2.11BSD#431 - /usr/ingres/source/lock.h

   1: /*
   2: **	Concurency structs and global variables
   3: */
   4: # define    M_SHARE     2
   5: # define    M_EXCL      1
   6: # define    T_CS        0
   7: # define    T_PAGE      1
   8: # define    T_REL       2
   9: # define    T_DB        3
  10: # define    A_RTN       1
  11: # define    A_SLP       2
  12: # define    A_RLS1      3
  13: # define    A_RLSA      4
  14: # define    A_ABT       5
  15: # define    KEYSIZE     12
  16: struct lockreq
  17: {
  18:     char    lract;          /* requested action
  19: 					 *	=1 request lock,err return
  20: 					 *	=2 request lock,sleep
  21: 					 *	=3 release lock
  22: 					 *	=release all locks for pid
  23: 					 */
  24:     char    lrtype;         /* type of lock:
  25: 					 *   =0, critical section lock
  26: 					 *   =1, page lock
  27: 					 *   =2, logical lock
  28: 					 *   =3, data base lock
  29: 					 */
  30:     char    lrmod;          /* mode of lock
  31: 					 *	=1 exclusive lock
  32: 					 *	=2 shared lock
  33: 					*/
  34:     char    lpad;           /* padding to align the key */
  35:                     /* key for the lock */
  36:     char    dbnode[4];      /* inode of data base */
  37:     char    lrel[4];        /* relation tid */
  38:     char    lpage[4];       /* page address		*/
  39: };
  40: 
  41: char    Acclock;            /* locks enabled flag */
  42: extern int  Alockdes;       /* file descriptor for lock device*/
  43: int Lockrel;            /* lock relations flag*/

Defined variables

Defined struct's

Defined macros

Usage of this include