11 ngx_array_t *ngx_create_array(ngx_pool_t *p, ngx_uint_t n, size_t size) |
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12 { |
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13 ngx_array_t *a; |
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15 ngx_test_null(a, ngx_palloc(p, sizeof(ngx_array_t)), NULL); |
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17 ngx_test_null(a->elts, ngx_palloc(p, n * size), NULL); |
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19 a->pool = p; |
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20 a->nelts = 0; |
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21 a->nalloc = n; |
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22 a->size = size; |
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23 |
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24 return a; |
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25 } |
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28 void ngx_destroy_array(ngx_array_t *a) |
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29 { |
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30 ngx_pool_t *p; |
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32 p = a->pool; |
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34 if ((char *) a->elts + a->size * a->nalloc == p->last) { |
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35 p->last -= a->size * a->nalloc; |
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36 } |
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38 if ((char *) a + sizeof(ngx_array_t) == p->last) { |
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39 p->last = (char *) a; |
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40 } |
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41 } |
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44 void *ngx_push_array(ngx_array_t *a) |
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45 { |
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46 void *elt, *new; |
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47 ngx_pool_t *p; |
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48 |
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49 /* array is full */ |
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50 if (a->nelts == a->nalloc) { |
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51 p = a->pool; |
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52 |
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53 /* array allocation is the last in the pool */ |
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54 if ((char *) a->elts + a->size * a->nelts == p->last |
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55 && (unsigned) (p->end - p->last) >= a->size) |
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56 { |
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57 p->last += a->size; |
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58 a->nalloc++; |
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59 |
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60 /* allocate new array */ |
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61 } else { |
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62 ngx_test_null(new, ngx_palloc(p, 2 * a->nalloc * a->size), NULL); |
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64 ngx_memcpy(new, a->elts, a->nalloc * a->size); |
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65 a->elts = new; |
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66 a->nalloc *= 2; |
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67 } |
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68 } |
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70 elt = (char *) a->elts + a->size * a->nelts; |
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71 a->nelts++; |
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72 |
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73 return elt; |
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74 } |