Miao Wang | e2a912b | 2017-07-18 22:46:32 -0700 | [diff] [blame] | 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 <android_runtime/AndroidRuntime.h> |
| 18 | #include <log/log.h> |
| 19 | |
| 20 | #include <string> |
| 21 | |
| 22 | // Use reflection to query the default cache dir. |
| 23 | // The function is NOT thread-safe. It is expected to be called |
| 24 | // at most once per process. |
| 25 | extern "C" const char* rsQueryCacheDir() { |
| 26 | static std::string cacheDir; |
| 27 | // First check if we have JavaVM running in this process. |
| 28 | if (android::AndroidRuntime::getJavaVM()) { |
| 29 | JNIEnv* env = android::AndroidRuntime::getJNIEnv(); |
| 30 | if (env) { |
| 31 | jclass cacheDirClass = env->FindClass("android/renderscript/RenderScriptCacheDir"); |
| 32 | jfieldID cacheDirID = env->GetStaticFieldID(cacheDirClass, "mCacheDir", "Ljava/io/File;"); |
| 33 | jobject cache_dir = env->GetStaticObjectField(cacheDirClass, cacheDirID); |
| 34 | |
| 35 | if (cache_dir) { |
| 36 | jclass fileClass = env->FindClass("java/io/File"); |
| 37 | jmethodID getPath = env->GetMethodID(fileClass, "getPath", "()Ljava/lang/String;"); |
| 38 | jstring path_string = (jstring)env->CallObjectMethod(cache_dir, getPath); |
| 39 | const char *path_chars = env->GetStringUTFChars(path_string, NULL); |
| 40 | |
| 41 | ALOGD("Successfully queried cache dir: %s", path_chars); |
| 42 | cacheDir = std::string(path_chars); |
| 43 | env->ReleaseStringUTFChars(path_string, path_chars); |
| 44 | } else { |
| 45 | ALOGD("Cache dir not initialized"); |
| 46 | } |
| 47 | } else { |
| 48 | ALOGD("Failed to query the default cache dir."); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | return cacheDir.c_str(); |
| 53 | } |
| 54 | |