limit mediaserver memory

Limit mediaserver using rlimit, to prevent it from bringing down the system
via the low memory killer.
Default max is 65% of total RAM, but can be customized via system property.

Bug: 28471206
Bug: 28615448
Change-Id: Ic84137435d1ef0a6883e9789a4b4f399e4283f05

1 files changed, 35 insertions, 0 deletions

diff --git a/media/libmedia/MediaUtils.h b/media/libmedia/MediaUtils.h
new file mode 100644
index 0000000..f80dd30
--- /dev/null
+++ b/media/libmedia/MediaUtils.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef _MEDIA_UTILS_H
+#define _MEDIA_UTILS_H
+
+namespace android {
+
+/**
+   Limit the amount of memory a process can allocate using setrlimit(RLIMIT_AS).
+   The value to use will be read from the specified system property, or if the
+   property doesn't exist it will use the specified number of bytes or the
+   specified percentage of total memory, whichever is smaller.
+*/
+void limitProcessMemory(
+    const char *property,
+    size_t numberOfBytes,
+    size_t percentageOfTotalMem);
+
+}   // namespace android
+
+#endif  // _MEDIA_UTILS_H