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