win: Implement and use ScopedProcessSuspend

util/win/scoped_process_suspend.h

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_UTIL_WIN_SCOPED_PROCESS_SUSPEND_H_
+#define CRASHPAD_UTIL_WIN_SCOPED_PROCESS_SUSPEND_H_
+
+#include <windows.h>
+
+#include "base/basictypes.h"
+
+namespace crashpad {
+
+//! \brief Manages the suspension of another process.
+//!
+//! While an object of this class exists, the other process will be suspended.
+//! Once the object is destroyed, the other process will become eligible for
+//! resumption.
+//!
+//! If this process crashes while this object exists, there is no guarantee that
+//! the other process will be resumed.
+class ScopedProcessSuspend {
+ public:
+  //! Does not take ownership of \a process.
+  explicit ScopedProcessSuspend(HANDLE process);
+  ~ScopedProcessSuspend();
+
+ private:
+  HANDLE process_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedProcessSuspend);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_WIN_SCOPED_PROCESS_SUSPEND_H_