Mercurial > hg > nginx-quic
view src/core/ngx_palloc.c @ 781:836f099aa5cb
allow ranges for full flv files
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 16 Oct 2006 07:47:00 +0000 |
parents | 65bf042c0b4f |
children | 201d017ea470 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> ngx_pool_t * ngx_create_pool(size_t size, ngx_log_t *log) { ngx_pool_t *p; p = ngx_alloc(size, log); if (p == NULL) { return NULL; } p->last = (u_char *) p + sizeof(ngx_pool_t); p->end = (u_char *) p + size; p->current = p; p->chain = NULL; p->next = 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) { 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 can not use this log while the free()ing the pool */ for (p = pool, n = pool->next; /* void */; p = n, n = n->next) { ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p, unused: %uz", p, p->end - p->last); if (n == NULL) { break; } } #endif for (p = pool, n = pool->next; /* void */; p = n, n = n->next) { ngx_free(p); if (n == NULL) { break; } } } void * ngx_palloc(ngx_pool_t *pool, size_t size) { u_char *m; ngx_pool_t *p, *n; ngx_pool_large_t *large; if (size <= (size_t) NGX_MAX_ALLOC_FROM_POOL && size <= (size_t) (pool->end - (u_char *) pool) - (size_t) ngx_align_ptr(sizeof(ngx_pool_t), NGX_ALIGNMENT)) { for (p = pool->current; /* void */ ; p = p->next) { if (size < sizeof(int) || (size & 1)) { m = p->last; } else { m = ngx_align_ptr(p->last, NGX_ALIGNMENT); } if ((size_t) (p->end - m) >= size) { p->last = m + size; return m; } if ((size_t) (p->end - m) < NGX_ALIGNMENT) { pool->current = p->next; } if (p->next == NULL) { break; } } /* allocate a new pool block */ n = ngx_create_pool((size_t) (p->end - (u_char *) p), p->log); if (n == NULL) { return NULL; } if (pool->current == NULL) { pool->current = n; } p->next = n; m = ngx_align_ptr(n->last, NGX_ALIGNMENT); n->last = m + size; return m; } #if 0 p = ngx_memalign(ngx_pagesize, size, pool->log); if (p == NULL) { return NULL; } #else p = ngx_alloc(size, pool->log); if (p == NULL) { return NULL; } #endif large = ngx_palloc(pool, sizeof(ngx_pool_large_t)); if (large == NULL) { 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; } void * ngx_shalloc(size_t size) { u_char *p; if (size < sizeof(int) || (size & 1)) { p = ngx_cycle->shm_last; } else { p = ngx_align_ptr(ngx_cycle->shm_last, NGX_ALIGNMENT); } if ((size_t) (ngx_cycle->shm_end - p) >= size) { ngx_cycle->shm_last = p + size; return p; } ngx_log_error(NGX_LOG_EMERG, ngx_cycle->log, 0, "allocation of %uz bytes in shared memory failed, " "only %uz are available", size, ngx_cycle->shm_end - ngx_cycle->shm_last); return NULL; } void * ngx_shcalloc(size_t size) { void *p; p = ngx_shalloc(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_cleanup_file(void *data) { ngx_pool_cleanup_file_t *c = data; ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "run cleanup: %p, fd:%d", c, 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); } } #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