1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "cpp/rsDispatch.h"
18#include "rsFallbackAdaptation.h"
19
20#include <log/log.h>
21#include <dlfcn.h>
22
23#undef LOG_TAG
24#define LOG_TAG "RenderScript Graphics Fallback"
25
26dispatchTable RsFallbackAdaptation::mEntryFuncs;
27
28RsFallbackAdaptation::RsFallbackAdaptation()
29{
30    void* handle = dlopen("libRS_internal.so", RTLD_LAZY | RTLD_LOCAL);
31    if (handle == NULL) {
32        ALOGE("couldn't dlopen %s.", dlerror());
33        return;
34    }
35    if (loadSymbols(handle, mEntryFuncs) == false) {
36        // If dispatch table initialization failed, the dispatch table
37        // will be reset, and calling function pointers of uninitialized
38        // dispatch table will crash the application.
39        ALOGE("Fallback dispatch table init failed!");
40        mEntryFuncs = {};
41        dlclose(handle);
42    }
43}
44
45RsFallbackAdaptation& RsFallbackAdaptation::GetInstance()
46{
47    // This function-local-static guarantees the instance is a singleton. The
48    // constructor of RsHidlAdaptation will only be called when GetInstance is
49    // called for the first time.
50    static RsFallbackAdaptation instance;
51    return instance;
52}
53
54const dispatchTable* RsFallbackAdaptation::GetEntryFuncs()
55{
56    return &mEntryFuncs;
57}
58
59