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442 lines
15 KiB
C
442 lines
15 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997-2002
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* Sleepycat Software. All rights reserved.
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*
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* $Id: java_util.h,v 11.44 2002/08/29 14:22:24 margo 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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/*
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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 "db_int.h"
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#include <jni.h>
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#include "java_info.h"
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#include "java_locked.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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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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#define NOT_IMPLEMENTED(str) \
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report_exception(jnienv, str /*concatenate*/ ": not implemented", 0)
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/*
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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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/*
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* Do any one time initialization, especially initializing any
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* unchanging methodIds, fieldIds, etc.
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*/
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void one_time_init(JNIEnv *jnienv);
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/*
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* Get the current JNIEnv from the java VM.
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* If the jvm argument is null, uses the default
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* jvm stored during the first invocation.
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*/
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JNIEnv *get_jnienv(JavaVM *jvm);
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/*
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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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/*
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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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/*
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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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/*
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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 handle
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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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/*
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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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/*
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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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/*
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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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/*
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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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/*
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* Values of flags for verify_return() and report_exception().
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* These indicate what sort of exceptions the method may throw
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* (in addition to DbException).
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*/
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static const u_int32_t EXCEPTION_FILE_NOT_FOUND = 0x0001; /*FileNotFound*/
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/*
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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,
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int err, unsigned long expect_mask);
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/*
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* Report an exception back to the java side, for the specific
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* case of DB_LOCK_NOTGRANTED, as more things are added to the
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* constructor of this type of exception.
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*/
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void report_notgranted_exception(JNIEnv *jnienv, const char *text,
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db_lockop_t op, db_lockmode_t mode,
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jobject jdbt, jobject jlock, int index);
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/*
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* Create an exception object and return it.
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* The given class must have a constructor that has a
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* constructor with args (java.lang.String text, int errno);
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* DbException and its subclasses fit this bill.
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*/
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jobject create_exception(JNIEnv *jnienv, jstring text,
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int err, jclass dbexcept);
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/*
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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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/*
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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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/*
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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 flags);
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/*
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* Verify that there was no memory error due to undersized Dbt.
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* If there is report a DbMemoryException, with the Dbt attached
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* and return false (0), otherwise return true (1).
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*/
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int verify_dbt(JNIEnv *jnienv, int err, LOCKED_DBT *locked_dbt);
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/*
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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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/*
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* Create a Dbt object, , calling its default constructor.
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*/
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jobject create_dbt(JNIEnv *jnienv, const char *class_name);
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/*
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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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/*
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* Create a copy of the java string using __os_malloc.
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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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/*
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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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/*
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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_LOGC *get_DB_LOGC (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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/*
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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_DbLogc (JNIEnv *jnienv, DB_LOGC *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_const_Dbt (JNIEnv *jnienv, const DBT *dbt, DBT_JAVAINFO **retp);
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jobject get_Dbt (JNIEnv *jnienv, DBT *dbt, DBT_JAVAINFO **retp);
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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_LOGC;
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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_LOCKNOTGRANTED_EX;
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extern const char * const name_DB_PREPLIST;
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extern const char * const name_DB_QUEUE_STAT;
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extern const char * const name_DB_REP_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_DB_UTIL;
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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_DbRepTransport;
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extern const char * const name_DbSecondaryKeyCreate;
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extern const char * const name_DbTxnRecover;
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extern const char * const name_RepElectResult;
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extern const char * const name_RepProcessMessage;
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extern const char * const string_signature;
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extern jfieldID fid_Dbt_data;
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extern jfieldID fid_Dbt_offset;
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extern jfieldID fid_Dbt_size;
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extern jfieldID fid_Dbt_ulen;
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extern jfieldID fid_Dbt_dlen;
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extern jfieldID fid_Dbt_doff;
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extern jfieldID fid_Dbt_flags;
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extern jfieldID fid_Dbt_must_create_data;
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extern jfieldID fid_DbLockRequest_op;
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extern jfieldID fid_DbLockRequest_mode;
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extern jfieldID fid_DbLockRequest_timeout;
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extern jfieldID fid_DbLockRequest_obj;
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extern jfieldID fid_DbLockRequest_lock;
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extern jfieldID fid_RepProcessMessage_envid;
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#define JAVADB_ARGS JNIEnv *jnienv, jobject jthis
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#define JAVADB_GET_FLD(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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(JAVADB_ARGS) \
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{ \
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c_type *db= get_##c_type(jnienv, jthis); \
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\
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if (verify_non_null(jnienv, db)) \
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return (db->c_field); \
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return (0); \
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}
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#define JAVADB_SET_FLD(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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(JAVADB_ARGS, j_fieldtype value) \
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{ \
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c_type *db= get_##c_type(jnienv, jthis); \
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\
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if (verify_non_null(jnienv, db)) \
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db->c_field = value; \
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}
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#define JAVADB_METHOD(_meth, _argspec, c_type, c_meth, _args) \
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JNIEXPORT void JNICALL Java_com_sleepycat_db_##_meth _argspec \
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{ \
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c_type *c_this = get_##c_type(jnienv, jthis); \
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int ret; \
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\
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if (!verify_non_null(jnienv, c_this)) \
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return; \
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ret = c_this->c_meth _args; \
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if (!DB_RETOK_STD(ret)) \
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report_exception(jnienv, db_strerror(ret), ret, 0); \
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}
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#define JAVADB_METHOD_INT(_meth, _argspec, c_type, c_meth, _args, _retok) \
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JNIEXPORT jint JNICALL Java_com_sleepycat_db_##_meth _argspec \
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{ \
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c_type *c_this = get_##c_type(jnienv, jthis); \
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int ret; \
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\
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if (!verify_non_null(jnienv, c_this)) \
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return (0); \
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ret = c_this->c_meth _args; \
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if (!_retok(ret)) \
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report_exception(jnienv, db_strerror(ret), ret, 0); \
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return ((jint)ret); \
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}
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#define JAVADB_SET_METH(j_class, j_type, j_fld, c_type, c_field) \
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JAVADB_METHOD(j_class##_set_1##j_fld, (JAVADB_ARGS, j_type val), c_type, \
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set_##c_field, (c_this, val))
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#define JAVADB_SET_METH_STR(j_class, j_fld, c_type, c_field) \
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JAVADB_METHOD(j_class##_set_1##j_fld, (JAVADB_ARGS, jstring val), c_type, \
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set_##c_field, (c_this, (*jnienv)->GetStringUTFChars(jnienv, val, NULL)))
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/*
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* These macros are used by code generated by the s_java script.
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*/
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#define JAVADB_STAT_INT(env, cl, jobj, statp, name) \
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set_int_field(jnienv, cl, jobj, #name, statp->name)
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#define JAVADB_STAT_LSN(env, cl, jobj, statp, name) \
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set_lsn_field(jnienv, cl, jobj, #name, statp->name)
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#define JAVADB_STAT_LONG(env, cl, jobj, statp, name) \
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set_long_field(jnienv, cl, jobj, #name, statp->name)
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/*
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* We build the active list separately.
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*/
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#define JAVADB_STAT_ACTIVE(env, cl, jobj, statp, name) \
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do {} while(0)
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#endif /* !_JAVA_UTIL_H_ */
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