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worst_conns.go
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/
worst_conns.go
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package torrent
import (
"container/heap"
"fmt"
"unsafe"
)
func worseConn(l, r *connection) bool {
var ml multiLess
ml.NextBool(!l.useful(), !r.useful())
ml.StrictNext(
l.lastHelpful().Equal(r.lastHelpful()),
l.lastHelpful().Before(r.lastHelpful()))
ml.StrictNext(
l.completedHandshake.Equal(*r.completedHandshake),
l.completedHandshake.Before(*r.completedHandshake))
ml.Next(func() (bool, bool) {
return l.peerPriority() == r.peerPriority(), l.peerPriority() < r.peerPriority()
})
ml.StrictNext(l == r, uintptr(unsafe.Pointer(l)) < uintptr(unsafe.Pointer(r)))
less, ok := ml.FinalOk()
if !ok {
panic(fmt.Sprintf("cannot differentiate %#v and %#v", l, r))
}
return less
}
type worseConnSlice struct {
conns []*connection
}
var _ heap.Interface = &worseConnSlice{}
func (me worseConnSlice) Len() int {
return len(me.conns)
}
func (me worseConnSlice) Less(i, j int) bool {
return worseConn(me.conns[i], me.conns[j])
}
func (me *worseConnSlice) Pop() interface{} {
i := len(me.conns) - 1
ret := me.conns[i]
me.conns = me.conns[:i]
return ret
}
func (me *worseConnSlice) Push(x interface{}) {
me.conns = append(me.conns, x.(*connection))
}
func (me worseConnSlice) Swap(i, j int) {
me.conns[i], me.conns[j] = me.conns[j], me.conns[i]
}