34 lines
973 B
Go
34 lines
973 B
Go
// Copyright (C) 2018 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package osutil
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import (
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"fmt"
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"golang.org/x/sys/windows"
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)
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// SetLowPriority lowers the process CPU scheduling priority, and possibly
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// I/O priority depending on the platform and OS.
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func SetLowPriority() error {
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handle, err := windows.GetCurrentProcess()
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if err != nil {
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return fmt.Errorf("get process handle: %w", err)
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}
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defer windows.CloseHandle(handle)
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if cur, err := windows.GetPriorityClass(handle); err == nil && (cur == windows.IDLE_PRIORITY_CLASS || cur == windows.BELOW_NORMAL_PRIORITY_CLASS) {
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// We're done here.
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return nil
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}
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if err := windows.SetPriorityClass(handle, windows.BELOW_NORMAL_PRIORITY_CLASS); err != nil {
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return fmt.Errorf("set priority class: %w", err)
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}
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return nil
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}
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