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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_PROCESS_PROCESS_PRIORITY_DELEGATE_H_
#define BASE_PROCESS_PROCESS_PRIORITY_DELEGATE_H_
#include "base/base_export.h"
#include "base/process/process.h"
namespace base {
// A ProcessPriorityDelegate can intercept process priority changes. This can be
// used to adjust process properties via another process (e.g. resourced on
// ChromeOS).
// Methods are thread-safe.
class BASE_EXPORT ProcessPriorityDelegate {
public:
ProcessPriorityDelegate() = default;
ProcessPriorityDelegate(const ProcessPriorityDelegate&) = delete;
ProcessPriorityDelegate& operator=(const ProcessPriorityDelegate&) = delete;
virtual ~ProcessPriorityDelegate() = default;
// Returns true if changing the priority of processes through
// `base::Process::SetPriority()` is possible.
virtual bool CanSetProcessPriority() = 0;
// Initialize internal state for the process priority.
virtual void InitializeProcessPriority(ProcessId process_id) = 0;
// Clears internal state for the process priority.
virtual void ForgetProcessPriority(ProcessId process_id) = 0;
// Set process priotiry on behalf of base::Process::SetPriority().
virtual bool SetProcessPriority(ProcessId process_id,
Process::Priority priority) = 0;
// Returns the process priority on behalf of base::Process::GetPriority().
virtual Process::Priority GetProcessPriority(ProcessId process_id) = 0;
};
} // namespace base
#endif // BASE_PROCESS_PROCESS_PRIORITY_DELEGATE_H_
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