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package main
import (
"../cnclib"
"sync"
)
type victim_data struct {
v *miller.Victim
in_use bool
lock sync.Mutex
}
type manager struct {
victims map[string]victim_data
lock sync.Mutex
}
func NewManager() manager {
return manager{ make(map[string]victim_data), sync.Mutex{} }
}
func (m *manager) SetVictim(v *miller.Victim, sid *string) {
m.lock.Lock()
defer m.lock.Unlock()
vd := victim_data{}
vd.v = v
m.victims[*sid] = vd
}
func (m *manager) getVictim(sid *string) *victim_data {
m.lock.Lock()
defer m.lock.Unlock()
ret, ok := m.victims[*sid]
if ok {
return &ret
}
return nil
}
func (m *manager) GetVictim(sid *string) *miller.Victim {
vd := m.getVictim(sid)
if vd == nil {
return nil
}
if !m.VictimInUse(sid) {
return vd.v
}
return nil
}
func (m *manager) VictimInUse(sid *string) bool {
vd := m.getVictim(sid)
if vd == nil {
return false
}
vd.lock.Lock()
defer vd.lock.Unlock()
return vd.in_use
}
func (m *manager) PushVictim(sid *string) bool {
if m.VictimInUse(sid) {
return false
}
vd := m.getVictim(sid)
vd.lock.Lock()
defer vd.lock.Unlock()
vd.in_use = true
return true
}
func (m *manager) PopVictim(sid *string) bool {
if !m.VictimInUse(sid) {
return false
}
vd := m.getVictim(sid)
vd.lock.Lock()
defer vd.lock.Unlock()
vd.in_use = false
return true
}
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