commit c2cb7c641445a3501c92b883f5079293a3ed9706
author Nico Weber <nicolasweber@gmx.de> Wed Mar 20 22:55:03 2019 +0000
committer Nico Weber <nicolasweber@gmx.de> Wed Mar 20 22:55:03 2019 +0000
tree e2ad3a1c6faebf8aa7d1477e96026802acf2e90f
parent 080f06df5416fa8f6efdf413ff1239d33b5d5310

libc++/win: Make once_flag have the same size as a pointer.

`unsigned long` is 32-bit on 32-bit systems and 64-bit on 64-bit systems
on LP64 systems -- which most Unix systems are, but Windows isn't.
Windows is LLP64, which means unsigned long is 32-bit even on 64-bit
systems.

pplwin.h contains

    static_assert(alignof(void *) == alignof(::std::once_flag), ...)

which fails due to this problem.

Instead of unsigned long, use uintptr_t, which consistently is 32-bit
on 32-bit systems and 64-bit on 64-bit systems.

No functional change except on 64-bit Windows.

Differential Revision: https://reviews.llvm.org/D59607

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@356624 91177308-0d34-0410-b5e6-96231b3b80d8