diff options
Diffstat (limited to 'src/lib/libc/include/cancel.h')
| -rw-r--r-- | src/lib/libc/include/cancel.h | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/src/lib/libc/include/cancel.h b/src/lib/libc/include/cancel.h deleted file mode 100644 index c452bf3d4c..0000000000 --- a/src/lib/libc/include/cancel.h +++ /dev/null | |||
| @@ -1,78 +0,0 @@ | |||
| 1 | /* $OpenBSD: cancel.h,v 1.5 2017/09/05 02:40:54 guenther Exp $ */ | ||
| 2 | /* | ||
| 3 | * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org> | ||
| 4 | * | ||
| 5 | * Permission to use, copy, modify, and distribute this software for any | ||
| 6 | * purpose with or without fee is hereby granted, provided that the above | ||
| 7 | * copyright notice and this permission notice appear in all copies. | ||
| 8 | * | ||
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
| 16 | */ | ||
| 17 | |||
| 18 | #ifndef _CANCEL_H_ | ||
| 19 | #define _CANCEL_H_ | ||
| 20 | |||
| 21 | #include <tib.h> | ||
| 22 | #include "thread_private.h" | ||
| 23 | |||
| 24 | /* process a cancel request at a cancel point */ | ||
| 25 | __dead void _thread_canceled(void); | ||
| 26 | |||
| 27 | #ifdef __LIBC__ | ||
| 28 | PROTO_NORMAL(_thread_canceled); | ||
| 29 | #endif | ||
| 30 | |||
| 31 | #if defined(__LIBC__) && !defined(TCB_HAVE_MD_GET) | ||
| 32 | /* | ||
| 33 | * Override TIB_GET macro to use the caching callback | ||
| 34 | */ | ||
| 35 | #undef TIB_GET | ||
| 36 | #define TIB_GET() TCB_TO_TIB(_thread_cb.tc_tcb()) | ||
| 37 | #endif | ||
| 38 | |||
| 39 | #define PREP_CANCEL_POINT(tib) \ | ||
| 40 | int _cantcancel = (tib)->tib_cantcancel | ||
| 41 | |||
| 42 | #define ENTER_CANCEL_POINT_INNER(tib, can_cancel, delay) \ | ||
| 43 | if (_cantcancel == 0) { \ | ||
| 44 | (tib)->tib_cancel_point = (delay) ? \ | ||
| 45 | CANCEL_POINT_DELAYED : CANCEL_POINT; \ | ||
| 46 | if (can_cancel) { \ | ||
| 47 | __asm volatile("":::"memory"); \ | ||
| 48 | if (__predict_false((tib)->tib_canceled)) \ | ||
| 49 | _thread_canceled(); \ | ||
| 50 | } \ | ||
| 51 | } | ||
| 52 | |||
| 53 | #define LEAVE_CANCEL_POINT_INNER(tib, can_cancel) \ | ||
| 54 | if (_cantcancel == 0) { \ | ||
| 55 | (tib)->tib_cancel_point = 0; \ | ||
| 56 | if (can_cancel) { \ | ||
| 57 | __asm volatile("":::"memory"); \ | ||
| 58 | if (__predict_false((tib)->tib_canceled)) \ | ||
| 59 | _thread_canceled(); \ | ||
| 60 | } \ | ||
| 61 | } | ||
| 62 | |||
| 63 | /* | ||
| 64 | * Enter or leave a cancelation point, optionally processing pending | ||
| 65 | * cancelation requests. Note that ENTER_CANCEL_POINT opens a block | ||
| 66 | * and LEAVE_CANCEL_POINT must close that same block. | ||
| 67 | */ | ||
| 68 | #define ENTER_CANCEL_POINT(can_cancel) \ | ||
| 69 | { \ | ||
| 70 | struct tib *_tib = TIB_GET(); \ | ||
| 71 | PREP_CANCEL_POINT(_tib); \ | ||
| 72 | ENTER_CANCEL_POINT_INNER(_tib, can_cancel, 0) | ||
| 73 | |||
| 74 | #define LEAVE_CANCEL_POINT(can_cancel) \ | ||
| 75 | LEAVE_CANCEL_POINT_INNER(_tib, can_cancel); \ | ||
| 76 | } | ||
| 77 | |||
| 78 | #endif /* _CANCEL_H_ */ | ||