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annotate src/core/ngx_slab.h @ 6733:adc2414856b1

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Modules compatibility: compatibility with NGX_THREADS. With this change it is now possible to load modules compiled without the "--with-threads" configure option into nginx binary compiled with it, and vice versa (if a module does not use thread-specific functions), assuming both use the "--with-compat" option.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 10 Oct 2016 18:44:17 +0300
parents 25ade23cf281
children 99770a5ea14f
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_SLAB_H_INCLUDED_
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9 #define _NGX_SLAB_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef struct ngx_slab_page_s ngx_slab_page_t;
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18 struct ngx_slab_page_s {
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19 uintptr_t slab;
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20 ngx_slab_page_t *next;
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21 uintptr_t prev;
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22 };
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25 typedef struct {
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26 ngx_shmtx_sh_t lock;
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28 size_t min_size;
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29 size_t min_shift;
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31 ngx_slab_page_t *pages;
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32 ngx_slab_page_t *last;
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33 ngx_slab_page_t free;
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35 u_char *start;
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36 u_char *end;
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37
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38 ngx_shmtx_t mutex;
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40 u_char *log_ctx;
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41 u_char zero;
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42
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43 unsigned log_nomem:1;
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44
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45 void *data;
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46 void *addr;
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47 } ngx_slab_pool_t;
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50 void ngx_slab_init(ngx_slab_pool_t *pool);
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51 void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size);
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52 void *ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size);
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53 void *ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size);
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54 void *ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size);
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55 void ngx_slab_free(ngx_slab_pool_t *pool, void *p);
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56 void ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p);
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59 #endif /* _NGX_SLAB_H_INCLUDED_ */