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Revert 220932.

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Commit 220932 caused crash when building clang-tblgen on aarch64 debian target,
so it's blocking all daily tests.

The std::call_once implementation in pthread has bug for aarch64 debian.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221331 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jiangning Liu
2014-11-05 04:44:31 +00:00
parent 84dc1b5c92
commit 07e1080b89
6 changed files with 4 additions and 85 deletions
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36
include/llvm/Support/Threading.h
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@@ -15,14 +15,6 @@
#ifndef LLVM_SUPPORT_THREADING_H
#define LLVM_SUPPORT_THREADING_H
#include "llvm/Config/llvm-config.h" // for LLVM_ON_UNIX
#if defined(LLVM_ON_UNIX)
#include <mutex>
#else
#include "llvm/Support/Atomic.h"
#endif
namespace llvm {
/// Returns true if LLVM is compiled with support for multi-threading, and
/// false otherwise.
@@ -41,34 +33,6 @@ namespace llvm {
/// the thread stack.
void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
unsigned RequestedStackSize = 0);
#if defined(LLVM_ON_UNIX)
typedef std::once_flag once_flag;
#define LLVM_DEFINE_ONCE_FLAG(flag) static once_flag flag
#else
enum InitStatus {
Done = -1,
Uninitialized = 0,
Wait = 1
};
typedef volatile sys::cas_flag once_flag;
#define LLVM_DEFINE_ONCE_FLAG(flag) static once_flag flag = Uninitialized
#endif
/// \brief Execute the function specified as a parameter once.
///
/// Typical usage:
/// \code
/// void foo() {...};
/// ...
/// LLVM_DEFINE_ONCE_FLAG(flag);
/// call_once(flag, foo);
/// \endcode
///
/// \param flag Flag used for tracking whether or not this has run.
/// \param UserFn Function to call once.
void call_once(once_flag &flag, void (*UserFn)(void));
}
#endif