4.3BSD/usr/ingres/source/ctlmod/resetp.c

# include	"ctlmod.h"
# include	<ingres.h>
# include	<tree.h>
# include	<sccs.h>

SCCSID(@(#)resetp.c	8.2	12/8/85)

/*
**  RESETP -- reset parameters from call.
**
**	This must be called after an initp-setp-call sequence to
**	reclaim the memory gathered by the initp.  It can also be
**	used in an initp-setp sequence to clean up if an error is
**	found.
**
**	Parameters:
**		none.
**
**	Returns:
**		none.
**
**	Side Effects:
**		Restores the old context.
**		Reclaims space from Qbuf.
**
**	Trace Flags:
**		4.4 - 4.7
*/

resetp()
{
	extern char	*Proc_name;

# ifdef xCTR1
	if (tTf(4, 4))
		printf("resetp: ctx_new=%d _init=%d _link=%x _pmark=%d _cmark=%d\n",
		    Ctx.ctx_new, Ctx.ctx_init, Ctx.ctx_link, Ctx.ctx_pmark,
		    Ctx.ctx_cmark);
# endif

	/* don't do anything if no matching "initp" call */
	if (!Ctx.ctx_new)
		return;

	/* If the Current Qt header matches the new context clean things up */
	if ((char *)Ctx.ctx_link == Qt.qt_ctx)
		Qt.qt_ctx = NULL;

	/*
	**	The 'freebuf' to ctx_cmark will also deallocate
	**	any parameters, since ctx_pmark >= ctx_cmark
	**	always.
	*/

	if (Ctx.ctx_link != NULL)
		bmove((char *) Ctx.ctx_link, (char *) &Ctx, Ctx.ctx_size);
# ifdef xCM_DEBUG
	if (Ctx.ctx_pmark < Ctx.ctx_cmark)
		syserr("resetp: pmark %d cmark %d", Ctx.ctx_pmark, Ctx.ctx_cmark);
# endif
	freebuf(Qbuf, Ctx.ctx_cmark);
	tT = Ctx.ctx_tvect;
	Proc_name = Ctx.ctx_name;
# ifdef xCTR1
	if (tTf(4, 5))
		lprintf("resetp: free %d\n", Ctx.ctx_cmark);
# endif

	/*
	**	If there was a Qt associated with this context,
	**	restore it also.  If not, but there was a Qt
	**	associated with the context we just deallocated,
	**	set Qt to be 'unallocated'.
	*/
	if (Ctx.ctx_qt != NULL)
	{
		/* first free any descriptors */
		clrrange();
		bmove((char *) Ctx.ctx_qt, (char *) &Qt, sizeof Qt);
		free(Ctx.ctx_qt);
		Ctx.ctx_qt = NULL;
	}
	else if (Qt.qt_ctx == NULL)
		Qt.qt_active = 0;
}