1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
From 000e9aca3ee3f07c934a154fd375c5f3c7f9cc80 Mon Sep 17 00:00:00 2001
From: Jean-Christian de Rivaz <jc@eclis.ch>
Date: Mon, 24 Oct 2011 19:07:43 +0200
Subject: [PATCH] Add eventfd support.
Hello,
I whould like to share this simple patch that add the eventfd call to
uClibc. Please review so it can be accepted to be merged.
Jean-Christian
Signed-off-by: Jean-Christian de Rivaz <jc@eclis.ch>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
(cherry picked from commit 9ed163dc0eaebe8734c35b356c406e9eb1c68d76)
---
libc/sysdeps/linux/common/Makefile.in | 3 +-
libc/sysdeps/linux/common/eventfd.c | 18 +++++++++++
libc/sysdeps/linux/common/sys/eventfd.h | 48 +++++++++++++++++++++++++++++++
3 files changed, 68 insertions(+), 1 deletions(-)
create mode 100644 libc/sysdeps/linux/common/eventfd.c
create mode 100644 libc/sysdeps/linux/common/sys/eventfd.h
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 8f936ff..63f3f6f 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -24,7 +24,8 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += capget.c capset.c inotify.c ioperm.c iopl.c \
remap_file_pages.c sched_getaffinity.c sched_setaffinity.c \
sendfile64.c sendfile.c setfsgid.c setfsuid.c setresuid.c \
splice.c vmsplice.c tee.c signalfd.c swapoff.c swapon.c \
- sync_file_range.c sysctl.c sysinfo.c timerfd.c uselib.c vhangup.c
+ sync_file_range.c sysctl.c sysinfo.c eventfd.c timerfd.c uselib.c \
+ vhangup.c
# NPTL needs these internally: madvise.c
CSRC-$(findstring y,$(UCLIBC_LINUX_SPECIFIC)$(UCLIBC_HAS_THREADS_NATIVE)) += madvise.c
ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
diff --git a/libc/sysdeps/linux/common/eventfd.c b/libc/sysdeps/linux/common/eventfd.c
new file mode 100644
index 0000000..cc3f3f0
--- /dev/null
+++ b/libc/sysdeps/linux/common/eventfd.c
@@ -0,0 +1,18 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * eventfd() for uClibc
+ *
+ * Copyright (C) 2011 Jean-Christian de Rivaz <jc@eclis.ch>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/eventfd.h>
+
+/*
+ * eventfd()
+ */
+#ifdef __NR_eventfd
+_syscall2(int, eventfd, int, count, int, flags)
+#endif
diff --git a/libc/sysdeps/linux/common/sys/eventfd.h b/libc/sysdeps/linux/common/sys/eventfd.h
new file mode 100644
index 0000000..311f803
--- /dev/null
+++ b/libc/sysdeps/linux/common/sys/eventfd.h
@@ -0,0 +1,48 @@
+/* Copyright (C) 2007, 2008, 2009 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_EVENTFD_H
+#define _SYS_EVENTFD_H 1
+
+#include <stdint.h>
+
+
+/* Type for event counter. */
+typedef uint64_t eventfd_t;
+
+/* Flags for signalfd. */
+enum
+ {
+ EFD_SEMAPHORE = 1,
+#define EFD_SEMAPHORE EFD_SEMAPHORE
+ EFD_CLOEXEC = 02000000,
+#define EFD_CLOEXEC EFD_CLOEXEC
+ EFD_NONBLOCK = 04000
+#define EFD_NONBLOCK EFD_NONBLOCK
+ };
+
+
+__BEGIN_DECLS
+
+/* Return file descriptor for generic event channel. Set initial
+ value to COUNT. */
+extern int eventfd (int __count, int __flags) __THROW;
+
+__END_DECLS
+
+#endif /* sys/eventfd.h */
--
1.7.8
|
