1 files changed, 62 insertions, 2 deletions
diff --git a/libs/hwui/renderthread/RenderTask.h b/libs/hwui/renderthread/RenderTask.h
index 865b1e6fced1..9fe7573f71b7 100644
--- a/libs/hwui/renderthread/RenderTask.h
+++ b/libs/hwui/renderthread/RenderTask.h
@@ -18,19 +18,79 @@
 #define RENDERTASK_H_
 
 #include <cutils/compiler.h>
+#include <utils/Timers.h>
 
 namespace android {
+class Mutex;
+class Condition;
 namespace uirenderer {
 namespace renderthread {
 
+#define METHOD_INVOKE_PAYLOAD_SIZE (8 * sizeof(void*))
+
+/*
+ * Notes about memory management
+ *
+ * RenderThread will only invoke RenderTask::run(). It is the responsibility
+ * of the RenderTask to know if it needs to suicide at the end of run() or
+ * if some other lifecycle is being used. As such, it is not valid to reference
+ * anything on RenderTask after the first call to run().
+ *
+ * For example SignalingRenderTask
+ * is expected to be stack allocated by the calling thread, so it does not
+ * suicide in run() but instead relies on the caller to destroy it.
+ *
+ * MethodInvokeRenderTask however is currently allocated with new, so it will
+ * suicide at the end of run(). TODO: Replace this with a small pool to avoid
+ * malloc/free churn of small objects?
+ */
+
 class ANDROID_API RenderTask {
 public:
-    ANDROID_API RenderTask();
-    ANDROID_API virtual ~RenderTask();
+    ANDROID_API RenderTask() : mNext(0), mRunAt(0) {}
+    ANDROID_API virtual ~RenderTask() {}
 
     ANDROID_API virtual void run() = 0;
 
     RenderTask* mNext;
+    nsecs_t mRunAt;
+};
+
+class SignalingRenderTask : public RenderTask {
+public:
+    // Takes ownership of task, caller owns lock and signal
+    SignalingRenderTask(RenderTask* task, Mutex* lock, Condition* signal)
+            : mTask(task), mLock(lock), mSignal(signal) {}
+    virtual void run();
+
+private:
+    RenderTask* mTask;
+    Mutex* mLock;
+    Condition* mSignal;
+};
+
+typedef void* (*RunnableMethod)(void* data);
+
+class MethodInvokeRenderTask : public RenderTask {
+public:
+    MethodInvokeRenderTask(RunnableMethod method)
+        : mMethod(method), mReturnPtr(0) {}
+
+    void* payload() { return mData; }
+    void setReturnPtr(void** retptr) { mReturnPtr = retptr; }
+
+    virtual void run() {
+        void* retval = mMethod(mData);
+        if (mReturnPtr) {
+            *mReturnPtr = retval;
+        }
+        // Commit suicide
+        delete this;
+    }
+private:
+    RunnableMethod mMethod;
+    char mData[METHOD_INVOKE_PAYLOAD_SIZE];
+    void** mReturnPtr;
 };
 
 } /* namespace renderthread */