SF: Commit created layers without using transactions
This solves a couple of issues:
1. This will remove the need to maintain a transaction
queue and a pending transaction queue. If we remove
one of the queues, we have to maintain transactions
by apply tokens and layer creation transactions will
create an order dependency between apply tokens.
2. For transaction tracing, layer creations are
tracked at the layer creation binder call. Tracking
internal layer creation transactions as well will
create an invalid state since the transaction is
a side effect not a client request.
Test: presubmit
Bug: 200284593
Change-Id: Ibfdf403dd0129801fcfb4c64229616d48f84fe9b
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index e308c80..e765c9b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2136,7 +2136,8 @@
bool needsTraversal = false;
if (clearTransactionFlags(eTransactionFlushNeeded)) {
- needsTraversal = flushTransactionQueues(vsyncId);
+ needsTraversal |= commitCreatedLayers();
+ needsTraversal |= flushTransactionQueues(vsyncId);
}
const bool shouldCommit =
@@ -3602,7 +3603,7 @@
}
status_t SurfaceFlinger::addClientLayer(const sp<Client>& client, const sp<IBinder>& handle,
- const sp<Layer>& lbc, const wp<Layer>& parent,
+ const sp<Layer>& layer, const wp<Layer>& parent,
bool addToRoot, uint32_t* outTransformHint) {
if (mNumLayers >= ISurfaceComposer::MAX_LAYERS) {
ALOGE("AddClientLayer failed, mNumLayers (%zu) >= MAX_LAYERS (%zu)", mNumLayers.load(),
@@ -3610,31 +3611,22 @@
return NO_MEMORY;
}
- setLayerCreatedState(handle, lbc, parent, addToRoot);
+ {
+ std::scoped_lock<std::mutex> lock(mCreatedLayersLock);
+ mCreatedLayers.emplace_back(layer, parent, addToRoot);
+ }
- // Create a transaction includes the initial parent and producer.
- Vector<ComposerState> states;
- Vector<DisplayState> displays;
-
- ComposerState composerState;
- composerState.state.what = layer_state_t::eLayerCreated;
- composerState.state.surface = handle;
- states.add(composerState);
-
- lbc->updateTransformHint(mActiveDisplayTransformHint);
+ layer->updateTransformHint(mActiveDisplayTransformHint);
if (outTransformHint) {
*outTransformHint = mActiveDisplayTransformHint;
}
// attach this layer to the client
if (client != nullptr) {
- client->attachLayer(handle, lbc);
+ client->attachLayer(handle, layer);
}
- int64_t transactionId = (((int64_t)mPid) << 32) | mUniqueTransactionId++;
- return setTransactionState(FrameTimelineInfo{}, states, displays, 0 /* flags */, nullptr,
- InputWindowCommands{}, -1 /* desiredPresentTime */,
- true /* isAutoTimestamp */, {}, false /* hasListenerCallbacks */, {},
- transactionId);
+ setTransactionFlags(eTransactionNeeded);
+ return NO_ERROR;
}
uint32_t SurfaceFlinger::getTransactionFlags() const {
@@ -4219,15 +4211,7 @@
uint32_t flags = 0;
sp<Layer> layer = nullptr;
if (s.surface) {
- if (what & layer_state_t::eLayerCreated) {
- layer = handleLayerCreatedLocked(s.surface);
- if (layer) {
- flags |= eTransactionNeeded | eTraversalNeeded;
- mLayersAdded = true;
- }
- } else {
- layer = fromHandle(s.surface).promote();
- }
+ layer = fromHandle(s.surface).promote();
} else {
// The client may provide us a null handle. Treat it as if the layer was removed.
ALOGW("Attempt to set client state with a null layer handle");
@@ -4638,7 +4622,6 @@
return result;
}
- setTransactionFlags(eTransactionNeeded);
*outLayerId = layer->sequence;
return result;
}
@@ -7075,53 +7058,19 @@
}
}
-void SurfaceFlinger::setLayerCreatedState(const sp<IBinder>& handle, const wp<Layer>& layer,
- const wp<Layer> parent, bool addToRoot) {
- Mutex::Autolock lock(mCreatedLayersLock);
- mCreatedLayers[handle->localBinder()] =
- std::make_unique<LayerCreatedState>(layer, parent, addToRoot);
-}
-
-auto SurfaceFlinger::getLayerCreatedState(const sp<IBinder>& handle) {
- Mutex::Autolock lock(mCreatedLayersLock);
- BBinder* b = nullptr;
- if (handle) {
- b = handle->localBinder();
- }
-
- if (b == nullptr) {
- return std::unique_ptr<LayerCreatedState>(nullptr);
- }
-
- auto it = mCreatedLayers.find(b);
- if (it == mCreatedLayers.end()) {
- ALOGE("Can't find layer from handle %p", handle.get());
- return std::unique_ptr<LayerCreatedState>(nullptr);
- }
-
- auto state = std::move(it->second);
- mCreatedLayers.erase(it);
- return state;
-}
-
-sp<Layer> SurfaceFlinger::handleLayerCreatedLocked(const sp<IBinder>& handle) {
- const auto& state = getLayerCreatedState(handle);
- if (!state) {
- return nullptr;
- }
-
- sp<Layer> layer = state->layer.promote();
+void SurfaceFlinger::handleLayerCreatedLocked(const LayerCreatedState& state) {
+ sp<Layer> layer = state.layer.promote();
if (!layer) {
- ALOGE("Invalid layer %p", state->layer.unsafe_get());
- return nullptr;
+ ALOGD("Layer was destroyed soon after creation %p", state.layer.unsafe_get());
+ return;
}
sp<Layer> parent;
- bool addToRoot = state->addToRoot;
- if (state->initialParent != nullptr) {
- parent = state->initialParent.promote();
+ bool addToRoot = state.addToRoot;
+ if (state.initialParent != nullptr) {
+ parent = state.initialParent.promote();
if (parent == nullptr) {
- ALOGE("Invalid parent %p", state->initialParent.unsafe_get());
+ ALOGD("Parent was destroyed soon after creation %p", state.initialParent.unsafe_get());
addToRoot = false;
}
}
@@ -7141,7 +7090,6 @@
layer->updateTransformHint(mActiveDisplayTransformHint);
mInterceptor->saveSurfaceCreation(layer);
- return layer;
}
void SurfaceFlinger::sample() {
@@ -7223,6 +7171,26 @@
layerName);
return buffer;
}
+
+bool SurfaceFlinger::commitCreatedLayers() {
+ std::vector<LayerCreatedState> createdLayers;
+ {
+ std::scoped_lock<std::mutex> lock(mCreatedLayersLock);
+ createdLayers = std::move(mCreatedLayers);
+ mCreatedLayers.clear();
+ if (createdLayers.size() == 0) {
+ return false;
+ }
+ }
+
+ Mutex::Autolock _l(mStateLock);
+ for (const auto& createdLayer : createdLayers) {
+ handleLayerCreatedLocked(createdLayer);
+ }
+ createdLayers.clear();
+ mLayersAdded = true;
+ return true;
+}
} // namespace android
#if defined(__gl_h_)