Mercurial > hg > nginx-quic
view src/core/ngx_regex.h @ 8759:56dec0d4e5b1 quic
QUIC: avoid excessive buffer allocations in stream output.
Previously, when a few bytes were send to a QUIC stream by the application, a
4K buffer was allocated for these bytes. Then a STREAM frame was created and
that entire buffer was used as data for that frame. The frame with the buffer
were in use up until the frame was acked by client. Meanwhile, when more
bytes were send to the stream, more buffers were allocated and assigned as
data to newer STREAM frames. In this scenario most buffer memory is unused.
Now the unused part of the stream output buffer is available for further
stream output while earlier parts of the buffer are waiting to be acked.
This is achieved by splitting the output buffer.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 24 Dec 2021 18:13:51 +0300 |
parents | 6e1a48bcf915 |
children | 0b5f12d5c531 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_REGEX_H_INCLUDED_ #define _NGX_REGEX_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <pcre.h> #define NGX_REGEX_NO_MATCHED PCRE_ERROR_NOMATCH /* -1 */ #define NGX_REGEX_CASELESS PCRE_CASELESS typedef struct { pcre *code; pcre_extra *extra; } ngx_regex_t; typedef struct { ngx_str_t pattern; ngx_pool_t *pool; ngx_int_t options; ngx_regex_t *regex; int captures; int named_captures; int name_size; u_char *names; ngx_str_t err; } ngx_regex_compile_t; typedef struct { ngx_regex_t *regex; u_char *name; } ngx_regex_elt_t; void ngx_regex_init(void); ngx_int_t ngx_regex_compile(ngx_regex_compile_t *rc); #define ngx_regex_exec(re, s, captures, size) \ pcre_exec(re->code, re->extra, (const char *) (s)->data, (s)->len, 0, 0, \ captures, size) #define ngx_regex_exec_n "pcre_exec()" ngx_int_t ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log); #endif /* _NGX_REGEX_H_INCLUDED_ */