java_util.h
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上传日期:2022-05-23
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- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997-2002
- * Sleepycat Software. All rights reserved.
- *
- * $Id: java_util.h,v 11.44 2002/08/29 14:22:24 margo Exp $
- */
- #ifndef _JAVA_UTIL_H_
- #define _JAVA_UTIL_H_
- #ifdef _MSC_VER
- /*
- * These are level 4 warnings that are explicitly disabled.
- * With Visual C++, by default you do not see above level 3 unless
- * you use /W4. But we like to compile with the highest level
- * warnings to catch other errors.
- *
- * 4201: nameless struct/union
- * triggered by standard include file <winnt.h>
- *
- * 4244: '=' : convert from '__int64' to 'unsigned int', possible loss of data
- * results from making size_t data members correspond to jlongs
- *
- * 4514: unreferenced inline function has been removed
- * jni.h defines methods that are not called
- *
- * 4127: conditional expression is constant
- * occurs because of arg in JAVADB_RW_ACCESS_STRING macro
- */
- #pragma warning(disable: 4244 4201 4514 4127)
- #endif
- #include "db_config.h"
- #include "db.h"
- #include "db_int.h"
- #include <jni.h>
- #include "java_info.h"
- #include "java_locked.h"
- #include <string.h> /* needed for memset */
- #define DB_PACKAGE_NAME "com/sleepycat/db/"
- /* Union to convert longs to pointers (see {get,set}_private_dbobj). */
- typedef union {
- jlong java_long;
- void *ptr;
- } long_to_ptr;
- /****************************************************************
- *
- * Utility functions and definitions used by "glue" functions.
- */
- #define NOT_IMPLEMENTED(str)
- report_exception(jnienv, str /*concatenate*/ ": not implemented", 0)
- /*
- * Get, delete a global reference.
- * Making this operation a function call allows for
- * easier tracking for debugging. Global references
- * are mostly grabbed at 'open' and 'close' points,
- * so there shouldn't be a big performance hit.
- *
- * Macro-izing this makes it easier to add debugging code
- * to track unreleased references.
- */
- #ifdef DBJAVA_DEBUG
- #include <unistd.h>
- static void wrdebug(const char *str)
- {
- write(2, str, strlen(str));
- write(2, "n", 1);
- }
- static jobject debug_new_global_ref(JNIEnv *jnienv, jobject obj, const char *s)
- {
- wrdebug(s);
- return ((*jnienv)->NewGlobalRef(jnienv, obj));
- }
- static void debug_delete_global_ref(JNIEnv *jnienv, jobject obj, const char *s)
- {
- wrdebug(s);
- (*jnienv)->DeleteGlobalRef(jnienv, obj);
- }
- #define NEW_GLOBAL_REF(jnienv, obj)
- debug_new_global_ref(jnienv, obj, "+Ref: " #obj)
- #define DELETE_GLOBAL_REF(jnienv, obj)
- debug_delete_global_ref(jnienv, obj, "-Ref: " #obj)
- #else
- #define NEW_GLOBAL_REF(jnienv, obj) (*jnienv)->NewGlobalRef(jnienv, obj)
- #define DELETE_GLOBAL_REF(jnienv, obj) (*jnienv)->DeleteGlobalRef(jnienv, obj)
- #define wrdebug(x)
- #endif
- /*
- * Do any one time initialization, especially initializing any
- * unchanging methodIds, fieldIds, etc.
- */
- void one_time_init(JNIEnv *jnienv);
- /*
- * Get the current JNIEnv from the java VM.
- * If the jvm argument is null, uses the default
- * jvm stored during the first invocation.
- */
- JNIEnv *get_jnienv(JavaVM *jvm);
- /*
- * Get the private data from a Db* object that points back to a C DB_* object.
- * The private data is stored in the object as a Java long (64 bits),
- * which is long enough to store a pointer on current architectures.
- */
- void *get_private_dbobj(JNIEnv *jnienv, const char *classname,
- jobject obj);
- /*
- * Set the private data in a Db* object that points back to a C DB_* object.
- * The private data is stored in the object as a Java long (64 bits),
- * which is long enough to store a pointer on current architectures.
- */
- void set_private_dbobj(JNIEnv *jnienv, const char *classname,
- jobject obj, void *value);
- /*
- * Get the private data in a Db/DbEnv object that holds additional 'side data'.
- * The private data is stored in the object as a Java long (64 bits),
- * which is long enough to store a pointer on current architectures.
- */
- void *get_private_info(JNIEnv *jnienv, const char *classname,
- jobject obj);
- /*
- * Set the private data in a Db/DbEnv object that holds additional 'side data'.
- * The private data is stored in the object as a Java long (64 bits),
- * which is long enough to store a pointer on current architectures.
- */
- void set_private_info(JNIEnv *jnienv, const char *classname,
- jobject obj, void *value);
- /*
- * Given a non-qualified name (e.g. "foo"), get the class handle
- * for the fully qualified name (e.g. "com.sleepycat.db.foo")
- */
- jclass get_class(JNIEnv *jnienv, const char *classname);
- /*
- * Set an individual field in a Db* object.
- * The field must be a DB object type.
- */
- void set_object_field(JNIEnv *jnienv, jclass class_of_this,
- jobject jthis, const char *object_classname,
- const char *name_of_field, jobject obj);
- /*
- * Set an individual field in a Db* object.
- * The field must be an integer type.
- */
- void set_int_field(JNIEnv *jnienv, jclass class_of_this,
- jobject jthis, const char *name_of_field, jint value);
- /*
- * Set an individual field in a Db* object.
- * The field must be an integer type.
- */
- void set_long_field(JNIEnv *jnienv, jclass class_of_this,
- jobject jthis, const char *name_of_field, jlong value);
- /*
- * Set an individual field in a Db* object.
- * The field must be an DbLsn type.
- */
- void set_lsn_field(JNIEnv *jnienv, jclass class_of_this,
- jobject jthis, const char *name_of_field, DB_LSN value);
- /*
- * Values of flags for verify_return() and report_exception().
- * These indicate what sort of exceptions the method may throw
- * (in addition to DbException).
- */
- static const u_int32_t EXCEPTION_FILE_NOT_FOUND = 0x0001; /*FileNotFound*/
- /*
- * Report an exception back to the java side.
- */
- void report_exception(JNIEnv *jnienv, const char *text,
- int err, unsigned long expect_mask);
- /*
- * Report an exception back to the java side, for the specific
- * case of DB_LOCK_NOTGRANTED, as more things are added to the
- * constructor of this type of exception.
- */
- void report_notgranted_exception(JNIEnv *jnienv, const char *text,
- db_lockop_t op, db_lockmode_t mode,
- jobject jdbt, jobject jlock, int index);
- /*
- * Create an exception object and return it.
- * The given class must have a constructor that has a
- * constructor with args (java.lang.String text, int errno);
- * DbException and its subclasses fit this bill.
- */
- jobject create_exception(JNIEnv *jnienv, jstring text,
- int err, jclass dbexcept);
- /*
- * Report an error via the errcall mechanism.
- */
- void report_errcall(JNIEnv *jnienv, jobject errcall,
- jstring prefix, const char *message);
- /*
- * If the object is null, report an exception and return false (0),
- * otherwise return true (1).
- */
- int verify_non_null(JNIEnv *jnienv, void *obj);
- /*
- * If the error code is non-zero, report an exception and return false (0),
- * otherwise return true (1).
- */
- int verify_return(JNIEnv *jnienv, int err, unsigned long flags);
- /*
- * Verify that there was no memory error due to undersized Dbt.
- * If there is report a DbMemoryException, with the Dbt attached
- * and return false (0), otherwise return true (1).
- */
- int verify_dbt(JNIEnv *jnienv, int err, LOCKED_DBT *locked_dbt);
- /*
- * Create an object of the given class, calling its default constructor.
- */
- jobject create_default_object(JNIEnv *jnienv, const char *class_name);
- /*
- * Create a Dbt object, , calling its default constructor.
- */
- jobject create_dbt(JNIEnv *jnienv, const char *class_name);
- /*
- * Convert an DB object to a Java encapsulation of that object.
- * Note: This implementation creates a new Java object on each call,
- * so it is generally useful when a new DB object has just been created.
- */
- jobject convert_object(JNIEnv *jnienv, const char *class_name, void *dbobj);
- /*
- * Create a copy of the java string using __os_malloc.
- * Caller must free it.
- */
- char *get_c_string(JNIEnv *jnienv, jstring jstr);
- /*
- * Create a java string from the given string
- */
- jstring get_java_string(JNIEnv *jnienv, const char* string);
- /*
- * Convert a java object to the various C pointers they represent.
- */
- DB *get_DB (JNIEnv *jnienv, jobject obj);
- DB_BTREE_STAT *get_DB_BTREE_STAT (JNIEnv *jnienv, jobject obj);
- DBC *get_DBC (JNIEnv *jnienv, jobject obj);
- DB_ENV *get_DB_ENV (JNIEnv *jnienv, jobject obj);
- DB_ENV_JAVAINFO *get_DB_ENV_JAVAINFO (JNIEnv *jnienv, jobject obj);
- DB_HASH_STAT *get_DB_HASH_STAT (JNIEnv *jnienv, jobject obj);
- DB_JAVAINFO *get_DB_JAVAINFO (JNIEnv *jnienv, jobject obj);
- DB_LOCK *get_DB_LOCK (JNIEnv *jnienv, jobject obj);
- DB_LOGC *get_DB_LOGC (JNIEnv *jnienv, jobject obj);
- DB_LOG_STAT *get_DB_LOG_STAT (JNIEnv *jnienv, jobject obj);
- DB_LSN *get_DB_LSN (JNIEnv *jnienv, jobject obj);
- DB_MPOOL_FSTAT *get_DB_MPOOL_FSTAT(JNIEnv *jnienv, jobject obj);
- DB_MPOOL_STAT *get_DB_MPOOL_STAT (JNIEnv *jnienv, jobject obj);
- DB_QUEUE_STAT *get_DB_QUEUE_STAT (JNIEnv *jnienv, jobject obj);
- DB_TXN *get_DB_TXN (JNIEnv *jnienv, jobject obj);
- DB_TXN_STAT *get_DB_TXN_STAT (JNIEnv *jnienv, jobject obj);
- DBT *get_DBT (JNIEnv *jnienv, jobject obj);
- DBT_JAVAINFO *get_DBT_JAVAINFO (JNIEnv *jnienv, jobject obj);
- /*
- * From a C object, create a Java object.
- */
- jobject get_DbBtreeStat (JNIEnv *jnienv, DB_BTREE_STAT *dbobj);
- jobject get_Dbc (JNIEnv *jnienv, DBC *dbobj);
- jobject get_DbHashStat (JNIEnv *jnienv, DB_HASH_STAT *dbobj);
- jobject get_DbLogc (JNIEnv *jnienv, DB_LOGC *dbobj);
- jobject get_DbLogStat (JNIEnv *jnienv, DB_LOG_STAT *dbobj);
- jobject get_DbLsn (JNIEnv *jnienv, DB_LSN dbobj);
- jobject get_DbMpoolStat (JNIEnv *jnienv, DB_MPOOL_STAT *dbobj);
- jobject get_DbMpoolFStat (JNIEnv *jnienv, DB_MPOOL_FSTAT *dbobj);
- jobject get_DbQueueStat (JNIEnv *jnienv, DB_QUEUE_STAT *dbobj);
- jobject get_const_Dbt (JNIEnv *jnienv, const DBT *dbt, DBT_JAVAINFO **retp);
- jobject get_Dbt (JNIEnv *jnienv, DBT *dbt, DBT_JAVAINFO **retp);
- jobject get_DbTxn (JNIEnv *jnienv, DB_TXN *dbobj);
- jobject get_DbTxnStat (JNIEnv *jnienv, DB_TXN_STAT *dbobj);
- /* The java names of DB classes */
- extern const char * const name_DB;
- extern const char * const name_DB_BTREE_STAT;
- extern const char * const name_DBC;
- extern const char * const name_DB_DEADLOCK_EX;
- extern const char * const name_DB_ENV;
- extern const char * const name_DB_EXCEPTION;
- extern const char * const name_DB_HASH_STAT;
- extern const char * const name_DB_LOCK;
- extern const char * const name_DB_LOCK_STAT;
- extern const char * const name_DB_LOGC;
- extern const char * const name_DB_LOG_STAT;
- extern const char * const name_DB_LSN;
- extern const char * const name_DB_MEMORY_EX;
- extern const char * const name_DB_MPOOL_FSTAT;
- extern const char * const name_DB_MPOOL_STAT;
- extern const char * const name_DB_LOCKNOTGRANTED_EX;
- extern const char * const name_DB_PREPLIST;
- extern const char * const name_DB_QUEUE_STAT;
- extern const char * const name_DB_REP_STAT;
- extern const char * const name_DB_RUNRECOVERY_EX;
- extern const char * const name_DBT;
- extern const char * const name_DB_TXN;
- extern const char * const name_DB_TXN_STAT;
- extern const char * const name_DB_TXN_STAT_ACTIVE;
- extern const char * const name_DB_UTIL;
- extern const char * const name_DbAppendRecno;
- extern const char * const name_DbBtreeCompare;
- extern const char * const name_DbBtreePrefix;
- extern const char * const name_DbDupCompare;
- extern const char * const name_DbEnvFeedback;
- extern const char * const name_DbErrcall;
- extern const char * const name_DbFeedback;
- extern const char * const name_DbHash;
- extern const char * const name_DbRecoveryInit;
- extern const char * const name_DbRepTransport;
- extern const char * const name_DbSecondaryKeyCreate;
- extern const char * const name_DbTxnRecover;
- extern const char * const name_RepElectResult;
- extern const char * const name_RepProcessMessage;
- extern const char * const string_signature;
- extern jfieldID fid_Dbt_data;
- extern jfieldID fid_Dbt_offset;
- extern jfieldID fid_Dbt_size;
- extern jfieldID fid_Dbt_ulen;
- extern jfieldID fid_Dbt_dlen;
- extern jfieldID fid_Dbt_doff;
- extern jfieldID fid_Dbt_flags;
- extern jfieldID fid_Dbt_must_create_data;
- extern jfieldID fid_DbLockRequest_op;
- extern jfieldID fid_DbLockRequest_mode;
- extern jfieldID fid_DbLockRequest_timeout;
- extern jfieldID fid_DbLockRequest_obj;
- extern jfieldID fid_DbLockRequest_lock;
- extern jfieldID fid_RepProcessMessage_envid;
- #define JAVADB_ARGS JNIEnv *jnienv, jobject jthis
- #define JAVADB_GET_FLD(j_class, j_fieldtype, j_field, c_type, c_field)
- JNIEXPORT j_fieldtype JNICALL
- Java_com_sleepycat_db_##j_class##_get_1##j_field
- (JAVADB_ARGS)
- {
- c_type *db= get_##c_type(jnienv, jthis);
-
- if (verify_non_null(jnienv, db))
- return (db->c_field);
- return (0);
- }
- #define JAVADB_SET_FLD(j_class, j_fieldtype, j_field, c_type, c_field)
- JNIEXPORT void JNICALL
- Java_com_sleepycat_db_##j_class##_set_1##j_field
- (JAVADB_ARGS, j_fieldtype value)
- {
- c_type *db= get_##c_type(jnienv, jthis);
-
- if (verify_non_null(jnienv, db))
- db->c_field = value;
- }
- #define JAVADB_METHOD(_meth, _argspec, c_type, c_meth, _args)
- JNIEXPORT void JNICALL Java_com_sleepycat_db_##_meth _argspec
- {
- c_type *c_this = get_##c_type(jnienv, jthis);
- int ret;
-
- if (!verify_non_null(jnienv, c_this))
- return;
- ret = c_this->c_meth _args;
- if (!DB_RETOK_STD(ret))
- report_exception(jnienv, db_strerror(ret), ret, 0);
- }
- #define JAVADB_METHOD_INT(_meth, _argspec, c_type, c_meth, _args, _retok)
- JNIEXPORT jint JNICALL Java_com_sleepycat_db_##_meth _argspec
- {
- c_type *c_this = get_##c_type(jnienv, jthis);
- int ret;
-
- if (!verify_non_null(jnienv, c_this))
- return (0);
- ret = c_this->c_meth _args;
- if (!_retok(ret))
- report_exception(jnienv, db_strerror(ret), ret, 0);
- return ((jint)ret);
- }
- #define JAVADB_SET_METH(j_class, j_type, j_fld, c_type, c_field)
- JAVADB_METHOD(j_class##_set_1##j_fld, (JAVADB_ARGS, j_type val), c_type,
- set_##c_field, (c_this, val))
- #define JAVADB_SET_METH_STR(j_class, j_fld, c_type, c_field)
- JAVADB_METHOD(j_class##_set_1##j_fld, (JAVADB_ARGS, jstring val), c_type,
- set_##c_field, (c_this, (*jnienv)->GetStringUTFChars(jnienv, val, NULL)))
- /*
- * These macros are used by code generated by the s_java script.
- */
- #define JAVADB_STAT_INT(env, cl, jobj, statp, name)
- set_int_field(jnienv, cl, jobj, #name, statp->name)
- #define JAVADB_STAT_LSN(env, cl, jobj, statp, name)
- set_lsn_field(jnienv, cl, jobj, #name, statp->name)
- #define JAVADB_STAT_LONG(env, cl, jobj, statp, name)
- set_long_field(jnienv, cl, jobj, #name, statp->name)
- /*
- * We build the active list separately.
- */
- #define JAVADB_STAT_ACTIVE(env, cl, jobj, statp, name)
- do {} while(0)
- #endif /* !_JAVA_UTIL_H_ */