Mercurial > hg > nginx-vendor-0-7
annotate src/core/ngx_spinlock.c @ 22:8b6db3bda591 NGINX_0_1_11
nginx 0.1.11
*) Feature: the worker_priority directive.
*) Change: both tcp_nopush and tcp_nodelay directives affect the
transferred response.
*) Bugfix: nginx did not call initgroups().
Thanks to Andrew Sitnikov and Andrei Nigmatulin.
*) Change: now the ngx_http_autoindex_module shows the file size in the
bytes.
*) Bugfix: the ngx_http_autoindex_module returned the 500 error if the
broken symlink was in a directory.
*) Bugfix: the files bigger than 4G could not be transferred using
sendfile.
*) Bugfix: if the backend was resolved to several backends and there
was an error while the response waiting then process may got caught
in an endless loop.
*) Bugfix: the worker process may exit with the "unknown cycle" message
when the /dev/poll method was used.
*) Bugfix: "close() channel failed" errors.
*) Bugfix: the autodetection of the "nobody" and "nogroup" groups.
*) Bugfix: the send_lowat directive did not work on Linux.
*) Bugfix: the segmentation fault occurred if there was no events
section in configuration.
*) Bugfix: nginx could not be built on OpenBSD.
*) Bugfix: the double slashes in "://" in the URI were converted to
":/".
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Thu, 02 Dec 2004 00:00:00 +0300 |
parents | f0b350454894 |
children | 41ccba1aba45 |
rev | line source |
---|---|
0 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 | |
10 | |
11 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin) | |
12 { | |
13 | |
14 #if (NGX_HAVE_ATOMIC_OPS) | |
15 | |
16 ngx_uint_t tries; | |
17 | |
18 tries = 0; | |
19 | |
20 for ( ;; ) { | |
21 | |
22 if (*lock) { | |
23 if (ngx_ncpu > 1 && tries++ < spin) { | |
24 continue; | |
25 } | |
26 | |
27 ngx_sched_yield(); | |
28 | |
29 tries = 0; | |
30 | |
31 } else { | |
32 if (ngx_atomic_cmp_set(lock, 0, 1)) { | |
33 return; | |
34 } | |
35 } | |
36 } | |
37 | |
38 #else | |
39 | |
40 #if (NGX_THREADS) | |
41 | |
42 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! | |
43 | |
44 #endif | |
45 | |
46 #endif | |
47 | |
48 } |