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/*
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory (CSL). All rights reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*/
/*
* File: ipc_target.c
*
* Implementation for common part of IPC ports and port sets
* representing a target of messages and migrating RPCs.
*/
#include "sched_prim.h"
#include "ipc_target.h"
void
ipc_target_init(struct ipc_target *ipt, mach_port_t name)
{
ipt->ipt_name = name;
ipc_mqueue_init(&ipt->ipt_messages);
#ifdef MIGRATING_THREADS
ipt->ipt_type = IPT_TYPE_MESSAGE_RPC;
ipt->ipt_acts = 0;
ipc_target_machine_init(ipt);
#endif
}
void
ipc_target_terminate(struct ipc_target *ipt)
{
}
#ifdef MIGRATING_THREADS
struct Act *
ipc_target_block(struct ipc_target *ipt)
{
struct Act *act;
ipt_lock(ipt);
while ((act = ipt->ipt_acts) == 0) {
/* XXX mp unsafe */
ipt->ipt_waiting = 1;
ipt_unlock(ipt);
thread_wait((int)&ipt->ipt_acts, FALSE);
ipt_lock(ipt);
}
ipt->ipt_acts = act->ipt_next;
ipt_unlock(ipt);
return act;
}
void
ipc_target_wakeup(struct ipc_target *ipt)
{
ipt_lock(ipt);
if (ipt->ipt_waiting) {
thread_wakeup((int)&ipt->ipt_acts);
ipt->ipt_waiting = 0;
}
ipt_unlock(ipt);
}
#endif /* MIGRATING_THREADS */
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