minix/kernel/system/do_endksig.c
2005-10-14 08:58:59 +00:00

40 lines
1.3 KiB
C

/* The kernel call that is implemented in this file:
* m_type: SYS_ENDKSIG
*
* The parameters for this kernel call are:
* m2_i1: SIG_PROC # process for which PM is done
*/
#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;
/* Get process pointer and verify that it had signals pending. If the
* process is already dead its flags will be reset.
*/
rp = proc_addr(m_ptr->SIG_PROC);
if (! (rp->p_rts_flags & SIG_PENDING)) return(EINVAL);
/* 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_enqueue(rp); /* ready if no flags */
return(OK);
}
#endif /* USE_ENDKSIG */