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Diffstat (limited to 'contrib/llvm/lib/Support/Windows/Threading.inc')
-rw-r--r-- | contrib/llvm/lib/Support/Windows/Threading.inc | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/contrib/llvm/lib/Support/Windows/Threading.inc b/contrib/llvm/lib/Support/Windows/Threading.inc deleted file mode 100644 index 96649472cc90..000000000000 --- a/contrib/llvm/lib/Support/Windows/Threading.inc +++ /dev/null @@ -1,124 +0,0 @@ -//===- Windows/Threading.inc - Win32 Threading Implementation - -*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// This file provides the Win32 specific implementation of Threading functions. -// -//===----------------------------------------------------------------------===// - -#include "llvm/ADT/SmallString.h" -#include "llvm/ADT/Twine.h" - -#include "WindowsSupport.h" -#include <process.h> - -// Windows will at times define MemoryFence. -#ifdef MemoryFence -#undef MemoryFence -#endif - -namespace { - struct ThreadInfo { - void(*func)(void*); - void *param; - }; -} - -static unsigned __stdcall ThreadCallback(void *param) { - struct ThreadInfo *info = reinterpret_cast<struct ThreadInfo *>(param); - info->func(info->param); - - return 0; -} - -void llvm::llvm_execute_on_thread(void(*Fn)(void*), void *UserData, - unsigned RequestedStackSize) { - struct ThreadInfo param = { Fn, UserData }; - - HANDLE hThread = (HANDLE)::_beginthreadex(NULL, - RequestedStackSize, ThreadCallback, - ¶m, 0, NULL); - - if (hThread) { - // We actually don't care whether the wait succeeds or fails, in - // the same way we don't care whether the pthread_join call succeeds - // or fails. There's not much we could do if this were to fail. But - // on success, this call will wait until the thread finishes executing - // before returning. - (void)::WaitForSingleObject(hThread, INFINITE); - ::CloseHandle(hThread); - } -} - -uint64_t llvm::get_threadid() { - return uint64_t(::GetCurrentThreadId()); -} - -uint32_t llvm::get_max_thread_name_length() { return 0; } - -#if defined(_MSC_VER) -static void SetThreadName(DWORD Id, LPCSTR Name) { - constexpr DWORD MS_VC_EXCEPTION = 0x406D1388; - -#pragma pack(push, 8) - struct THREADNAME_INFO { - DWORD dwType; // Must be 0x1000. - LPCSTR szName; // Pointer to thread name - DWORD dwThreadId; // Thread ID (-1 == current thread) - DWORD dwFlags; // Reserved. Do not use. - }; -#pragma pack(pop) - - THREADNAME_INFO info; - info.dwType = 0x1000; - info.szName = Name; - info.dwThreadId = Id; - info.dwFlags = 0; - - __try { - ::RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), - (ULONG_PTR *)&info); - } - __except (EXCEPTION_EXECUTE_HANDLER) { - } -} -#endif - -void llvm::set_thread_name(const Twine &Name) { -#if defined(_MSC_VER) - // Make sure the input is null terminated. - SmallString<64> Storage; - StringRef NameStr = Name.toNullTerminatedStringRef(Storage); - SetThreadName(::GetCurrentThreadId(), NameStr.data()); -#endif -} - -void llvm::get_thread_name(SmallVectorImpl<char> &Name) { - // "Name" is not an inherent property of a thread on Windows. In fact, when - // you "set" the name, you are only firing a one-time message to a debugger - // which it interprets as a program setting its threads' name. We may be - // able to get fancy by creating a TLS entry when someone calls - // set_thread_name so that subsequent calls to get_thread_name return this - // value. - Name.clear(); -} - -SetThreadPriorityResult llvm::set_thread_priority(ThreadPriority Priority) { - // https://docs.microsoft.com/en-us/windows/desktop/api/processthreadsapi/nf-processthreadsapi-setthreadpriority - // Begin background processing mode. The system lowers the resource scheduling - // priorities of the thread so that it can perform background work without - // significantly affecting activity in the foreground. - // End background processing mode. The system restores the resource scheduling - // priorities of the thread as they were before the thread entered background - // processing mode. - return SetThreadPriority(GetCurrentThread(), - Priority == ThreadPriority::Background - ? THREAD_MODE_BACKGROUND_BEGIN - : THREAD_MODE_BACKGROUND_END) - ? SetThreadPriorityResult::SUCCESS - : SetThreadPriorityResult::FAILURE; -} |