ngx_buf.h File Reference

#include <ngx_config.h>
#include <ngx_core.h>

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Data Structures
struct	ngx_buf_s
struct	ngx_chain_s
struct	ngx_bufs_t
struct	ngx_output_chain_ctx_s
struct	ngx_chain_writer_ctx_t

Macros
#define	NGX_CHAIN_ERROR   (ngx_chain_t *) NGX_ERROR
#define	ngx_buf_in_memory(b)   (b->temporary || b->memory || b->mmap)
#define	ngx_buf_in_memory_only(b)   (ngx_buf_in_memory(b) && !b->in_file)
#define	ngx_buf_special(b)
#define	ngx_buf_sync_only(b)
#define	ngx_buf_size(b)
#define	ngx_alloc_buf(pool)   ngx_palloc(pool, sizeof(ngx_buf_t))
#define	ngx_calloc_buf(pool)   ngx_pcalloc(pool, sizeof(ngx_buf_t))
#define	ngx_free_chain(pool, cl)

Typedefs
typedef void *	ngx_buf_tag_t
typedef struct ngx_buf_s	ngx_buf_t
typedef struct ngx_output_chain_ctx_s	ngx_output_chain_ctx_t
typedef ngx_int_t(*	ngx_output_chain_filter_pt )(void *ctx, ngx_chain_t *in)

Functions
ngx_buf_t *	ngx_create_temp_buf (ngx_pool_t *pool, size_t size)
ngx_chain_t *	ngx_create_chain_of_bufs (ngx_pool_t *pool, ngx_bufs_t *bufs)
ngx_chain_t *	ngx_alloc_chain_link (ngx_pool_t *pool)
ngx_int_t	ngx_output_chain (ngx_output_chain_ctx_t *ctx, ngx_chain_t *in)
ngx_int_t	ngx_chain_writer (void *ctx, ngx_chain_t *in)
ngx_int_t	ngx_chain_add_copy (ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
ngx_chain_t *	ngx_chain_get_free_buf (ngx_pool_t *p, ngx_chain_t **free)
void	ngx_chain_update_chains (ngx_pool_t *p, ngx_chain_t **free, ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag)

Macro Definition Documentation

#define ngx_alloc_buf

(

pool

)

ngx_palloc(pool, sizeof(ngx_buf_t))

Definition at line 142 of file ngx_buf.h.

#define ngx_buf_in_memory

(

b

)

(b->temporary || b->memory || b->mmap)

Definition at line 123 of file ngx_buf.h.

#define ngx_buf_in_memory_only

(

b

)

(ngx_buf_in_memory(b) && !b->in_file)

Definition at line 124 of file ngx_buf.h.

#define ngx_buf_size

(

b

)

Value:

(ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos):                      \
                            (b->file_last - b->file_pos))

Definition at line 134 of file ngx_buf.h.

#define ngx_buf_special

(

b

)

Value:

((b->flush || b->last_buf || b->sync)                                    \
     && !ngx_buf_in_memory(b) && !b->in_file)

Definition at line 126 of file ngx_buf.h.

#define ngx_buf_sync_only

(

b

)

Value:

(b->sync                                                                 \
     && !ngx_buf_in_memory(b) && !b->in_file && !b->flush && !b->last_buf)

Definition at line 130 of file ngx_buf.h.

#define ngx_calloc_buf

(

pool

)

ngx_pcalloc(pool, sizeof(ngx_buf_t))

Definition at line 143 of file ngx_buf.h.

#define NGX_CHAIN_ERROR   (ngx_chain_t *) NGX_ERROR

Definition at line 120 of file ngx_buf.h.

#define ngx_free_chain	(		pool,
			cl
	)

Value:

cl->next = pool->chain;                                                  \
    pool->chain = cl

Definition at line 146 of file ngx_buf.h.

Typedef Documentation

typedef struct ngx_buf_s ngx_buf_t

Definition at line 18 of file ngx_buf.h.

typedef void* ngx_buf_tag_t

Definition at line 16 of file ngx_buf.h.

typedef struct ngx_output_chain_ctx_s ngx_output_chain_ctx_t

Definition at line 71 of file ngx_buf.h.

typedef ngx_int_t(* ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in)

Definition at line 73 of file ngx_buf.h.

Function Documentation

ngx_chain_t* ngx_alloc_chain_link

(

ngx_pool_t *

pool

)

Definition at line 48 of file ngx_buf.c.

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ngx_int_t ngx_chain_add_copy	(	ngx_pool_t *	pool,
		ngx_chain_t **	chain,
		ngx_chain_t *	in
	)

Definition at line 127 of file ngx_buf.c.

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ngx_chain_t* ngx_chain_get_free_buf	(	ngx_pool_t *	p,
		ngx_chain_t **	free
	)

Definition at line 156 of file ngx_buf.c.

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void ngx_chain_update_chains	(	ngx_pool_t *	p,
		ngx_chain_t **	free,
		ngx_chain_t **	busy,
		ngx_chain_t **	out,
		ngx_buf_tag_t	tag
	)

Definition at line 184 of file ngx_buf.c.

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ngx_int_t ngx_chain_writer	(	void *	ctx,
		ngx_chain_t *	in
	)

Definition at line 602 of file ngx_output_chain.c.

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ngx_chain_t* ngx_create_chain_of_bufs	(	ngx_pool_t *	pool,
		ngx_bufs_t *	bufs
	)

Definition at line 69 of file ngx_buf.c.

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ngx_buf_t* ngx_create_temp_buf	(	ngx_pool_t *	pool,
		size_t	size
	)

Definition at line 13 of file ngx_buf.c.

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ngx_int_t ngx_output_chain	(	ngx_output_chain_ctx_t *	ctx,
		ngx_chain_t *	in
	)

Definition at line 42 of file ngx_output_chain.c.

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