35 lines
938 B
C
35 lines
938 B
C
|
/* 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);
|
||
|
|
}
|
||
|
|
|