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Implement signals.

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Note: This is an incompatible ABI change.
This commit is contained in:
Jonas 'Sortie' Termansen 2013-08-04 20:24:59 +02:00
parent 316ed84e60
commit 30cd318c17
64 changed files with 2188 additions and 1121 deletions
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23
kernel/user-timer.cpp
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@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
This file is part of Sortix.
@ -25,6 +25,7 @@
#include <sys/types.h>
#include <errno.h>
#include <limits.h>
#include <timespec.h>
#include <sortix/clock.h>
@ -138,7 +139,12 @@ static int sys_timer_getoverrun(timer_t timerid)
if ( !timer )
return -1;
// TODO: This is not fully kept track of yet.
if ( (size_t) INT_MAX < timer->num_overrun_events)
return INT_MAX;
// TODO: How does the caller reset the overrun count back to 0? Should we
// adopt the Linux semantics where it resets back to 0 after INT_MAX?
// How about signed overflow in the kernel and in the user process?
return 0;
}
@ -164,15 +170,14 @@ static void timer_callback(Clock* /*clock*/, Timer* timer, void* user)
Process* process = user_timer->process;
ScopedLock lock(&process->user_timers_lock);
size_t current_overrun = timer->num_overrun_events;
// TODO: This delivery facility is insufficient! sigevent is much more
// powerful than sending a simple old-school signal.
// TODO: If the last signal from last time is still being processed, we need
// to handle the sum of overrun. I'm not sure how to handle overrun
// properly, so we'll just pretend to user-space it never happens when
// it does and we do some of the bookkeeping.
(void) current_overrun;
process->DeliverSignal(user_timer->event.sigev_signo);
if ( !process->DeliverSignal(user_timer->event.sigev_signo) &&
errno == ESIGPENDING )
{
if ( timer->num_overrun_events < SIZE_MAX )
timer->num_overrun_events++;
}
}
static int sys_timer_settime(timer_t timerid, int flags,