surfaceflinger: fix layer count
When a layer is removed, mLayerCount is always decremented by 1 even
though the layer has children. This commit fixes that by making
sure mLayerCount is properly decremented, and makes sure that a
parent layer must be a valid layer in mCurrentState.
Bug: 37121786
Test: manually open and close Camera app
Change-Id: I5a3e18be41646b167b4d361dfe08db4d06e1c2d0
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index c9ebf99..6955d73 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -518,6 +518,7 @@
const LayerVector::Visitor& visitor);
void traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor);
+ size_t getChildrenCount() const;
void addChild(const sp<Layer>& layer);
// Returns index if removed, or negative value otherwise
// for symmetry with Vector::remove