diff options
author | Martin Storsjö <martin@martin.st> | 2022-10-26 10:00:01 +0300 |
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committer | Martin Storsjö <martin@martin.st> | 2022-10-26 16:14:52 +0300 |
commit | 8a4932ff035e2fd2b139caa73f6593c2a4754f67 (patch) | |
tree | 10059c2c8dc866c3ce977a1adfb39370cfb639d7 /include/compat/msvc/stdatomic.h | |
parent | 3e7886db54d0cb3ce32909c71ad2a8c9d9eab223 (diff) |
Implement atomic_compare_exchange_strong in the atomic compat headers
This fixes building with MSVC (and older GCC versions) after
3e7886db54d0cb3ce32909c71ad2a8c9d9eab223.
Diffstat (limited to 'include/compat/msvc/stdatomic.h')
-rw-r--r-- | include/compat/msvc/stdatomic.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/compat/msvc/stdatomic.h b/include/compat/msvc/stdatomic.h index cd04a38..618f0ee 100644 --- a/include/compat/msvc/stdatomic.h +++ b/include/compat/msvc/stdatomic.h @@ -55,6 +55,15 @@ typedef enum { #define atomic_exchange(p_a, v) InterlockedExchange(p_a, v) #define atomic_load_explicit(p_a, mo) atomic_load(p_a) +static inline int atomic_compare_exchange_strong_int(LONG *obj, LONG *expected, + LONG desired) +{ + LONG orig = *expected; + *expected = InterlockedCompareExchange(obj, desired, orig); + return *expected == orig; +} +#define atomic_compare_exchange_strong(p_a, expected, desired) atomic_compare_exchange_strong_int((LONG *)p_a, (LONG *)expected, (LONG)desired) + /* * TODO use a special call to increment/decrement * using InterlockedIncrement/InterlockedDecrement |