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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989, 1995 Carnegie Mellon University
* 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.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach/port.h>
#include <mach/message.h>
#ifdef MACH_MSG_OVERWRITE
/* In variants with this feature, the actual system call is
__mach_msg_overwrite_trap. */
mach_msg_return_t
__mach_msg_trap (mach_msg_header_t *msg,
mach_msg_option_t option,
mach_msg_size_t send_size,
mach_msg_size_t rcv_size,
mach_port_t rcv_name,
mach_msg_timeout_t timeout,
mach_port_t notify)
{
return __mach_msg_overwrite_trap (msg, option, send_size,
rcv_size, rcv_name, timeout, notify,
MACH_MSG_NULL, 0);
}
weak_alias (__mach_msg_trap, mach_msg_trap)
/* See comments below in __mach_msg. */
mach_msg_return_t
__mach_msg_overwrite (mach_msg_header_t *msg,
mach_msg_option_t option,
mach_msg_size_t send_size,
mach_msg_size_t rcv_size,
mach_port_t rcv_name,
mach_msg_timeout_t timeout,
mach_port_t notify,
mach_msg_header_t *rcv_msg,
mach_msg_size_t rcv_msg_size)
{
mach_msg_return_t ret;
/* Consider the following cases:
1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED
plus special bits).
2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options.
3. RPC calls with interruptions in one/both halves.
*/
ret = __mach_msg_overwrite_trap (msg, option, send_size,
rcv_size, rcv_name, timeout, notify,
rcv_msg, rcv_msg_size);
if (ret == MACH_MSG_SUCCESS)
return MACH_MSG_SUCCESS;
if (!(option & MACH_SEND_INTERRUPT))
while (ret == MACH_SEND_INTERRUPTED)
ret = __mach_msg_overwrite_trap (msg, option, send_size,
rcv_size, rcv_name, timeout, notify,
rcv_msg, rcv_msg_size);
if (!(option & MACH_RCV_INTERRUPT))
while (ret == MACH_RCV_INTERRUPTED)
ret = __mach_msg_overwrite_trap (msg, option & ~MACH_SEND_MSG,
0, rcv_size, rcv_name, timeout, notify,
rcv_msg, rcv_msg_size);
return ret;
}
weak_alias (__mach_msg_overwrite, mach_msg_overwrite)
#endif
mach_msg_return_t
__mach_msg (mach_msg_header_t *msg,
mach_msg_option_t option,
mach_msg_size_t send_size,
mach_msg_size_t rcv_size,
mach_port_t rcv_name,
mach_msg_timeout_t timeout,
mach_port_t notify)
{
mach_msg_return_t ret;
/* Consider the following cases:
1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED
plus special bits).
2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options.
3. RPC calls with interruptions in one/both halves.
*/
ret = __mach_msg_trap (msg, option, send_size,
rcv_size, rcv_name, timeout, notify);
if (ret == MACH_MSG_SUCCESS)
return MACH_MSG_SUCCESS;
if (!(option & MACH_SEND_INTERRUPT))
while (ret == MACH_SEND_INTERRUPTED)
ret = __mach_msg_trap (msg, option, send_size,
rcv_size, rcv_name, timeout, notify);
if (!(option & MACH_RCV_INTERRUPT))
while (ret == MACH_RCV_INTERRUPTED)
ret = __mach_msg_trap (msg, option & ~MACH_SEND_MSG,
0, rcv_size, rcv_name, timeout, notify);
return ret;
}
weak_alias (__mach_msg, mach_msg)
mach_msg_return_t
__mach_msg_send (mach_msg_header_t *msg)
{
return __mach_msg (msg, MACH_SEND_MSG,
msg->msgh_size, 0, MACH_PORT_NULL,
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
}
weak_alias (__mach_msg_send, mach_msg_send)
mach_msg_return_t
__mach_msg_receive (mach_msg_header_t *msg)
{
return __mach_msg (msg, MACH_RCV_MSG,
0, msg->msgh_size, msg->msgh_local_port,
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
}
weak_alias (__mach_msg_receive, mach_msg_receive)
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