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- /*
- * Mach Operating System
- * Copyright (c) 1991,1990 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: __msg_dest.c,v $
- * Revision 1.2 1993/08/03 06:13:18 roland
- * entered into RCS
- *
- * Revision 2.4 91/05/14 17:53:15 mrt
- * Correcting copyright
- *
- * Revision 2.3 91/02/14 14:17:43 mrt
- * Added new Mach copyright
- * [91/02/13 12:44:15 mrt]
- *
- * Revision 2.2 90/08/06 17:24:22 rpd
- * Created.
- *
- */
-
- #if 1
- #include <mach.h>
- #else
- /* This is what CMU did, but that fails to declare some used functions. */
- #include <mach/port.h>
- #include <mach/message.h>
- #include <mach_init.h>
- #endif
-
- static void mach_msg_destroy_port();
- static void mach_msg_destroy_memory();
-
- /*
- * Routine: mach_msg_destroy
- * Purpose:
- * Deallocates all port rights and out-of-line memory
- * found in a received message.
- */
-
- void
- __mach_msg_destroy(msg)
- mach_msg_header_t *msg;
- {
- mach_msg_bits_t mbits = msg->msgh_bits;
-
- /*
- * The msgh_local_port field doesn't hold a port right.
- * The receive operation consumes the destination port right.
- */
-
- mach_msg_destroy_port(msg->msgh_remote_port, MACH_MSGH_BITS_REMOTE(mbits));
-
- if (mbits & MACH_MSGH_BITS_COMPLEX) {
- vm_offset_t saddr;
- vm_offset_t eaddr;
-
- saddr = (vm_offset_t) (msg + 1);
- eaddr = (vm_offset_t) msg + msg->msgh_size;
-
- while (saddr < eaddr) {
- mach_msg_type_long_t *type;
- mach_msg_type_name_t name;
- mach_msg_type_size_t size;
- mach_msg_type_number_t number;
- boolean_t is_inline;
- vm_size_t length;
- vm_offset_t addr;
-
- type = (mach_msg_type_long_t *) saddr;
- is_inline = type->msgtl_header.msgt_inline;
- if (type->msgtl_header.msgt_longform) {
- name = type->msgtl_name;
- size = type->msgtl_size;
- number = type->msgtl_number;
- saddr += sizeof(mach_msg_type_long_t);
- } else {
- name = type->msgtl_header.msgt_name;
- size = type->msgtl_header.msgt_size;
- number = type->msgtl_header.msgt_number;
- saddr += sizeof(mach_msg_type_t);
- }
-
- /* calculate length of data in bytes, rounding up */
- length = ((((number * size) + 7) >> 3) + 3) &~ 3;
-
- addr = is_inline ? saddr : * (vm_offset_t *) saddr;
-
- if (MACH_MSG_TYPE_PORT_ANY(name)) {
- mach_port_t *ports = (mach_port_t *) addr;
- mach_msg_type_number_t i;
-
- for (i = 0; i < number; i++)
- mach_msg_destroy_port(*ports++, name);
- }
-
- if (is_inline) {
- /* inline data sizes round up to int boundaries */
- saddr += length;
- } else {
- mach_msg_destroy_memory(addr, length);
- saddr += sizeof(vm_offset_t);
- }
- }
- }
- }
-
- static void
- mach_msg_destroy_port(port, type)
- mach_port_t port;
- mach_msg_type_name_t type;
- {
- if (MACH_PORT_VALID(port)) switch (type) {
- case MACH_MSG_TYPE_PORT_SEND:
- case MACH_MSG_TYPE_PORT_SEND_ONCE:
- (void) __mach_port_deallocate(__mach_task_self(), port);
- break;
-
- case MACH_MSG_TYPE_PORT_RECEIVE:
- (void) __mach_port_mod_refs(__mach_task_self(), port,
- MACH_PORT_RIGHT_RECEIVE, -1);
- break;
- }
- }
-
- static void
- mach_msg_destroy_memory(addr, size)
- vm_offset_t addr;
- vm_size_t size;
- {
- if (size > 0)
- (void) __vm_deallocate(__mach_task_self(), addr, size);
- }
-