30 #ifndef _GLIBCXX_ATOMICITY_H
31 #define _GLIBCXX_ATOMICITY_H 1
34 #include <bits/gthr.h>
37 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
43 #ifdef _GLIBCXX_ATOMIC_BUILTINS_4
44 static inline _Atomic_word
45 __exchange_and_add(
volatile _Atomic_word* __mem,
int __val)
46 {
return __sync_fetch_and_add(__mem, __val); }
49 __atomic_add(
volatile _Atomic_word* __mem,
int __val)
50 { __sync_fetch_and_add(__mem, __val); }
53 __attribute__ ((__unused__))
54 __exchange_and_add(volatile _Atomic_word*,
int);
57 __attribute__ ((__unused__))
58 __atomic_add(volatile _Atomic_word*,
int);
61 static inline _Atomic_word
62 __exchange_and_add_single(_Atomic_word* __mem,
int __val)
64 _Atomic_word __result = *__mem;
70 __atomic_add_single(_Atomic_word* __mem,
int __val)
73 static inline _Atomic_word
74 __attribute__ ((__unused__))
75 __exchange_and_add_dispatch(_Atomic_word* __mem,
int __val)
78 if (__gthread_active_p())
79 return __exchange_and_add(__mem, __val);
81 return __exchange_and_add_single(__mem, __val);
83 return __exchange_and_add_single(__mem, __val);
88 __attribute__ ((__unused__))
89 __atomic_add_dispatch(_Atomic_word* __mem,
int __val)
92 if (__gthread_active_p())
93 __atomic_add(__mem, __val);
95 __atomic_add_single(__mem, __val);
97 __atomic_add_single(__mem, __val);
101 _GLIBCXX_END_NAMESPACE
106 #ifndef _GLIBCXX_READ_MEM_BARRIER
107 #define _GLIBCXX_READ_MEM_BARRIER __asm __volatile ("":::"memory")
109 #ifndef _GLIBCXX_WRITE_MEM_BARRIER
110 #define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("":::"memory")