| /* |
| * Copyright (C) 2011 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_TAG "SQLiteGlobal" |
| |
| #include <jni.h> |
| #include <JNIHelp.h> |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include <sqlite3.h> |
| #include <sqlite3_android.h> |
| |
| #include "android_database_SQLiteCommon.h" |
| #include "android_util_Log.h" |
| |
| namespace android { |
| |
| // Limit heap to 8MB for now. This is 4 times the maximum cursor window |
| // size, as has been used by the original code in SQLiteDatabase for |
| // a long time. |
| static const int SOFT_HEAP_LIMIT = 8 * 1024 * 1024; |
| |
| |
| // Called each time a message is logged. |
| static void sqliteLogCallback(void* data, int iErrCode, const char* zMsg) { |
| bool verboseLog = !!data; |
| if (iErrCode == 0 || iErrCode == SQLITE_CONSTRAINT || iErrCode == SQLITE_SCHEMA) { |
| if (verboseLog) { |
| ALOGV(LOG_VERBOSE, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg); |
| } |
| } else { |
| ALOG(LOG_ERROR, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg); |
| } |
| } |
| |
| // Sets the global SQLite configuration. |
| // This must be called before any other SQLite functions are called. |
| static void sqliteInitialize() { |
| // Enable multi-threaded mode. In this mode, SQLite is safe to use by multiple |
| // threads as long as no two threads use the same database connection at the same |
| // time (which we guarantee in the SQLite database wrappers). |
| sqlite3_config(SQLITE_CONFIG_MULTITHREAD); |
| |
| // Redirect SQLite log messages to the Android log. |
| bool verboseLog = android_util_Log_isVerboseLogEnabled(SQLITE_LOG_TAG); |
| sqlite3_config(SQLITE_CONFIG_LOG, &sqliteLogCallback, verboseLog ? (void*)1 : NULL); |
| |
| // The soft heap limit prevents the page cache allocations from growing |
| // beyond the given limit, no matter what the max page cache sizes are |
| // set to. The limit does not, as of 3.5.0, affect any other allocations. |
| sqlite3_soft_heap_limit(SOFT_HEAP_LIMIT); |
| |
| // Initialize SQLite. |
| sqlite3_initialize(); |
| } |
| |
| static jint nativeReleaseMemory(JNIEnv* env, jclass clazz) { |
| return sqlite3_release_memory(SOFT_HEAP_LIMIT); |
| } |
| |
| static JNINativeMethod sMethods[] = |
| { |
| /* name, signature, funcPtr */ |
| { "nativeReleaseMemory", "()I", |
| (void*)nativeReleaseMemory }, |
| }; |
| |
| int register_android_database_SQLiteGlobal(JNIEnv *env) |
| { |
| sqliteInitialize(); |
| |
| return AndroidRuntime::registerNativeMethods(env, "android/database/sqlite/SQLiteGlobal", |
| sMethods, NELEM(sMethods)); |
| } |
| |
| } // namespace android |