mirror of
https://github.com/nginx/nginx.git
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396 lines
7.2 KiB
C
396 lines
7.2 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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static void *ngx_palloc_block(ngx_pool_t *pool, size_t size);
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static void *ngx_palloc_large(ngx_pool_t *pool, size_t size);
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ngx_pool_t *
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ngx_create_pool(size_t size, ngx_log_t *log)
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{
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ngx_pool_t *p;
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p = ngx_alloc(size, log);
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if (p == NULL) {
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return NULL;
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}
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p->d.last = (u_char *) p + sizeof(ngx_pool_t);
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p->d.end = (u_char *) p + size;
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p->d.next = NULL;
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size = size - sizeof(ngx_pool_t);
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p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL;
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p->current = p;
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p->chain = NULL;
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p->large = NULL;
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p->cleanup = NULL;
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p->log = log;
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return p;
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}
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void
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ngx_destroy_pool(ngx_pool_t *pool)
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{
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ngx_pool_t *p, *n;
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ngx_pool_large_t *l;
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ngx_pool_cleanup_t *c;
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for (c = pool->cleanup; c; c = c->next) {
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if (c->handler) {
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ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0,
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"run cleanup: %p", c);
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c->handler(c->data);
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}
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}
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for (l = pool->large; l; l = l->next) {
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ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc);
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if (l->alloc) {
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ngx_free(l->alloc);
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}
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}
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#if (NGX_DEBUG)
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/*
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* we could allocate the pool->log from this pool
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* so we can not use this log while the free()ing the pool
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*/
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for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) {
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ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0,
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"free: %p, unused: %uz", p, p->d.end - p->d.last);
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if (n == NULL) {
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break;
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}
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}
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#endif
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for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) {
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ngx_free(p);
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if (n == NULL) {
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break;
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}
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}
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}
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void
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ngx_reset_pool(ngx_pool_t *pool)
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{
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ngx_pool_t *p;
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ngx_pool_large_t *l;
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for (l = pool->large; l; l = l->next) {
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if (l->alloc) {
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ngx_free(l->alloc);
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}
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}
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pool->large = NULL;
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for (p = pool; p; p = p->d.next) {
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p->d.last = (u_char *) p + sizeof(ngx_pool_t);
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}
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}
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void *
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ngx_palloc(ngx_pool_t *pool, size_t size)
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{
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u_char *m;
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ngx_pool_t *p;
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if (size <= pool->max) {
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p = pool->current;
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do {
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m = ngx_align_ptr(p->d.last, NGX_ALIGNMENT);
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if ((size_t) (p->d.end - m) >= size) {
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p->d.last = m + size;
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return m;
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}
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p = p->d.next;
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} while (p);
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return ngx_palloc_block(pool, size);
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}
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return ngx_palloc_large(pool, size);
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}
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void *
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ngx_pnalloc(ngx_pool_t *pool, size_t size)
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{
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u_char *m;
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ngx_pool_t *p;
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if (size <= pool->max) {
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p = pool->current;
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do {
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m = p->d.last;
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if ((size_t) (p->d.end - m) >= size) {
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p->d.last = m + size;
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return m;
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}
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p = p->d.next;
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} while (p);
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return ngx_palloc_block(pool, size);
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}
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return ngx_palloc_large(pool, size);
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}
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static void *
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ngx_palloc_block(ngx_pool_t *pool, size_t size)
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{
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u_char *m;
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size_t psize;
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ngx_pool_t *p, *new, *current;
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psize = (size_t) (pool->d.end - (u_char *) pool);
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m = ngx_alloc(psize, pool->log);
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if (m == NULL) {
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return NULL;
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}
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new = (ngx_pool_t *) m;
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new->d.end = m + psize;
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new->d.next = NULL;
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m += sizeof(ngx_pool_data_t);
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m = ngx_align_ptr(m, NGX_ALIGNMENT);
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new->d.last = m + size;
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current = pool->current;
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for (p = current; p->d.next; p = p->d.next) {
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if ((size_t) (p->d.end - p->d.last) < NGX_ALIGNMENT) {
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current = p->d.next;
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}
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}
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p->d.next = new;
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pool->current = current ? current : new;
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return m;
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}
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static void *
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ngx_palloc_large(ngx_pool_t *pool, size_t size)
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{
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void *p;
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ngx_pool_large_t *large;
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p = ngx_alloc(size, pool->log);
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if (p == NULL) {
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return NULL;
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}
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large = ngx_palloc(pool, sizeof(ngx_pool_large_t));
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if (large == NULL) {
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ngx_free(p);
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return NULL;
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}
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large->alloc = p;
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large->next = pool->large;
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pool->large = large;
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return p;
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}
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void *
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ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment)
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{
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void *p;
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ngx_pool_large_t *large;
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p = ngx_memalign(alignment, size, pool->log);
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if (p == NULL) {
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return NULL;
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}
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large = ngx_palloc(pool, sizeof(ngx_pool_large_t));
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if (large == NULL) {
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ngx_free(p);
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return NULL;
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}
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large->alloc = p;
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large->next = pool->large;
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pool->large = large;
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return p;
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}
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ngx_int_t
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ngx_pfree(ngx_pool_t *pool, void *p)
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{
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ngx_pool_large_t *l;
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for (l = pool->large; l; l = l->next) {
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if (p == l->alloc) {
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ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0,
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"free: %p", l->alloc);
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ngx_free(l->alloc);
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l->alloc = NULL;
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return NGX_OK;
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}
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}
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return NGX_DECLINED;
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}
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void *
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ngx_pcalloc(ngx_pool_t *pool, size_t size)
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{
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void *p;
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p = ngx_palloc(pool, size);
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if (p) {
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ngx_memzero(p, size);
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}
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return p;
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}
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ngx_pool_cleanup_t *
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ngx_pool_cleanup_add(ngx_pool_t *p, size_t size)
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{
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ngx_pool_cleanup_t *c;
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c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t));
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if (c == NULL) {
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return NULL;
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}
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if (size) {
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c->data = ngx_palloc(p, size);
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if (c->data == NULL) {
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return NULL;
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}
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} else {
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c->data = NULL;
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}
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c->handler = NULL;
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c->next = p->cleanup;
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p->cleanup = c;
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ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c);
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return c;
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}
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void
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ngx_pool_cleanup_file(void *data)
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{
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ngx_pool_cleanup_file_t *c = data;
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ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d",
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c->fd);
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if (ngx_close_file(c->fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed", c->name);
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}
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}
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void
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ngx_pool_delete_file(void *data)
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{
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ngx_pool_cleanup_file_t *c = data;
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ngx_err_t err;
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ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s",
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c->fd, c->name);
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if (ngx_delete_file(c->name) == NGX_FILE_ERROR) {
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err = ngx_errno;
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if (err != NGX_ENOENT) {
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ngx_log_error(NGX_LOG_CRIT, c->log, err,
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ngx_delete_file_n " \"%s\" failed", c->name);
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}
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}
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if (ngx_close_file(c->fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed", c->name);
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}
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}
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#if 0
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static void *
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ngx_get_cached_block(size_t size)
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{
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void *p;
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ngx_cached_block_slot_t *slot;
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if (ngx_cycle->cache == NULL) {
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return NULL;
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}
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slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize];
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slot->tries++;
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if (slot->number) {
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p = slot->block;
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slot->block = slot->block->next;
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slot->number--;
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return p;
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}
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return NULL;
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}
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#endif
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