72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
/*
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* Copyright 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 1
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#define LOG_TAG "GraphicsEnv"
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#include <graphicsenv/GraphicsEnv.h>
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#include <mutex>
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#include <log/log.h>
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#include <nativeloader/dlext_namespaces.h>
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// TODO(b/37049319) Get this from a header once one exists
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extern "C" {
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android_namespace_t* android_get_exported_namespace(const char*);
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}
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namespace android {
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/*static*/ GraphicsEnv& GraphicsEnv::getInstance() {
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static GraphicsEnv env;
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return env;
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}
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void GraphicsEnv::setDriverPath(const std::string path) {
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if (!mDriverPath.empty()) {
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ALOGV("ignoring attempt to change driver path from '%s' to '%s'",
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mDriverPath.c_str(), path.c_str());
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return;
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}
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ALOGV("setting driver path to '%s'", path.c_str());
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mDriverPath = path;
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}
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android_namespace_t* GraphicsEnv::getDriverNamespace() {
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static std::once_flag once;
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std::call_once(once, [this]() {
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if (mDriverPath.empty())
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return;
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// If the sphal namespace isn't configured for a device, don't support updatable drivers.
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// We need a parent namespace to inherit the default search path from.
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auto sphalNamespace = android_get_exported_namespace("sphal");
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if (!sphalNamespace) return;
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mDriverNamespace = android_create_namespace("gfx driver",
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nullptr, // ld_library_path
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mDriverPath.c_str(), // default_library_path
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ANDROID_NAMESPACE_TYPE_SHARED |
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ANDROID_NAMESPACE_TYPE_ISOLATED,
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nullptr, // permitted_when_isolated_path
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sphalNamespace);
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});
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return mDriverNamespace;
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}
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} // namespace android
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extern "C" android_namespace_t* android_getDriverNamespace() {
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return android::GraphicsEnv::getInstance().getDriverNamespace();
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}
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