projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b | 1 | /* |
| 2d21ac55 | 2 | * Copyright (c) 2000-2007 Apple Inc. All rights reserved. |
| 1c79356b | 3 | * |
| 2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| 1c79356b | 5 | * |
| 2d21ac55 A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 8f6c56a5 | 14 | * |
| 2d21ac55 A |
15 | * Please obtain a copy of the License at |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 2d21ac55 A |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 8f6c56a5 | 25 | * |
| 2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 1c79356b A |
27 | */ |
| 28 | /* | |
| 29 | * @OSF_COPYRIGHT@ | |
| 30 | * | |
| 31 | */ | |
| 32 | /* | |
| 33 | * File: kern/sync_sema.h | |
| 34 | * Author: Joseph CaraDonna | |
| 35 | * | |
| 36 | * Contains RT distributed semaphore synchronization service definitions. | |
| 37 | */ | |
| 38 | ||
| 39 | #ifndef _KERN_SYNC_SEMA_H_ | |
| 40 | #define _KERN_SYNC_SEMA_H_ | |
| 41 | ||
| 42 | #include <kern/kern_types.h> | |
| 43 | #include <mach/sync_policy.h> | |
| 44 | ||
| 45 | #ifdef MACH_KERNEL_PRIVATE | |
| 46 | ||
| 47 | #include <kern/queue.h> | |
| 48 | #include <kern/lock.h> | |
| 49 | #include <kern/wait_queue.h> | |
| 50 | ||
| 51 | typedef struct semaphore { | |
| 52 | queue_chain_t task_link; /* chain of semaphores owned by a task */ | |
| 53 | struct wait_queue wait_queue; /* queue of blocked threads & lock */ | |
| 54 | task_t owner; /* task that owns semaphore */ | |
| 55 | ipc_port_t port; /* semaphore port */ | |
| 56 | int ref_count; /* reference count */ | |
| 57 | int count; /* current count value */ | |
| 58 | boolean_t active; /* active status */ | |
| 59 | } Semaphore; | |
| 60 | ||
| 61 | #define semaphore_lock(semaphore) wait_queue_lock(&(semaphore)->wait_queue) | |
| 62 | #define semaphore_unlock(semaphore) wait_queue_unlock(&(semaphore)->wait_queue) | |
| 63 | ||
| 2d21ac55 | 64 | extern void semaphore_init(void) __attribute__((section("__TEXT, initcode"))); |
| 1c79356b A |
65 | |
| 66 | extern void semaphore_reference (semaphore_t semaphore); | |
| 67 | extern void semaphore_dereference (semaphore_t semaphore); | |
| 68 | ||
| 69 | #endif /* MACH_KERNEL_PRIVATE */ | |
| 70 | ||
| 71 | #endif /* _KERN_SYNC_SEMA_H_ */ |