*
* Copyright 2004 Develer S.r.l. (http://www.develer.com/)
* Copyright 1999, 2000, 2001 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See README.devlib for information.
+ *
* -->
*
* \brief IPC signals implementation.
* \author Bernardo Innocenti <bernie@develer.com>
*/
-/*#*
- *#* $Log$
- *#* Revision 1.14 2006/07/19 12:56:27 bernie
- *#* Convert to new Doxygen style.
- *#*
- *#* Revision 1.13 2006/02/24 01:17:05 bernie
- *#* Update for new emulator.
- *#*
- *#* Revision 1.12 2005/11/04 16:20:02 bernie
- *#* Fix reference to README.devlib in header.
- *#*
- *#* Revision 1.11 2005/04/11 19:10:28 bernie
- *#* Include top-level headers from cfg/ subdir.
- *#*
- *#* Revision 1.10 2004/12/13 12:07:06 bernie
- *#* DISABLE_IRQSAVE/ENABLE_IRQRESTORE: Convert to IRQ_SAVE_DISABLE/IRQ_RESTORE.
- *#*
- *#* Revision 1.9 2004/12/08 08:57:35 bernie
- *#* Rename sigset_t to sigmask_t.
- *#*
- *#* Revision 1.8 2004/09/14 21:06:44 bernie
- *#* Use debug.h instead of kdebug.h.
- *#*
- *#* Revision 1.7 2004/08/25 14:12:09 rasky
- *#* Aggiornato il comment block dei log RCS
- *#*
- *#* Revision 1.6 2004/08/14 19:37:57 rasky
- *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
- *#*
- *#* Revision 1.5 2004/08/04 21:50:33 bernie
- *#* Add extensive documentation.
- *#*
- *#* Revision 1.4 2004/07/30 14:30:27 rasky
- *#* Resa la sig_signal interrupt safe (con il nuovo scheduler IRQ-safe)
- *#* Rimossa event_doIntr (ora inutile) e semplificata la logica delle macro con funzioni inline
- *#*
- *#* Revision 1.3 2004/07/30 14:24:16 rasky
- *#* Task switching con salvataggio perfetto stato di interrupt (SR)
- *#* Kernel monitor per dump informazioni su stack dei processi
- *#*
- *#* Revision 1.2 2004/06/03 11:27:09 bernie
- *#* Add dual-license information.
- *#*
- *#* Revision 1.1 2004/05/23 17:27:00 bernie
- *#* Import kern/ subdirectory.
- *#*
- *#*/
-
#include "signal.h"
+#include <cfg/debug.h>
+#include <drv/timer.h>
#include <kern/proc.h>
#include <kern/proc_p.h>
-#include <cfg/debug.h>
+
#if CONFIG_KERN_SIGNALS
/**
* Check if any of the signals in \a sigs has occurred and clear them.
- * Return the signals that have occurred.
+ * \return the signals that have occurred.
*/
sigmask_t sig_check(sigmask_t sigs)
{
/**
* Sleep until any of the signals in \a sigs occurs.
- * Return the signal(s) that have awaked the process.
+ * \return the signal(s) that have awoken the process.
*/
sigmask_t sig_wait(sigmask_t sigs)
{
return result;
}
+/**
+ * Sleep until any of the signals in \a sigs or \a timeout ticks elapse.
+ * If the timeout elapse a SIG_TIMEOUT is added to the received signal(s).
+ * \return the signal(s) that have awoken the process.
+ * \note Caller must check return value to check which signal awoke the process.
+ */
+sigmask_t sig_waitTimeout(sigmask_t sigs, ticks_t timeout)
+{
+ Timer t;
+ sigmask_t res;
+ cpuflags_t flags;
+
+ ASSERT(!sig_check(SIG_TIMEOUT));
+ ASSERT(!(sigs & SIG_TIMEOUT));
+ /* IRQ are needed to run timer */
+ ASSERT(IRQ_ENABLED());
+
+ timer_set_event_signal(&t, proc_current(), SIG_TIMEOUT);
+ timer_setDelay(&t, timeout);
+ timer_add(&t);
+ res = sig_wait(SIG_TIMEOUT | sigs);
+
+ IRQ_SAVE_DISABLE(flags);
+ /* Remove timer if sigs occur before timer signal */
+ if (!(res & SIG_TIMEOUT) && !sig_check(SIG_TIMEOUT))
+ timer_abort(&t);
+ IRQ_RESTORE(flags);
+ return res;
+}
+
/**
* Send the signals \a sigs to the process \a proc.
- * The process will be awaken if it was waiting for any of them.
+ * The process will be awoken if it was waiting for any of them.
*
* \note This call is interrupt safe.
*/
/* Set the signals */
proc->sig_recv |= sigs;
- /* Check if process needs to be awaken */
+ /* Check if process needs to be awoken */
if (proc->sig_recv & proc->sig_wait)
{
/* Wake up process and enqueue in ready list */