ServiceManager signals init to start lazy services
This allows services to be disabled at boot and dynamically enabled as
they are needed. When servicemanager receives a getService request,
it will check whether the service is running. If it is not,
servicemanager will attempt to start the service by signaling init with
the ctl.interface_start control message.
Bug: 138756857
Test: Manual (using mediaextractor as a test service), test_sm
Change-Id: Ic2d47d21769b936381e3fae2f2cf739d3b7501a4
diff --git a/cmds/servicemanager/ServiceManager.h b/cmds/servicemanager/ServiceManager.h
index fcc5124..006e519 100644
--- a/cmds/servicemanager/ServiceManager.h
+++ b/cmds/servicemanager/ServiceManager.h
@@ -30,6 +30,7 @@
ServiceManager(std::unique_ptr<Access>&& access);
~ServiceManager();
+ // getService will try to start any services it cannot find
binder::Status getService(const std::string& name, sp<IBinder>* outBinder) override;
binder::Status checkService(const std::string& name, sp<IBinder>* outBinder) override;
binder::Status addService(const std::string& name, const sp<IBinder>& binder,
@@ -42,6 +43,9 @@
void binderDied(const wp<IBinder>& who) override;
+protected:
+ virtual void tryStartService(const std::string& name);
+
private:
struct Service {
sp<IBinder> binder; // not null
@@ -57,6 +61,7 @@
void removeCallback(const wp<IBinder>& who,
CallbackMap::iterator* it,
bool* found);
+ sp<IBinder> tryGetService(const std::string& name, bool startIfNotFound);
CallbackMap mNameToCallback;
ServiceMap mNameToService;