Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/api/transaction.C

@@ -0,0 +1,155 @@
+/*
+ * $XConsortium: transaction.C /main/5 1996/08/21 15:51:19 drk $
+ *
+ * Copyright (c) 1993 HAL Computer Systems International, Ltd.
+ * All rights reserved.  Unpublished -- rights reserved under
+ * the Copyright Laws of the United States.  USE OF A COPYRIGHT
+ * NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
+ * OR DISCLOSURE.
+ * 
+ * THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
+ * SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.  USE,
+ * DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
+ * PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
+ * INTERNATIONAL, LTD.
+ * 
+ *                         RESTRICTED RIGHTS LEGEND
+ * Use, duplication, or disclosure by the Government is subject
+ * to the restrictions as set forth in subparagraph (c)(l)(ii)
+ * of the Rights in Technical Data and Computer Software clause
+ * at DFARS 252.227-7013.
+ *
+ *          HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
+ *                  1315 Dell Avenue
+ *                  Campbell, CA  95008
+ * 
+ */
+
+
+#include "api/transaction.h"
+#include "dstr/bset.h"
+#include "mgrs/misc.h"
+
+transaction* g_transac = 0;
+
+//////////////////////////////////////
+// application functions
+//////////////////////////////////////
+inline void begin_trans(const void* x) 
+{
+   ((page_storage*)x) -> begin_trans();
+}
+
+inline void end_trans(const void* x) 
+{
+   ((page_storage*)x) -> commit_trans();
+}
+
+inline void roll_back(const void* x) 
+{
+   ((page_storage*)x) -> roll_back();
+}
+
+inline void psync(const void* x) 
+{
+   ((page_storage*)x) -> sync();
+}
+
+inline void commit_object(const void* x)
+{
+   name_oid_t *y = (name_oid_t*)x;
+
+   if (y==0)
+      throw(stringException("null pointer"));
+
+   handler z(y->v_oid, y->v_store);
+   z.commit();
+}
+
+inline void set_updated_false_f(const void* x)
+{
+   name_oid_t *y = (name_oid_t*)x;
+   if (y==0)
+      throw(stringException("null pointer"));
+   handler z(y->v_oid, y->v_store);
+   z -> set_mode(UPDATE, false);
+}
+
+//////////////////////////////////
+//
+//
+//////////////////////////////////
+transaction::transaction() :
+   v_store_array(), v_updated_objects(oid_storage_eq, oid_storage_ls)
+{
+}
+
+transaction::~transaction() 
+{
+}
+
+void transaction::book(abs_storage* x)
+{
+   if ( v_store_array.member(x) == 0 ) {
+      ((page_storage*)x) -> begin_trans();
+      v_store_array.insert(x);
+   }
+}
+
+void transaction::book(oid_t& id, abs_storage* x)
+{
+   char _dummy[1]; _dummy[0] = 0;
+   name_oid_t* y = new name_oid_t(_dummy, id, x);
+
+   if ( v_updated_objects.insert(y) == false )
+      delete y;
+
+   if ( v_store_array.member(x) == 0 ) {
+      debug(cerr, id);
+      debug(cerr, x -> my_path());
+      debug(cerr, x -> my_name());
+      throw(stringException("store is not in transaction mode"));
+   }
+}
+
+void transaction::begin()
+{
+   v_store_array.apply(begin_trans);
+   g_transac = this;
+//MESSAGE(cerr, "g_tr in transaction.C");
+//debug(cerr, int(g_transac));
+}
+
+void transaction::end()
+{
+//MESSAGE(cerr, "transaction::end()");
+
+   v_updated_objects.apply(commit_object);
+   v_store_array.apply(end_trans);
+
+   v_updated_objects.del_elements(delete_name_oid_rec_f);
+
+   g_transac = 0;
+//MESSAGE(cerr, "transaction::end() done");
+}
+
+void transaction::abort()
+{
+   v_updated_objects.del_elements(delete_name_oid_rec_f);
+   g_transac = 0;
+}
+
+void transaction::rollback()
+{
+   v_updated_objects.apply(set_updated_false_f);
+   v_store_array.apply(roll_back);
+}
+
+void transaction::sync()
+{
+   v_updated_objects.apply(commit_object);
+   v_store_array.apply(psync);
+
+   g_transac = 0;
+}
+