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#include <ngx_config.h>
#include <ngx_errno.h>
#include <ngx_log.h>
#include <ngx_alloc.h>
void *ngx_alloc(size_t size, ngx_log_t *log)
{
void *p;
p = malloc(size);
if (p == NULL)
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"ngx_alloc: malloc %d bytes failed", size);
return p;
}
void *ngx_calloc(size_t size, ngx_log_t *log)
{
void *p;
p = ngx_alloc(size, log);
if (p)
ngx_memzero(p, size);
return p;
}
ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log)
{
ngx_pool_t *p;
ngx_test_null(p, ngx_alloc(size, log), NULL);
p->last = (char *) p + sizeof(ngx_pool_t);
p->end = (char *) p + size;
p->next = NULL;
p->large = NULL;
p->log = log;
return p;
}
void ngx_destroy_pool(ngx_pool_t *pool)
{
ngx_pool_t *p, *n;
ngx_pool_large_t *l;
for (l = pool->large; l; l = l->next)
free(l->alloc);
for (p = pool, n = pool->next; /* void */; p = n, n = n->next) {
free(p);
if (n == NULL)
break;
}
}
void *ngx_palloc(ngx_pool_t *pool, size_t size)
{
void *m;
ngx_pool_t *p, *n;
ngx_pool_large_t *large, *last;
if (size <= NGX_MAX_ALLOC_FROM_POOL) {
for (p = pool, n = pool->next; /* void */; p = n, n = n->next) {
if ((size_t) (p->end - p->last) >= size) {
m = p->last;
p->last += size;
return m;
}
if (n == NULL)
break;
}
/* alloc new pool block */
ngx_test_null(n, ngx_create_pool(p->end - (char *) p, p->log), NULL);
p->next = n;
m = n->last;
n->last += size;
return m;
/* alloc large block */
} else {
large = NULL;
last = NULL;
if (pool->large) {
for (last = pool->large; /* void */; last = last->next) {
if (last->alloc == NULL) {
large = last;
last = NULL;
break;
}
if (last->next == NULL)
break;
}
}
if (large == NULL) {
ngx_test_null(large, ngx_palloc(pool, sizeof(ngx_pool_large_t)),
NULL);
}
ngx_test_null(p, ngx_alloc(size, pool->log), NULL);
if (pool->large == NULL) {
pool->large = large;
} else if (last) {
last->next = large;
}
large->alloc = p;
return p;
}
}
void *ngx_pcalloc(ngx_pool_t *pool, size_t size)
{
void *p;
p = ngx_palloc(pool, size);
if (p)
ngx_memzero(p, size);
return p;
}
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