libjava/sysdep/sh/locks.h

   1 // locks.h - Thread synchronization primitives. SuperH implementation.
   2
   3 /* Copyright (C) 2002, 2007  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #ifndef __SYSDEP_LOCKS_H__
  12 #define __SYSDEP_LOCKS_H__
  13
  14 typedef size_t obj_addr_t;      /* Integer type big enough for object   */
  15                                 /* address.                             */
  16
  17 inline static bool
  18 compare_and_swap (volatile obj_addr_t *addr, obj_addr_t old,
  19                   obj_addr_t new_val)
  20 {
  21   return __sync_bool_compare_and_swap (addr, old, new_val);
  22 }
  23
  24 inline static void
  25 release_set (volatile obj_addr_t *addr, obj_addr_t new_val)
  26 {
  27   __asm__ __volatile__ (" " : : : "memory");
  28   *(addr) = new_val;
  29 }
  30
  31 inline static bool
  32 compare_and_swap_release (volatile obj_addr_t *addr, obj_addr_t old,
  33                           obj_addr_t new_val)
  34 {
  35   return compare_and_swap (addr, old, new_val);
  36 }
  37
  38 inline static void
  39 read_barrier()
  40 {
  41   __asm__ __volatile__(" " : : : "memory");
  42 }
  43
  44 inline static void
  45 write_barrier()
  46 {
  47   __asm__ __volatile__(" " : : : "memory");
  48 }
  49
  50 #endif /* ! __SYSDEP_LOCKS_H__ */