| /* |
| * Mach Operating System |
| * Copyright (c) 1991,1990,1989 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. |
| */ |
| /* |
| * HISTORY |
| * $Log:mach_msg.c,v $ |
| * Revision 2.3 92/01/23 15:22:17 rpd |
| * Fixed to not pass MACH_SEND_INTERRUPT and MACH_RCV_INTERRUPT |
| * to the kernel. |
| * [92/01/20 rpd] |
| * |
| * Revision 2.2 92/01/15 17:17:13 rpd |
| * Created from msg.c. |
| * [92/01/15 rpd] |
| * |
| */ |
| |
| #if defined(VGO_darwin) |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_mach.h" |
| |
| #include <mach/port.h> |
| #include <mach/message.h> |
| |
| #define LIBMACH_OPTIONS (MACH_SEND_INTERRUPT|MACH_RCV_INTERRUPT) |
| |
| extern 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); |
| |
| mach_msg_return_t |
| mach_msg(msg, option, send_size, rcv_size, rcv_name, timeout, notify) |
| 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 mr; |
| |
| /* |
| * 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. |
| * |
| * We refrain from passing the option bits that we implement |
| * to the kernel. This prevents their presence from inhibiting |
| * the kernel's fast paths (when it checks the option value). |
| */ |
| |
| mr = mach_msg_trap(msg, option &~ LIBMACH_OPTIONS, |
| send_size, rcv_size, rcv_name, |
| timeout, notify); |
| if (mr == MACH_MSG_SUCCESS) |
| return MACH_MSG_SUCCESS; |
| |
| if ((option & MACH_SEND_INTERRUPT) == 0) |
| while (mr == MACH_SEND_INTERRUPTED) |
| mr = mach_msg_trap(msg, |
| option &~ LIBMACH_OPTIONS, |
| send_size, rcv_size, rcv_name, |
| timeout, notify); |
| |
| if ((option & MACH_RCV_INTERRUPT) == 0) |
| while (mr == MACH_RCV_INTERRUPTED) |
| mr = mach_msg_trap(msg, |
| option &~ (LIBMACH_OPTIONS|MACH_SEND_MSG), |
| 0, rcv_size, rcv_name, |
| timeout, notify); |
| |
| return mr; |
| } |
| |
| #endif // defined(VGO_darwin) |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |
