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Template CompareAndSwap function.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2009-05-19 01:02:27 +00:00
parent f4786cc07a
commit 03462230c7
1 changed files with 12 additions and 9 deletions
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21
include/llvm/System/Atomic.h
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@ -44,24 +44,27 @@ namespace llvm {
#if !defined(ENABLE_THREADS) || ENABLE_THREADS == 0
typedef unsigned long cas_flag;
inline cas_flag CompareAndSwap(cas_flag* dest, cas_flag exc, cas_flag c) {
cas_flag result = *dest;
template<typename T>
inline T CompareAndSwap(volatile T* dest,
T exc, T c) {
T result = *dest;
if (result == c)
*dest = exc;
return result;
}
#elif defined(__GNUC__)
typedef unsigned long cas_flag;
inline cas_flag CompareAndSwap(cas_flag* ptr,
cas_flag new_value,
cas_flag old_value) {
template<typename T>
inline T CompareAndSwap(volatile T* ptr,
T new_value,
T old_value) {
return __sync_val_compare_and_swap(ptr, old_value, new_value);
}
#elif defined(_MSC_VER) && _M_IX86 > 400
#elif defined(_MSC_VER)
typedef LONG cas_flag;
inline cas_flag CompareAndSwap(cas_flag* ptr,
cas_flag new_value,
cas_flag old_value) {
inline T CompareAndSwap(volatile T* ptr,
T new_value,
T old_value) {
return InterlockedCompareExchange(addr, new_value, old_value);
}
#else