Support reference operations in RS scripts.

Change-Id: I9cb5f3cb71823ab24ca51bf0167a0f52cf0691f9
diff --git a/rsScriptC_Lib.cpp b/rsScriptC_Lib.cpp
index ac32810..5a2b6ba 100644
--- a/rsScriptC_Lib.cpp
+++ b/rsScriptC_Lib.cpp
@@ -239,7 +239,7 @@
     return a->getType()->getDimFaces();
 }
 
-const void * SC_getElementAtX(RsAllocation va, uint32_t x)
+static const void * SC_getElementAtX(RsAllocation va, uint32_t x)
 {
     const Allocation *a = static_cast<const Allocation *>(va);
     const Type *t = a->getType();
@@ -247,7 +247,7 @@
     return &p[t->getElementSizeBytes() * x];
 }
 
-const void * SC_getElementAtXY(RsAllocation va, uint32_t x, uint32_t y)
+static const void * SC_getElementAtXY(RsAllocation va, uint32_t x, uint32_t y)
 {
     const Allocation *a = static_cast<const Allocation *>(va);
     const Type *t = a->getType();
@@ -255,7 +255,7 @@
     return &p[t->getElementSizeBytes() * (x + y*t->getDimX())];
 }
 
-const void * SC_getElementAtXYZ(RsAllocation va, uint32_t x, uint32_t y, uint32_t z)
+static const void * SC_getElementAtXYZ(RsAllocation va, uint32_t x, uint32_t y, uint32_t z)
 {
     const Allocation *a = static_cast<const Allocation *>(va);
     const Type *t = a->getType();
@@ -263,6 +263,20 @@
     return &p[t->getElementSizeBytes() * (x + y*t->getDimX())];
 }
 
+static void SC_setObject(void **vdst, void * vsrc) {
+    static_cast<ObjectBase *>(vsrc)->incSysRef();
+    static_cast<ObjectBase *>(vdst[0])->decSysRef();
+    *vdst = vsrc;
+}
+static void SC_clearObject(void **vdst) {
+    static_cast<ObjectBase *>(vdst[0])->decSysRef();
+    *vdst = NULL;
+}
+static bool SC_isObject(RsAllocation vsrc) {
+    return vsrc != NULL;
+}
+
+
 
 static void SC_debugF(const char *s, float f) {
     LOGE("%s %f, 0x%08x", s, f, *((int *) (&f)));
@@ -405,6 +419,11 @@
     { "_Z14rsGetElementAt13rs_allocationjj", (void *)&SC_getElementAtXY },
     { "_Z14rsGetElementAt13rs_allocationjjj", (void *)&SC_getElementAtXYZ },
 
+    { "_Z11rsSetObjectP13rs_allocation13rs_allocation", (void *)&SC_setObject },
+    { "_Z13rsClearObjectP13rs_allocation", (void *)&SC_clearObject },
+    { "_Z10rsIsObject13rs_allocation", (void *)&SC_isObject },
+
+
     // Debug
     { "_Z7rsDebugPKcf", (void *)&SC_debugF },
     { "_Z7rsDebugPKcff", (void *)&SC_debugFv2 },