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//===-- llvm/Support/thread.h - Wrapper for <thread> ------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header is a wrapper for <thread> that works around problems with the
// MSVC headers when exceptions are disabled. It also provides llvm::thread,
// which is either a typedef of std::thread or a replacement that calls the
// function synchronously depending on the value of LLVM_ENABLE_THREADS.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_THREAD_H
#define LLVM_SUPPORT_THREAD_H
#include "llvm/Config/llvm-config.h"
#if LLVM_ENABLE_THREADS
#ifdef _MSC_VER
// concrt.h depends on eh.h for __uncaught_exception declaration
// even if we disable exceptions.
#include <eh.h>
// Suppress 'C++ exception handler used, but unwind semantics are not enabled.'
#pragma warning(push)
#pragma warning(disable:4530)
#endif
#include <thread>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
namespace llvm {
typedef std::thread thread;
}
#else // !LLVM_ENABLE_THREADS
#include <utility>
namespace llvm {
struct thread {
thread() {}
thread(thread &&other) {}
template <class Function, class... Args>
explicit thread(Function &&f, Args &&... args) {
f(std::forward<Args>(args)...);
}
thread(const thread &) = delete;
void join() {}
static unsigned hardware_concurrency() { return 1; };
};
}
#endif // LLVM_ENABLE_THREADS
#endif
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