mirror of
https://github.com/nginx/nginx.git
synced 2025-01-19 01:42:58 +08:00
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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#include <ngx_types.h>
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#include <ngx_hunk.h>
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ngx_hunk_t *ngx_get_hunk(ngx_pool_t *pool, int size, int before, int after)
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{
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ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
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#ifndef OFF_EQUAL_PTR
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h->pos.f = h->last.f = 0;
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#endif
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h->pre_start = ngx_palloc(pool, size + before + after);
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h->start = h->pos.p = h->last.p = h->pre_start + before;
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h->end = h->last.p + size;
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h->post_end = h->end + after;
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h->type = NGX_HUNK_TEMP;
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h->tag = 0;
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h->fd = (ngx_file_t) -1;
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return h;
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}
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ngx_hunk_t *ngx_get_hunk_before(ngx_pool_t *pool, ngx_hunk_t *hunk, int size)
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{
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ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
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#ifndef OFF_EQUAL_PTR
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h->pos.f = h->last.f = 0;
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#endif
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if (hunk->type & NGX_HUNK_TEMP && hunk->pos.p - hunk->pre_start >= size) {
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/* keep hunk->start unchanged - used in restore */
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h->pre_start = hunk->pre_start;
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h->end = h->post_end = hunk->pre_start = hunk->pos.p;
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h->start = h->pos.p = h->last.p = h->end - size;
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h->type = NGX_HUNK_TEMP;
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h->tag = 0;
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h->fd = (ngx_file_t) -1;
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} else {
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h->pre_start = h->start = h->pos.p = h->last.p = ngx_palloc(pool, size);
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h->end = h->post_end = h->start + size;
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h->type = NGX_HUNK_TEMP;
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h->tag = 0;
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h->fd = (ngx_file_t) -1;
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}
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return h;
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}
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ngx_hunk_t *ngx_get_hunk_after(ngx_pool_t *pool, ngx_hunk_t *hunk, int size)
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{
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ngx_hunk_t *h = ngx_palloc(pool, sizeof(ngx_hunk_t));
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#ifndef OFF_EQUAL_PTR
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h->pos.f = h->last.f = 0;
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#endif
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if (hunk->type & NGX_HUNK_TEMP
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&& hunk->last.p == hunk->end
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&& hunk->post_end - hunk->end >= size)
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{
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h->post_end = hunk->post_end;
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h->pre_start = h->start = h->pos.p = h->last.p = hunk->post_end =
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hunk->last.p;
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h->type = NGX_HUNK_TEMP;
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h->tag = 0;
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h->fd = (ngx_file_t) -1;
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} else {
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h->pre_start = h->start = h->pos.p = h->last.p = ngx_palloc(pool, size);
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h->end = h->post_end = h->start + size;
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h->type = NGX_HUNK_TEMP;
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h->tag = 0;
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h->fd = (ngx_file_t) -1;
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}
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return h;
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}
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