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authorKhem Raj <raj.khem@gmail.com>2014-02-20 00:30:18 -0800
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2015-02-17 23:42:30 +0100
commit9fc6da20daeac3f06116630764c36fc4943b1f3a (patch)
tree2b614c29ed48ccb9007fa6750513a57283fc88b1 /libc
parent31b0af2da8120e2b3f176d955eeca034e434b1b7 (diff)
Add eventfd_read() and eventfd_write()
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc')
-rw-r--r--libc/sysdeps/linux/common/Makefile.in2
-rw-r--r--libc/sysdeps/linux/common/eventfd.c2
-rw-r--r--libc/sysdeps/linux/common/eventfd_read.c27
-rw-r--r--libc/sysdeps/linux/common/eventfd_write.c28
-rw-r--r--libc/sysdeps/linux/common/sys/eventfd.h6
-rw-r--r--libc/sysdeps/linux/sparc/bits/eventfd.h2
6 files changed, 60 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index a175ab64c..9d41771e2 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -25,6 +25,8 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += \
capset.c \
dup3.c \
eventfd.c \
+ eventfd_read.c \
+ eventfd_write.c \
inotify.c \
ioperm.c \
iopl.c \
diff --git a/libc/sysdeps/linux/common/eventfd.c b/libc/sysdeps/linux/common/eventfd.c
index 96597ab33..500b0c002 100644
--- a/libc/sysdeps/linux/common/eventfd.c
+++ b/libc/sysdeps/linux/common/eventfd.c
@@ -15,7 +15,7 @@
* eventfd()
*/
#if defined __NR_eventfd || defined __NR_eventfd2
-int eventfd (int count, int flags)
+int eventfd (unsigned int count, int flags)
{
#if defined __NR_eventfd2
return INLINE_SYSCALL (eventfd2, 2, count, flags);
diff --git a/libc/sysdeps/linux/common/eventfd_read.c b/libc/sysdeps/linux/common/eventfd_read.c
new file mode 100644
index 000000000..75f2aaa11
--- /dev/null
+++ b/libc/sysdeps/linux/common/eventfd_read.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 2007-2014 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/eventfd.h>
+
+
+int
+eventfd_read (int fd, eventfd_t *value)
+{
+ return read (fd, value, sizeof (eventfd_t)) != sizeof (eventfd_t) ? -1 : 0;
+}
diff --git a/libc/sysdeps/linux/common/eventfd_write.c b/libc/sysdeps/linux/common/eventfd_write.c
new file mode 100644
index 000000000..e1509cf5c
--- /dev/null
+++ b/libc/sysdeps/linux/common/eventfd_write.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2007-2014 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/eventfd.h>
+
+
+int
+eventfd_write (int fd, eventfd_t value)
+{
+ return write (fd, &value,
+ sizeof (eventfd_t)) != sizeof (eventfd_t) ? -1 : 0;
+}
diff --git a/libc/sysdeps/linux/common/sys/eventfd.h b/libc/sysdeps/linux/common/sys/eventfd.h
index 1bf785f32..a47b5fecf 100644
--- a/libc/sysdeps/linux/common/sys/eventfd.h
+++ b/libc/sysdeps/linux/common/sys/eventfd.h
@@ -31,9 +31,7 @@ __BEGIN_DECLS
/* Return file descriptor for generic event channel. Set initial
value to COUNT. */
-extern int eventfd (int __count, int __flags) __THROW;
-
-#if 0 /* not (yet) implemented in uClibc */
+extern int eventfd (unsigned int __count, int __flags) __THROW;
/* Read event counter and possibly wait for events. */
extern int eventfd_read (int __fd, eventfd_t *__value);
@@ -41,8 +39,6 @@ extern int eventfd_read (int __fd, eventfd_t *__value);
/* Increment event counter. */
extern int eventfd_write (int __fd, eventfd_t __value);
-#endif
-
__END_DECLS
#endif /* sys/eventfd.h */
diff --git a/libc/sysdeps/linux/sparc/bits/eventfd.h b/libc/sysdeps/linux/sparc/bits/eventfd.h
index bed9f093b..e348cc6fb 100644
--- a/libc/sysdeps/linux/sparc/bits/eventfd.h
+++ b/libc/sysdeps/linux/sparc/bits/eventfd.h
@@ -22,7 +22,7 @@
/* Flags for eventfd. */
enum
{
- EFD_SEMAPHORE = 1,
+ EFD_SEMAPHORE = 0x000001,
#define EFD_SEMAPHORE EFD_SEMAPHORE
EFD_CLOEXEC = 0x400000,
#define EFD_CLOEXEC EFD_CLOEXEC