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authorMike Frysinger <vapier@gentoo.org>2005-01-06 03:06:49 +0000
committerMike Frysinger <vapier@gentoo.org>2005-01-06 03:06:49 +0000
commit7334cfc680d557f2385c98d1b2a4f114955d5049 (patch)
tree6438497754ef661a31e507a0e7faa03b23fdcee4 /include/sys/epoll.h
parenta7e14569d20ae3cd7baa220d1b4bbc8713b38d02 (diff)
Justin Cormack <justin@street-vision.com> writes:
Here is a small patch to add epoll support to uclibc. The only thing I am not sure about is what needs to be done (if anything) to make it work on 2.4/2.2 kernels (are the syscall numbers defined but give errors when called or not?). Tested on 2.6, though some other issues prevent more extensive testing at the minute. Mike Frysinger: cleaned up patch and added checks to make sure that the syscall actually exists, returning ENOSYS in cases where it doesn't.
Diffstat (limited to 'include/sys/epoll.h')
-rw-r--r--include/sys/epoll.h107
1 files changed, 107 insertions, 0 deletions
diff --git a/include/sys/epoll.h b/include/sys/epoll.h
new file mode 100644
index 000000000..cffddb58b
--- /dev/null
+++ b/include/sys/epoll.h
@@ -0,0 +1,107 @@
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SYS_EPOLL_H
+#define _SYS_EPOLL_H 1
+
+#include <stdint.h>
+#include <sys/types.h>
+
+
+enum EPOLL_EVENTS
+ {
+ EPOLLIN = 0x001,
+#define EPOLLIN EPOLLIN
+ EPOLLPRI = 0x002,
+#define EPOLLPRI EPOLLPRI
+ EPOLLOUT = 0x004,
+#define EPOLLOUT EPOLLOUT
+ EPOLLRDNORM = 0x040,
+#define EPOLLRDNORM EPOLLRDNORM
+ EPOLLRDBAND = 0x080,
+#define EPOLLRDBAND EPOLLRDBAND
+ EPOLLWRNORM = 0x100,
+#define EPOLLWRNORM EPOLLWRNORM
+ EPOLLWRBAND = 0x200,
+#define EPOLLWRBAND EPOLLWRBAND
+ EPOLLMSG = 0x400,
+#define EPOLLMSG EPOLLMSG
+ EPOLLERR = 0x008,
+#define EPOLLERR EPOLLERR
+ EPOLLHUP = 0x010,
+#define EPOLLHUP EPOLLHUP
+ EPOLLONESHOT = (1 << 30),
+#define EPOLLONESHOT EPOLLONESHOT
+ EPOLLET = (1 << 31)
+#define EPOLLET EPOLLET
+ };
+
+
+/* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */
+#define EPOLL_CTL_ADD 1 /* Add a file decriptor to the interface. */
+#define EPOLL_CTL_DEL 2 /* Remove a file decriptor from the interface. */
+#define EPOLL_CTL_MOD 3 /* Change file decriptor epoll_event structure. */
+
+
+typedef union epoll_data
+{
+ void *ptr;
+ int fd;
+ uint32_t u32;
+ uint64_t u64;
+} epoll_data_t;
+
+struct epoll_event
+{
+ uint32_t events; /* Epoll events */
+ epoll_data_t data; /* User data variable */
+} __attribute__ ((__packed__));
+
+
+__BEGIN_DECLS
+
+/* Creates an epoll instance. Returns an fd for the new instance.
+ The "size" parameter is a hint specifying the number of file
+ descriptors to be associated with the new instance. The fd
+ returned by epoll_create() should be closed with close(). */
+extern int epoll_create (int __size) __THROW;
+
+
+/* Manipulate an epoll instance "epfd". Returns 0 in case of success,
+ -1 in case of error ( the "errno" variable will contain the
+ specific error code ) The "op" parameter is one of the EPOLL_CTL_*
+ constants defined above. The "fd" parameter is the target of the
+ operation. The "event" parameter describes which events the caller
+ is interested in and any associated user data. */
+extern int epoll_ctl (int __epfd, int __op, int __fd,
+ struct epoll_event *__event) __THROW;
+
+
+/* Wait for events on an epoll instance "epfd". Returns the number of
+ triggered events returned in "events" buffer. Or -1 in case of
+ error with the "errno" variable set to the specific error code. The
+ "events" parameter is a buffer that will contain triggered
+ events. The "maxevents" is the maximum number of events to be
+ returned ( usually size of "events" ). The "timeout" parameter
+ specifies the maximum wait time in milliseconds (-1 == infinite). */
+extern int epoll_wait (int __epfd, struct epoll_event *__events,
+ int __maxevents, int __timeout) __THROW;
+
+__END_DECLS
+
+#endif /* sys/epoll.h */