ngx_sunpro_atomic_sparc64.h revision e18a033b
1
2/*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
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
15ngx_atomic_uint_t
16ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock);
17
18ngx_atomic_uint_t
19ngx_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
24static ngx_inline ngx_atomic_uint_t
25ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old,
26    ngx_atomic_uint_t set)
27{
28    set = NGX_CASA(set, old, lock);
29
30    return (set == old);
31}
32
33
34static ngx_inline ngx_atomic_int_t
35ngx_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
45        res = NGX_CASA(res, old, value);
46
47        if (res == old) {
48            return res;
49        }
50
51        old = res;
52    }
53}
54
55
56#define ngx_memory_barrier()                                                  \
57        __asm (".volatile");                                                  \
58        __asm ("membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad");   \
59        __asm (".nonvolatile")
60
61#define ngx_cpu_pause()
62