/* mark.c - _mkinit, mark */
#include
#include
#include
#ifdef MEMMARK
int *marks[MAXMARK];
int nmarks;
int mkmutex;
/*------------------------------------------------------------------------
* _mkinit -- called once at system startup
*------------------------------------------------------------------------
*/
_mkinit()
{
mkmutex = screate(1);
nmarks = 0;
}
/*------------------------------------------------------------------------
* mark -- mark a location if it hasn't been marked
*------------------------------------------------------------------------
*/
mark(loc)
int *loc;
{
if ( *loc>=0 && *loc return(0);
if (nmarks>=MAXMARK)
return(SYSERR);
wait(mkmutex);
marks[ (*loc) = nmarks++] = loc;
signal(mkmutex);
return(OK);
}
#endif
