| | 1 | /* |
| | 2 | * Copyright (c) 2010 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_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. 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. |
| | 14 | * |
| | 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 |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 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. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | |
| | 29 | #include <TargetConditionals.h> |
| | 30 | #include <stddef.h> |
| | 31 | #include <stdint.h> |
| | 32 | #include "tsd.h" |
| | 33 | |
| | 34 | /* |
| | 35 | * cerror takes the return value of the syscall, being non-zero, and |
| | 36 | * stores it in errno. It needs to return -1 to indicate failure but |
| | 37 | * 64-bit platforms need to ensure that possible 128-bit wide return |
| | 38 | * values are also properly set. |
| | 39 | */ |
| | 40 | #ifdef __LP64__ |
| | 41 | typedef unsigned __int128 cerror_return_t; |
| | 42 | #else |
| | 43 | typedef uint64_t cerror_return_t; |
| | 44 | #endif |
| | 45 | |
| | 46 | extern void _pthread_exit_if_canceled(int error); |
| | 47 | |
| | 48 | #undef errno |
| | 49 | int errno; |
| | 50 | |
| | 51 | int * |
| | 52 | __error(void) |
| | 53 | { |
| | 54 | void *ptr = _os_tsd_get_direct(__TSD_ERRNO); |
| | 55 | if (ptr != NULL) { |
| | 56 | return (int*)ptr; |
| | 57 | } |
| | 58 | return &errno; |
| | 59 | } |
| | 60 | |
| | 61 | __attribute__((noinline)) |
| | 62 | cerror_return_t |
| | 63 | cerror_nocancel(int err) |
| | 64 | { |
| | 65 | errno = err; |
| | 66 | int *tsderrno = (int*)_os_tsd_get_direct(__TSD_ERRNO); |
| | 67 | if (tsderrno) { |
| | 68 | *tsderrno = err; |
| | 69 | } |
| | 70 | return -1; |
| | 71 | } |
| | 72 | |
| | 73 | __attribute__((noinline)) |
| | 74 | cerror_return_t |
| | 75 | cerror(int err) |
| | 76 | { |
| | 77 | _pthread_exit_if_canceled(err); |
| | 78 | return cerror_nocancel(err); |
| | 79 | } |
projects / apple / xnu.git / blame_incremental