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src/core/ngx_buf.h - nginx source code
Data types defined
Macros defined
Source code
- #ifndef _NGX_BUF_H_INCLUDED_
- #define _NGX_BUF_H_INCLUDED_
- #include <ngx_config.h>
- #include <ngx_core.h>
- typedef void * ngx_buf_tag_t;
- typedef struct ngx_buf_s ngx_buf_t;
- struct ngx_buf_s {
- u_char *pos;
- u_char *last;
- off_t file_pos;
- off_t file_last;
- u_char *start;
- u_char *end;
- ngx_buf_tag_t tag;
- ngx_file_t *file;
- ngx_buf_t *shadow;
-
- unsigned temporary:1;
-
- unsigned memory:1;
-
- unsigned mmap:1;
- unsigned recycled:1;
- unsigned in_file:1;
- unsigned flush:1;
- unsigned sync:1;
- unsigned last_buf:1;
- unsigned last_in_chain:1;
- unsigned last_shadow:1;
- unsigned temp_file:1;
- int num;
- };
- struct ngx_chain_s {
- ngx_buf_t *buf;
- ngx_chain_t *next;
- };
- typedef struct {
- ngx_int_t num;
- size_t size;
- } ngx_bufs_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);
- typedef void (*ngx_output_chain_aio_pt)(ngx_output_chain_ctx_t *ctx,
- ngx_file_t *file);
- struct ngx_output_chain_ctx_s {
- ngx_buf_t *buf;
- ngx_chain_t *in;
- ngx_chain_t *free;
- ngx_chain_t *busy;
- unsigned sendfile:1;
- unsigned directio:1;
- unsigned unaligned:1;
- unsigned need_in_memory:1;
- unsigned need_in_temp:1;
- unsigned aio:1;
- #if (NGX_HAVE_FILE_AIO || NGX_COMPAT)
- ngx_output_chain_aio_pt aio_handler;
- #endif
- #if (NGX_THREADS || NGX_COMPAT)
- ngx_int_t (*thread_handler)(ngx_thread_task_t *task,
- ngx_file_t *file);
- ngx_thread_task_t *thread_task;
- #endif
- off_t alignment;
- ngx_pool_t *pool;
- ngx_int_t allocated;
- ngx_bufs_t bufs;
- ngx_buf_tag_t tag;
- ngx_output_chain_filter_pt output_filter;
- void *filter_ctx;
- };
- typedef struct {
- ngx_chain_t *out;
- ngx_chain_t **last;
- ngx_connection_t *connection;
- ngx_pool_t *pool;
- off_t limit;
- } ngx_chain_writer_ctx_t;
- #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) \
- (((b)->flush || (b)->last_buf || (b)->sync) \
- && !ngx_buf_in_memory(b) && !(b)->in_file)
- #define ngx_buf_sync_only(b) \
- ((b)->sync && !ngx_buf_in_memory(b) \
- && !(b)->in_file && !(b)->flush && !(b)->last_buf)
- #define ngx_buf_size(b) \
- (ngx_buf_in_memory(b) ? (off_t) ((b)->last - (b)->pos): \
- ((b)->file_last - (b)->file_pos))
- 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);
- #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t))
- #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t))
- ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool);
- #define ngx_free_chain(pool, cl) \
- (cl)->next = (pool)->chain; \
- (pool)->chain = (cl)
- 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);
- off_t ngx_chain_coalesce_file(ngx_chain_t **in, off_t limit);
- ngx_chain_t *ngx_chain_update_sent(ngx_chain_t *in, off_t sent);
- #endif
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