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64 lines
1.6 KiB
C
64 lines
1.6 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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#ifndef _NGX_QUEUE_H_INCLUDED_
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#define _NGX_QUEUE_H_INCLUDED_
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typedef struct ngx_queue_s ngx_queue_t;
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struct ngx_queue_s {
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ngx_queue_t *prev;
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ngx_queue_t *next;
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};
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#define ngx_queue_empty(h) \
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(h == (h)->prev)
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#define ngx_queue_insert_head(h, x) \
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(x)->next = (h)->next; \
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(x)->next->prev = x; \
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(x)->prev = h; \
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(h)->next = x
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#define ngx_queue_head(h) \
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(h)->next
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#define ngx_queue_last(h) \
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(h)->prev
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#if (NGX_DEBUG)
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#define ngx_queue_remove(x) \
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(x)->next->prev = (x)->prev; \
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(x)->prev->next = (x)->next; \
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(x)->prev = NULL; \
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(x)->next = NULL
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#else
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#define ngx_queue_remove(x) \
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(x)->next->prev = (x)->prev; \
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(x)->prev->next = (x)->next
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#endif
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#define ngx_queue_data(q, type, link) \
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(type *) ((u_char *) q - offsetof(type, link))
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#endif /* _NGX_QUEUE_H_INCLUDED_ */
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