projects / apple / libplatform.git / blame
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|---|---|---|
| 442fbc9d A |
1 | /* |
| 2 | * Copyright (c) 2020 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 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. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 12 | * | |
| 13 | * The Original Code and all software distributed under the License are | |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 20 | * | |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | ||
| 24 | #include <TargetConditionals.h> | |
| 25 | ||
| 26 | #if TARGET_OS_OSX || TARGET_OS_DRIVERKIT | |
| 27 | ||
| 28 | /* | |
| 29 | * This file implements the following functions for the arm64 architecture. | |
| 30 | * | |
| 31 | * void OSAtomicFifoEnqueue( OSFifoQueueHead *__list, void *__new, | |
| 32 | * size_t __offset); | |
| 33 | * void* OSAtomicFifoDequeue( OSFifoQueueHead *__list, size_t __offset); | |
| 34 | * | |
| 35 | */ | |
| 36 | ||
| 37 | #include <stdio.h> | |
| 38 | #include <machine/cpu_capabilities.h> | |
| 39 | ||
| 40 | #include "libkern/OSAtomic.h" | |
| 41 | #include "../OSAtomicFifo.h" | |
| 42 | ||
| 43 | typedef void (OSAtomicFifoEnqueue_t)(OSFifoQueueHead *, void *, size_t); | |
| 44 | typedef void *(OSAtomicFifoDequeue_t)(OSFifoQueueHead *, size_t); | |
| 45 | ||
| 46 | void OSAtomicFifoEnqueue(OSFifoQueueHead *__list, void *__new, size_t __offset) | |
| 47 | { | |
| 48 | void *addr = commpage_pfz_base; | |
| 49 | addr += _COMM_PAGE_TEXT_ATOMIC_ENQUEUE; | |
| 50 | ||
| 51 | OSAtomicFifoEnqueue_t *OSAtomicFifoEnqueueInternal = SIGN_PFZ_FUNCTION_PTR(addr); | |
| 52 | ||
| 53 | return OSAtomicFifoEnqueueInternal(__list, __new, __offset); | |
| 54 | } | |
| 55 | ||
| 56 | void * OSAtomicFifoDequeue( OSFifoQueueHead *__list, size_t __offset) | |
| 57 | { | |
| 58 | void *addr = commpage_pfz_base; | |
| 59 | addr += _COMM_PAGE_TEXT_ATOMIC_DEQUEUE; | |
| 60 | ||
| 61 | OSAtomicFifoDequeue_t *OSAtomicFifoDequeueInternal = SIGN_PFZ_FUNCTION_PTR(addr); | |
| 62 | ||
| 63 | return OSAtomicFifoDequeueInternal(__list, __offset); | |
| 64 | } | |
| 65 | ||
| 66 | #endif |