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63 lines
2.3 KiB
C++
63 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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/**
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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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bool SetProcessPrioritySupported() { return true; }
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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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