Mercurial > hg > nginx
annotate src/os/unix/ngx_sunpro_atomic_sparc64.h @ 7948:a2613fc1bce5
Fixed sendfile() limit handling on Linux.
On Linux starting with 2.6.16, sendfile() silently limits all operations
to MAX_RW_COUNT, defined as (INT_MAX & PAGE_MASK). This incorrectly
triggered the interrupt check, and resulted in 0-sized writev() on the
next loop iteration.
Fix is to make sure the limit is always checked, so we will return from
the loop if the limit is already reached even if number of bytes sent is
not exactly equal to the number of bytes we've tried to send.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 29 Oct 2021 20:21:51 +0300 |
parents | d620f497c50f |
children |
rev | line source |
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561 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
561 | 5 */ |
6 | |
7 | |
8 #if (NGX_PTR_SIZE == 4) | |
9 #define NGX_CASA ngx_casa | |
10 #else | |
11 #define NGX_CASA ngx_casxa | |
12 #endif | |
13 | |
14 | |
15 ngx_atomic_uint_t | |
16 ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); | |
17 | |
18 ngx_atomic_uint_t | |
19 ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock); | |
20 | |
21 /* the code in src/os/unix/ngx_sunpro_sparc64.il */ | |
22 | |
23 | |
24 static ngx_inline ngx_atomic_uint_t | |
25 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
26 ngx_atomic_uint_t set) | |
27 { | |
1186
c114defa4518
fix atomic operations on sparc64 built by SunPro C
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
28 set = NGX_CASA(set, old, lock); |
561 | 29 |
30 return (set == old); | |
577 | 31 } |
561 | 32 |
33 | |
34 static ngx_inline ngx_atomic_int_t | |
35 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
36 { | |
37 ngx_atomic_uint_t old, res; | |
38 | |
39 old = *value; | |
40 | |
41 for ( ;; ) { | |
42 | |
43 res = old + add; | |
44 | |
1186
c114defa4518
fix atomic operations on sparc64 built by SunPro C
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
45 res = NGX_CASA(res, old, value); |
561 | 46 |
47 if (res == old) { | |
48 return res; | |
49 } | |
50 | |
51 old = res; | |
52 } | |
53 } | |
563 | 54 |
55 | |
56 #define ngx_memory_barrier() \ | |
57 __asm (".volatile"); \ | |
58 __asm ("membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad"); \ | |
59 __asm (".nonvolatile") | |
611 | 60 |
61 #define ngx_cpu_pause() |