base/android/sys_utils.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/android/sys_utils.h"
   6
   7 #include "base/android/build_info.h"
   8 #include "base/sys_info.h"
   9 #include "jni/SysUtils_jni.h"
  10
  11 // Any device that reports a physical RAM size less than this, in megabytes
  12 // is considered 'low-end'. IMPORTANT: Read the LinkerLowMemoryThresholdTest
  13 // comments in build/android/pylib/linker/test_case.py before modifying this
  14 // value.
  15 #define ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB 512
  16
  17 const int64 kLowEndMemoryThreshold =
  18     1024 * 1024 * ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB;
  19
  20 // Only support low end device changes on builds greater than JB MR2.
  21 const int kLowEndSdkIntThreshold = 18;
  22
  23 // Defined and called by JNI
  24 static jboolean IsLowEndDevice(JNIEnv* env, jclass clazz) {
  25   return base::android::SysUtils::IsLowEndDevice();
  26 }
  27
  28 namespace base {
  29 namespace android {
  30
  31 bool SysUtils::Register(JNIEnv* env) {
  32   return RegisterNativesImpl(env);
  33 }
  34
  35 bool SysUtils::IsLowEndDevice() {
  36   return SysInfo::AmountOfPhysicalMemory() <= kLowEndMemoryThreshold &&
  37       BuildInfo::GetInstance()->sdk_int() > kLowEndSdkIntThreshold;
  38 }
  39
  40 SysUtils::SysUtils() { }
  41
  42 }  // namespace android
  43 }  // namespace base