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 } 80