| /* |
| * Copyright 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. |
| */ |
| |
| //#define LOG_NDEBUG 1 |
| #define LOG_TAG "GraphicsEnv" |
| #include <graphicsenv/GraphicsEnv.h> |
| |
| #include <mutex> |
| |
| #include <log/log.h> |
| #include <nativeloader/dlext_namespaces.h> |
| |
| // TODO(b/37049319) Get this from a header once one exists |
| extern "C" { |
| android_namespace_t* android_get_exported_namespace(const char*); |
| } |
| |
| namespace android { |
| |
| /*static*/ GraphicsEnv& GraphicsEnv::getInstance() { |
| static GraphicsEnv env; |
| return env; |
| } |
| |
| void GraphicsEnv::setDriverPath(const std::string path) { |
| if (!mDriverPath.empty()) { |
| ALOGV("ignoring attempt to change driver path from '%s' to '%s'", |
| mDriverPath.c_str(), path.c_str()); |
| return; |
| } |
| ALOGV("setting driver path to '%s'", path.c_str()); |
| mDriverPath = path; |
| } |
| |
| android_namespace_t* GraphicsEnv::getDriverNamespace() { |
| static std::once_flag once; |
| std::call_once(once, [this]() { |
| if (mDriverPath.empty()) |
| return; |
| // If the sphal namespace isn't configured for a device, don't support updatable drivers. |
| // We need a parent namespace to inherit the default search path from. |
| auto sphalNamespace = android_get_exported_namespace("sphal"); |
| if (!sphalNamespace) return; |
| mDriverNamespace = android_create_namespace("gfx driver", |
| nullptr, // ld_library_path |
| mDriverPath.c_str(), // default_library_path |
| ANDROID_NAMESPACE_TYPE_SHARED | |
| ANDROID_NAMESPACE_TYPE_ISOLATED, |
| nullptr, // permitted_when_isolated_path |
| sphalNamespace); |
| }); |
| return mDriverNamespace; |
| } |
| |
| } // namespace android |
| |
| extern "C" android_namespace_t* android_getDriverNamespace() { |
| return android::GraphicsEnv::getInstance().getDriverNamespace(); |
| } |