SQLite for android

2014-07-15 18:57:48 -05:00
parent 369c64d3d3
commit e918226918
65 changed files with 165611 additions and 4 deletions
--- a/packages/swig/android/jni/sqlite/android_database_SQLiteDebug.cpp
+++ b/packages/swig/android/jni/sqlite/android_database_SQLiteDebug.cpp
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+/*
+** Modified to support SQLite extensions by the SQLite developers: 
+** sqlite-dev@sqlite.org.
+*/
+
+#define LOG_TAG "SQLiteDebug"
+
+#include <jni.h>
+#include <JNIHelp.h>
+#include <ALog-priv.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sqlite3.h>
+
+namespace android {
+
+static struct {
+    jfieldID memoryUsed;
+    jfieldID pageCacheOverflow;
+    jfieldID largestMemAlloc;
+} gSQLiteDebugPagerStatsClassInfo;
+
+static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
+{
+    int memoryUsed;
+    int pageCacheOverflow;
+    int largestMemAlloc;
+    int unused;
+
+    sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
+    sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
+    sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
+    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
+    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
+            pageCacheOverflow);
+    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
+}
+
+/*
+ * JNI registration.
+ */
+
+static JNINativeMethod gMethods[] =
+{
+    { "nativeGetPagerStats", "(Lorg/sqlite/database/sqlite/SQLiteDebug$PagerStats;)V",
+            (void*) nativeGetPagerStats },
+};
+
+#define FIND_CLASS(var, className) \
+        var = env->FindClass(className); \
+        LOG_FATAL_IF(! var, "Unable to find class " className);
+
+#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
+        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
+        LOG_FATAL_IF(! var, "Unable to find field " fieldName);
+
+int register_android_database_SQLiteDebug(JNIEnv *env)
+{
+    jclass clazz;
+    FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteDebug$PagerStats");
+
+    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.memoryUsed, clazz,
+            "memoryUsed", "I");
+    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, clazz,
+            "largestMemAlloc", "I");
+    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow, clazz,
+            "pageCacheOverflow", "I");
+
+    return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteDebug",
+            gMethods, NELEM(gMethods));
+}
+
+} // namespace android