Propagate background scheduling class across processes.
This is a very simply implementation: upon receiving an IPC, if the handling
thread is at a background priority (the driver will have taken care of
propagating this from the calling thread), then stick it in to the background
scheduling group. Plus an API to turn this off for the process, which is
used by the system process.
This also pulls some of the code for managing scheduling classes out of
the Process JNI wrappers and in to some convenience methods in thread.h.
diff --git a/include/binder/IPCThreadState.h b/include/binder/IPCThreadState.h
index 78306b2..3ab985d 100644
--- a/include/binder/IPCThreadState.h
+++ b/include/binder/IPCThreadState.h
@@ -68,6 +68,13 @@
static void shutdown();
+ // Call this to disable switching threads to background scheduling when
+ // receiving incoming IPC calls. This is specifically here for the
+ // Android system process, since it expects to have background apps calling
+ // in to it but doesn't want to acquire locks in its services while in
+ // the background.
+ static void disableBackgroundScheduling(bool disable);
+
private:
IPCThreadState();
~IPCThreadState();
@@ -93,9 +100,10 @@
void* cookie);
const sp<ProcessState> mProcess;
+ const pid_t mMyThreadId;
Vector<BBinder*> mPendingStrongDerefs;
Vector<RefBase::weakref_type*> mPendingWeakDerefs;
-
+
Parcel mIn;
Parcel mOut;
status_t mLastError;