2.11BSD#431 - /usr/ingres/source/iutil/dblocks.c

   1: # include   "../ingres.h"
   2: # include   "../lock.h"
   3: struct  lockreq Lock;
   4: /*
   5:  *	setdbl - set data base lock for either exclusive or shared
   6:  *		 access.
   7:  */
   8: setdbl(act, mod)
   9: char    act;            /* type request */
  10: char    mod;            /* mod of lock: = 1 for exclusive, = 2 for shared*/
  11: {
  12:     register char   *r;
  13:     register int    i;
  14: 
  15: #	ifdef xATR1
  16:     if (tTf(98, 6))
  17:         printf(" setdbl a=%o m = %o\n", act, mod);
  18: #	endif
  19:     if (Alockdes < 0)
  20:         return (1);
  21:     Lock.lract = act;       /* type of request */
  22:     Lock.lrtype = T_DB;     /* data base lock */
  23:     Lock.lrmod = mod;       /* exclusive or shared */
  24:                     /* zero out rest of key */
  25:     r = Lock.lrel;
  26:     for (i = 0; i < 8; i++)
  27:         *r++ = 0;
  28:     i = write(Alockdes, &Lock, sizeof(struct lockreq));
  29:     return (i);
  30: }
  31: /*
  32:  *	unldb	- release the data base lock
  33:  */
  34: unldb()
  35: {
  36:     register char   *r;
  37:     register int    i;
  38: 
  39: #	ifdef xATR1
  40:     if (tTf(98, 7))
  41:         printf(" unldb \n");
  42: #	endif
  43:     if (Alockdes < 0)
  44:         return (1);
  45:     Lock.lract = A_RLS1;        /* release 1 lock */
  46:     Lock.lrtype = T_DB;     /* a data base lock*/
  47:     r = Lock.lrel;
  48:     for (i = 0; i < 8; i++)     /* zero out part of key*/
  49:         *r++ = 0;
  50:     i = write(Alockdes, &Lock, sizeof(struct lockreq));
  51:     return (i);
  52: }

Defined functions

Defined variables