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Diffstat (limited to '')
-rw-r--r-- | hal/android/AndroidProcessPriority.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/hal/android/AndroidProcessPriority.cpp b/hal/android/AndroidProcessPriority.cpp new file mode 100644 index 0000000000..3bd145cef9 --- /dev/null +++ b/hal/android/AndroidProcessPriority.cpp @@ -0,0 +1,62 @@ +/* -*- 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 |