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| author | ylavic <ylavic@13f79535-47bb-0310-9956-ffa450edef68> | 2022-01-07 15:26:21 +0000 |
|---|---|---|
| committer | ylavic <ylavic@13f79535-47bb-0310-9956-ffa450edef68> | 2022-01-07 15:26:21 +0000 |
| commit | 3d52c895b8d99bbf8fdedd0a12db5b52cb5a12b6 (patch) | |
| tree | 5e64d05b21a7e859e99508f4e15b9754e0ab1c72 | |
| parent | 1d281929ca47822d9d4fd78cdfb69def81cbe1d9 (diff) | |
| download | libapr-3d52c895b8d99bbf8fdedd0a12db5b52cb5a12b6.tar.gz | |
apr_atomic_set64: Follow up to r1868129.
Like for apr_atomic_read64() in r1868502, use direct memory write on x86_x64.
git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1896811 13f79535-47bb-0310-9956-ffa450edef68
| -rw-r--r-- | atomic/win32/apr_atomic64.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/atomic/win32/apr_atomic64.c b/atomic/win32/apr_atomic64.c index 372003aaa..a9139d96a 100644 --- a/atomic/win32/apr_atomic64.c +++ b/atomic/win32/apr_atomic64.c @@ -46,7 +46,14 @@ APR_DECLARE(int) apr_atomic_dec64(volatile apr_uint64_t *mem) APR_DECLARE(void) apr_atomic_set64(volatile apr_uint64_t *mem, apr_uint64_t val) { +#if defined(_M_X64) + /* https://docs.microsoft.com/en-us/windows/win32/sync/interlocked-variable-access + * "Simple reads and writes to properly aligned 64-bit variables are atomic + * on 64-bit Windows."*/ + *mem = val; +#else InterlockedExchange64((volatile LONG64 *)mem, val); +#endif } APR_DECLARE(apr_uint64_t) apr_atomic_read64(volatile apr_uint64_t *mem) |