java_Dbc.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:6k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: java_Dbc.c,v 11.23 2002/08/06 05:19:06 bostic Exp $";
- #endif /* not lint */
- #include <jni.h>
- #include <errno.h>
- #include <stdlib.h>
- #include <string.h>
- #ifdef DIAGNOSTIC
- #include <stdio.h>
- #endif
- #include "db_int.h"
- #include "java_util.h"
- #include "com_sleepycat_db_Dbc.h"
- JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbc_close
- (JNIEnv *jnienv, jobject jthis)
- {
- int err;
- DBC *dbc = get_DBC(jnienv, jthis);
- if (!verify_non_null(jnienv, dbc))
- return;
- err = dbc->c_close(dbc);
- if (verify_return(jnienv, err, 0)) {
- set_private_dbobj(jnienv, name_DBC, jthis, 0);
- }
- }
- JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbc_count
- (JNIEnv *jnienv, jobject jthis, jint flags)
- {
- int err;
- DBC *dbc = get_DBC(jnienv, jthis);
- db_recno_t count;
- if (!verify_non_null(jnienv, dbc))
- return (0);
- err = dbc->c_count(dbc, &count, flags);
- verify_return(jnienv, err, 0);
- return (count);
- }
- JAVADB_METHOD_INT(Dbc_del, (JAVADB_ARGS, jint flags), DBC,
- c_del, (c_this, flags), DB_RETOK_DBCDEL)
- JNIEXPORT jobject JNICALL Java_com_sleepycat_db_Dbc_dup
- (JNIEnv *jnienv, jobject jthis, jint flags)
- {
- int err;
- DBC *dbc = get_DBC(jnienv, jthis);
- DBC *dbc_ret = NULL;
- if (!verify_non_null(jnienv, dbc))
- return (0);
- err = dbc->c_dup(dbc, &dbc_ret, flags);
- if (!verify_return(jnienv, err, 0))
- return (0);
- return (get_Dbc(jnienv, dbc_ret));
- }
- JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbc_get
- (JNIEnv *jnienv, jobject jthis,
- /*Dbt*/ jobject key, /*Dbt*/ jobject data, jint flags)
- {
- int err, retry, op_flags;
- DBC *dbc;
- DB_ENV *dbenv;
- LOCKED_DBT lkey, ldata;
- OpKind keyop, dataop;
- /*
- * Depending on flags, the user may be supplying the key,
- * or else we may have to retrieve it.
- */
- err = 0;
- keyop = outOp;
- dataop = outOp;
- op_flags = flags & DB_OPFLAGS_MASK;
- if (op_flags == DB_SET) {
- keyop = inOp;
- }
- else if (op_flags == DB_SET_RANGE ||
- op_flags == DB_SET_RECNO) {
- keyop = inOutOp;
- }
- else if (op_flags == DB_GET_BOTH || op_flags == DB_GET_BOTH_RANGE) {
- keyop = inOutOp;
- dataop = inOutOp;
- }
- dbc = get_DBC(jnienv, jthis);
- if (!verify_non_null(jnienv, dbc))
- return (0);
- dbenv = dbc->dbp->dbenv;
- if (locked_dbt_get(&lkey, jnienv, dbenv, key, keyop) != 0)
- goto out2;
- if (locked_dbt_get(&ldata, jnienv, dbenv, data, dataop) != 0)
- goto out1;
- if (!verify_non_null(jnienv, dbc))
- goto out1;
- for (retry = 0; retry < 3; retry++) {
- err = dbc->c_get(dbc,
- &lkey.javainfo->dbt, &ldata.javainfo->dbt, flags);
- /*
- * If we failed due to lack of memory in our DBT arrays,
- * retry.
- */
- if (err != ENOMEM)
- break;
- if (!locked_dbt_realloc(&lkey, jnienv,
- dbenv) && !locked_dbt_realloc(&ldata, jnienv, dbenv))
- break;
- }
- out1:
- locked_dbt_put(&ldata, jnienv, dbenv);
- out2:
- locked_dbt_put(&lkey, jnienv, dbenv);
- if (!DB_RETOK_DBCGET(err)) {
- if (verify_dbt(jnienv, err, &lkey) &&
- verify_dbt(jnienv, err, &ldata))
- verify_return(jnienv, err, 0);
- }
- return (err);
- }
- JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbc_pget
- (JNIEnv *jnienv, jobject jthis,
- /*Dbt*/ jobject key, /*Dbt*/ jobject pkey, /*Dbt*/ jobject data, jint flags)
- {
- int err, retry, op_flags;
- DBC *dbc;
- DB_ENV *dbenv;
- LOCKED_DBT lkey, lpkey, ldata;
- OpKind keyop, pkeyop, dataop;
- /*
- * Depending on flags, the user may be supplying the key,
- * or else we may have to retrieve it.
- */
- err = 0;
- keyop = outOp;
- pkeyop = outOp;
- dataop = outOp;
- op_flags = flags & DB_OPFLAGS_MASK;
- if (op_flags == DB_SET) {
- keyop = inOp;
- }
- else if (op_flags == DB_SET_RANGE ||
- op_flags == DB_SET_RECNO) {
- keyop = inOutOp;
- }
- else if (op_flags == DB_GET_BOTH || op_flags == DB_GET_BOTH_RANGE) {
- pkeyop = inOutOp;
- keyop = inOutOp;
- dataop = inOutOp;
- }
- dbc = get_DBC(jnienv, jthis);
- if (!verify_non_null(jnienv, dbc))
- return (0);
- dbenv = dbc->dbp->dbenv;
- if (locked_dbt_get(&lkey, jnienv, dbenv, key, keyop) != 0)
- goto out3;
- if (locked_dbt_get(&lpkey, jnienv, dbenv, pkey, pkeyop) != 0)
- goto out2;
- if (locked_dbt_get(&ldata, jnienv, dbenv, data, dataop) != 0)
- goto out1;
- if (!verify_non_null(jnienv, dbc))
- goto out1;
- for (retry = 0; retry < 3; retry++) {
- err = dbc->c_pget(dbc, &lkey.javainfo->dbt,
- &lpkey.javainfo->dbt, &ldata.javainfo->dbt, flags);
- /*
- * If we failed due to lack of memory in our DBT arrays,
- * retry.
- */
- if (err != ENOMEM)
- break;
- if (!locked_dbt_realloc(&lkey, jnienv, dbenv) &&
- !locked_dbt_realloc(&lpkey, jnienv, dbenv) &&
- !locked_dbt_realloc(&ldata, jnienv, dbenv))
- break;
- }
- out1:
- locked_dbt_put(&ldata, jnienv, dbenv);
- out2:
- locked_dbt_put(&lpkey, jnienv, dbenv);
- out3:
- locked_dbt_put(&lkey, jnienv, dbenv);
- if (!DB_RETOK_DBCGET(err)) {
- if (verify_dbt(jnienv, err, &lkey) &&
- verify_dbt(jnienv, err, &lpkey) &&
- verify_dbt(jnienv, err, &ldata))
- verify_return(jnienv, err, 0);
- }
- return (err);
- }
- JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbc_put
- (JNIEnv *jnienv, jobject jthis,
- /*Dbt*/ jobject key, /*Dbt*/ jobject data, jint flags)
- {
- int err;
- DBC *dbc;
- DB_ENV *dbenv;
- LOCKED_DBT lkey, ldata;
- OpKind keyop;
- err = 0;
- dbc = get_DBC(jnienv, jthis);
- if (!verify_non_null(jnienv, dbc))
- return (0);
- dbenv = dbc->dbp->dbenv;
- keyop = (dbc->dbp->type == DB_RECNO &&
- (flags == DB_BEFORE || flags == DB_AFTER)) ? outOp : inOp;
- if (locked_dbt_get(&lkey, jnienv, dbenv, key, keyop) != 0)
- goto out2;
- if (locked_dbt_get(&ldata, jnienv, dbenv, data, inOp) != 0)
- goto out1;
- if (!verify_non_null(jnienv, dbc))
- goto out1;
- err = dbc->c_put(dbc, &lkey.javainfo->dbt, &ldata.javainfo->dbt, flags);
- if (!DB_RETOK_DBCPUT(err))
- verify_return(jnienv, err, 0);
- out1:
- locked_dbt_put(&ldata, jnienv, dbenv);
- out2:
- locked_dbt_put(&lkey, jnienv, dbenv);
- return (err);
- }
- JNIEXPORT void JNICALL Java_com_sleepycat_db_Dbc_finalize
- (JNIEnv *jnienv, jobject jthis)
- {
- /*
- * Free any data related to DBC here.
- * If we ever have java-only data embedded in the DBC
- * and need to do this, we'll have to track Dbc's
- * according to which Db owns them, just as
- * we track Db's according to which DbEnv owns them.
- * That's necessary to avoid double freeing that
- * comes about when closes interact with GC.
- */
- #ifdef DIAGNOSTIC
- DBC *dbc;
- dbc = get_DBC(jnienv, jthis);
- if (dbc != NULL)
- fprintf(stderr, "Java API: Dbc has not been closedn");
- #else
- COMPQUIET(jnienv, NULL);
- COMPQUIET(jthis, NULL);
- #endif
- }