Revert "Make the constexpr mutex constructor opt-in (#4000)" #4339
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This reverts commit 782dcd5. Fixes microsoft#4338
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This is possible now that @amyw-msft merged her MSVC-PR-519388 "Update crt140 nuget package to version 33321 (17.9p2)" today. Thanks for taking care of this @CaseyCarter, it was on my list of things to do today and I didn't know it would take extra effort beyond a plain revert 😻 |
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#4000 was me, so I felt obliged to fix the damage I did to the STL =) |
StephanTLavavej
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Jan 24, 2024
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Pushed comment changes! |
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I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed. |
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Thanks for undoing your undo! 🔁 😻 🎉 |
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narknon
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Jun 22, 2024
microsoft/STL#3824 microsoft/STL#4000 microsoft/STL#4339 Add escape hatch due to STL change resulting in issues with binary compatibility. https://github.com/microsoft/STL/wiki/Changelog "Fixed bugs: Fixed mutex's constructor to be constexpr. #3824 #4000 #4339 Note: Programs that aren't following the documented restrictions on binary compatibility may encounter null dereferences in mutex machinery. You must follow this rule: When you mix binaries built by different supported versions of the toolset, the Redistributable version must be at least as new as the latest toolset used by any app component. You can define _DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR as an escape hatch."
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narknon
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Jun 27, 2024
STL updates Mutex Fix microsoft/STL#3824 microsoft/STL#4000 microsoft/STL#4339 Add escape hatch due to STL change resulting in issues with binary compatibility. https://github.com/microsoft/STL/wiki/Changelog "Fixed bugs: Fixed mutex's constructor to be constexpr. #3824 #4000 #4339 Note: Programs that aren't following the documented restrictions on binary compatibility may encounter null dereferences in mutex machinery. You must follow this rule: When you mix binaries built by different supported versions of the toolset, the Redistributable version must be at least as new as the latest toolset used by any app component. You can define _DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR as an escape hatch."**Description**
kirides
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May 8, 2025
Merge SaiyansKing readme changes and workaround for old "critical section" usage, update readme - Add Linux Wine Example - Update readme - @SaiyansKing fixed possible crash with mutex usage on newer c++: > VS 2022 17.10: > > - Fixed bugs: > - Fixed mutex's constructor to be constexpr. [#3824](microsoft/STL#3824) [#4000](microsoft/STL#4000) [#4339](microsoft/STL#4339) Note: Programs that aren't following the documented [restrictions on binary compatibility](https://learn.microsoft.com/en-us/cpp/porting/binary-compat-2015-2017?view=msvc-170) may encounter null dereferences in mutex machinery. You must follow this rule: When you mix binaries built by different supported versions of the toolset, the Redistributable version must be at least as new as the latest toolset used by any app component. > > - You can define _DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR as an escape hatch.
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This reverts commit 782dcd5.
There were some minor merge conflicts (we added
^^^to the#endifcomment, and ASan changed theenv.lstfile) so this isn't a pure reversion.Fixes #4338