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view src/core/ngx_palloc.c @ 6230:2a621245f4cf
Win32: MSVC 2015 compatibility.
Resolved warnings about declarations that hide previous local declarations.
Warnings about WSASocketA() being deprecated resolved by explicit use of
WSASocketW() instead of WSASocket(). When compiling without IPv6 support,
WinSock deprecated warnings are disabled to allow use of gethostbyname().
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 17 Aug 2015 18:09:17 +0300 |
parents | c45c9812cf11 |
children | 6be7e59fdd2c |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> static void *ngx_palloc_block(ngx_pool_t *pool, size_t size); static void *ngx_palloc_large(ngx_pool_t *pool, size_t size); ngx_pool_t * ngx_create_pool(size_t size, ngx_log_t *log) { ngx_pool_t *p; p = ngx_memalign(NGX_POOL_ALIGNMENT, size, log); if (p == NULL) { return NULL; } p->d.last = (u_char *) p + sizeof(ngx_pool_t); p->d.end = (u_char *) p + size; p->d.next = NULL; p->d.failed = 0; size = size - sizeof(ngx_pool_t); p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL; p->current = p; p->chain = NULL; p->large = NULL; p->cleanup = NULL; p->log = log; return p; } void ngx_destroy_pool(ngx_pool_t *pool) { ngx_pool_t *p, *n; ngx_pool_large_t *l; ngx_pool_cleanup_t *c; for (c = pool->cleanup; c; c = c->next) { if (c->handler) { ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "run cleanup: %p", c); c->handler(c->data); } } for (l = pool->large; l; l = l->next) { ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); if (l->alloc) { ngx_free(l->alloc); } } #if (NGX_DEBUG) /* * we could allocate the pool->log from this pool * so we cannot use this log while free()ing the pool */ for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p, unused: %uz", p, p->d.end - p->d.last); if (n == NULL) { break; } } #endif for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { ngx_free(p); if (n == NULL) { break; } } } void ngx_reset_pool(ngx_pool_t *pool) { ngx_pool_t *p; ngx_pool_large_t *l; for (l = pool->large; l; l = l->next) { if (l->alloc) { ngx_free(l->alloc); } } for (p = pool; p; p = p->d.next) { p->d.last = (u_char *) p + sizeof(ngx_pool_t); p->d.failed = 0; } pool->current = pool; pool->chain = NULL; pool->large = NULL; } void * ngx_palloc(ngx_pool_t *pool, size_t size) { u_char *m; ngx_pool_t *p; if (size <= pool->max) { p = pool->current; do { m = ngx_align_ptr(p->d.last, NGX_ALIGNMENT); if ((size_t) (p->d.end - m) >= size) { p->d.last = m + size; return m; } p = p->d.next; } while (p); return ngx_palloc_block(pool, size); } return ngx_palloc_large(pool, size); } void * ngx_pnalloc(ngx_pool_t *pool, size_t size) { u_char *m; ngx_pool_t *p; if (size <= pool->max) { p = pool->current; do { m = p->d.last; if ((size_t) (p->d.end - m) >= size) { p->d.last = m + size; return m; } p = p->d.next; } while (p); return ngx_palloc_block(pool, size); } return ngx_palloc_large(pool, size); } static void * ngx_palloc_block(ngx_pool_t *pool, size_t size) { u_char *m; size_t psize; ngx_pool_t *p, *new; psize = (size_t) (pool->d.end - (u_char *) pool); m = ngx_memalign(NGX_POOL_ALIGNMENT, psize, pool->log); if (m == NULL) { return NULL; } new = (ngx_pool_t *) m; new->d.end = m + psize; new->d.next = NULL; new->d.failed = 0; m += sizeof(ngx_pool_data_t); m = ngx_align_ptr(m, NGX_ALIGNMENT); new->d.last = m + size; for (p = pool->current; p->d.next; p = p->d.next) { if (p->d.failed++ > 4) { pool->current = p->d.next; } } p->d.next = new; return m; } static void * ngx_palloc_large(ngx_pool_t *pool, size_t size) { void *p; ngx_uint_t n; ngx_pool_large_t *large; p = ngx_alloc(size, pool->log); if (p == NULL) { return NULL; } n = 0; for (large = pool->large; large; large = large->next) { if (large->alloc == NULL) { large->alloc = p; return p; } if (n++ > 3) { break; } } large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); if (large == NULL) { ngx_free(p); return NULL; } large->alloc = p; large->next = pool->large; pool->large = large; return p; } void * ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment) { void *p; ngx_pool_large_t *large; p = ngx_memalign(alignment, size, pool->log); if (p == NULL) { return NULL; } large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); if (large == NULL) { ngx_free(p); return NULL; } large->alloc = p; large->next = pool->large; pool->large = large; return p; } ngx_int_t ngx_pfree(ngx_pool_t *pool, void *p) { ngx_pool_large_t *l; for (l = pool->large; l; l = l->next) { if (p == l->alloc) { ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); ngx_free(l->alloc); l->alloc = NULL; return NGX_OK; } } return NGX_DECLINED; } 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; } ngx_pool_cleanup_t * ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) { ngx_pool_cleanup_t *c; c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); if (c == NULL) { return NULL; } if (size) { c->data = ngx_palloc(p, size); if (c->data == NULL) { return NULL; } } else { c->data = NULL; } c->handler = NULL; c->next = p->cleanup; p->cleanup = c; ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); return c; } void ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd) { ngx_pool_cleanup_t *c; ngx_pool_cleanup_file_t *cf; for (c = p->cleanup; c; c = c->next) { if (c->handler == ngx_pool_cleanup_file) { cf = c->data; if (cf->fd == fd) { c->handler(cf); c->handler = NULL; return; } } } } void ngx_pool_cleanup_file(void *data) { ngx_pool_cleanup_file_t *c = data; ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d", c->fd); if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, ngx_close_file_n " \"%s\" failed", c->name); } } void ngx_pool_delete_file(void *data) { ngx_pool_cleanup_file_t *c = data; ngx_err_t err; ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s", c->fd, c->name); if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { err = ngx_errno; if (err != NGX_ENOENT) { ngx_log_error(NGX_LOG_CRIT, c->log, err, ngx_delete_file_n " \"%s\" failed", c->name); } } if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, ngx_close_file_n " \"%s\" failed", c->name); } } #if 0 static void * ngx_get_cached_block(size_t size) { void *p; ngx_cached_block_slot_t *slot; if (ngx_cycle->cache == NULL) { return NULL; } slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; slot->tries++; if (slot->number) { p = slot->block; slot->block = slot->block->next; slot->number--; return p; } return NULL; } #endif