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/*
Copyright © Grame 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Grame Research Laboratory, 9, rue du Garet 69001 Lyon - France
grame@rd.grame.fr
*/
#ifndef __ipc__
#define __ipc__
#include <mach/mach_error.h>
#include <servers/bootstrap.h>
#include "internal.h"
#include "engine.h"
#include "libjack/local.h" /* JOQ: fix me */
/*
RPC without time out can put the jack server in a blocked state
(waiting for the client answer) when a client is killed. The
mach_msg function does not return any error in this case. Using
time out solve the problem but does not seems really satisfactory.
*/
#define WAIT 2500 /* in millisecond */
static inline int
jack_client_resume(jack_client_internal_t *client)
{
mach_msg_header_t *head = &client->message.header;
int err;
if (!client->running) {
err = mach_msg (head, MACH_RCV_MSG, 0, sizeof(client->message),
client->serverport, 0, MACH_PORT_NULL);
if (err) {
jack_error("jack_client_resume: priming receive error: %s\n",
mach_error_string(err));
return -1;
}
client->running = TRUE;
}else {
/* remote port is already the send-once he sent us */
head->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE, 0);
head->msgh_local_port = MACH_PORT_NULL;
head->msgh_size = sizeof(mach_msg_header_t);
err = mach_msg(head, (MACH_SEND_MSG|MACH_RCV_MSG|
MACH_SEND_TIMEOUT|MACH_RCV_TIMEOUT),
sizeof(*head), sizeof(client->message),
client->serverport, WAIT, MACH_PORT_NULL);
if (err) {
/*
switch(err) {
case MACH_SEND_TIMED_OUT:
jack_error("MACH_SEND_TIMED_OUT %s\n",
client->control->name);
break;
case MACH_RCV_TIMED_OUT:
jack_error("MACH_RCV_TIMED_OUT %s\n",
client->control->name);
break;
case MACH_SEND_INVALID_DEST:
jack_error("MACH_SEND_INVALID_DEST %s\n",
client->control->name);
break;
}
*/
jack_error("jack_client_resume: send error for %s\n",
mach_error_string(err));
return err;
}
}
return 0;
}
static inline int
jack_client_suspend(jack_client_t * client)
{
int err = 0;
mach_msg_header_t * head = &client->message.header;
head->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,
MACH_MSG_TYPE_MAKE_SEND_ONCE);
head->msgh_remote_port = client->serverport;
head->msgh_local_port = client->replyport;
head->msgh_size = sizeof(mach_msg_header_t);
err = mach_msg(head, MACH_SEND_MSG|MACH_RCV_MSG|MACH_SEND_TIMEOUT,
sizeof(mach_msg_header_t), sizeof(client->message),
client->replyport, WAIT, MACH_PORT_NULL);
if (err) {
jack_error("jack_client_suspend: RPC error: %s\n",
mach_error_string(err));
return -1;
}
return 0;
}
static inline void
allocate_mach_serverport(jack_engine_t * engine, jack_client_internal_t *client)
{
char buf[256];
snprintf(buf, 256, "JackMachPort_%d", engine->portnum);
if (mach_port_allocate(engine->servertask, MACH_PORT_RIGHT_RECEIVE,
&client->serverport)){
jack_error("allocate_mach_serverport: can't allocate mach port");
}
if (mach_port_insert_right(engine->servertask, client->serverport,
client->serverport, MACH_MSG_TYPE_MAKE_SEND)){
jack_error("allocate_mach_serverport: error inserting mach rights");
}
if (bootstrap_register(engine->bp, buf, client->serverport)){
jack_error("allocate_mach_serverport: can't check in mach port");
}
client->portnum = engine->portnum;
engine->portnum++;
}
static inline int
allocate_mach_clientport(jack_client_t * client, int portnum)
{
char buf[256];
snprintf(buf, 256, "JackMachPort_%d", portnum);
if (bootstrap_look_up(client->bp, buf, &client->serverport)){
jack_error ("allocate_mach_clientport: can't find mach server port");
return -1;
}
if (mach_port_allocate(client->clienttask, MACH_PORT_RIGHT_RECEIVE,
&client->replyport)){
jack_error("allocate_mach_clientport: can't allocate mach port");
return -1;
}
return 0;
}
#endif /* __ipc__ */
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