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authorUlrich Drepper <drepper@redhat.com>2007-10-05 20:32:30 +0000
committerUlrich Drepper <drepper@redhat.com>2007-10-05 20:32:30 +0000
commit6789aaaa979339534384a212e21e7731eaddf985 (patch)
treed36b34b772aae760bd521617a4514bab1f3e9db2 /sysdeps
parent8e351378b76880f861bdcda8fc11d5769e310a00 (diff)
downloadglibc-6789aaaa979339534384a212e21e7731eaddf985.zip
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2007-10-04 Jakub Jelinek <jakub@redhat.com>
2007-10-03 Jakub Jelinek <jakub@redhat.com>
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/Makefile3
-rw-r--r--sysdeps/unix/sysv/linux/Versions2
-rw-r--r--sysdeps/unix/sysv/linux/eventfd.c43
-rw-r--r--sysdeps/unix/sysv/linux/eventfd_read.c28
-rw-r--r--sysdeps/unix/sysv/linux/eventfd_write.c28
-rw-r--r--sysdeps/unix/sysv/linux/sys/eventfd.h43
6 files changed, 145 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index e638fd0..6ba3a25 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -13,7 +13,8 @@ endif
ifeq ($(subdir),misc)
sysdep_routines += sysctl clone llseek umount umount2 readahead \
- setfsuid setfsgid makedev epoll_pwait signalfd
+ setfsuid setfsgid makedev epoll_pwait signalfd \
+ eventfd eventfd_read eventfd_write
CFLAGS-gethostid.c = -fexceptions
diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index eac6978..dbf2ae5 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -130,7 +130,7 @@ libc {
epoll_pwait; sync_file_range; sched_getcpu;
}
GLIBC_2.7 {
- signalfd;
+ eventfd; eventfd_read; eventfd_write; signalfd;
}
GLIBC_PRIVATE {
# functions used in other libraries
diff --git a/sysdeps/unix/sysv/linux/eventfd.c b/sysdeps/unix/sysv/linux/eventfd.c
new file mode 100644
index 0000000..180861a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/eventfd.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2007 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. */
+
+#include <errno.h>
+#include <sys/eventfd.h>
+#include <sysdep.h>
+
+
+int
+eventfd (int count, int flags)
+{
+ /* The system call has no flag parameter which is bad. So we have
+ to wait until we have to support to pass additional values to the
+ kernel (sys_indirect) before implementing setting flags like
+ O_NONBLOCK etc. */
+ if (flags != 0)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+#ifdef __NR_eventfd
+ return INLINE_SYSCALL (eventfd, 1, count);
+#else
+ __set_errno (ENOSYS);
+ return -1;
+#endif
+}
diff --git a/sysdeps/unix/sysv/linux/eventfd_read.c b/sysdeps/unix/sysv/linux/eventfd_read.c
new file mode 100644
index 0000000..1113f11
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/eventfd_read.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2007 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. */
+
+#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/sysdeps/unix/sysv/linux/eventfd_write.c b/sysdeps/unix/sysv/linux/eventfd_write.c
new file mode 100644
index 0000000..4bcf95d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/eventfd_write.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2007 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. */
+
+#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/sysdeps/unix/sysv/linux/sys/eventfd.h b/sysdeps/unix/sysv/linux/sys/eventfd.h
new file mode 100644
index 0000000..1ebaea7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sys/eventfd.h
@@ -0,0 +1,43 @@
+/* Copyright (C) 2007 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;
+
+
+__BEGIN_DECLS
+
+/* Return file descriptor for generic event channel. Set initial
+ value to COUNT. */
+extern int eventfd (int __count, int __flags) __THROW;
+
+/* Read event counter and possibly wait for events. */
+extern int eventfd_read (int __fd, eventfd_t *__value);
+
+/* Increment event counter. */
+extern int eventfd_write (int __fd, eventfd_t value);
+
+__END_DECLS
+
+#endif /* sys/eventfd.h */