Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_sunpro_amd64.il @ 4311:45272aab5eea
Unlock of shared memory zones on process crash.
If process exited abnormally while holding lock on some shared memory zone -
unlock it. It may be not safe thing to do (as crash with lock held may
result in corrupted shared memory structure, and other processes will
subsequently crash while trying to access shared data), therefore complain
loudly if unlock succeeds.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 23 Nov 2011 14:09:19 +0000 |
parents | bfd1912e55a9 |
children | d620f497c50f |
rev | line source |
---|---|
561 | 1 / |
2 / Copyright (C) Igor Sysoev | |
3 / | |
4 | |
5 / ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock, | |
6 / ngx_atomic_uint_t old, ngx_atomic_uint_t set); | |
7 / | |
8 / the arguments are passed in %rdi, %rsi, %rdx | |
9 / the result is returned in the %rax | |
10 | |
11 .inline ngx_atomic_cmp_set,0 | |
12 movq %rsi, %rax | |
13 lock | |
14 cmpxchgq %rdx, (%rdi) | |
15 setz %al | |
16 movzbq %al, %rax | |
17 .end | |
18 | |
19 | |
20 / ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value, | |
21 / ngx_atomic_int_t add); | |
22 / | |
23 / the arguments are passed in %rdi, %rsi | |
24 / the result is returned in the %rax | |
25 | |
26 .inline ngx_atomic_fetch_add,0 | |
27 movq %rsi, %rax | |
28 lock | |
29 xaddq %rax, (%rdi) | |
30 .end | |
1309 | 31 |
32 | |
33 / ngx_cpu_pause() | |
3479
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
34 / |
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
35 / the "rep; nop" is used instead of "pause" to avoid the "[ PAUSE ]" hardware |
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
36 / capability added by linker because Solaris/amd64 does not know about it: |
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
37 / |
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
38 / ld.so.1: nginx: fatal: hardware capability unsupported: 0x2000 [ PAUSE ] |
1309 | 39 |
40 .inline ngx_cpu_pause,0 | |
3479
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
41 rep; nop |
1309 | 42 .end |