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