Martin Kustermann
cfe45b6e3e
The newly added --worker-thread-priority can be used by users as an opt-in to set the thread priority / nice value. It is the responsibility of the user to ensure that the process has the right to change the priority to the given value. Failure to set the priority will be fatal. See b/154918152 Change-Id: I3b3791e88b6ddf4fa6e39e4587f7fe1ab4d2312f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150560 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
35 lines
1.1 KiB
Dart
35 lines
1.1 KiB
Dart
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// VMOptions=--worker-thread-priority=-2
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// A priority of -2 means THREAD_PRIORITY_LOWEST on windows
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import 'dart:ffi';
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import 'dart:io';
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import 'package:expect/expect.dart';
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final DynamicLibrary kernel32 = DynamicLibrary.open("kernel32.dll");
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// HANDLE GetCurrentThread();
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typedef GetCurrentThreadFT = int Function();
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typedef GetCurrentThreadNFT = IntPtr Function();
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// int GetThreadPriority(HANDLE hThread);
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typedef GetThreadPriorityFT = int Function(int handle);
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typedef GetThreadPriorityNFT = Int32 Function(IntPtr handle);
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final getCurrentThread =
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kernel32.lookupFunction<GetCurrentThreadNFT, GetCurrentThreadFT>(
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'GetCurrentThread');
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final getThreadPriority =
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kernel32.lookupFunction<GetThreadPriorityNFT, GetThreadPriorityFT>(
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'GetThreadPriority');
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main(args) {
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if (Platform.isWindows) {
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Expect.equals(-2, getThreadPriority(getCurrentThread()));
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}
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}
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