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/*
* 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 <gui/GraphicsEnv.h>
#include <mutex>
#include <log/log.h>
#include <nativeloader/dlext_namespaces.h>
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]() {
// TODO; In the next version of Android, all graphics drivers will be
// loaded into a custom namespace. To minimize risk for this release,
// only updated drivers use a custom namespace.
//
// Additionally, the custom namespace will be
// ANDROID_NAMESPACE_TYPE_ISOLATED, and will only have access to a
// subset of the system.
if (mDriverPath.empty())
return;
char defaultPath[PATH_MAX];
android_get_LD_LIBRARY_PATH(defaultPath, sizeof(defaultPath));
size_t defaultPathLen = strlen(defaultPath);
std::string path;
path.reserve(mDriverPath.size() + 1 + defaultPathLen);
path.append(mDriverPath);
path.push_back(':');
path.append(defaultPath, defaultPathLen);
mDriverNamespace = android_create_namespace(
"gfx driver",
nullptr, // ld_library_path
path.c_str(), // default_library_path
ANDROID_NAMESPACE_TYPE_SHARED,
nullptr, // permitted_when_isolated_path
nullptr); // parent
});
return mDriverNamespace;
}
} // namespace android
extern "C" android_namespace_t* android_getDriverNamespace() {
return android::GraphicsEnv::getInstance().getDriverNamespace();
}
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