Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 170 insertions, 0 deletions

diff --git a/js/src/threading/windows/CpuCount.cpp b/js/src/threading/windows/CpuCount.cpp
new file mode 100644
index 0000000000..8ec83dd7e3
--- /dev/null
+++ b/js/src/threading/windows/CpuCount.cpp
@@ -0,0 +1,20 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "threading/CpuCount.h"
+
+#include "util/Windows.h"
+
+uint32_t js::GetCPUCount() {
+  static uint32_t ncpus = 0;
+
+  if (ncpus == 0) {
+    SYSTEM_INFO sysinfo;
+    GetSystemInfo(&sysinfo);
+    ncpus = uint32_t(sysinfo.dwNumberOfProcessors);
+  }
+
+  return ncpus;
+}
diff --git a/js/src/threading/windows/ThreadPlatformData.h b/js/src/threading/windows/ThreadPlatformData.h
new file mode 100644
index 0000000000..deaa578def
--- /dev/null
+++ b/js/src/threading/windows/ThreadPlatformData.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef threading_windows_PlatformData_h
+#define threading_windows_PlatformData_h
+
+#include <assert.h>
+#include <new.h>
+#include <process.h>
+
+#include "threading/Thread.h"
+
+#include "util/Windows.h"
+
+namespace js {
+
+class ThreadId::PlatformData {
+  friend class Thread;
+  friend class ThreadId;
+
+  HANDLE handle;
+  unsigned id;
+};
+
+}  // namespace js
+
+#endif  // threading_windows_PlatformData_h
diff --git a/js/src/threading/windows/WindowsThread.cpp b/js/src/threading/windows/WindowsThread.cpp
new file mode 100644
index 0000000000..ee5f9428aa
--- /dev/null
+++ b/js/src/threading/windows/WindowsThread.cpp
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "threading/Thread.h"
+#include "threading/windows/ThreadPlatformData.h"
+
+namespace js {
+
+inline ThreadId::PlatformData* ThreadId::platformData() {
+  static_assert(sizeof platformData_ >= sizeof(PlatformData),
+                "platformData_ is too small");
+  return reinterpret_cast<PlatformData*>(platformData_);
+}
+
+inline const ThreadId::PlatformData* ThreadId::platformData() const {
+  static_assert(sizeof platformData_ >= sizeof(PlatformData),
+                "platformData_ is too small");
+  return reinterpret_cast<const PlatformData*>(platformData_);
+}
+
+ThreadId::ThreadId() {
+  platformData()->handle = nullptr;
+  platformData()->id = 0;
+}
+
+ThreadId::operator bool() const { return platformData()->handle; }
+
+bool ThreadId::operator==(const ThreadId& aOther) const {
+  return platformData()->id == aOther.platformData()->id;
+}
+
+bool Thread::create(unsigned int(__stdcall* aMain)(void*), void* aArg) {
+  MOZ_RELEASE_ASSERT(!joinable());
+
+  if (oom::ShouldFailWithOOM()) {
+    return false;
+  }
+
+  // Use _beginthreadex and not CreateThread, because threads that are
+  // created with the latter leak a small amount of memory when they use
+  // certain msvcrt functions and then exit.
+  uintptr_t handle = _beginthreadex(nullptr, options_.stackSize(), aMain, aArg,
+                                    STACK_SIZE_PARAM_IS_A_RESERVATION,
+                                    &id_.platformData()->id);
+  if (!handle) {
+    // On either Windows or POSIX we can't be sure if id_ was initalisad. So
+    // reset it manually.
+    id_ = ThreadId();
+    return false;
+  }
+  id_.platformData()->handle = reinterpret_cast<HANDLE>(handle);
+  return true;
+}
+
+void Thread::join() {
+  MOZ_RELEASE_ASSERT(joinable());
+  DWORD r = WaitForSingleObject(id_.platformData()->handle, INFINITE);
+  MOZ_RELEASE_ASSERT(r == WAIT_OBJECT_0);
+  BOOL success = CloseHandle(id_.platformData()->handle);
+  MOZ_RELEASE_ASSERT(success);
+  id_ = ThreadId();
+}
+
+void Thread::detach() {
+  MOZ_RELEASE_ASSERT(joinable());
+  BOOL success = CloseHandle(id_.platformData()->handle);
+  MOZ_RELEASE_ASSERT(success);
+  id_ = ThreadId();
+}
+
+ThreadId ThreadId::ThisThreadId() {
+  ThreadId id;
+  id.platformData()->handle = GetCurrentThread();
+  id.platformData()->id = GetCurrentThreadId();
+  MOZ_RELEASE_ASSERT(id != ThreadId());
+  return id;
+}
+
+void ThisThread::SetName(const char* name) {
+  MOZ_RELEASE_ASSERT(name);
+
+#ifdef _MSC_VER
+  // Setting the thread name requires compiler support for structured
+  // exceptions, so this only works when compiled with MSVC.
+  static const DWORD THREAD_NAME_EXCEPTION = 0x406D1388;
+  static const DWORD THREAD_NAME_INFO_TYPE = 0x1000;
+
+#  pragma pack(push, 8)
+  struct THREADNAME_INFO {
+    DWORD dwType;
+    LPCSTR szName;
+    DWORD dwThreadID;
+    DWORD dwFlags;
+  };
+#  pragma pack(pop)
+
+  THREADNAME_INFO info;
+  info.dwType = THREAD_NAME_INFO_TYPE;
+  info.szName = name;
+  info.dwThreadID = GetCurrentThreadId();
+  info.dwFlags = 0;
+
+  __try {
+    RaiseException(THREAD_NAME_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR),
+                   (ULONG_PTR*)&info);
+  } __except (EXCEPTION_EXECUTE_HANDLER) {
+    // Do nothing.
+  }
+#endif  // _MSC_VER
+}
+
+void ThisThread::GetName(char* nameBuffer, size_t len) {
+  MOZ_RELEASE_ASSERT(len > 0);
+  *nameBuffer = '\0';
+}
+
+}  // namespace js