tree cf124534246719537c7d93b3e8aac74fc572ff49
parent fb5dd38a3516879d7319ba842f7e4cdfbee36b5b
author Martin Storsjo <martin@martin.st> 1508786976 +0000
committer Martin Storsjo <martin@martin.st> 1508786976 +0000

Abstract rwlocks into a class, provide a SRW lock implementation for windows

This requires _WIN32_WINNT >= 0x0600.

If someone wants to spend effort on supporting earlier versions,
one can easily add another fallback implementation based on
critical sections, or try to load SRW lock functions dynamically.

This makes sure that the FDE cache is thread safe on windows.

Differential Revision: https://reviews.llvm.org/D38704

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@316364 91177308-0d34-0410-b5e6-96231b3b80d8