minix/kernel/system/do_endksig.c
Tomas Hruby 4fd433694f proc_addr() returns address based on location in proc array
- pproc_addr is not neccessary to get the address of a process if we know its
  number

- local proc variables in system calls implementation (sys_task) conflicts with
  the global proc array of all process, therefore the variable were renamed to
  proc_nr as they hold the process number
2009-09-15 09:57:22 +00:00

43 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_ENDPT # 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;
int proc_nr;
/* Get process pointer and verify that it had signals pending. If the
* process is already dead its flags will be reset.
*/
if(!isokendpt(m_ptr->SIG_ENDPT, &proc_nr))
return EINVAL;
rp = proc_addr(proc_nr);
if (!RTS_ISSET(rp, SIG_PENDING)) return(EINVAL);
/* PM has finished one kernel signal. Perhaps process is ready now? */
if (!RTS_ISSET(rp, SIGNALED)) /* new signal arrived */
RTS_LOCK_UNSET(rp, SIG_PENDING); /* remove pending flag */
return(OK);
}
#endif /* USE_ENDKSIG */