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00019 #ifndef COIL_ATOMIC_H
00020
00021 #ifdef COIL_HAS_ATOMIC_OP
00022
00023 #include <bits/atomicity.h>
00024
00025 #define COIL_USES_ATOMIC_OP
00026 #define atomic_add(x, y) __gnu_cxx::__atomic_add(x, y)
00027 #define atomic_incr(x) __gnu_cxx::__atomic_add(x, 1)
00028 #define atomic_decr(x) __gnu_cxx::__atomic_add(x, -1)
00029 #define atomic_exchange_add(x, y) __gnu_cxx::__exchange_and_add(x, y)
00030 #else
00031
00032 #include <coil/Mutex.h>
00033 #include <coil/Guard.h>
00034 #define COIL_USES_ATOMIC_OP coil::Mutex __mutex;
00035
00036 #define atomic_add(x, y) \
00037 { \
00038 coil::Guard<coil::Mutex> guard(__mutex); \
00039 *x = *x + y; \
00040 }
00041
00042 #define atomic_incr(x) \
00043 { \
00044 coil::Guard<coil::Mutex> guard(__mutex); \
00045 ++(*x); \
00046 }
00047
00048 #define atomic_decr(x) \
00049 { \
00050 coil::Guard<coil::Mutex> guard(__mutex); \
00051 --(*x); \
00052 }
00053
00054 int exchange_add(int* x, int y, coil::Mutex* mutex)
00055 {
00056 coil::Guard<coil::Mutex> guard(*mutex);
00057 int tmp(*x);
00058 *x = *x + y;
00059 return tmp;
00060 }
00061
00062 #define atomic_exchange_add(x, y) \
00063 exchange_add(x, y, &__mutex)
00064
00065 #endif // COIL_HAS_ATOMIC_ADD
00066 #endif // COIL_ATOMIC_H