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359 lines
14 KiB
C
359 lines
14 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 1998, 1999, 2000
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* Sleepycat Software. All rights reserved.
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*
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* $Id: java_util.h,v 11.22 2001/01/11 18:19:53 bostic Exp $
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*/
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#ifndef _JAVA_UTIL_H_
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#define _JAVA_UTIL_H_
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#ifdef _MSC_VER
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/* These are level 4 warnings that are explicitly disabled.
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* With Visual C++, by default you do not see above level 3 unless
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* you use /W4. But we like to compile with the highest level
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* warnings to catch other errors.
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*
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* 4201: nameless struct/union
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* triggered by standard include file <winnt.h>
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*
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* 4244: '=' : convert from '__int64' to 'unsigned int', possible loss of data
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* results from making size_t data members correspond to jlongs
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*
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* 4514: unreferenced inline function has been removed
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* jni.h defines methods that are not called
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*
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* 4127: conditional expression is constant
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* occurs because of arg in JAVADB_RW_ACCESS_STRING macro
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*/
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#pragma warning(disable: 4244 4201 4514 4127)
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#endif
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#include "db_config.h"
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#include "db.h"
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#include "java_info.h"
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#include "java_locked.h"
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#include <jni.h>
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#include <string.h> /* needed for memset */
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#define DB_PACKAGE_NAME "com/sleepycat/db/"
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/* Union to convert longs to pointers (see {get,set}_private_dbobj).
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*/
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typedef union {
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jlong java_long;
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void *ptr;
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} long_to_ptr;
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/****************************************************************
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*
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* Utility functions and definitions used by "glue" functions.
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*
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*/
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#define NOT_IMPLEMENTED(str) \
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report_exception(jnienv, str /*concatenate*/ ": not implemented", 0)
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/* Get, delete a global reference.
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* Making this operation a function call allows for
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* easier tracking for debugging. Global references
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* are mostly grabbed at 'open' and 'close' points,
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* so there shouldn't be a big performance hit.
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*
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* Macro-izing this makes it easier to add debugging code
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* to track unreleased references.
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*/
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#ifdef DBJAVA_DEBUG
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#include <unistd.h>
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static void wrdebug(const char *str)
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{
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write(2, str, strlen(str));
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write(2, "\n", 1);
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}
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static jobject debug_new_global_ref(JNIEnv *jnienv, jobject obj, const char *s)
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{
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wrdebug(s);
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return (*jnienv)->NewGlobalRef(jnienv, obj);
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}
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static void debug_delete_global_ref(JNIEnv *jnienv, jobject obj, const char *s)
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{
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wrdebug(s);
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(*jnienv)->DeleteGlobalRef(jnienv, obj);
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}
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#define NEW_GLOBAL_REF(jnienv, obj) \
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debug_new_global_ref(jnienv, obj, "+Ref: " #obj)
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#define DELETE_GLOBAL_REF(jnienv, obj) \
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debug_delete_global_ref(jnienv, obj, "-Ref: " #obj)
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#else
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#define NEW_GLOBAL_REF(jnienv, obj) (*jnienv)->NewGlobalRef(jnienv, obj)
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#define DELETE_GLOBAL_REF(jnienv, obj) (*jnienv)->DeleteGlobalRef(jnienv, obj)
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#define wrdebug(x)
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#endif
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/* Get the private data from a Db* object that points back to a C DB_* object.
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* The private data is stored in the object as a Java long (64 bits),
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* which is long enough to store a pointer on current architectures.
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*/
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void *get_private_dbobj(JNIEnv *jnienv, const char *classname,
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jobject obj);
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/* Set the private data in a Db* object that points back to a C DB_* object.
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* The private data is stored in the object as a Java long (64 bits),
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* which is long enough to store a pointer on current architectures.
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*/
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void set_private_dbobj(JNIEnv *jnienv, const char *classname,
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jobject obj, void *value);
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/* Get the private data in a Db/DbEnv object that holds additional 'side data'.
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* The private data is stored in the object as a Java long (64 bits),
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* which is long enough to store a pointer on current architectures.
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*/
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void *get_private_info(JNIEnv *jnienv, const char *classname,
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jobject obj);
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/* Set the private data in a Db/DbEnv object that holds additional 'side data'.
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* The private data is stored in the object as a Java long (64 bits),
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* which is long enough to store a pointer on current architectures.
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*/
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void set_private_info(JNIEnv *jnienv, const char *classname,
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jobject obj, void *value);
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/*
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* Given a non-qualified name (e.g. "foo"), get the class handl
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* for the fully qualified name (e.g. "com.sleepycat.db.foo")
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*/
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jclass get_class(JNIEnv *jnienv, const char *classname);
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/* Set an individual field in a Db* object.
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* The field must be a DB object type.
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*/
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void set_object_field(JNIEnv *jnienv, jclass class_of_this,
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jobject jthis, const char *object_classname,
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const char *name_of_field, jobject obj);
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/* Set an individual field in a Db* object.
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* The field must be an integer type.
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*/
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void set_int_field(JNIEnv *jnienv, jclass class_of_this,
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jobject jthis, const char *name_of_field, jint value);
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/* Set an individual field in a Db* object.
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* The field must be an integer type.
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*/
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void set_long_field(JNIEnv *jnienv, jclass class_of_this,
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jobject jthis, const char *name_of_field, jlong value);
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/* Set an individual field in a Db* object.
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* The field must be an DbLsn type.
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*/
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void set_lsn_field(JNIEnv *jnienv, jclass class_of_this,
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jobject jthis, const char *name_of_field, DB_LSN value);
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/* Values of expect_mask
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*/
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static const int EXCEPTION_FILE_NOT_FOUND = 0x0001;
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/* Report an exception back to the java side.
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*/
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void report_exception(JNIEnv *jnienv, const char *text, int err,
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unsigned long expect_mask);
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/* Report an error via the errcall mechanism.
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*/
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void report_errcall(JNIEnv *jnienv, jobject errcall,
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jstring prefix, const char *message);
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/* If the object is null, report an exception and return false (0),
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* otherwise return true (1).
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*/
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int verify_non_null(JNIEnv *jnienv, void *obj);
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/* If the error code is non-zero, report an exception and return false (0),
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* otherwise return true (1).
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*/
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int verify_return(JNIEnv *jnienv, int err, unsigned long expect_mask);
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/* Create an object of the given class, calling its default constructor.
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*/
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jobject create_default_object(JNIEnv *jnienv, const char *class_name);
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/* Convert an DB object to a Java encapsulation of that object.
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* Note: This implementation creates a new Java object on each call,
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* so it is generally useful when a new DB object has just been created.
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*/
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jobject convert_object(JNIEnv *jnienv, const char *class_name, void *dbobj);
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/* Create a copy of the string
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*/
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char *dup_string(const char *str);
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/* Create a malloc'ed copy of the java string.
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* Caller must free it.
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*/
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char *get_c_string(JNIEnv *jnienv, jstring jstr);
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/* Create a java string from the given string
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*/
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jstring get_java_string(JNIEnv *jnienv, const char* string);
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/* Convert a java object to the various C pointers they represent.
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*/
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DB *get_DB (JNIEnv *jnienv, jobject obj);
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DB_BTREE_STAT *get_DB_BTREE_STAT (JNIEnv *jnienv, jobject obj);
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DBC *get_DBC (JNIEnv *jnienv, jobject obj);
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DB_ENV *get_DB_ENV (JNIEnv *jnienv, jobject obj);
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DB_ENV_JAVAINFO *get_DB_ENV_JAVAINFO (JNIEnv *jnienv, jobject obj);
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DB_HASH_STAT *get_DB_HASH_STAT (JNIEnv *jnienv, jobject obj);
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DB_JAVAINFO *get_DB_JAVAINFO (JNIEnv *jnienv, jobject obj);
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DB_LOCK *get_DB_LOCK (JNIEnv *jnienv, jobject obj);
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DB_LOG_STAT *get_DB_LOG_STAT (JNIEnv *jnienv, jobject obj);
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DB_LSN *get_DB_LSN (JNIEnv *jnienv, jobject obj);
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DB_MPOOL_FSTAT *get_DB_MPOOL_FSTAT(JNIEnv *jnienv, jobject obj);
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DB_MPOOL_STAT *get_DB_MPOOL_STAT (JNIEnv *jnienv, jobject obj);
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DB_QUEUE_STAT *get_DB_QUEUE_STAT (JNIEnv *jnienv, jobject obj);
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DB_TXN *get_DB_TXN (JNIEnv *jnienv, jobject obj);
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DB_TXN_STAT *get_DB_TXN_STAT (JNIEnv *jnienv, jobject obj);
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DBT *get_DBT (JNIEnv *jnienv, jobject obj);
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DBT_JAVAINFO *get_DBT_JAVAINFO (JNIEnv *jnienv, jobject obj);
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/* From a C object, create a Java object.
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*/
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jobject get_DbBtreeStat (JNIEnv *jnienv, DB_BTREE_STAT *dbobj);
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jobject get_Dbc (JNIEnv *jnienv, DBC *dbobj);
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jobject get_DbHashStat (JNIEnv *jnienv, DB_HASH_STAT *dbobj);
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jobject get_DbLogStat (JNIEnv *jnienv, DB_LOG_STAT *dbobj);
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jobject get_DbLsn (JNIEnv *jnienv, DB_LSN dbobj);
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jobject get_DbMpoolStat (JNIEnv *jnienv, DB_MPOOL_STAT *dbobj);
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jobject get_DbMpoolFStat (JNIEnv *jnienv, DB_MPOOL_FSTAT *dbobj);
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jobject get_DbQueueStat (JNIEnv *jnienv, DB_QUEUE_STAT *dbobj);
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jobject get_Dbt (JNIEnv *jnienv, DBT *dbt);
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jobject get_DbTxn (JNIEnv *jnienv, DB_TXN *dbobj);
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jobject get_DbTxnStat (JNIEnv *jnienv, DB_TXN_STAT *dbobj);
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/* The java names of DB classes */
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extern const char * const name_DB;
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extern const char * const name_DB_BTREE_STAT;
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extern const char * const name_DBC;
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extern const char * const name_DB_DEADLOCK_EX;
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extern const char * const name_DB_ENV;
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extern const char * const name_DB_EXCEPTION;
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extern const char * const name_DB_HASH_STAT;
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extern const char * const name_DB_LOCK;
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extern const char * const name_DB_LOCK_STAT;
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extern const char * const name_DB_LOG_STAT;
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extern const char * const name_DB_LSN;
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extern const char * const name_DB_MEMORY_EX;
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extern const char * const name_DB_MPOOL_FSTAT;
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extern const char * const name_DB_MPOOL_STAT;
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extern const char * const name_DB_QUEUE_STAT;
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extern const char * const name_DB_RUNRECOVERY_EX;
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extern const char * const name_DBT;
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extern const char * const name_DB_TXN;
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extern const char * const name_DB_TXN_STAT;
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extern const char * const name_DB_TXN_STAT_ACTIVE;
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extern const char * const name_DbAppendRecno;
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extern const char * const name_DbBtreeCompare;
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extern const char * const name_DbBtreePrefix;
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extern const char * const name_DbDupCompare;
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extern const char * const name_DbEnvFeedback;
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extern const char * const name_DbErrcall;
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extern const char * const name_DbFeedback;
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extern const char * const name_DbHash;
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extern const char * const name_DbRecoveryInit;
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extern const char * const name_DbTxnRecover;
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extern const char * const string_signature;
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#define JAVADB_RO_ACCESS(j_class, j_fieldtype, j_field, c_type, c_field) \
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JNIEXPORT j_fieldtype JNICALL \
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Java_com_sleepycat_db_##j_class##_get_1##j_field \
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(JNIEnv *jnienv, jobject jthis) \
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{ \
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c_type *db_this = get_##c_type(jnienv, jthis); \
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\
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if (verify_non_null(jnienv, db_this)) { \
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return db_this->c_field; \
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} \
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return 0; \
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}
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#define JAVADB_WO_ACCESS(j_class, j_fieldtype, j_field, c_type, c_field) \
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JNIEXPORT void JNICALL \
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Java_com_sleepycat_db_##j_class##_set_1##j_field \
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(JNIEnv *jnienv, jobject jthis, j_fieldtype value) \
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{ \
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c_type *db_this = get_##c_type(jnienv, jthis); \
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\
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if (verify_non_null(jnienv, db_this)) { \
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db_this->c_field = value; \
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} \
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}
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/* This is a variant of the JAVADB_WO_ACCESS macro to define a simple set_
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* method using a C "method" call. These should be used with set_
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* methods that cannot invoke java 'callbacks' (no set_ method currently
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* does that). That assumption allows us to optimize (and simplify)
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* by not calling API_BEGIN/END macros.
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*/
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#define JAVADB_WO_ACCESS_METHOD(j_class, j_fieldtype, \
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j_field, c_type, c_field) \
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JNIEXPORT void JNICALL \
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Java_com_sleepycat_db_##j_class##_set_1##j_field \
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(JNIEnv *jnienv, jobject jthis, j_fieldtype value) \
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{ \
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c_type *db_this; \
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int err; \
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\
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db_this = get_##c_type(jnienv, jthis); \
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if (verify_non_null(jnienv, db_this)) { \
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err = db_this->set_##c_field(db_this, value); \
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verify_return(jnienv, err, 0); \
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} \
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}
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#define JAVADB_RW_ACCESS(j_class, j_fieldtype, j_field, c_type, c_field) \
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JAVADB_RO_ACCESS(j_class, j_fieldtype, j_field, c_type, c_field) \
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JAVADB_WO_ACCESS(j_class, j_fieldtype, j_field, c_type, c_field)
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#define JAVADB_WO_ACCESS_STRING(j_class, j_field, c_type, c_field) \
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JNIEXPORT void JNICALL \
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Java_com_sleepycat_db_##j_class##_set_1##j_field \
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(JNIEnv *jnienv, jobject jthis, jstring value) \
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{ \
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c_type *db_this; \
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int err; \
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\
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db_this = get_##c_type(jnienv, jthis); \
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if (verify_non_null(jnienv, db_this)) { \
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err = db_this->set_##c_field(db_this, \
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(*jnienv)->GetStringUTFChars(jnienv, value, NULL)); \
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verify_return(jnienv, err, 0); \
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} \
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}
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#define JAVADB_API_BEGIN(db, jthis) \
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if ((db) != NULL) \
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((DB_JAVAINFO*)(db)->cj_internal)->jdbref_ = \
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((DB_ENV_JAVAINFO*)((db)->dbenv->cj_internal))->jdbref_ = (jthis)
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#define JAVADB_API_END(db) \
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if ((db) != NULL) \
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((DB_JAVAINFO*)(db)->cj_internal)->jdbref_ = \
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((DB_ENV_JAVAINFO*)((db)->dbenv->cj_internal))->jdbref_ = 0
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#define JAVADB_ENV_API_BEGIN(dbenv, jthis) \
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if ((dbenv) != NULL) \
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((DB_ENV_JAVAINFO*)((dbenv)->cj_internal))->jenvref_ = (jthis)
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#define JAVADB_ENV_API_END(dbenv) \
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if ((dbenv) != NULL) \
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((DB_ENV_JAVAINFO*)((dbenv)->cj_internal))->jenvref_ = 0
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#endif /* !_JAVA_UTIL_H_ */
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