4.3BSD - /usr/ingres/source/iutil/rllocks.c

   1: # include   <ingres.h>
   2: # include   <lock.h>
   3: # include   <sccs.h>
   4: # include   <signal.h>
   5: 
   6: SCCSID(@(#)rllocks.c	8.1	12/31/84)
   7: 
   8: struct lockreq  Lock;
   9: /*
  10: /*
  11:  *	setrll- set a relation lock
  12:  */
  13: setrll(act, rtid, mod)
  14: char    act;
  15: long    rtid;
  16: char    mod;
  17: {
  18:     register char   *r;
  19:     register int    i;
  20:     auto    int ret_val;
  21: 
  22: #	ifdef xATR1
  23:     if ( tTf(28,4) )
  24:     {
  25:         printf(" setrll act=%d md=%o ", act, mod);
  26:         dumptid(&rtid);
  27:     }
  28: #	endif
  29:     if (Alockdes < 0)
  30:         return(1);
  31:     Lock.lract = act;   /* sleep (act = 2) or error return (act = 1)*/
  32:     Lock.lrtype = T_REL;    /* relation lock */
  33:     Lock.lrmod = mod;   /* exclusive (mod = 1) or shared (mod = 2)*/
  34:     bmove(&rtid, Lock.lrel, 4); /* copy relation id */
  35:     r = Lock.lpage;
  36: 
  37:     /* zero out page id */
  38:     for (i = 0; i < 4; i++)
  39:         *r++ = 0;
  40: 
  41:     write(Alockdes, &Lock, KEYSIZE+3);
  42:     read(Alockdes, &ret_val, sizeof (int));
  43:     return (ret_val);
  44: }
  45: /*
  46:  *	unlrel- unlock a relation lock
  47:  */
  48: unlrl(rtid)
  49: long    rtid;
  50: {
  51:     register char   *r;
  52:     register int    i;
  53:     auto    int ret_val;
  54: 
  55: #	ifdef xATR1
  56:     if (tTf(28, 5))
  57:     {
  58:         printf(" unlrl ");
  59:         dumptid(&rtid);
  60:     }
  61: #	endif
  62:     if (Alockdes < 0)
  63:         return (1);
  64:     Lock.lract = A_RLS1;
  65:     Lock.lrtype = T_REL;    /* relation lock */
  66:     bmove(&rtid, Lock.lrel, 4); /* copy relation id */
  67:     r = Lock.lpage;
  68:     for (i = 0; i < 4; i++)
  69:             /* zero out pageid */
  70:         *r++ = 0;
  71:     i = write(Alockdes, &Lock, KEYSIZE + 3);
  72:     read(Alockdes, &ret_val, sizeof (int));
  73:     return (ret_val);
  74: }

Defined functions

Defined variables