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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/uapi/linux/eventpoll.h
Initial import
Diffstat (limited to 'include/uapi/linux/eventpoll.h')
-rw-r--r--include/uapi/linux/eventpoll.h76
1 files changed, 76 insertions, 0 deletions
diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
new file mode 100644
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+++ b/include/uapi/linux/eventpoll.h
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+/*
+ * include/linux/eventpoll.h ( Efficient event polling implementation )
+ * Copyright (C) 2001,...,2006 Davide Libenzi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Davide Libenzi <davidel@xmailserver.org>
+ *
+ */
+
+#ifndef _UAPI_LINUX_EVENTPOLL_H
+#define _UAPI_LINUX_EVENTPOLL_H
+
+/* For O_CLOEXEC */
+#include <linux/fcntl.h>
+#include <linux/types.h>
+
+/* Flags for epoll_create1. */
+#define EPOLL_CLOEXEC O_CLOEXEC
+
+/* Valid opcodes to issue to sys_epoll_ctl() */
+#define EPOLL_CTL_ADD 1
+#define EPOLL_CTL_DEL 2
+#define EPOLL_CTL_MOD 3
+
+/*
+ * Request the handling of system wakeup events so as to prevent system suspends
+ * from happening while those events are being processed.
+ *
+ * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be
+ * re-allowed until epoll_wait is called again after consuming the wakeup
+ * event(s).
+ *
+ * Requires CAP_BLOCK_SUSPEND
+ */
+#define EPOLLWAKEUP (1 << 29)
+
+/* Set the One Shot behaviour for the target file descriptor */
+#define EPOLLONESHOT (1 << 30)
+
+/* Set the Edge Triggered behaviour for the target file descriptor */
+#define EPOLLET (1 << 31)
+
+/*
+ * On x86-64 make the 64bit structure have the same alignment as the
+ * 32bit structure. This makes 32bit emulation easier.
+ *
+ * UML/x86_64 needs the same packing as x86_64
+ */
+#ifdef __x86_64__
+#define EPOLL_PACKED __attribute__((packed))
+#else
+#define EPOLL_PACKED
+#endif
+
+struct epoll_event {
+ __u32 events;
+ __u64 data;
+} EPOLL_PACKED;
+
+#ifdef CONFIG_PM_SLEEP
+static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
+{
+ if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND))
+ epev->events &= ~EPOLLWAKEUP;
+}
+#else
+static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
+{
+ epev->events &= ~EPOLLWAKEUP;
+}
+#endif
+#endif /* _UAPI_LINUX_EVENTPOLL_H */