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authorIan Lance Taylor <ian@gcc.gnu.org>2013-07-16 06:54:42 +0000
committerIan Lance Taylor <ian@gcc.gnu.org>2013-07-16 06:54:42 +0000
commitbe47d6eceffd2c5dbbc1566d5eea490527fb2bd4 (patch)
tree0e8fda573576bb4181dba29d0e88380a8c38fafd /libgo/go/net/fd_linux.go
parentefb30cdeb003fd7c585ee0d7657340086abcbd9e (diff)
downloadgcc-be47d6eceffd2c5dbbc1566d5eea490527fb2bd4.tar.gz
libgo: Update to Go 1.1.1.
From-SVN: r200974
Diffstat (limited to 'libgo/go/net/fd_linux.go')
-rw-r--r--libgo/go/net/fd_linux.go188
1 files changed, 0 insertions, 188 deletions
diff --git a/libgo/go/net/fd_linux.go b/libgo/go/net/fd_linux.go
deleted file mode 100644
index 8ecbff8bdf0..00000000000
--- a/libgo/go/net/fd_linux.go
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Waiting for FDs via epoll(7).
-
-package net
-
-import (
- "os"
- "syscall"
-)
-
-const (
- readFlags = syscall.EPOLLIN | syscall.EPOLLRDHUP
- writeFlags = syscall.EPOLLOUT
-)
-
-type pollster struct {
- epfd int
-
- // Events we're already waiting for
- // Must hold pollServer lock
- events map[int]uint32
-
- // An event buffer for EpollWait.
- // Used without a lock, may only be used by WaitFD.
- waitEventBuf [10]syscall.EpollEvent
- waitEvents []syscall.EpollEvent
-
- // An event buffer for EpollCtl, to avoid a malloc.
- // Must hold pollServer lock.
- ctlEvent syscall.EpollEvent
-}
-
-func newpollster() (p *pollster, err error) {
- p = new(pollster)
- if p.epfd, err = syscall.EpollCreate1(syscall.EPOLL_CLOEXEC); err != nil {
- if err != syscall.ENOSYS {
- return nil, os.NewSyscallError("epoll_create1", err)
- }
- // The arg to epoll_create is a hint to the kernel
- // about the number of FDs we will care about.
- // We don't know, and since 2.6.8 the kernel ignores it anyhow.
- if p.epfd, err = syscall.EpollCreate(16); err != nil {
- return nil, os.NewSyscallError("epoll_create", err)
- }
- syscall.CloseOnExec(p.epfd)
- }
- p.events = make(map[int]uint32)
- return p, nil
-}
-
-func (p *pollster) AddFD(fd int, mode int, repeat bool) (bool, error) {
- // pollServer is locked.
-
- var already bool
- p.ctlEvent.Fd = int32(fd)
- p.ctlEvent.Events, already = p.events[fd]
- if !repeat {
- p.ctlEvent.Events |= syscall.EPOLLONESHOT
- }
- if mode == 'r' {
- p.ctlEvent.Events |= readFlags
- } else {
- p.ctlEvent.Events |= writeFlags
- }
-
- var op int
- if already {
- op = syscall.EPOLL_CTL_MOD
- } else {
- op = syscall.EPOLL_CTL_ADD
- }
- if err := syscall.EpollCtl(p.epfd, op, fd, &p.ctlEvent); err != nil {
- return false, os.NewSyscallError("epoll_ctl", err)
- }
- p.events[fd] = p.ctlEvent.Events
- return false, nil
-}
-
-func (p *pollster) StopWaiting(fd int, bits uint) {
- // pollServer is locked.
-
- events, already := p.events[fd]
- if !already {
- // The fd returned by the kernel may have been
- // cancelled already; return silently.
- return
- }
-
- // If syscall.EPOLLONESHOT is not set, the wait
- // is a repeating wait, so don't change it.
- if events&syscall.EPOLLONESHOT == 0 {
- return
- }
-
- // Disable the given bits.
- // If we're still waiting for other events, modify the fd
- // event in the kernel. Otherwise, delete it.
- events &= ^uint32(bits)
- if int32(events)&^syscall.EPOLLONESHOT != 0 {
- p.ctlEvent.Fd = int32(fd)
- p.ctlEvent.Events = events
- if err := syscall.EpollCtl(p.epfd, syscall.EPOLL_CTL_MOD, fd, &p.ctlEvent); err != nil {
- print("Epoll modify fd=", fd, ": ", err.Error(), "\n")
- }
- p.events[fd] = events
- } else {
- if err := syscall.EpollCtl(p.epfd, syscall.EPOLL_CTL_DEL, fd, nil); err != nil {
- print("Epoll delete fd=", fd, ": ", err.Error(), "\n")
- }
- delete(p.events, fd)
- }
-}
-
-func (p *pollster) DelFD(fd int, mode int) bool {
- // pollServer is locked.
-
- if mode == 'r' {
- p.StopWaiting(fd, readFlags)
- } else {
- p.StopWaiting(fd, writeFlags)
- }
-
- // Discard any queued up events.
- i := 0
- for i < len(p.waitEvents) {
- if fd == int(p.waitEvents[i].Fd) {
- copy(p.waitEvents[i:], p.waitEvents[i+1:])
- p.waitEvents = p.waitEvents[:len(p.waitEvents)-1]
- } else {
- i++
- }
- }
- return false
-}
-
-func (p *pollster) WaitFD(s *pollServer, nsec int64) (fd int, mode int, err error) {
- for len(p.waitEvents) == 0 {
- var msec int = -1
- if nsec > 0 {
- msec = int((nsec + 1e6 - 1) / 1e6)
- }
-
- s.Unlock()
- n, err := syscall.EpollWait(p.epfd, p.waitEventBuf[0:], msec)
- s.Lock()
-
- if err != nil {
- if err == syscall.EAGAIN || err == syscall.EINTR {
- continue
- }
- return -1, 0, os.NewSyscallError("epoll_wait", err)
- }
- if n == 0 {
- return -1, 0, nil
- }
- p.waitEvents = p.waitEventBuf[0:n]
- }
-
- ev := &p.waitEvents[0]
- p.waitEvents = p.waitEvents[1:]
-
- fd = int(ev.Fd)
-
- if ev.Events&writeFlags != 0 {
- p.StopWaiting(fd, writeFlags)
- return fd, 'w', nil
- }
- if ev.Events&readFlags != 0 {
- p.StopWaiting(fd, readFlags)
- return fd, 'r', nil
- }
-
- // Other events are error conditions - wake whoever is waiting.
- events, _ := p.events[fd]
- if events&writeFlags != 0 {
- p.StopWaiting(fd, writeFlags)
- return fd, 'w', nil
- }
- p.StopWaiting(fd, readFlags)
- return fd, 'r', nil
-}
-
-func (p *pollster) Close() error {
- return os.NewSyscallError("close", syscall.Close(p.epfd))
-}