Mercurial > hg > nginx
view src/core/ngx_spinlock.c @ 8887:61b038fb59c6 quic
QUIC: speeding up processing 0-RTT.
After fe919fd63b0b, processing QUIC streams was postponed until after handshake
completion, which means that 0-RTT is effectively off. With ssl_ocsp enabled,
it could be further delayed. This differs from how OCSP validation works with
SSL_read_early_data(). With this change, processing QUIC streams is unlocked
when obtaining 0-RTT secret.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Tue, 26 Oct 2021 17:43:10 +0300 |
parents | f737e406aa68 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin) { #if (NGX_HAVE_ATOMIC_OPS) ngx_uint_t i, n; for ( ;; ) { if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { return; } if (ngx_ncpu > 1) { for (n = 1; n < spin; n <<= 1) { for (i = 0; i < n; i++) { ngx_cpu_pause(); } if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { return; } } } ngx_sched_yield(); } #else #if (NGX_THREADS) #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! #endif #endif }