Mercurial > hg > nginx-quic
view src/core/ngx_crc.h @ 5530:827e53c136b0
SPDY: use ngx_queue_t to queue streams for post processing.
It simplifies the code and allows easy reuse the same queue pointer to store
streams in various queues with different requirements. Future implementation
of SPDY/3.1 will take advantage of this quality.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Mon, 20 Jan 2014 20:56:49 +0400 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_CRC_H_INCLUDED_ #define _NGX_CRC_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> /* 32-bit crc16 */ static ngx_inline uint32_t ngx_crc(u_char *data, size_t len) { uint32_t sum; for (sum = 0; len; len--) { /* * gcc 2.95.2 x86 and icc 7.1.006 compile * that operator into the single "rol" opcode, * msvc 6.0sp2 compiles it into four opcodes. */ sum = sum >> 1 | sum << 31; sum += *data++; } return sum; } #endif /* _NGX_CRC_H_INCLUDED_ */