--- freem/src/global_bltin.h	2025/03/09 15:20:18	1.2
+++ freem/src/global_bltin.h	2025/04/11 00:52:40	1.10
@@ -1,23 +1,11 @@
 /*
- *                            *
- *                           * *
- *                          *   *
- *                     ***************
- *                      * *       * *
- *                       *  MUMPS  *
- *                      * *       * *
- *                     ***************
- *                          *   *
- *                           * *
- *                            *
- *
- *   global_bltin.h
+ *   $Id: global_bltin.h,v 1.10 2025/04/11 00:52:40 snw Exp $
  *    built-in global handler header
  *
  *  
  *   Author: Serena Willis <snw@coherent-logic.com>
  *    Copyright (C) 1998 MUG Deutschland
- *    Copyright (C) 2020 Coherent Logic Development LLC
+ *    Copyright (C) 2020, 2025 Coherent Logic Development LLC
  *
  *
  *   This file is part of FreeM.
@@ -35,4 +23,111 @@
  *   You should have received a copy of the GNU Affero Public License
  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
  *
+ *   $Log: global_bltin.h,v $
+ *   Revision 1.10  2025/04/11 00:52:40  snw
+ *   Replace all lseek/read calls in global handler to use gbl_read_block function
+ *
+ *   Revision 1.9  2025/04/09 14:34:30  snw
+ *   Further work on global_bltin.c refactor
+ *
+ *   Revision 1.8  2025/04/09 00:43:07  snw
+ *   Exit with fatal error if a header mismatch found
+ *
+ *   Revision 1.7  2025/04/08 21:41:13  snw
+ *   Make insert, update, and splitp global handler functions take a ptr to a global_handle instead of a file descriptor
+ *
+ *   Revision 1.6  2025/04/08 20:00:56  snw
+ *   Global handler now uses a header file and maintains the last journaling transaction ID
+ *
+ *   Revision 1.5  2025/04/08 16:46:11  snw
+ *   Add global file header and offsets
+ *
+ *   Revision 1.4  2025/04/08 14:39:21  snw
+ *   Initial work on global handler refactor
+ *
+ *   Revision 1.3  2025/03/09 19:14:25  snw
+ *   First phase of REUSE compliance and header reformat
+ *
+ *
+ * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
+ * SPDX-License-Identifier: AGPL-3.0-or-later
  **/
+
+#if !defined(__FREEM_GLOBAL_BLTIN_H)
+# define __FREEM_GLOBAL_BLTIN_H
+
+#include "version.h"
+
+#define GBL_FORMAT_VERSION 2
+#define GBL_MAGIC "FRMGL"
+
+#define GBL_HDR_OK 0
+#define GBL_HDR_NOTOPEN 1
+#define GBL_HDR_BADMAGIC 2
+#define GBL_HDR_BADVERSION 3
+#define GBL_HDR_BADBLOCKSIZE 4
+
+typedef struct global_header {
+    
+    char magic[5]; /* FRMGL */
+    int format_version;
+    char host_triplet[40];
+    char host_id[256];
+    
+    unsigned long block_size;
+    unsigned long last_transaction_id;
+
+    long created;
+    long last_backup;
+    
+} global_header;
+
+typedef struct global_handle {
+
+    int fd; /* file descriptor */
+
+    global_header header;
+   
+    long age;
+    short opened;
+    short locked;
+    unsigned long last_block;
+    
+    unsigned long use_count; /* how many times has it been accessed? */
+    unsigned long read_ops;
+    unsigned long write_ops;
+    unsigned long splits;    
+    unsigned long cache_misses;
+    unsigned long cache_hits;
+    
+    short fast_path;
+    
+    char global_name[256];
+    char global_path[4096];
+
+    
+    struct global_handle *next;   
+    
+} global_handle;
+
+extern global_handle *global_handles_head;
+extern unsigned long gbl_cache_misses;
+extern unsigned long gbl_cache_hits;
+
+extern inline long gbl_path(char *key, char *buf);
+extern void gbl_cache_hit(global_handle *g);
+extern void gbl_cache_miss(global_handle *g);
+extern int gbl_lock(global_handle *g, int type);
+extern int gbl_unlock(global_handle *g);
+extern void gbl_close(global_handle *g);
+extern void gbl_close_all(void);
+extern int gbl_write_initial_header(global_handle *g);
+extern int gbl_write_header(global_handle *g, global_header *hdr);
+extern int gbl_read_header(global_handle *g, global_header *h);
+extern int gbl_update_tid(global_handle *g);
+extern int gbl_create(global_handle *g);
+extern short gbl_open(global_handle *g, short action);
+extern int gbl_read_block(global_handle *g, unsigned long blocknum, char *block);
+extern global_handle *gbl_handle(char *key);
+
+#endif