Merge "AssetManager: Cache a pre-filtered list of configurations" into nyc-dev (1df15228) · Commits · e / os / android_frameworks_base

include/androidfw/ResourceTypes.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -1896,6 +1896,13 @@ private:

		mutable Mutex mLock;

		// Mutex that controls access to the list of pre-filtered configurations
		// to check when looking up entries.
		// When iterating over a bag, the mLock mutex is locked. While mLock is locked,
		// we do resource lookups.
		// Mutex is not reentrant, so we must use a different lock than mLock.
		mutable Mutex mFilteredConfigLock;

		status_t mError;

		ResTable_config mParams;

libs/androidfw/ResourceTypes.cpp

+61 −7

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@
		#include <string.h>

		#include <limits>
		#include <memory>
		#include <type_traits>

		#include <androidfw/ByteBucketArray.h>
		@@ -3146,6 +3147,9 @@ struct ResTable::Entry {
		StringPoolRef keyStr;
		};

		template <typename T>
		using SharedVector = std::shared_ptr<Vector<T>>;

		struct ResTable::Type
		{
		Type(const Header* _header, const Package* _package, size_t count)
		@@ -3158,6 +3162,10 @@ struct ResTable::Type
		const uint32_t* typeSpecFlags;
		IdmapEntries idmapEntries;
		Vector<const ResTable_type*> configs;

		// The set of configurations that match the current parameters.
		// This will be swapped with a new set when the parameters change.
		SharedVector<const ResTable_type*> filteredConfigs;
		};

		struct ResTable::Package
		@@ -4430,18 +4438,44 @@ ssize_t ResTable::getBagLocked(uint32_t resID, const bag_entry** outBag,

		void ResTable::setParameters(const ResTable_config* params)
		{
		mLock.lock();
		AutoMutex _lock(mLock);
		AutoMutex _lock2(mFilteredConfigLock);

		if (kDebugTableGetEntry) {
		ALOGI("Setting parameters: %s\n", params->toString().string());
		}
		mParams = *params;
		for (size_t i=0; i<mPackageGroups.size(); i++) {
		for (size_t p = 0; p < mPackageGroups.size(); p++) {
		PackageGroup* packageGroup = mPackageGroups.editItemAt(p);
		if (kDebugTableNoisy) {
		ALOGI("CLEARING BAGS FOR GROUP %zu!", i);
		ALOGI("CLEARING BAGS FOR GROUP %zu!", p);
		}
		packageGroup->clearBagCache();

		for (size_t t = 0; t < packageGroup->types.size(); t++) {
		TypeList& typeList = packageGroup->types.editItemAt(t);
		for (size_t ts = 0; ts < typeList.size(); ts++) {
		Type* type = typeList.editItemAt(ts);

		SharedVector<const ResTable_type*> newFilteredConfigs =
		std::make_shared<Vector<const ResTable_type*>>();
		for (size_t ti = 0; ti < type->configs.size(); ti++) {
		ResTable_config config;
		config.copyFromDtoH(type->configs[ti]->config);

		if (config.match(mParams)) {
		newFilteredConfigs->add(type->configs[ti]);
		}
		}

		if (kDebugTableNoisy) {
		ALOGD("Updating pkg=%zu type=%zu with %zu filtered configs",
		p, t, newFilteredConfigs->size());
		}
		type->filteredConfigs = newFilteredConfigs;
		}
		}
		mPackageGroups[i]->clearBagCache();
		}
		mLock.unlock();
		}

		void ResTable::getParameters(ResTable_config* params) const
		@@ -5974,9 +6008,29 @@ status_t ResTable::getEntry(
		specFlags = -1;
		}

		const size_t numConfigs = typeSpec->configs.size();
		const Vector<const ResTable_type> candidateConfigs = &typeSpec->configs;

		SharedVector<const ResTable_type*> filteredConfigs;
		if (config && memcmp(&mParams, config, sizeof(mParams)) == 0) {
		// Grab the lock first so we can safely get the current filtered list.
		AutoMutex _lock(mFilteredConfigLock);

		// This configuration is equal to the one we have previously cached for,
		// so use the filtered configs.

		if (typeSpec->filteredConfigs) {
		// Grab a reference to the shared_ptr so it doesn't get destroyed while
		// going through this list.
		filteredConfigs = typeSpec->filteredConfigs;

		// Use this filtered list.
		candidateConfigs = filteredConfigs.get();
		}
		}

		const size_t numConfigs = candidateConfigs->size();
		for (size_t c = 0; c < numConfigs; c++) {
		const ResTable_type* const thisType = typeSpec->configs[c];
		const ResTable_type* const thisType = candidateConfigs->itemAt(c);
		if (thisType == NULL) {
		continue;
		}