Plumbing for RS priority.

Change-Id: Ibddfd40407fd6d24ac829a76a9a1e2047c48c5fd

libs/rs/driver/rsdCore.cpp

@@ -270,6 +270,9 @@ void SetPriority(const Context *rsc, int32_t priority) {
     for (uint32_t ct=0; ct < dc->mWorkers.mCount; ct++) {
         setpriority(PRIO_PROCESS, dc->mWorkers.mNativeThreadId[ct], priority);
     }
+    if (dc->mHasGraphics) {
+        rsdGLSetPriority(rsc, priority);
+    }
 }
 
 void Shutdown(Context *rsc) {

libs/rs/driver/rsdCore.h

@@ -46,6 +46,7 @@ typedef struct ScriptTLSStructRec {
 typedef struct RsdHalRec {
     uint32_t version_major;
     uint32_t version_minor;
+    bool mHasGraphics;
 
     struct Workers {
         volatile int mRunningCount;

libs/rs/driver/rsdGL.cpp

@@ -359,6 +359,7 @@ bool rsdGLInit(const Context *rsc) {
     dc->gl.vertexArrayState = new RsdVertexArrayState();
     dc->gl.vertexArrayState->init(dc->gl.gl.maxVertexAttribs);
     dc->gl.currentFrameBuffer = NULL;
+    dc->mHasGraphics = true;
 
     ALOGV("%p initGLThread end", rsc);
     rsc->setWatchdogGL(NULL, 0, NULL);
@@ -419,6 +420,15 @@ void rsdGLSwap(const android::renderscript::Context *rsc) {
     RSD_CALL_GL(eglSwapBuffers, dc->gl.egl.display, dc->gl.egl.surface);
 }
 
+void rsdGLSetPriority(const Context *rsc, int32_t priority) {
+    if (priority > 0) {
+        // Mark context as low priority.
+        ALOGV("low pri");
+    } else {
+        ALOGV("normal pri");
+    }
+}
+
 void rsdGLCheckError(const android::renderscript::Context *rsc,
                      const char *msg, bool isFatal) {
     GLenum err = glGetError();

libs/rs/driver/rsdGL.h

@@ -82,6 +82,8 @@ bool rsdGLSetSurface(const android::renderscript::Context *rsc,
 void rsdGLSwap(const android::renderscript::Context *rsc);
 void rsdGLCheckError(const android::renderscript::Context *rsc,
                      const char *msg, bool isFatal = false);
+void rsdGLSetPriority(const android::renderscript::Context *rsc,
+                      int32_t priority);
 
 #endif
 

libs/rs/rsContext.cpp

@@ -347,6 +347,7 @@ void Context::setPriority(int32_t p) {
 #else
     setpriority(PRIO_PROCESS, mNativeThreadId, p);
 #endif
+    mHal.funcs.setPriority(this, mThreadPriority);
 }
 
 Context::Context() {