l4/pkg/l4util/include/ARCH-arm/atomic_arch.h

   1 /**
   2  * \file
   3  * \brief ARM specific implementation of atomic functions
   4  */
   5 /*
   6  * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
   7  *               Alexander Warg <warg@os.inf.tu-dresden.de>
   8  *     economic rights: Technische Universität Dresden (Germany)
   9  * This file is part of TUD:OS and distributed under the terms of the
  10  * GNU Lesser General Public License 2.1.
  11  * Please see the COPYING-LGPL-2.1 file for details.
  12  */
  13 #ifndef __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__
  14 #define __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__
  15
  16 #ifdef __GNUC__
  17
  18 #include <l4/sys/kdebug.h>
  19
  20 EXTERN_C_BEGIN
  21
  22 #define __L4UTIL_ATOMIC_HAVE_ARCH_CMPXCHG32
  23 L4_INLINE int
  24 l4util_cmpxchg32(volatile l4_uint32_t * dest,
  25                  l4_uint32_t cmp_val, l4_uint32_t new_val)
  26 {
  27   return l4_atomic_cmpxchg((volatile long int *)dest, cmp_val, new_val);
  28 }
  29
  30 #define __L4UTIL_ATOMIC_HAVE_ARCH_CMPXCHG
  31 L4_INLINE int
  32 l4util_cmpxchg(volatile l4_umword_t * dest,
  33                l4_umword_t cmp_val, l4_umword_t new_val)
  34 {
  35   return l4_atomic_cmpxchg((volatile long int *)dest, cmp_val, new_val);
  36 }
  37
  38 #define __L4UTIL_ATOMIC_HAVE_ARCH_XCHG32
  39 L4_INLINE l4_uint32_t
  40 l4util_xchg32(volatile l4_uint32_t *dest, l4_uint32_t new_val)
  41 {
  42   return l4_atomic_xchg((volatile long int *)dest, new_val);
  43 }
  44
  45 #define __L4UTIL_ATOMIC_HAVE_ARCH_XCHG
  46 L4_INLINE l4_umword_t
  47 l4util_xchg(volatile l4_umword_t *dest, l4_umword_t new_val)
  48 {
  49   return l4_atomic_xchg((volatile long int *)dest, new_val);
  50 }
  51
  52 #define __L4UTIL_ATOMIC_HAVE_ARCH_ADD
  53 L4_INLINE void
  54 l4util_atomic_add(volatile long *dest, long val)
  55 {
  56   l4_atomic_add(dest, val);
  57 }
  58
  59 #define __L4UTIL_ATOMIC_HAVE_ARCH_INC
  60 L4_INLINE void
  61 l4util_atomic_inc(volatile long *dest)
  62 {
  63   l4_atomic_add(dest, 1);
  64 }
  65
  66 L4_INLINE void
  67 l4util_inc32(volatile l4_uint32_t *dest)
  68 {
  69   l4_atomic_add((volatile long int *)dest, 1);
  70 }
  71
  72 L4_INLINE void
  73 l4util_dec32(volatile l4_uint32_t *dest)
  74 {
  75   l4_atomic_add((volatile long int *)dest, -1);
  76 }
  77
  78
  79 L4_INLINE l4_uint32_t
  80 l4util_inc32_res(volatile l4_uint32_t *dest)
  81 {
  82   return l4_atomic_add((volatile long int *)dest, 1);
  83 }
  84
  85 L4_INLINE l4_uint32_t
  86 l4util_dec32_res(volatile l4_uint32_t *dest)
  87 {
  88   return l4_atomic_add((volatile long int *)dest, -1);
  89 }
  90
  91 EXTERN_C_END
  92
  93 #endif //__GNUC__
  94
  95 #endif /* ! __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__ */