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Last change
on this file since 15 was 4, checked in by Mattia Monga, 14 years ago |
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Importazione sorgenti libro
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File size:
1.3 KB
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| [4] | 1 | /* The kernel call that is implemented in this file:
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| 2 | * m_type: SYS_ENDKSIG
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| 3 | *
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| 4 | * The parameters for this kernel call are:
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| 5 | * m2_i1: SIG_PROC # process for which PM is done
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| 6 | */
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| 7 |
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| 8 | #include "../system.h"
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| 9 | #include <signal.h>
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| 10 | #include <sys/sigcontext.h>
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| 11 |
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| 12 | #if USE_ENDKSIG
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| 13 |
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| 14 | /*===========================================================================*
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| 15 | * do_endksig *
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| 16 | *===========================================================================*/
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| 17 | PUBLIC int do_endksig(m_ptr)
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| 18 | message *m_ptr; /* pointer to request message */
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| 19 | {
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| 20 | /* Finish up after a kernel type signal, caused by a SYS_KILL message or a
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| 21 | * call to cause_sig by a task. This is called by the PM after processing a
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| 22 | * signal it got with SYS_GETKSIG.
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| 23 | */
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| 24 | register struct proc *rp;
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| 25 |
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| 26 | /* Get process pointer and verify that it had signals pending. If the
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| 27 | * process is already dead its flags will be reset.
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| 28 | */
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| 29 | rp = proc_addr(m_ptr->SIG_PROC);
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| 30 | if (! (rp->p_rts_flags & SIG_PENDING)) return(EINVAL);
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| 31 |
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| 32 | /* PM has finished one kernel signal. Perhaps process is ready now? */
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| 33 | if (! (rp->p_rts_flags & SIGNALED)) /* new signal arrived */
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| 34 | if ((rp->p_rts_flags &= ~SIG_PENDING)==0) /* remove pending flag */
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| 35 | lock_enqueue(rp); /* ready if no flags */
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| 36 | return(OK);
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| 37 | }
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| 38 |
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| 39 | #endif /* USE_ENDKSIG */
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| 40 |
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