Mercurial > hg > nginx
annotate src/core/ngx_spinlock.c @ 7525:575480d3fd01
Perl: propagate errors.
When an error happens, the ctx->error bit is now set, and croak()
is called to terminate further processing. The ctx->error bit is
checked in ngx_http_perl_call_handler() to cancel further processing,
and is also checked in various output functions - to make sure these won't
be called if croak() was handled by an eval{} in perl code.
In particular, this ensures that output chain won't be called after
errors, as filters might not expect this to happen. This fixes some
segmentation faults under low memory conditions. Also this stops
request processing after filter finalization or request body reading
errors.
For cases where an HTTP error status can be additionally returned (for
example, 416 (Requested Range Not Satisfiable) from the range filter),
the ctx->status field is also added.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 12 Jul 2019 13:56:21 +0300 |
parents | f737e406aa68 |
children |
rev | line source |
---|---|
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
1 |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
2 /* |
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
441
diff
changeset
|
3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
5 */ |
da8c5707af39
nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents:
435
diff
changeset
|
6 |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
7 |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
8 #include <ngx_config.h> |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
363
diff
changeset
|
9 #include <ngx_core.h> |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
10 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
11 |
563 | 12 void |
611 | 13 ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin) |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
14 { |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
15 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
16 #if (NGX_HAVE_ATOMIC_OPS) |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
17 |
611 | 18 ngx_uint_t i, n; |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
19 |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
20 for ( ;; ) { |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
21 |
611 | 22 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { |
23 return; | |
24 } | |
25 | |
26 if (ngx_ncpu > 1) { | |
27 | |
28 for (n = 1; n < spin; n <<= 1) { | |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
29 |
611 | 30 for (i = 0; i < n; i++) { |
31 ngx_cpu_pause(); | |
32 } | |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
33 |
611 | 34 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) { |
35 return; | |
36 } | |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
37 } |
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
38 } |
611 | 39 |
40 ngx_sched_yield(); | |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
41 } |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
42 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
43 #else |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
44 |
6072
f737e406aa68
Core: guard against spinlock usage without atomic ops.
Ruslan Ermilov <ru@nginx.com>
parents:
6016
diff
changeset
|
45 #if (NGX_THREADS) |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
46 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
47 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined ! |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
48 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
49 #endif |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
50 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
51 #endif |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
373
diff
changeset
|
52 |
363
f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
53 } |