forked from mirrors/gecko-dev
b6782fe2d5
For desktop this should basically have no impact (maybe impacts tab warming, but if we wanted we could set the priority hint from the tab switcher the same way we set renderLayers), but Fenix always has renderLayers as true, effectively, so we were never de-prioritizing the background tab processes. Differential Revision: https://phabricator.services.mozilla.com/D145351
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#include "Hal.h"
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#include "mozilla/java/GeckoProcessManagerWrappers.h"
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#include "mozilla/java/GeckoProcessTypeWrappers.h"
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#include "mozilla/java/ServiceAllocatorWrappers.h"
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using namespace mozilla::hal;
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/**
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* Bucket the Gecko HAL process priority level into one of the three Android
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* priority levels.
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*/
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static mozilla::java::ServiceAllocator::PriorityLevel::LocalRef
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ToJavaPriorityLevel(const ProcessPriority aPriority) {
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if (aPriority >= PROCESS_PRIORITY_FOREGROUND) {
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return mozilla::java::ServiceAllocator::PriorityLevel::FOREGROUND();
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} else if (aPriority <= PROCESS_PRIORITY_PREALLOC &&
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aPriority >= PROCESS_PRIORITY_BACKGROUND_PERCEIVABLE) {
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return mozilla::java::ServiceAllocator::PriorityLevel::BACKGROUND();
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}
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return mozilla::java::ServiceAllocator::PriorityLevel::IDLE();
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}
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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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if (aPriority == PROCESS_PRIORITY_PARENT_PROCESS) {
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// This is the parent process itself, which we do not control.
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return;
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}
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const int32_t intPriority = static_cast<int32_t>(aPriority);
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if (intPriority < 0 || intPriority >= NUM_PROCESS_PRIORITY) {
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return;
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}
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auto contentProcType = java::GeckoProcessType::CONTENT();
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auto selector =
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java::GeckoProcessManager::Selector::New(contentProcType, aPid);
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auto priorityLevel = ToJavaPriorityLevel(aPriority);
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// To Android, a lower-valued integer is a higher relative priority.
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// We take the integer value of the enum and subtract it from the value
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// of the highest Gecko priority level to obtain a 0-based indicator of
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// the relative priority within the Java PriorityLevel.
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const int32_t relativeImportance =
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(static_cast<int32_t>(NUM_PROCESS_PRIORITY) - 1) - intPriority;
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java::GeckoProcessManager::SetProcessPriority(selector, priorityLevel,
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relativeImportance);
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}
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} // namespace hal_impl
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} // namespace mozilla
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