From 516c31911578db8ce53529483c3ded918ac7dc6b Mon Sep 17 00:00:00 2001
From: Jason Sams <rjsams@android.com>
Date: Tue, 6 Oct 2009 13:58:47 -0700
Subject: Implement data push from scripts.  Fixes the problem where apps would
 have to poll to monitor a scripts state. Fix bug in StoreState where state
 could be overridden by the default unless the script used more than one
 state.

Change only impacts renderscript and renderscript apps.
---
 .../java/android/renderscript/RenderScript.java    | 55 ++++++++++++++++++++++
 graphics/jni/android_renderscript_RenderScript.cpp | 34 +++++++++++++
 2 files changed, 89 insertions(+)

(limited to 'graphics')

diff --git a/graphics/java/android/renderscript/RenderScript.java b/graphics/java/android/renderscript/RenderScript.java
index 6b0b696..1f2ea38 100644
--- a/graphics/java/android/renderscript/RenderScript.java
+++ b/graphics/java/android/renderscript/RenderScript.java
@@ -75,6 +75,9 @@ public class RenderScript {
     native void nContextAddDefineF(String name, float value);
     native void nContextPause();
     native void nContextResume();
+    native int nContextGetMessage(int[] data, boolean wait);
+    native void nContextInitToClient();
+    native void nContextDeinitToClient();
 
     native void nAssignName(int obj, byte[] name);
     native void nObjDestroy(int id);
@@ -190,6 +193,7 @@ public class RenderScript {
     private int     mContext;
     @SuppressWarnings({"FieldCanBeLocal"})
     private Surface mSurface;
+    private MessageThread mMessageThread;
 
 
     Element mElement_USER_U8;
@@ -214,6 +218,52 @@ public class RenderScript {
     ///////////////////////////////////////////////////////////////////////////////////
     //
 
+    public static class RSMessage implements Runnable {
+        protected int[] mData;
+        protected int mID;
+        public void run() {
+        }
+    }
+    public RSMessage mMessageCallback = null;
+
+    private static class MessageThread extends Thread {
+        RenderScript mRS;
+        boolean mRun = true;
+
+        MessageThread(RenderScript rs) {
+            super("RSMessageThread");
+            mRS = rs;
+
+        }
+
+        public void run() {
+            // This function is a temporary solution.  The final solution will
+            // used typed allocations where the message id is the type indicator.
+            int[] rbuf = new int[16];
+            mRS.nContextInitToClient();
+            while(mRun) {
+                int msg = mRS.nContextGetMessage(rbuf, true);
+                if (msg == 0) {
+                    // Should only happen during teardown.
+                    // But we want to avoid starving other threads during
+                    // teardown by yielding until the next line in the destructor
+                    // can execute to set mRun = false
+                    try {
+                        sleep(1, 0);
+                    } catch(InterruptedException e) {
+                    }
+                }
+                if(mRS.mMessageCallback != null) {
+                    mRS.mMessageCallback.mData = rbuf;
+                    mRS.mMessageCallback.mID = msg;
+                    mRS.mMessageCallback.run();
+                }
+                //Log.d("rs", "MessageThread msg " + msg + " v1 " + rbuf[0] + " v2 " + rbuf[1] + " v3 " +rbuf[2]);
+            }
+            Log.d("rs", "MessageThread exiting.");
+        }
+    }
+
     public RenderScript(Surface sur, boolean useDepth, boolean forceSW) {
         mSurface = sur;
         mDev = nDeviceCreate();
@@ -222,9 +272,14 @@ public class RenderScript {
         }
         mContext = nContextCreate(mDev, mSurface, 0, useDepth);
         Element.initPredefined(this);
+        mMessageThread = new MessageThread(this);
+        mMessageThread.start();
     }
 
     public void destroy() {
+        nContextDeinitToClient();
+        mMessageThread.mRun = false;
+
         nContextDestroy(mContext);
         mContext = 0;
 
diff --git a/graphics/jni/android_renderscript_RenderScript.cpp b/graphics/jni/android_renderscript_RenderScript.cpp
index 9054b65..fa3baa2 100644
--- a/graphics/jni/android_renderscript_RenderScript.cpp
+++ b/graphics/jni/android_renderscript_RenderScript.cpp
@@ -194,6 +194,37 @@ nContextResume(JNIEnv *_env, jobject _this)
     rsContextResume(con);
 }
 
+static jint
+nContextGetMessage(JNIEnv *_env, jobject _this, jintArray data, jboolean wait)
+{
+    RsContext con = (RsContext)(_env->GetIntField(_this, gContextId));
+    jint len = _env->GetArrayLength(data);
+    LOG_API("nContextGetMessage, con(%p), len(%i)", con, len);
+    jint *ptr = _env->GetIntArrayElements(data, NULL);
+    size_t receiveLen;
+    int id = rsContextGetMessage(con, ptr, &receiveLen, len * 4, wait);
+    if (!id && receiveLen) {
+        LOGE("message receive buffer too small.  %i", receiveLen);
+    }
+    _env->ReleaseIntArrayElements(data, ptr, 0);
+    return id;
+}
+
+static void nContextInitToClient(JNIEnv *_env, jobject _this)
+{
+    RsContext con = (RsContext)(_env->GetIntField(_this, gContextId));
+    LOG_API("nContextInitToClient, con(%p)", con);
+    rsContextInitToClient(con);
+}
+
+static void nContextDeinitToClient(JNIEnv *_env, jobject _this)
+{
+    RsContext con = (RsContext)(_env->GetIntField(_this, gContextId));
+    LOG_API("nContextDeinitToClient, con(%p)", con);
+    rsContextDeinitToClient(con);
+}
+
+
 static void
 nElementBegin(JNIEnv *_env, jobject _this)
 {
@@ -1303,6 +1334,9 @@ static JNINativeMethod methods[] = {
 {"nAssignName",                    "(I[B)V",                               (void*)nAssignName },
 {"nObjDestroy",                    "(I)V",                                 (void*)nObjDestroy },
 {"nObjDestroyOOB",                 "(I)V",                                 (void*)nObjDestroyOOB },
+{"nContextGetMessage",             "([IZ)I",                               (void*)nContextGetMessage },
+{"nContextInitToClient",           "()V",                                  (void*)nContextInitToClient },
+{"nContextDeinitToClient",         "()V",                                  (void*)nContextDeinitToClient },
 
 {"nFileOpen",                      "([B)I",                                (void*)nFileOpen },
 
-- 
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