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Diffstat (limited to 'REORG.TODO/mach/msg.c')
| -rw-r--r-- | REORG.TODO/mach/msg.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/REORG.TODO/mach/msg.c b/REORG.TODO/mach/msg.c new file mode 100644 index 0000000000..bccad7fd26 --- /dev/null +++ b/REORG.TODO/mach/msg.c @@ -0,0 +1,145 @@ +/* + * 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) |