/
look.go
70 lines (53 loc) · 980 Bytes
/
look.go
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package utils
import "sync"
type Lock interface {
Unlock()
}
type RWUnlock struct {
rw *sync.RWMutex
}
func (r *RWUnlock) Unlock() {
r.rw.RUnlock()
}
type Unlock struct {
rw *sync.RWMutex
}
func (r *Unlock) Unlock() {
r.rw.Unlock()
}
type RWLock struct {
lock sync.Mutex
rw map[string]*sync.RWMutex
}
func NewRWLock() *RWLock {
return &RWLock{
rw: map[string]*sync.RWMutex{},
}
}
func (r *RWLock) Lock(key string) Lock {
lock := r.getRWLock(key)
lock.Lock()
return &Unlock{rw: lock}
}
//func (r *RWLock) Unlock(key string) {
// lock := r.getRWLock(key)
// lock.Unlock()
//}
func (r *RWLock) RLock(key string) Lock {
lock := r.getRWLock(key)
lock.RLock()
return &RWUnlock{rw: lock}
}
//func (r *RWLock) RUnlock(key string) {
// lock := r.getRWLock(key)
// lock.RUnlock()
//}
func (r *RWLock) getRWLock(key string) *sync.RWMutex {
r.lock.Lock()
r.lock.Unlock()
_, ex := r.rw[key]
if !ex {
r.rw[key] = &sync.RWMutex{}
}
return r.rw[key]
}