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Annotation of XNU/osfmk/kern/ipc_sync.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  * 
        !            25:  */
        !            26: 
        !            27: #include <kern/ipc_kobject.h>
        !            28: #include <kern/ipc_sync.h>
        !            29: #include <ipc/port.h>
        !            30: #include <ipc/ipc_space.h>
        !            31: #include <ipc/ipc_port.h>
        !            32: #include <mach/semaphore_server.h>
        !            33: #include <mach/lock_set_server.h>
        !            34: #include <mach/mach_port_server.h>
        !            35: #include <mach/port.h>
        !            36: 
        !            37: 
        !            38: semaphore_t
        !            39: convert_port_to_semaphore (ipc_port_t port)
        !            40: {
        !            41:        semaphore_t semaphore = SEMAPHORE_NULL;
        !            42: 
        !            43:        if (IP_VALID (port)) {
        !            44:                ip_lock(port);
        !            45:                if (ip_active(port) && (ip_kotype(port) == IKOT_SEMAPHORE)) {
        !            46:                        semaphore = (semaphore_t) port->ip_kobject;
        !            47:                        semaphore_reference(semaphore);
        !            48:                }
        !            49:                ip_unlock(port);
        !            50:        }
        !            51: 
        !            52:        return (semaphore);
        !            53: }
        !            54: 
        !            55: ipc_port_t
        !            56: convert_semaphore_to_port (semaphore_t semaphore)
        !            57: {
        !            58:        ipc_port_t port;
        !            59: 
        !            60:        if (semaphore != SEMAPHORE_NULL)
        !            61:                port = ipc_port_make_send(semaphore->port);
        !            62:        else
        !            63:                port = IP_NULL;
        !            64: 
        !            65:        return (port);
        !            66: }
        !            67: 
        !            68: lock_set_t
        !            69: convert_port_to_lock_set (ipc_port_t port)
        !            70: {
        !            71:        lock_set_t lock_set = LOCK_SET_NULL;
        !            72: 
        !            73:        if (IP_VALID (port)) {
        !            74:                ip_lock(port);
        !            75:                if (ip_active(port) && (ip_kotype(port) == IKOT_LOCK_SET)) {
        !            76:                        lock_set = (lock_set_t) port->ip_kobject;
        !            77:                        lock_set_reference(lock_set);
        !            78:                }
        !            79:                ip_unlock(port);
        !            80:        }
        !            81: 
        !            82:        return (lock_set);
        !            83: }
        !            84: 
        !            85: ipc_port_t
        !            86: convert_lock_set_to_port (lock_set_t lock_set)
        !            87: {
        !            88:        ipc_port_t port;
        !            89: 
        !            90:        if (lock_set != LOCK_SET_NULL)
        !            91:                port = ipc_port_make_send(lock_set->port);
        !            92:        else
        !            93:                port = IP_NULL;
        !            94: 
        !            95:        return (port);
        !            96: }
        !            97: 

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