This tells whether or not the builtin function __builtin_memcmp is constexpr.
Only defined for clang 4.0 and later, and not true for any shipping version of Apple's clang.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291773 91177308-0d34-0410-b5e6-96231b3b80d8
Attempting to pair an `_aligned_malloc` with a regular free causes heap
corruption. Pairing with `_aligned_free` is required instead.
Makes the following libc++ tests pass on Windows:
```
std/language.support/support.dynamic/new.delete/new.delete.array/new_align_val_t.pass.cpp
std/language.support/support.dynamic/new.delete/new.delete.array/new_align_val_t_nothrow.pass.cpp
std/language.support/support.dynamic/new.delete/new.delete.single/new_align_val_t.pass.cpp
std/language.support/support.dynamic/new.delete/new.delete.single/new_align_val_t_nothrow.pass.cpp
```
Differential Revision: https://reviews.llvm.org/D28512
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291743 91177308-0d34-0410-b5e6-96231b3b80d8
There is no guaranteed order in which CMake files for individual
runtimes are invoked and therefore we cannot rely on existence of
targets defined in other runtimes. Use the new HAVE_<name> options
instead in those cases.
Differential Revision: https://reviews.llvm.org/D28391
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291632 91177308-0d34-0410-b5e6-96231b3b80d8
Although the CriticalSection itself doesnt need to be destroyed, there
may be debug data associated with it. Plug a possible small leak.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291536 91177308-0d34-0410-b5e6-96231b3b80d8
Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291508 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Some parts of the FreeBSD tree are still compiled with C++98, and until
rL288554 this has always worked fine. After that, a complaint about the
newly introduced local _PairT is produced:
/usr/include/c++/v1/memory:3354:27: error: template argument uses local type '_PairT' [-Werror,-Wlocal-type-template-args]
typedef __scalar_hash<_PairT> _HashT;
^~~~~~
/usr/include/c++/v1/memory:3284:29: error: template argument uses local type '_PairT' [-Werror,-Wlocal-type-template-args]
: public unary_function<_Tp, size_t>
^~~
/usr/include/c++/v1/memory:3356:12: note: in instantiation of template class 'std::__1::__scalar_hash<_PairT, 2>' requested here
return _HashT()(__p);
^
As far as I can see, there should be no problem moving the _PairT
struct to just before the __hash_combine() function, which fixes this
particular warning.
Reviewers: mclow.lists, EricWF
Subscribers: cfe-commits, emaste
Differential Revision: https://reviews.llvm.org/D28472
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291476 91177308-0d34-0410-b5e6-96231b3b80d8
Use CLOCK_UPTIME_RAW in case clock_gettime is available on Darwin.
On Apple platforms only CLOCK_UPTIME_RAW or mach_absolute_time are able
to time functions in the nanosecond range. Thus, they are the only
acceptable implementations of steady_clock.
Differential Revision: https://reviews.llvm.org/D27429
rdar://problem/29449467
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291466 91177308-0d34-0410-b5e6-96231b3b80d8
Need to allow unresolved symbols in the dylib. This was previously done for
LIBCXX_HAS_EXTERNAL_THREAD_API, but we have since split that into two with
LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY being the externally-threaded variant.
Also a minor CMakeLists.txt cleanup.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291433 91177308-0d34-0410-b5e6-96231b3b80d8
Windows is greedy and it defines the identifier `__out` as a macro.
This patch renames all conflicting libc++ identifiers in order
to correctly work on Windows.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291345 91177308-0d34-0410-b5e6-96231b3b80d8
ELAST should point to the last valid error string value. However,
`_sys_nerr` provides the number of elements in the errlist array. Since
the index is 0-based, this is off-by-one. Adjust it accordingly.
Thanks to David Majnemer for catching this!
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291336 91177308-0d34-0410-b5e6-96231b3b80d8
Add an implementation for the Win32 threading model as a backing API for
the internal c++ threading interfaces. This uses the Fls* family for
the TLS (which has the support for adding termination callbacks),
CRITICAL_SECTIONs for the recursive mutex, and Slim Reader/Writer locks
(SRW locks) for non-recursive mutexes. These APIs should all be
available on Vista or newer.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291333 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
On Windows the identifier `__deallocate` is defined as a macro by one of the Windows system headers. Previously libc++ worked around this by `#undef __deallocate` and generating a warning. However this causes the WIN32 version of `__threading_support` to always generate a warning on Windows. This is not OK.
This patch renames all usages of `__deallocate` internally as to not conflict with the macro.
Reviewers: mclow.lists, majnemer, rnk, rsmith, smeenai, compnerd
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D28426
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291332 91177308-0d34-0410-b5e6-96231b3b80d8
Windows does not provide an implementation of `nanosleep`. Round up the
time duration to the nearest ms and use `Sleep`. Although this may
over-sleep, there is no hard real-time guarantee on the wake, so
sleeping a bit more is better than under-sleeping as it within the
specification.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291331 91177308-0d34-0410-b5e6-96231b3b80d8
This patch adds a libc++ configuration macro for the ABI we
are targeting, either Itanium or Microsoft. For now we configure
for the Microsoft ABI when on Windows with a compiler that defines
_MSC_VER. However this is only temporary until Clang implements
builtin macros we can use.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291329 91177308-0d34-0410-b5e6-96231b3b80d8
On Windows the runtime search path for DLL's is the same as PATH.
This patch changes the test suite to add the libc++ build directory
to the runtime PATH.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291309 91177308-0d34-0410-b5e6-96231b3b80d8
This patch refactors the compiler detection done in `__config` by creating a
set of `_LIBCPP_COMPILER_<TYPE>` macros. The goal of this patch is to make
it easier to detect what compiler is being used outside of `__config`.
Additionally this patch removes workarounds for GCC in `__bit_reference`. I
tested GCC 4.8 and 4.9 without the workaround and neither seemed to need it
anymore.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291286 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This patch attempts to clean up the macro configuration mess in `<__threading_support>`, specifically the mess involving external threading variants. Additionally this patch adds design documentation for `<__threading_support>` and the configuration macros it uses.
The primary change in this patch is separating the idea of an "external API" provided by `<__external_threading>` and the idea of having an external threading library. Now `_LIBCPP_HAS_THREAD_API_EXTERNAL` means that libc++ should use `<__external_threading>` and that the header is expected to exist. Additionally the new macro `_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL` is now used to configure for using an "external library" with the default threading API.
Reviewers: compnerd, rmaprath
Subscribers: smeenai, cfe-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28316
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291275 91177308-0d34-0410-b5e6-96231b3b80d8
This is motivated by adding a third RTTI scheme to libc++. Split out
the two forms of the itanium RTTI representation. This is based on
suggestions from Eric Fiselier. NFC
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291174 91177308-0d34-0410-b5e6-96231b3b80d8
Split out the recursive and non-recursive mutex. This split is needed
for platforms which may use differing types for the two mutex (e.g.
Win32 threads).
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291145 91177308-0d34-0410-b5e6-96231b3b80d8
