--- freem/src/global_bltin.h	2025/04/08 21:41:13	1.7
+++ freem/src/global_bltin.h	2025/04/11 16:23:18	1.12
@@ -1,5 +1,5 @@
 /*
- *   $Id: global_bltin.h,v 1.7 2025/04/08 21:41:13 snw Exp $
+ *   $Id: global_bltin.h,v 1.12 2025/04/11 16:23:18 snw Exp $
  *    built-in global handler header
  *
  *  
@@ -24,6 +24,21 @@
  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
  *
  *   $Log: global_bltin.h,v $
+ *   Revision 1.12  2025/04/11 16:23:18  snw
+ *   Avoid re-reading the same block consecutively when possible
+ *
+ *   Revision 1.11  2025/04/11 14:21:03  snw
+ *   Make all but one of the read/write calls in global_bltin use gbl_read_block or gbl_write_block
+ *
+ *   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
  *
@@ -63,7 +78,8 @@ 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;
 
@@ -77,11 +93,25 @@ typedef struct global_handle {
     int fd; /* file descriptor */
 
     global_header header;
-    long use_count; /* how many times has it been accessed? */
+   
     long age;
+    long last_read_time;
+    
     short opened;
     short locked;
     unsigned long last_block;
+    short have_cached_block;
+    unsigned long cached_block_num;
+    
+    char *last_block_accessed;
+    
+    unsigned long use_count; /* how many times has it been accessed? */
+    unsigned long read_ops;
+    unsigned long write_ops;
+    unsigned long memory_reads;
+    unsigned long splits;    
+    unsigned long cache_misses;
+    unsigned long cache_hits;
     
     short fast_path;
     
@@ -94,9 +124,12 @@ typedef struct global_handle {
 } 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);
@@ -107,6 +140,8 @@ extern int gbl_read_header(global_handle
 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 int gbl_write_block(global_handle *g, unsigned long blocknum, char *block);
 extern global_handle *gbl_handle(char *key);
 
 #endif