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poll_linux.go
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/
poll_linux.go
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// +build linux
package poll
import (
"syscall"
"time"
)
type Poller struct {
epfd int
event syscall.EpollEvent
events [32]syscall.EpollEvent
}
func New(fd int) (p *Poller, err error) {
p = &Poller{}
if p.epfd, err = syscall.EpollCreate1(0); err != nil {
return nil, err
}
p.event.Events = syscall.EPOLLOUT
p.event.Fd = int32(fd)
if err = syscall.EpollCtl(p.epfd, syscall.EPOLL_CTL_ADD, fd, &p.event); err != nil {
p.Close()
return nil, err
}
return p, nil
}
func (p *Poller) Close() error {
return syscall.Close(p.epfd)
}
func (p *Poller) WaitWrite(deadline time.Time) error {
msec := -1
if !deadline.IsZero() {
d := deadline.Sub(time.Now())
msec = int(d.Nanoseconds() / 1000000) // ms!? omg...
}
n, err := syscall.EpollWait(p.epfd, p.events[:], msec)
if err != nil {
return err
}
if n < 1 {
return errTimeout
}
return nil
}