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 Technische Universität Dresden
   7  * This file is part of TUD:OS and distributed under the terms of the
   8  * GNU Lesser General Public License 2.1.
   9  * Please see the COPYING-LGPL-2.1 file for details.
  10  */
  11 #ifndef __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__
  12 #define __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__
  13
  14 #ifdef __GNUC__
  15
  16 #include <l4/sys/kdebug.h>
  17
  18 EXTERN_C_BEGIN
  19
  20 #define __L4UTIL_ATOMIC_HAVE_ARCH_CMPXCHG32
  21 L4_INLINE int
  22 l4util_cmpxchg32(volatile l4_uint32_t * dest,
  23                  l4_uint32_t cmp_val, l4_uint32_t new_val)
  24 {
  25   return l4_atomic_cmpxchg((volatile long int *)dest, cmp_val, new_val);
  26 }
  27
  28 #define __L4UTIL_ATOMIC_HAVE_ARCH_CMPXCHG
  29 L4_INLINE int
  30 l4util_cmpxchg(volatile l4_umword_t * dest,
  31                l4_umword_t cmp_val, l4_umword_t new_val)
  32 {
  33   return l4_atomic_cmpxchg((volatile long int *)dest, cmp_val, new_val);
  34 }
  35
  36 #define __L4UTIL_ATOMIC_HAVE_ARCH_ADD
  37 L4_INLINE void
  38 l4util_atomic_add(volatile long *dest, long val)
  39 {
  40   l4_atomic_add(dest, val);
  41 }
  42
  43 #define __L4UTIL_ATOMIC_HAVE_ARCH_INC
  44 L4_INLINE void
  45 l4util_atomic_inc(volatile long *dest)
  46 {
  47   l4_atomic_add(dest, 1);
  48 }
  49
  50 L4_INLINE void
  51 l4util_inc32(volatile l4_uint32_t *dest)
  52 {
  53   l4_atomic_add((volatile long int *)dest, 1);
  54 }
  55
  56 L4_INLINE void
  57 l4util_dec32(volatile l4_uint32_t *dest)
  58 {
  59   l4_atomic_add((volatile long int *)dest, -1);
  60 }
  61
  62
  63 L4_INLINE l4_uint32_t
  64 l4util_inc32_res(volatile l4_uint32_t *dest)
  65 {
  66   return l4_atomic_add((volatile long int *)dest, 1);
  67 }
  68
  69 L4_INLINE l4_uint32_t
  70 l4util_dec32_res(volatile l4_uint32_t *dest)
  71 {
  72   return l4_atomic_add((volatile long int *)dest, -1);
  73 }
  74
  75 EXTERN_C_END
  76
  77 #endif //__GNUC__
  78
  79 #endif /* ! __L4UTIL__INCLUDE__ARCH_ARM__ATOMIC_ARCH_H__ */