/* The system call that is implemented in this file:
 *     SYS_SIGCTL	# signal handling functionality 
 *
 * The parameters and types for this system call are:
 *     SIG_REQUEST 	# request to perform			(long)
 *     SIG_PROC  	# process to signal/ pending		(int)
 *     SIG_CTXT_PTR 	# pointer to sigcontext structure	(pointer)	
 *     SIG_FLAGS    	# flags for S_SIGRETURN call		(int)	
 *     SIG_MAP		# bit map with pending signals		(long)	
 *     SIG_NUMBER	# signal number to send to process	(int)	
 *
 * Supported request types are in the parameter SIG_REQUEST:
 *     S_GETSIG		# get a pending kernel signal
 *     S_ENDSIG		# signal has been processed 
 *     S_SENDSIG	# deliver a POSIX-style signal 
 *     S_SIGRETURN	# return from a POSIX-style signal 
 *     S_KILL		# send a signal to a process 
 */

#include "../system.h"
#include <signal.h>
#include <sys/sigcontext.h>

#if USE_ENDKSIG 

/*===========================================================================*
 *			      do_endksig				     *
 *===========================================================================*/
PUBLIC int do_endksig(m_ptr)
message *m_ptr;			/* pointer to request message */
{
/* Finish up after a kernel type signal, caused by a SYS_KILL message or a 
 * call to cause_sig by a task. This is called by the PM after processing a
 * signal it got with SYS_GETKSIG.
 */
  register struct proc *rp;

  rp = proc_addr(m_ptr->SIG_PROC);
  if (isemptyp(rp)) return(EINVAL);		/* process already dead? */

  /* PM has finished one kernel signal. Perhaps process is ready now? */
  if (! (rp->p_rts_flags & SIGNALED)) 		/* new signal arrived */
     if ((rp->p_rts_flags &= ~SIG_PENDING)==0)	/* remove pending flag */
         lock_ready(rp);			/* ready if no flags */
  return(OK);
}

#endif /* USE_ENDKSIG */