Mercurial > hg > nginx-quic
view src/core/ngx_array.c @ 0:4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
The first code that uses "ngx_" prefix, the previous one used "gx_" prefix.
At that point the code is not yet usable. The first draft ideas are dated
back to 23.10.2001.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 06 Aug 2002 16:39:45 +0000 |
parents | |
children | 0e81ac0bb3e2 |
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#include <ngx_config.h> #include <ngx_alloc.h> #include <ngx_array.h> ngx_array_t *ngx_create_array(ngx_pool_t *p, int n, size_t size) { ngx_array_t *a; a = ngx_palloc(p, sizeof(ngx_array_t)); if (a == NULL) return NULL; a->elts = ngx_palloc(p, n * size); if (a->elts == NULL) return NULL; a->pool = p; a->nelts = 0; a->nalloc = n; a->size = size; return a; } void ngx_destroy_array(ngx_array_t *a) { ngx_pool_t *p = a->pool; if (a->elts + a->size * a->nalloc == p->last) p->last -= a->size * a->nalloc; if ((char *) a + sizeof(ngx_array_t) == p->last) p->last = (char *) a; } void *ngx_push_array(ngx_array_t *a) { void *elt; /* array is full */ if (a->nelts == a->nalloc) { ngx_pool_t *p = a->pool; /* array allocation is the last in the pool */ if (a->elts + a->size * a->nelts == p->last && (unsigned) (p->end - p->last) >= a->size) { p->last += a->size; a->nalloc++; /* allocate new array */ } else { void *new = ngx_palloc(p, 2 * a->nalloc * a->size); if (new == NULL) return NULL; memcpy(new, a->elts, a->nalloc * a->size); a->elts = new; a->nalloc *= 2; } } elt = a->elts + a->size * a->nelts; a->nelts++; return elt; }