projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 6d2010ae A |
1 | /* |
| 2 | * Copyright (c) 2005, 2007 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 | #if defined(__LP64__) && (defined(VARIANT_CANCELABLE) || defined(VARIANT_PRE1050)) | |
| 25 | #undef __DARWIN_NON_CANCELABLE | |
| 26 | #define __DARWIN_NON_CANCELABLE 0 | |
| 27 | #endif /* __LP64__ && (VARIANT_CANCELABLE || VARIANT_PRE1050) */ | |
| 28 | ||
| 29 | #include <sys/select.h> | |
| 30 | #include "_errno.h" | |
| 31 | ||
| 32 | #if defined(VARIANT_CANCELABLE) || defined(VARIANT_PRE1050) | |
| 33 | extern int __select(int, fd_set * __restrict, fd_set * __restrict, | |
| 34 | fd_set * __restrict, struct timeval * __restrict); | |
| 35 | #else /* !VARIANT_CANCELABLE && !VARIANT_PRE1050 */ | |
| 36 | int __select_nocancel(int, fd_set * __restrict, fd_set * __restrict, | |
| 37 | fd_set * __restrict, struct timeval * __restrict); | |
| 38 | #endif /* VARIANT_CANCELABLE || VARIANT_PRE1050 */ | |
| 39 | ||
| 40 | /* | |
| 41 | * select stub, return error if nfds > FD_SETSIZE | |
| 42 | * add pthread cancelability | |
| 43 | * mandated for conformance. | |
| 44 | * | |
| 45 | * This is only for (non DARWINEXTSN) UNIX03 (both cancelable and | |
| 46 | * non-cancelable) and for legacy | |
| 47 | */ | |
| 48 | int | |
| 49 | select(int nfds, fd_set * __restrict readfds, fd_set * __restrict writefds, | |
| 50 | fd_set * __restrict exceptfds, struct timeval * __restrict | |
| 51 | #if defined(VARIANT_LEGACY) || defined(VARIANT_PRE1050) | |
| 52 | intimeout | |
| 53 | #else /* !VARIANT_LEGACY && !VARIANT_PRE1050 */ | |
| 54 | timeout | |
| 55 | #endif /* VARIANT_LEGACY || VARIANT_PRE1050 */ | |
| 56 | ) | |
| 57 | { | |
| 58 | ||
| 59 | #if defined(VARIANT_LEGACY) || defined(VARIANT_PRE1050) | |
| 60 | struct timeval tb, *timeout; | |
| 61 | ||
| 62 | /* | |
| 63 | * Legacy select behavior is minimum 10 msec when tv_usec is non-zero | |
| 64 | */ | |
| 65 | if (intimeout && intimeout->tv_sec == 0 && intimeout->tv_usec > 0 && intimeout->tv_usec < 10000) { | |
| 66 | tb.tv_sec = 0; | |
| 67 | tb.tv_usec = 10000; | |
| 68 | timeout = &tb; | |
| 69 | } else | |
| 70 | timeout = intimeout; | |
| 71 | #else /* !VARIANT_LEGACY && !VARIANT_PRE1050 */ | |
| 72 | if (nfds > FD_SETSIZE) { | |
| 73 | errno = EINVAL; | |
| 74 | return -1; | |
| 75 | } | |
| 76 | #endif /* VARIANT_LEGACY || VARIANT_PRE1050 */ | |
| 77 | #if defined(VARIANT_CANCELABLE) || defined(VARIANT_PRE1050) | |
| 78 | return __select(nfds, readfds, writefds, exceptfds, timeout); | |
| 79 | #else /* !VARIANT_CANCELABLE && !VARIANT_PRE1050 */ | |
| 80 | return __select_nocancel(nfds, readfds, writefds, exceptfds, timeout); | |
| 81 | #endif /* VARIANT_CANCELABLE || VARIANT_PRE1050 */ | |
| 82 | } |