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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997, 1998, 1999, 2000
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: java_Dbc.c,v 11.10 2000/10/25 19:54:55 dda Exp $";
#endif /* not lint */
#include <jni.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#ifdef DIAGNOSTIC
#include <stdio.h>
#endif
#include "db.h"
#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);
}
JNIEXPORT jint JNICALL Java_com_sleepycat_db_Dbc_del
(JNIEnv *jnienv, jobject jthis, jint flags)
{
int err;
DBC *dbc = get_DBC(jnienv, jthis);
if (!verify_non_null(jnienv, dbc))
return (0);
err = dbc->c_del(dbc, flags);
if (err != DB_KEYEMPTY) {
verify_return(jnienv, err, 0);
}
return (err);
}
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;
JDBT dbkey, dbdata;
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) {
keyop = inOutOp;
dataop = inOutOp;
}
dbc = get_DBC(jnienv, jthis);
if (jdbt_lock(&dbkey, jnienv, key, keyop) != 0)
goto out2;
if (jdbt_lock(&dbdata, jnienv, data, dataop) != 0)
goto out1;
if (!verify_non_null(jnienv, dbc))
goto out1;
for (retry = 0; retry < 3; retry++) {
err = dbc->c_get(dbc, &dbkey.dbt->dbt, &dbdata.dbt->dbt, flags);
/* If we failed due to lack of memory in our DBT arrays,
* retry.
*/
if (err != ENOMEM)
break;
if (!jdbt_realloc(&dbkey, jnienv) && !jdbt_realloc(&dbdata, jnienv))
break;
}
if (err != DB_NOTFOUND) {
verify_return(jnienv, err, 0);
}
out1:
jdbt_unlock(&dbdata, jnienv);
out2:
jdbt_unlock(&dbkey, jnienv);
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;
JDBT dbkey, dbdata;
err = 0;
dbc = get_DBC(jnienv, jthis);
if (jdbt_lock(&dbkey, jnienv, key, inOp) != 0)
goto out2;
if (jdbt_lock(&dbdata, jnienv, data, inOp) != 0)
goto out1;
if (!verify_non_null(jnienv, dbc))
goto out1;
err = dbc->c_put(dbc, &dbkey.dbt->dbt, &dbdata.dbt->dbt, flags);
if (err != DB_KEYEXIST) {
verify_return(jnienv, err, 0);
}
out1:
jdbt_unlock(&dbdata, jnienv);
out2:
jdbt_unlock(&dbkey, jnienv);
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 closed\n");
#else
COMPQUIET(jnienv, NULL);
COMPQUIET(jthis, NULL);
#endif
}
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