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94 lines
2.8 KiB
94 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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/* |
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* include/linux/eventpoll.h ( Efficient event polling implementation ) |
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* Copyright (C) 2001,...,2006 Davide Libenzi |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* Davide Libenzi <[email protected]> |
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* |
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*/ |
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#ifndef _UAPI_LINUX_EVENTPOLL_H |
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#define _UAPI_LINUX_EVENTPOLL_H |
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/* For O_CLOEXEC */ |
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#include <linux/fcntl.h> |
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#include <linux/types.h> |
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/* Flags for epoll_create1. */ |
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#define EPOLL_CLOEXEC O_CLOEXEC |
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/* Valid opcodes to issue to sys_epoll_ctl() */ |
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#define EPOLL_CTL_ADD 1 |
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#define EPOLL_CTL_DEL 2 |
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#define EPOLL_CTL_MOD 3 |
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/* Epoll event masks */ |
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#define EPOLLIN (__force __poll_t)0x00000001 |
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#define EPOLLPRI (__force __poll_t)0x00000002 |
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#define EPOLLOUT (__force __poll_t)0x00000004 |
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#define EPOLLERR (__force __poll_t)0x00000008 |
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#define EPOLLHUP (__force __poll_t)0x00000010 |
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#define EPOLLNVAL (__force __poll_t)0x00000020 |
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#define EPOLLRDNORM (__force __poll_t)0x00000040 |
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#define EPOLLRDBAND (__force __poll_t)0x00000080 |
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#define EPOLLWRNORM (__force __poll_t)0x00000100 |
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#define EPOLLWRBAND (__force __poll_t)0x00000200 |
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#define EPOLLMSG (__force __poll_t)0x00000400 |
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#define EPOLLRDHUP (__force __poll_t)0x00002000 |
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/* Set exclusive wakeup mode for the target file descriptor */ |
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#define EPOLLEXCLUSIVE ((__force __poll_t)(1U << 28)) |
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/* |
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* Request the handling of system wakeup events so as to prevent system suspends |
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* from happening while those events are being processed. |
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* |
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* Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be |
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* re-allowed until epoll_wait is called again after consuming the wakeup |
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* event(s). |
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* |
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* Requires CAP_BLOCK_SUSPEND |
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*/ |
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#define EPOLLWAKEUP ((__force __poll_t)(1U << 29)) |
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/* Set the One Shot behaviour for the target file descriptor */ |
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#define EPOLLONESHOT ((__force __poll_t)(1U << 30)) |
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/* Set the Edge Triggered behaviour for the target file descriptor */ |
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#define EPOLLET ((__force __poll_t)(1U << 31)) |
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/* |
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* On x86-64 make the 64bit structure have the same alignment as the |
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* 32bit structure. This makes 32bit emulation easier. |
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* |
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* UML/x86_64 needs the same packing as x86_64 |
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*/ |
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#ifdef __x86_64__ |
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#define EPOLL_PACKED __attribute__((packed)) |
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#else |
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#define EPOLL_PACKED |
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#endif |
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struct epoll_event { |
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__poll_t events; |
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__u64 data; |
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} EPOLL_PACKED; |
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#ifdef CONFIG_PM_SLEEP |
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static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) |
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{ |
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if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND)) |
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epev->events &= ~EPOLLWAKEUP; |
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} |
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#else |
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static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) |
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{ |
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epev->events &= ~EPOLLWAKEUP; |
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} |
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#endif |
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#endif /* _UAPI_LINUX_EVENTPOLL_H */
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