minix/kernel/system/old/do_endsig.c

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2005-04-21 16:53:53 +02:00
/* The system call implemented in this file:
* m_type: SYS_ENDSIG
*
* The parameters for this system call are:
* m2_i1: SIG_PROC (process that was signaled)
*/
#include "../kernel.h"
#include "../system.h"
INIT_ASSERT
/*===========================================================================*
* do_endsig *
*===========================================================================*/
PUBLIC int do_endsig(m_ptr)
register message *m_ptr; /* pointer to request message */
{
/* Finish up after a KSIG-type signal, caused by a SYS_KILL message or a call
* to cause_sig by a task
*/
register struct proc *rp;
rp = proc_addr(m_ptr->SIG_PROC);
if (isemptyp(rp)) return(EINVAL); /* process already dead? */
assert(isuserp(rp));
/* MM has finished one KSIG. */
if (rp->p_pendcount != 0 && --rp->p_pendcount == 0
&& (rp->p_flags &= ~SIG_PENDING) == 0)
lock_ready(rp);
return(OK);
}