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 *
__error(void)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
cerror_nocancel(int err)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
cerror(int err)75 cerror(int err)
76 {
77 _pthread_exit_if_canceled(err);
78 return cerror_nocancel(err);
79 }
80