Mercurial > hg > nginx
view src/core/ngx_spinlock.c @ 9277:4a0cd107c0f1 default tip
HTTP/2: handling of connections initialized during shutdown.
If an HTTP/2 connection opened before a graceful shutdown, but
ngx_http_v2_init() is called after idle connections were closed, such
a connection ended up being open till closed by the client (or up to
keepalive_time), delaying shutdown.
With this change, such connections are allowed to serve just one request,
much like it happens in HTTP/1.x, and closed afterwards.
Reported by Kasei Wang,
https://freenginx.org/pipermail/nginx-devel/2024-May/000277.html
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 28 May 2024 20:43:50 +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 }