| 1 | /* Copyright (C) 2007-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #ifndef _SYS_EVENTFD_H |
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| 19 | #define _SYS_EVENTFD_H 1 |
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| 20 | |
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| 21 | #include <stdint.h> |
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| 22 | |
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| 23 | /* Get the platform-dependent flags. */ |
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| 24 | #include <bits/eventfd.h> |
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| 25 | |
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| 26 | /* Type for event counter. */ |
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| 27 | typedef uint64_t eventfd_t; |
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| 28 | |
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| 29 | |
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| 30 | __BEGIN_DECLS |
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| 31 | |
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| 32 | /* Return file descriptor for generic event channel. Set initial |
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| 33 | value to COUNT. */ |
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| 34 | extern int eventfd (unsigned int __count, int __flags) __THROW; |
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| 35 | |
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| 36 | /* Read event counter and possibly wait for events. */ |
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| 37 | extern int eventfd_read (int __fd, eventfd_t *__value); |
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| 38 | |
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| 39 | /* Increment event counter. */ |
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| 40 | extern int eventfd_write (int __fd, eventfd_t __value); |
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| 41 | |
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| 42 | __END_DECLS |
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| 43 | |
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| 44 | #endif /* sys/eventfd.h */ |
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| 45 | |
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