From 4e24aac6aeb6c7dad2a40aa6d455debf2d1738f6 Mon Sep 17 00:00:00 2001
From: Dianne Hackborn <hackbod@google.com>
Date: Thu, 23 Dec 2010 11:43:46 -0800
Subject: [PATCH] Add some standard definitions for device heaps.

These can be included as desired by particular devices to configure
their Dalvik heap in a standard way.

Change-Id: I487c751d7c583b0e93552f16ab43a93314219778
---
 api/current.xml                            | 11 +++++++++++
 build/phone-hdpi-512-dalvik-heap.mk        | 23 ++++++++++++++++++++++
 build/phone-hdpi-dalvik-heap.mk            | 22 +++++++++++++++++++++
 build/tablet-dalvik-heap.mk                | 22 +++++++++++++++++++++
 core/java/android/app/ActivityManager.java | 22 +++++++++++++++++++++
 5 files changed, 100 insertions(+)
 create mode 100644 build/phone-hdpi-512-dalvik-heap.mk
 create mode 100644 build/phone-hdpi-dalvik-heap.mk
 create mode 100644 build/tablet-dalvik-heap.mk

diff --git a/api/current.xml b/api/current.xml
index d7e626d1e3560..54cdbd7fef458 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -24307,6 +24307,17 @@
  visibility="public"
 >
 </method>
+<method name="getLargeMemoryClass"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
 <method name="getMemoryClass"
  return="int"
  abstract="false"
diff --git a/build/phone-hdpi-512-dalvik-heap.mk b/build/phone-hdpi-512-dalvik-heap.mk
new file mode 100644
index 0000000000000..afc45ee11486d
--- /dev/null
+++ b/build/phone-hdpi-512-dalvik-heap.mk
@@ -0,0 +1,23 @@
+#
+# Copyright (C) 2010 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Provides overrides to configure the Dalvik heap for a standard high density
+# phone with around 512MB total RAM.
+
+PRODUCT_PROPERTY_OVERRIDES += \
+    dalvik.vm.heapstartsize=5m \
+    dalvik.vm.smallheapsize=32m \
+    dalvik.vm.heapsize=32m
diff --git a/build/phone-hdpi-dalvik-heap.mk b/build/phone-hdpi-dalvik-heap.mk
new file mode 100644
index 0000000000000..ee30b92079cdf
--- /dev/null
+++ b/build/phone-hdpi-dalvik-heap.mk
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2010 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Provides overrides to configure the Dalvik heap for a standard high density phone.
+
+PRODUCT_PROPERTY_OVERRIDES += \
+    dalvik.vm.heapstartsize=5m \
+    dalvik.vm.smallheapsize=32m \
+    dalvik.vm.heapsize=32m
diff --git a/build/tablet-dalvik-heap.mk b/build/tablet-dalvik-heap.mk
new file mode 100644
index 0000000000000..9cb2f6bdebc18
--- /dev/null
+++ b/build/tablet-dalvik-heap.mk
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2010 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Provides overrides to configure the Dalvik heap for a standard tablet device.
+
+PRODUCT_PROPERTY_OVERRIDES += \
+    dalvik.vm.heapstartsize=5m \
+    dalvik.vm.smallheapsize=48m \
+    dalvik.vm.heapsize=48m
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index ebdc7fdcae080..096a6ebc8d1c1 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -62,6 +62,28 @@ public class ActivityManager {
     
     /** @hide */
     static public int staticGetMemoryClass() {
+        // Really brain dead right now -- just take this from the configured
+        // vm heap size, and assume it is in megabytes and thus ends with "m".
+        String vmHeapSize = SystemProperties.get("dalvik.vm.smallheapsize", "16m");
+        return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1));
+    }
+    
+    /**
+     * Return the approximate per-application memory class of the current
+     * device when an application is running with a large heap.  This is the
+     * space available for memory-intensive applications; most applications
+     * should not need this amount of memory, and should instead stay with the
+     * {@link #getMemoryClass()} limit.  The returned value is in megabytes.
+     * This may be the same size as {@link #getMemoryClass()} on memory
+     * constrained devices, or it may be significantly larger on devices with
+     * a large amount of available RAM.
+     */
+    public int getLargeMemoryClass() {
+        return staticGetLargeMemoryClass();
+    }
+    
+    /** @hide */
+    static public int staticGetLargeMemoryClass() {
         // Really brain dead right now -- just take this from the configured
         // vm heap size, and assume it is in megabytes and thus ends with "m".
         String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m");