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libstdc++: Avoid use of hardware interference non-constant [PR102377] 

libstdc++-v3/ChangeLog:

	PR libstdc++/102377
	* include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
	Hardcode to 64 instead of using non-constant constant.
This commit is contained in:
Jonathan Wakely 2021-10-07 18:28:04 +01:00
parent 561078480f
commit 0e90799071
1 changed files with 3 additions and 5 deletions
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8
libstdc++-v3/include/bits/atomic_wait.h
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@ -190,11 +190,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct __waiter_pool_base
{
#ifdef __cpp_lib_hardware_interference_size
static constexpr auto _S_align = hardware_destructive_interference_size;
#else
static constexpr auto _S_align = 64;
#endif
// Don't use std::hardware_destructive_interference_size here because we
// don't want the layout of library types to depend on compiler options.
static constexpr auto _S_align = 64;
alignas(_S_align) __platform_wait_t _M_wait = 0;