/*
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* Copyright (C) 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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#include <android_runtime/AndroidRuntime.h>
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#include <log/log.h>
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#include <string>
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// Use reflection to query the default cache dir.
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// The function is NOT thread-safe. It is expected to be called
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// at most once per process.
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extern "C" const char* rsQueryCacheDir() {
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static std::string cacheDir;
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// First check if we have JavaVM running in this process.
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if (android::AndroidRuntime::getJavaVM()) {
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JNIEnv* env = android::AndroidRuntime::getJNIEnv();
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if (env) {
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jclass cacheDirClass = env->FindClass("android/renderscript/RenderScriptCacheDir");
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jfieldID cacheDirID = env->GetStaticFieldID(cacheDirClass, "mCacheDir", "Ljava/io/File;");
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jobject cache_dir = env->GetStaticObjectField(cacheDirClass, cacheDirID);
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if (cache_dir) {
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jclass fileClass = env->FindClass("java/io/File");
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jmethodID getPath = env->GetMethodID(fileClass, "getPath", "()Ljava/lang/String;");
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jstring path_string = (jstring)env->CallObjectMethod(cache_dir, getPath);
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const char *path_chars = env->GetStringUTFChars(path_string, NULL);
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ALOGD("Successfully queried cache dir: %s", path_chars);
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cacheDir = std::string(path_chars);
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env->ReleaseStringUTFChars(path_string, path_chars);
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} else {
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ALOGD("Cache dir not initialized");
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}
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} else {
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ALOGD("Failed to query the default cache dir.");
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}
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}
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return cacheDir.c_str();
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}
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