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unix: add Eventfd function on Linux

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Add support for the eventfd2 syscall on Linux.

Use the eventfd2 syscall instead of eventfd, as the latter does not
provide a flags argument and glibc also maps its eventfd() function to
the eventfd2 syscall, see the Notes section in
http://man7.org/linux/man-pages/man2/eventfd.2.html

Also add the corresponding flags values EFD_CLOEXEC, EFD_NONBLOCK and
EFD_SEMAPHORE.

Change-Id: Ia8c99e68d5966ab5c7ebe7e45423943fd7d8214e
Reviewed-on: https://go-review.googlesource.com/45093
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Tobias Klauser
2017-06-08 16:48:03 +00:00
committed by Ian Lance Taylor
parent b9e8d468b0
commit 0b25a408a5
24 changed files with 157 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
unix/mkerrors.sh
+2 -1
View File
@@ -143,6 +143,7 @@ struct ltchars {
#include <bits/sockaddr.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/inotify.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
@@ -375,7 +376,7 @@ ccflags="$@"
$2 ~ /^SYSCTL_VERS/ ||
$2 ~ /^(MS|MNT)_/ ||
$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
$2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ ||
$2 ~ /^(O|F|E?FD|NAME|S|PTRACE|PT)_/ ||
$2 ~ /^LINUX_REBOOT_CMD_/ ||
$2 ~ /^LINUX_REBOOT_MAGIC[12]$/ ||
$2 !~ "NLA_TYPE_MASK" &&
unix/syscall_linux.go
+1 -1
View File
@@ -1171,6 +1171,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
//sysnb EpollCreate(size int) (fd int, err error)
//sysnb EpollCreate1(flag int) (fd int, err error)
//sysnb EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error)
//sys Eventfd(initval uint, flags int) (fd int, err error) = SYS_EVENTFD2
//sys Exit(code int) = SYS_EXIT_GROUP
//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
//sys Fallocate(fd int, mode uint32, off int64, len int64) (err error)
@@ -1316,7 +1317,6 @@ func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) {
// EpollCtlOld
// EpollPwait
// EpollWaitOld
// Eventfd
// Execve
// Fgetxattr
// Flistxattr
unix/zerrors_linux_386.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_amd64.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_arm.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_arm64.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_mips.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x80
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_mips64.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x80
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_mips64le.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x80
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_mipsle.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x80
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_ppc64.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x1
ECHONL = 0x10
ECHOPRT = 0x20
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_ppc64le.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x1
ECHONL = 0x10
ECHOPRT = 0x20
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zerrors_linux_s390x.go
+3
View File
@@ -325,6 +325,9 @@ const (
ECHOKE = 0x800
ECHONL = 0x40
ECHOPRT = 0x400
EFD_CLOEXEC = 0x80000
EFD_NONBLOCK = 0x800
EFD_SEMAPHORE = 0x1
ENCODING_DEFAULT = 0x0
ENCODING_FM_MARK = 0x3
ENCODING_FM_SPACE = 0x4
unix/zsyscall_linux_386.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_amd64.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_arm.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_arm64.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_mips.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_mips64.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_mips64le.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_mipsle.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_ppc64.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_ppc64le.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return
unix/zsyscall_linux_s390x.go
+11
View File
@@ -511,6 +511,17 @@ func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Eventfd(initval uint, flags int) (fd int, err error) {
r0, _, e1 := Syscall(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0)
fd = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Exit(code int) {
Syscall(SYS_EXIT_GROUP, uintptr(code), 0, 0)
return