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/*
* Copyright (C) Igor Sysoev
*/
#if (NGX_PTR_SIZE == 4)
#define NGX_CASA ngx_casa
#else
#define NGX_CASA ngx_casxa
#endif
ngx_atomic_uint_t
ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock);
ngx_atomic_uint_t
ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, ngx_atomic_t *lock);
/* the code in src/os/unix/ngx_sunpro_sparc64.il */
static ngx_inline ngx_atomic_uint_t
ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old,
ngx_atomic_uint_t set)
{
NGX_CASA(set, old, lock);
return (set == old);
}
static ngx_inline ngx_atomic_int_t
ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add)
{
ngx_atomic_uint_t old, res;
old = *value;
for ( ;; ) {
res = old + add;
NGX_CASA(res, old, value);
if (res == old) {
return res;
}
old = res;
}
}
#define ngx_memory_barrier() \
__asm (".volatile"); \
__asm ("membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad"); \
__asm (".nonvolatile")
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