Mercurial > hg > nginx-quic
annotate src/core/ngx_array.c @ 180:2d143372a1ee
nginx-0.0.1-2003-11-12-01:16:11 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 11 Nov 2003 22:16:11 +0000 |
parents | 7ebc8b7fb816 |
children | 87e73f067470 |
rev | line source |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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6 ngx_array_t *ngx_create_array(ngx_pool_t *p, int n, size_t size) |
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7 { |
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8 ngx_array_t *a; |
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10 ngx_test_null(a, ngx_palloc(p, sizeof(ngx_array_t)), NULL); |
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12 ngx_test_null(a->elts, ngx_palloc(p, n * size), NULL); |
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14 a->pool = p; |
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15 a->nelts = 0; |
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16 a->nalloc = n; |
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17 a->size = size; |
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19 return a; |
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20 } |
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23 void ngx_destroy_array(ngx_array_t *a) |
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24 { |
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25 ngx_pool_t *p; |
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27 p = a->pool; |
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29 if ((char *) a->elts + a->size * a->nalloc == p->last) { |
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30 p->last -= a->size * a->nalloc; |
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31 } |
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33 if ((char *) a + sizeof(ngx_array_t) == p->last) { |
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34 p->last = (char *) a; |
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35 } |
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36 } |
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39 void *ngx_push_array(ngx_array_t *a) |
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40 { |
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41 void *elt, *new; |
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42 ngx_pool_t *p; |
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43 |
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44 /* array is full */ |
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45 if (a->nelts == a->nalloc) { |
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46 p = a->pool; |
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47 |
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48 /* array allocation is the last in the pool */ |
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49 if ((char *) a->elts + a->size * a->nelts == p->last |
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50 && (unsigned) (p->end - p->last) >= a->size) |
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51 { |
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52 p->last += a->size; |
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53 a->nalloc++; |
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54 |
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55 /* allocate new array */ |
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56 } else { |
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57 ngx_test_null(new, ngx_palloc(p, 2 * a->nalloc * a->size), NULL); |
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59 ngx_memcpy(new, a->elts, a->nalloc * a->size); |
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60 a->elts = new; |
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61 a->nalloc *= 2; |
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62 } |
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63 } |
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65 elt = (char *) a->elts + a->size * a->nelts; |
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66 a->nelts++; |
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67 |
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68 return elt; |
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69 } |