Mercurial > hg > nginx
diff src/core/ngx_queue.h @ 1646:9638a809d3cd
ngx_queue.h
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 23 Nov 2007 16:32:50 +0000 |
parents | |
children | d95dea42c33f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/core/ngx_queue.h Fri Nov 23 16:32:50 2007 +0000 @@ -0,0 +1,63 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +#ifndef _NGX_QUEUE_H_INCLUDED_ +#define _NGX_QUEUE_H_INCLUDED_ + + +typedef struct ngx_queue_s ngx_queue_t; + +struct ngx_queue_s { + ngx_queue_t *prev; + ngx_queue_t *next; +}; + + +#define ngx_queue_empty(h) \ + (h == (h)->prev) + + +#define ngx_queue_insert_head(h, x) \ + (x)->next = (h)->next; \ + (x)->next->prev = x; \ + (x)->prev = h; \ + (h)->next = x + + +#define ngx_queue_head(h) \ + (h)->next + + +#define ngx_queue_last(h) \ + (h)->prev + + +#if (NGX_DEBUG) + +#define ngx_queue_remove(x) \ + (x)->next->prev = (x)->prev; \ + (x)->prev->next = (x)->next; \ + (x)->prev = NULL; \ + (x)->next = NULL + +#else + +#define ngx_queue_remove(x) \ + (x)->next->prev = (x)->prev; \ + (x)->prev->next = (x)->next + +#endif + + +#define ngx_queue_data(q, type, link) \ + (type *) ((u_char *) q - offsetof(type, link)) + + +#endif /* _NGX_QUEUE_H_INCLUDED_ */