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Revert r219638, (r219640 and r219676), "Removing the static destructor from ManagedStatic.cpp by controlling the allocation and de-allocation of the mutex."

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It caused hang-up on msc17 builder, probably deadlock.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219687 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi
2014-10-14 15:58:16 +00:00
parent ad5d223cb5
commit 65e4aa4656
2 changed files with 6 additions and 48 deletions
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31
include/llvm/Support/Threading.h
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@@ -15,10 +15,6 @@
#ifndef LLVM_SUPPORT_THREADING_H
#define LLVM_SUPPORT_THREADING_H
#if !defined(__MINGW__)
#include <mutex>
#endif
namespace llvm {
/// Returns true if LLVM is compiled with support for multi-threading, and
/// false otherwise.
@@ -37,33 +33,6 @@ namespace llvm {
/// the thread stack.
void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
unsigned RequestedStackSize = 0);
/// \brief Execute the function specified as a template parameter once.
///
/// Calls \p UserFn once ever. The call uniqueness is based on the address of
/// the function passed in via the template arguement. This means no matter how
/// many times you call llvm_call_once<foo>() in the same or different
/// locations, foo will only be called once.
///
/// Typical usage:
/// \code
/// void foo() {...};
/// ...
/// llvm_call_once<foo>();
/// \endcode
///
/// \tparam UserFn Function to call once.
template <void (*UserFn)(void)> void llvm_call_once() {
#if !defined(__MINGW__)
static std::once_flag flag;
std::call_once(flag, UserFn);
#else
struct InitOnceWrapper {
InitOnceWrapper() { UserFn(); }
};
static InitOnceWrapper InitOnceVar;
#endif
}
}
#endif