Return to sync_sema.h CVS log

Up to [Apple XNU] / XNU / osfmk / kern

Annotation of XNU/osfmk/kern/sync_sema.h, 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:  *     File:   kern/sync_sema.h
        !            28:  *     Author: Joseph CaraDonna
        !            29:  *
        !            30:  *     Contains RT distributed semaphore synchronization service definitions.
        !            31:  */
        !            32: 
        !            33: #ifndef _KERN_SYNC_SEMA_H_
        !            34: #define _KERN_SYNC_SEMA_H_
        !            35: 
        !            36: #include <kern/kern_types.h>
        !            37: 
        !            38: #ifdef MACH_KERNEL_PRIVATE
        !            39: 
        !            40: #include <kern/queue.h>
        !            41: #include <kern/lock.h>
        !            42: #include <kern/wait_queue.h>
        !            43: 
        !            44: typedef struct semaphore {
        !            45:        queue_chain_t     task_link;  /* chain of semaphores owned by a task */
        !            46:        struct wait_queue wait_queue; /* queue of blocked threads & lock     */
        !            47:        task_t            owner;      /* task that owns semaphore            */
        !            48:        ipc_port_t        port;       /* semaphore port                      */
        !            49:        int               ref_count;  /* reference count                     */
        !            50:        int               count;      /* current count value                 */
        !            51:        boolean_t         active;     /* active status                       */
        !            52: } Semaphore;
        !            53: 
        !            54: 
        !            55: #endif /* MACH_KERNEL_PRIVATE */
        !            56: 
        !            57: /*
        !            58:  *     Forward Declarations
        !            59:  */
        !            60: extern kern_return_t   semaphore_create        (task_t task,
        !            61:                                                 semaphore_t *new_semaphore,
        !            62:                                                 int policy,
        !            63:                                                 int value);
        !            64: 
        !            65: extern kern_return_t   semaphore_destroy       (task_t task,
        !            66:                                                 semaphore_t semaphore);
        !            67: 
        !            68: extern void            semaphore_reference     (semaphore_t semaphore);
        !            69: extern void            semaphore_dereference   (semaphore_t semaphore);
        !            70: 
        !            71: extern kern_return_t   semaphore_signal        (semaphore_t semaphore);
        !            72: extern kern_return_t   semaphore_signal_all    (semaphore_t semaphore);
        !            73: extern kern_return_t   semaphore_signal_thread (semaphore_t semaphore,
        !            74:                                                 thread_act_t thread_act);
        !            75: extern kern_return_t   semaphore_wait          (semaphore_t semaphore);
        !            76: extern kern_return_t   semaphore_timedwait     (semaphore_t semaphore, 
        !            77:                                                 mach_timespec_t wait_time);
        !            78: 
        !            79: #endif /* _KERN_SYNC_SEMA_H_ */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.