Merge changes I5174a6ec,I1f8538b6,Idb71fdcf

* changes:
  fix a crasher in SurfaceTexture::updateTexImage()
  rework dequeueBuffer()'s main loop.
  error out when SurfaceTexture APIs are called while not connected

1 files changed, 22 insertions, 3 deletions

diff --git a/include/gui/SurfaceTexture.h b/include/gui/SurfaceTexture.h
index 3f9e68d..a6fb12e 100644
--- a/include/gui/SurfaceTexture.h
+++ b/include/gui/SurfaceTexture.h
@@ -208,9 +208,28 @@ public:
 
 protected:
 
-    // freeAllBuffers frees the resources (both GraphicBuffer and EGLImage) for
-    // all slots.
-    void freeAllBuffers();
+    // freeBufferLocked frees the resources (both GraphicBuffer and EGLImage)
+    // for the given slot.
+    void freeBufferLocked(int index);
+
+    // freeAllBuffersLocked frees the resources (both GraphicBuffer and
+    // EGLImage) for all slots.
+    void freeAllBuffersLocked();
+
+    // freeAllBuffersExceptHeadLocked frees the resources (both GraphicBuffer
+    // and EGLImage) for all slots except the head of mQueue
+    void freeAllBuffersExceptHeadLocked();
+
+    // drainQueueLocked drains the buffer queue if we're in synchronous mode
+    // returns immediately otherwise. return NO_INIT if SurfaceTexture
+    // became abandoned or disconnected during this call.
+    status_t drainQueueLocked();
+
+    // drainQueueAndFreeBuffersLocked drains the buffer queue if we're in
+    // synchronous mode and free all buffers. In asynchronous mode, all buffers
+    // are freed except the current buffer.
+    status_t drainQueueAndFreeBuffersLocked();
+
     static bool isExternalFormat(uint32_t format);
 
 private: