release/src/router/nginx/src/os/unix/ngx_sunpro_atomic_sparc64.h

   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
  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 {
  28     set = NGX_CASA(set, old, lock);
  29
  30     return (set == old);
  31 }
  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
  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()