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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hidladapter/HidlBinderAdapter.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android/hidl/base/1.0/IBase.h>
#include <android/hidl/manager/1.0/IServiceManager.h>
#include <hidl/HidlTransportSupport.h>
#include <unistd.h>
#include <iostream>
#include <map>
#include <string>
namespace android {
namespace hardware {
namespace details {
using android::base::SetProperty;
using android::base::WaitForProperty;
const static std::string kDeactivateProp = "test.hidl.adapters.deactivated";
int usage(const std::string& me) {
std::cerr << "usage: " << me
<< " [-p|P] [-n instance-name] interface-name instance-name number-of-threads."
<< std::endl;
std::cerr << " -p: stop based on property " << kDeactivateProp << "and reset it."
<< std::endl;
std::cerr << " -P: stop based on interface specific property " << kDeactivateProp
<< ".<fq-name>.<instance-name>" << std::endl;
std::cerr
<< " -n instance-name: register as a different instance name (does not de-register)"
<< std::endl;
return EINVAL;
}
enum class StopMethod {
NONE,
ALL,
SPECIFIC,
};
struct Args {
StopMethod stopMethod = StopMethod::NONE;
std::string interface; // e.x. IFoo
std::string instanceName; // e.x. default
int threadNumber;
std::string registerInstanceName; // e.x. default
};
bool processArguments(int argc, char** argv, Args* args) {
int c;
while ((c = getopt(argc, argv, "pPn:")) != -1) {
switch (c) {
case 'p': {
args->stopMethod = StopMethod::ALL;
break;
}
case 'P': {
args->stopMethod = StopMethod::SPECIFIC;
break;
}
case 'n': {
args->registerInstanceName = optarg;
break;
}
default: { return false; }
}
}
argc -= optind;
argv += optind;
if (argc != 3) {
std::cerr << "ERROR: requires exactly three positional arguments for "
"interface, instance name, and number of threads, but "
<< argc << " provided." << std::endl;
return false;
}
args->interface = argv[0];
args->instanceName = argv[1];
args->threadNumber = std::stoi(argv[2]);
if (args->threadNumber <= 0) {
std::cerr << "ERROR: invalid thread number " << args->threadNumber
<< " must be a positive integer." << std::endl;
return false;
}
if (args->registerInstanceName.empty()) {
args->registerInstanceName = args->instanceName;
}
return true;
}
// only applies for -p argument
void waitForAdaptersDeactivated(const std::string& property) {
using std::literals::chrono_literals::operator""s;
while (!WaitForProperty(property, "true", 30s)) {
// Log this so that when using this option on testing devices, there is
// a clear indication if adapters are not properly stopped
LOG(WARNING) << "Adapter use in progress. Waiting for stop based on 'true' " << property;
}
SetProperty(property, "false");
}
int adapterMain(const std::string& package, int argc, char** argv,
const AdaptersFactory& adapters) {
using android::hardware::configureRpcThreadpool;
using android::hidl::base::V1_0::IBase;
using android::hidl::manager::V1_0::IServiceManager;
const std::string& me = argc > 0 ? argv[0] : "(error)";
Args args;
if (!processArguments(argc, argv, &args)) {
return usage(me);
}
std::string interfaceName = package + "::" + args.interface;
auto it = adapters.find(interfaceName);
if (it == adapters.end()) {
std::cerr << "ERROR: could not resolve " << interfaceName << "." << std::endl;
return 1;
}
std::cout << "Trying to adapt down " << interfaceName << "/" << args.instanceName << " to "
<< args.registerInstanceName << std::endl;
configureRpcThreadpool(args.threadNumber, false /* callerWillJoin */);
sp<IServiceManager> manager = IServiceManager::getService();
if (manager == nullptr) {
std::cerr << "ERROR: could not retrieve service manager." << std::endl;
return 1;
}
sp<IBase> implementation = manager->get(interfaceName, args.instanceName).withDefault(nullptr);
if (implementation == nullptr) {
std::cerr << "ERROR: could not retrieve desired implementation" << std::endl;
return 1;
}
sp<IBase> adapter = it->second(implementation);
if (adapter == nullptr) {
std::cerr << "ERROR: could not create adapter." << std::endl;
return 1;
}
bool replaced = manager->add(args.registerInstanceName, adapter).withDefault(false);
if (!replaced) {
std::cerr << "ERROR: could not register the service with the service manager." << std::endl;
return 1;
}
switch (args.stopMethod) {
case StopMethod::NONE: {
std::cout << "Press any key to disassociate adapter." << std::endl;
getchar();
break;
};
case StopMethod::SPECIFIC: {
const std::string property =
kDeactivateProp + "." + interfaceName + "." + args.registerInstanceName;
std::cout << "Set " << property << " to true to deactivate." << std::endl;
waitForAdaptersDeactivated(property);
break;
};
case StopMethod::ALL: {
std::cout << "Set " << kDeactivateProp << " to true to deactivate." << std::endl;
waitForAdaptersDeactivated(kDeactivateProp);
break;
};
}
// automatically unregistered on process exit if it is a new instance name
if (args.registerInstanceName == args.instanceName) {
bool restored = manager->add(args.instanceName, implementation).withDefault(false);
if (!restored) {
std::cerr << "ERROR: could not re-register interface with the service manager."
<< std::endl;
return 1;
}
}
std::cout << "Success." << std::endl;
return 0;
}
// If an interface is adapted to 1.0, it can then not be adapted to 1.1 in the same process.
// This poses a problem in the following scenario:
// auto interface = new V1_1::implementation::IFoo;
// hidlObject1_0->foo(interface) // adaptation set at 1.0
// hidlObject1_1->bar(interface) // adaptation still is 1.0
// This could be solved by keeping a map of IBase,fqName -> IBase, but then you end up
// with multiple names for the same interface.
sp<IBase> adaptWithDefault(const sp<IBase>& something,
const std::function<sp<IBase>()>& makeDefault) {
static std::map<sp<IBase>, sp<IBase>> sAdapterMap;
if (something == nullptr) {
return something;
}
auto it = sAdapterMap.find(something);
if (it == sAdapterMap.end()) {
it = sAdapterMap.insert(it, {something, makeDefault()});
}
return it->second;
}
} // namespace details
} // namespace hardware
} // namespace android
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