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-rw-r--r--db2/xa/xa_db.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/db2/xa/xa_db.c b/db2/xa/xa_db.c
new file mode 100644
index 0000000000..4aaaeff108
--- /dev/null
+++ b/db2/xa/xa_db.c
@@ -0,0 +1,308 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1998
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)xa_db.c	10.6 (Sleepycat) 12/19/98";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#endif
+
+#undef stat
+
+#include "db_int.h"
+#include "db_page.h"
+#include "xa.h"
+#include "xa_ext.h"
+#include "db_am.h"
+#include "db_ext.h"
+#include "common_ext.h"
+
+static int __xa_c_close __P((DBC *));
+static int __xa_c_del __P((DBC *, u_int32_t));
+static int __xa_c_get __P((DBC *, DBT *, DBT *, u_int32_t));
+static int __xa_c_put __P((DBC *, DBT *, DBT *, u_int32_t));
+static int __xa_close __P((DB *, u_int32_t));
+static int __xa_cursor __P((DB *, DB_TXN *, DBC **, u_int32_t));
+static int __xa_del __P((DB *, DB_TXN *, DBT *, u_int32_t));
+static int __xa_fd __P((DB *, int *));
+static int __xa_get __P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
+static int __xa_put __P((DB *, DB_TXN *, DBT *, DBT *, u_int32_t));
+static int __xa_stat __P((DB *, void *, void *(*)(size_t), u_int32_t));
+static int __xa_sync __P((DB *, u_int32_t));
+
+int
+db_xa_open(fname, type, flags, mode, dbinfo, dbpp)
+	const char *fname;
+	DBTYPE type;
+	u_int32_t flags;
+	int mode;
+	DB_INFO *dbinfo;
+	DB **dbpp;
+{
+	DB *dbp, *real_dbp;
+	DB_ENV *dbenv;
+	struct __rmname *rp;
+	int ret;
+
+	/*
+	 * First try to open up the underlying DB.
+	 *
+	 * !!!
+	 * The dbenv argument is taken from the global list of environments.
+	 * When the transaction manager called xa_start() (__db_xa_start()),
+	 * the "current" DB environment was moved to the start of the list.
+	 * However, if we were called in a tpsvrinit function (which is
+	 * entirely plausible), then it's possible that xa_open was called
+	 * (which simply recorded the name of the environment to open) and
+	 * this is the next call into DB.  In that case, we still have to
+	 * open the environment.
+	 *
+	 * The way that we know that xa_open and nothing else was called
+	 * is because the nameq is not NULL.
+	 */
+	if ((rp = TAILQ_FIRST(&DB_GLOBAL(db_nameq))) != NULL &&
+	    (ret = __db_rmid_to_env(rp->rmid, &dbenv, 1)) != 0)
+		return (ret);
+
+	dbenv = TAILQ_FIRST(&DB_GLOBAL(db_envq));
+	if ((ret = db_open(fname,
+	    type, flags, mode, dbenv, dbinfo, &real_dbp)) != 0)
+		return (ret);
+
+	/*
+	 * Allocate our own DB handle, and copy the exported fields and
+	 * function pointers into it.  The internal pointer references
+	 * the real underlying DB handle.
+	 */
+	if ((ret = __os_calloc(1, sizeof(DB), &dbp)) != 0) {
+		(void)real_dbp->close(real_dbp, 0);
+		return (ret);
+	}
+	dbp->type = real_dbp->type;
+	dbp->byteswapped = real_dbp->byteswapped;
+	dbp->dbenv = dbenv;
+	dbp->internal = real_dbp;
+	TAILQ_INIT(&dbp->active_queue);
+	TAILQ_INIT(&dbp->free_queue);
+	dbp->close = __xa_close;
+	dbp->cursor = __xa_cursor;
+	dbp->del = __xa_del;
+	dbp->fd = __xa_fd;
+	dbp->get = __xa_get;
+	dbp->join = real_dbp->join;
+	dbp->put = __xa_put;
+	dbp->stat = __xa_stat;
+	dbp->sync = __xa_sync;
+
+	*dbpp = dbp;
+	return (0);
+}
+
+static int
+__xa_close(dbp, flags)
+	DB *dbp;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+	DBC *dbc;
+	int ret;
+
+	/* Close any associated cursors. */
+	while ((dbc = TAILQ_FIRST(&dbp->active_queue)) != NULL)
+		(void)dbc->c_close(dbc);
+
+	/* Close the DB handle. */
+	real_dbp = (DB *)dbp->internal;
+	ret = real_dbp->close(real_dbp, flags);
+
+	__os_free(dbp, sizeof(DB));
+	return (ret);
+}
+
+static int
+__xa_cursor(dbp, txn, dbcp, flags)
+	DB *dbp;
+	DB_TXN *txn;
+	DBC **dbcp;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+	DBC *real_dbc, *dbc;
+	int ret;
+
+	real_dbp = (DB *)dbp->internal;
+	txn = dbp->dbenv->xa_txn;
+
+	if ((ret = real_dbp->cursor(real_dbp, txn, &real_dbc, flags)) != 0)
+		return (ret);
+
+	/*
+	 * Allocate our own DBC handle, and copy the exported fields and
+	 * function pointers into it.  The internal pointer references
+	 * the real underlying DBC handle.
+	 */
+	if ((ret = __os_calloc(1, sizeof(DBC), &dbc)) != 0) {
+		(void)real_dbc->c_close(real_dbc);
+		return (ret);
+	}
+	dbc->dbp = dbp;
+	dbc->c_close = __xa_c_close;
+	dbc->c_del = __xa_c_del;
+	dbc->c_get = __xa_c_get;
+	dbc->c_put = __xa_c_put;
+	dbc->internal = real_dbc;
+	TAILQ_INSERT_TAIL(&dbp->active_queue, dbc, links);
+
+	*dbcp = dbc;
+	return (0);
+}
+
+static int
+__xa_fd(dbp, fdp)
+	DB *dbp;
+	int *fdp;
+{
+	DB *real_dbp;
+
+	COMPQUIET(fdp, NULL);
+
+	real_dbp = (DB *)dbp->internal;
+	return (__db_eopnotsup(real_dbp->dbenv));
+}
+
+static int
+__xa_del(dbp, txn, key, flags)
+	DB *dbp;
+	DB_TXN *txn;
+	DBT *key;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+
+	real_dbp = (DB *)dbp->internal;
+	txn = dbp->dbenv->xa_txn;
+
+	return (real_dbp->del(real_dbp, txn, key, flags));
+}
+
+static int
+__xa_get(dbp, txn, key, data, flags)
+	DB *dbp;
+	DB_TXN *txn;
+	DBT *key;
+	DBT *data;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+
+	real_dbp = (DB *)dbp->internal;
+	txn = dbp->dbenv->xa_txn;
+
+	return (real_dbp->get(real_dbp, txn, key, data, flags));
+}
+
+static int
+__xa_put(dbp, txn, key, data, flags)
+	DB *dbp;
+	DB_TXN *txn;
+	DBT *key;
+	DBT *data;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+
+	real_dbp = (DB *)dbp->internal;
+	txn = dbp->dbenv->xa_txn;
+
+	return (real_dbp->put(real_dbp, txn, key, data, flags));
+}
+
+static int
+__xa_stat(dbp, spp, db_malloc, flags)
+	DB *dbp;
+	void *spp;
+	void *(*db_malloc) __P((size_t));
+	u_int32_t flags;
+{
+	DB *real_dbp;
+
+	real_dbp = (DB *)dbp->internal;
+	return (real_dbp->stat(real_dbp, spp, db_malloc, flags));
+}
+
+static int
+__xa_sync(dbp, flags)
+	DB *dbp;
+	u_int32_t flags;
+{
+	DB *real_dbp;
+
+	real_dbp = (DB *)dbp->internal;
+	return (real_dbp->sync(real_dbp, flags));
+}
+
+static int
+__xa_c_close(dbc)
+	DBC *dbc;
+{
+	DBC *real_dbc;
+	int ret;
+
+	real_dbc = (DBC *)dbc->internal;
+
+	ret = real_dbc->c_close(real_dbc);
+
+	TAILQ_REMOVE(&dbc->dbp->active_queue, dbc, links);
+	__os_free(dbc, sizeof(DBC));
+
+	return (ret);
+}
+
+static int
+__xa_c_del(dbc, flags)
+	DBC *dbc;
+	u_int32_t flags;
+{
+	DBC *real_dbc;
+
+	real_dbc = (DBC *)dbc->internal;
+	return (real_dbc->c_del(real_dbc, flags));
+}
+
+static int
+__xa_c_get(dbc, key, data, flags)
+	DBC *dbc;
+	DBT *key;
+	DBT *data;
+	u_int32_t flags;
+{
+	DBC *real_dbc;
+
+	real_dbc = (DBC *)dbc->internal;
+	return (real_dbc->c_get(real_dbc, key, data, flags));
+}
+
+static int
+__xa_c_put(dbc, key, data, flags)
+	DBC *dbc;
+	DBT *key;
+	DBT *data;
+	u_int32_t flags;
+{
+	DBC *real_dbc;
+
+	real_dbc = (DBC *)dbc->internal;
+	return (real_dbc->c_put(real_dbc, key, data, flags));
+}
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-12 14:23:44 +0000