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#include <ngx_config.h>
#include <ngx_core.h>
ngx_hunk_t *ngx_create_temp_hunk(ngx_pool_t *pool, size_t size)
{
ngx_hunk_t *h;
ngx_test_null(h, ngx_alloc_hunk(pool), NULL);
ngx_test_null(h->start, ngx_palloc(pool, size), NULL);
h->pos = h->start;
h->last = h->start;
h->file_pos = 0;
h->file_last = 0;
h->end = h->last + size;
h->type = NGX_HUNK_TEMP|NGX_HUNK_IN_MEMORY;
h->file = NULL;
h->shadow = NULL;
h->tag = 0;
return h;
}
ngx_chain_t *ngx_create_chain_of_hunks(ngx_pool_t *pool, ngx_bufs_t *bufs)
{
int i;
char *p;
ngx_hunk_t *h;
ngx_chain_t *chain, *cl, **ll;
ngx_test_null(p, ngx_palloc(pool, bufs->num * bufs->size), NULL);
ll = &chain;
for (i = 0; i < bufs->num; i++) {
ngx_test_null(h, ngx_alloc_hunk(pool), NULL);
h->pos = p;
h->last = p;
h->file_pos = 0;
h->file_last = 0;
h->type = NGX_HUNK_IN_MEMORY|NGX_HUNK_TEMP;
h->start = p;
p += bufs->size;
h->end = p;
h->file = NULL;
h->shadow = NULL;
h->tag = 0;
ngx_test_null(cl, ngx_alloc_chain_link(pool), NULL);
cl->hunk = h;
*ll = cl;
ll = &cl->next;
}
*ll = NULL;
return chain;
}
int ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
{
ngx_chain_t *cl, **ll;
ll = chain;
for (cl = *chain; cl; cl = cl->next) {
ll = &cl->next;
}
while (in) {
ngx_test_null(cl, ngx_alloc_chain_link(pool), NGX_ERROR);
cl->hunk = in->hunk;
*ll = cl;
ll = &cl->next;
in = in->next;
}
*ll = NULL;
return NGX_OK;
}
void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
ngx_chain_t **out, ngx_hunk_tag_t tag)
{
ngx_chain_t *te;
if (*busy == NULL) {
*busy = *out;
} else {
for (te = *busy; /* void */ ; te = te->next) {
if (te->next == NULL) {
te->next = *out;
break;
}
}
}
*out = NULL;
while (*busy) {
if (ngx_hunk_size((*busy)->hunk) != 0) {
break;
}
#if (HAVE_WRITE_ZEROCOPY)
if ((*busy)->hunk->type & NGX_HUNK_ZEROCOPY_BUSY) {
break;
}
#endif
if ((*busy)->hunk->tag != tag) {
*busy = (*busy)->next;
continue;
}
(*busy)->hunk->pos = (*busy)->hunk->last = (*busy)->hunk->start;
te = *busy;
*busy = (*busy)->next;
te->next = *free;
*free = te;
}
}
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