From 6789aaaa979339534384a212e21e7731eaddf985 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 5 Oct 2007 20:32:30 +0000 Subject: [PATCH] 2007-10-04 Jakub Jelinek 2007-10-03 Jakub Jelinek --- ChangeLog | 4 +-- sysdeps/unix/sysv/linux/Makefile | 3 ++- sysdeps/unix/sysv/linux/Versions | 2 +- sysdeps/unix/sysv/linux/eventfd.c | 43 +++++++++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/eventfd_read.c | 28 +++++++++++++++++++++ sysdeps/unix/sysv/linux/eventfd_write.c | 28 +++++++++++++++++++++ sysdeps/unix/sysv/linux/sys/eventfd.h | 43 +++++++++++++++++++++++++++++++++ 7 files changed, 147 insertions(+), 4 deletions(-) create mode 100644 sysdeps/unix/sysv/linux/eventfd.c create mode 100644 sysdeps/unix/sysv/linux/eventfd_read.c create mode 100644 sysdeps/unix/sysv/linux/eventfd_write.c create mode 100644 sysdeps/unix/sysv/linux/sys/eventfd.h diff --git a/ChangeLog b/ChangeLog index bf0e268..6458366 100644 --- a/ChangeLog +++ b/ChangeLog @@ -17,7 +17,7 @@ * sysdeps/unix/sysv/linux/sys/signalfd.h: New file. * sysdeps/unix/sysv/linux/Versions: Export signalfd for GLIBC_2.7. -2007-10-04 Jakub Jelinek +2007-10-04 Jakub Jelinek * stdlib/msort.c: Include stdint.h. (struct msort_param): New type. @@ -41,7 +41,7 @@ include now. Include if possible. * misc/bits/error.h: New file. -2007-10-03 Jakub Jelinek +2007-10-03 Jakub Jelinek * string/bits/string3.h (memcpy, memmove, mempcpy, memset, bcopy, bzero, strcpy, stpcpy, strncpy, strcat, strncat): Use 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 +#include +#include + + +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 +#include +#include + + +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 +#include +#include + + +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 + + +/* 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 */ -- 2.7.4