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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#include "Hal.h"
#include "mozilla/java/GeckoProcessManagerWrappers.h"
#include "mozilla/java/GeckoProcessTypeWrappers.h"
#include "mozilla/java/ServiceAllocatorWrappers.h"
/**
* Bucket the Gecko HAL process priority level into one of the three Android
* priority levels.
*/
static mozilla::java::ServiceAllocator::PriorityLevel::LocalRef
ToJavaPriorityLevel(const ProcessPriority aPriority) {
if (aPriority >= PROCESS_PRIORITY_FOREGROUND) {
return mozilla::java::ServiceAllocator::PriorityLevel::FOREGROUND();
} else if (aPriority <= PROCESS_PRIORITY_PREALLOC &&
aPriority >= PROCESS_PRIORITY_BACKGROUND_PERCEIVABLE) {
return mozilla::java::ServiceAllocator::PriorityLevel::BACKGROUND();
}
return mozilla::java::ServiceAllocator::PriorityLevel::IDLE();
}
namespace mozilla {
namespace hal_impl {
bool SetProcessPrioritySupported() { return true; }
void SetProcessPriority(int aPid, ProcessPriority aPriority) {
if (aPriority == PROCESS_PRIORITY_PARENT_PROCESS) {
// This is the parent process itself, which we do not control.
return;
}
const int32_t intPriority = static_cast<int32_t>(aPriority);
if (intPriority < 0 || intPriority >= NUM_PROCESS_PRIORITY) {
return;
}
auto contentProcType = java::GeckoProcessType::CONTENT();
auto selector =
java::GeckoProcessManager::Selector::New(contentProcType, aPid);
auto priorityLevel = ToJavaPriorityLevel(aPriority);
// To Android, a lower-valued integer is a higher relative priority.
// We take the integer value of the enum and subtract it from the value
// of the highest Gecko priority level to obtain a 0-based indicator of
// the relative priority within the Java PriorityLevel.
const int32_t relativeImportance =
(static_cast<int32_t>(NUM_PROCESS_PRIORITY) - 1) - intPriority;
java::GeckoProcessManager::SetProcessPriority(selector, priorityLevel,
relativeImportance);
}
} // namespace hal_impl
} // namespace mozilla
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