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https://github.com/mozilla/gecko-dev.git
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53a80005eb
Depends on D188023 Differential Revision: https://phabricator.services.mozilla.com/D188024
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/* 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 http://mozilla.org/MPL/2.0/. */
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#include "Hal.h"
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#include "HalLog.h"
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#include "nsWindowsHelpers.h" // for nsAutoHandle and nsModuleHandle
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#include "mozilla/StaticPrefs_dom.h"
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#include <windows.h>
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using namespace mozilla::hal;
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namespace mozilla {
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namespace hal_impl {
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void SetProcessPriority(int aPid, ProcessPriority aPriority) {
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HAL_LOG("WindowsProcessPriority - SetProcessPriority(%d, %s)\n", aPid,
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ProcessPriorityToString(aPriority));
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nsAutoHandle processHandle(
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::OpenProcess(PROCESS_SET_INFORMATION, FALSE, aPid));
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if (processHandle) {
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DWORD priority = NORMAL_PRIORITY_CLASS;
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if (aPriority == PROCESS_PRIORITY_BACKGROUND) {
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priority = IDLE_PRIORITY_CLASS;
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} else if (aPriority == PROCESS_PRIORITY_BACKGROUND_PERCEIVABLE) {
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priority = BELOW_NORMAL_PRIORITY_CLASS;
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}
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if (::SetPriorityClass(processHandle, priority)) {
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HAL_LOG("WindowsProcessPriority - priority set to %d for pid %d\n",
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aPriority, aPid);
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}
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// Set the process into or out of EcoQoS.
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static bool alreadyInitialized = false;
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static decltype(::SetProcessInformation)* setProcessInformation = nullptr;
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if (!alreadyInitialized) {
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if (aPriority == PROCESS_PRIORITY_PARENT_PROCESS ||
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!StaticPrefs::dom_ipc_processPriorityManager_backgroundUsesEcoQoS()) {
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return;
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}
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alreadyInitialized = true;
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// SetProcessInformation only exists on Windows 8 and later.
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nsModuleHandle module(LoadLibrary(L"Kernel32.dll"));
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if (module) {
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setProcessInformation =
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(decltype(::SetProcessInformation)*)GetProcAddress(
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module, "SetProcessInformation");
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}
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}
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if (!setProcessInformation) {
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return;
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}
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PROCESS_POWER_THROTTLING_STATE PowerThrottling;
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RtlZeroMemory(&PowerThrottling, sizeof(PowerThrottling));
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PowerThrottling.Version = PROCESS_POWER_THROTTLING_CURRENT_VERSION;
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PowerThrottling.ControlMask = PROCESS_POWER_THROTTLING_EXECUTION_SPEED;
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PowerThrottling.StateMask =
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(aPriority == PROCESS_PRIORITY_BACKGROUND) &&
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StaticPrefs::
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dom_ipc_processPriorityManager_backgroundUsesEcoQoS()
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? PROCESS_POWER_THROTTLING_EXECUTION_SPEED
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: 0;
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if (setProcessInformation(processHandle, ProcessPowerThrottling,
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&PowerThrottling, sizeof(PowerThrottling))) {
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HAL_LOG("SetProcessInformation(%d, %s)\n", aPid,
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aPriority == PROCESS_PRIORITY_BACKGROUND ? "eco" : "normal");
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} else {
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HAL_LOG("SetProcessInformation failed for %d\n", aPid);
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}
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}
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}
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} // namespace hal_impl
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} // namespace mozilla
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