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[libc++] Implement terminate(), unexpected() and uncaught_exceptions() on Windows 

Summary:
This patch implements the following functions on Windows by forwarding to the MSVCRT:

* `get_terminate()`
* `set_terminate()`
* `terminate()`
* `set_unexpected()`
* `get_unexpected()`
* `unexpected()`
* `uncaught_exception()`

* `uncaught_exceptions()`

Reviewers: compnerd, rnk, majnemer, smeenai

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D28442

llvm-svn: 291343
This commit is contained in:
Eric Fiselier 2017-01-07 10:04:40 +00:00
parent 72771139f1
commit 956604fed5
1 changed files with 28 additions and 6 deletions
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34
libcxx/src/exception.cpp
View File

@ -12,7 +12,10 @@
#include "exception"
#include "new"
#if defined(__APPLE__) && !defined(LIBCXXRT) && \
#if defined(_LIBCPP_ABI_MICROSOFT)
#include <eh.h>
#include <corecrt_terminate.h>
#elif defined(__APPLE__) && !defined(LIBCXXRT) && \
!defined(_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY)
#include <cxxabi.h>
@ -46,13 +49,21 @@ namespace std
unexpected_handler
set_unexpected(unexpected_handler func) _NOEXCEPT
{
return __sync_lock_test_and_set(&__unexpected_handler, func);
#if defined(_LIBCPP_ABI_MICROSOFT)
return ::set_unexpected(func);
#else
return __sync_lock_test_and_set(&__unexpected_handler, func);
#endif
}
unexpected_handler
get_unexpected() _NOEXCEPT
{
return __sync_fetch_and_add(&__unexpected_handler, (unexpected_handler)0);
#if defined(_LIBCPP_ABI_MICROSOFT)
return ::_get_unexpected();
#else
return __sync_fetch_and_add(&__unexpected_handler, (unexpected_handler)0);
#endif
}
_LIBCPP_NORETURN
@ -67,13 +78,21 @@ unexpected()
terminate_handler
set_terminate(terminate_handler func) _NOEXCEPT
{
return __sync_lock_test_and_set(&__terminate_handler, func);
#if defined(_LIBCPP_ABI_MICROSOFT)
return ::set_terminate(func);
#else
return __sync_lock_test_and_set(&__terminate_handler, func);
#endif
}
terminate_handler
get_terminate() _NOEXCEPT
{
return __sync_fetch_and_add(&__terminate_handler, (terminate_handler)0);
#if defined(_LIBCPP_ABI_MICROSOFT)
return ::_get_terminate();
#else
return __sync_fetch_and_add(&__terminate_handler, (terminate_handler)0);
#endif
}
#ifndef __EMSCRIPTEN__ // We provide this in JS
@ -103,6 +122,7 @@ terminate() _NOEXCEPT
#endif // !defined(LIBCXXRT) && !defined(_LIBCPPABI_VERSION)
#if !defined(LIBCXXRT) && !defined(__GLIBCXX__) && !defined(__EMSCRIPTEN__)
bool uncaught_exception() _NOEXCEPT { return uncaught_exceptions() > 0; }
int uncaught_exceptions() _NOEXCEPT
@ -115,7 +135,9 @@ int uncaught_exceptions() _NOEXCEPT
# else
return __cxa_uncaught_exception() ? 1 : 0;
# endif
#else // __APPLE__
#elif defined(_LIBCPP_ABI_MICROSOFT)
return __uncaught_exceptions();
#else
# if defined(_MSC_VER) && ! defined(__clang__)
_LIBCPP_WARNING("uncaught_exceptions not yet implemented")
# else