Mercurial > hg > nginx-quic
view src/core/ngx_crc.h @ 8685:e2ec952dc295 quic
QUIC: fixed removal of unused client IDs.
If client ID was never used, its refcount is zero. To keep things simple,
the ngx_quic_unref_client_id() function is now aware of such IDs.
If client ID was used, the ngx_quic_replace_retired_client_id() function
is supposed to find all users and unref the ID, thus ngx_quic_unref_client_id()
should not be called after it.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 13 Oct 2021 14:48:33 +0300 |
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_ */