blob: 3cb64857506e77a9a6bbec078e8d86d0456a6772 [file] [log] [blame]
/*
* Copyright (C) 2016 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.
*/
#define LOG_TAG "libhidlmemory"
#include <map>
#include <mutex>
#include <string>
#include <hidlmemory/mapping.h>
#include <android-base/logging.h>
#include <android/hidl/memory/1.0/IMapper.h>
#include <hidl/HidlSupport.h>
using android::sp;
using android::hidl::memory::V1_0::IMemory;
using android::hidl::memory::V1_0::IMapper;
namespace android {
namespace hardware {
static std::map<std::string, sp<IMapper>> gMappersByName;
static std::mutex gMutex;
static inline sp<IMapper> getMapperService(const std::string& name) {
std::unique_lock<std::mutex> _lock(gMutex);
auto iter = gMappersByName.find(name);
if (iter != gMappersByName.end()) {
return iter->second;
}
sp<IMapper> mapper = IMapper::getService(name, true /* getStub */);
if (mapper != nullptr) {
gMappersByName[name] = mapper;
}
return mapper;
}
sp<IMemory> mapMemory(const hidl_memory& memory) {
sp<IMapper> mapper = getMapperService(memory.name());
if (mapper == nullptr) {
LOG(ERROR) << "Could not fetch mapper for " << memory.name() << " shared memory";
return nullptr;
}
if (mapper->isRemote()) {
LOG(ERROR) << "IMapper must be a passthrough service.";
return nullptr;
}
Return<sp<IMemory>> ret = mapper->mapMemory(memory);
if (!ret.isOk()) {
LOG(ERROR) << "hidl_memory map returned transport error.";
return nullptr;
}
return ret;
}
} // namespace hardware
} // namespace android