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shared_var.go
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/
shared_var.go
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package store
import (
"errors"
"sync"
)
type shared struct {
sync.Mutex
vars map[string]string
}
// ErrNoVar is returned by (*Store).GetSharedVar when there is no such variable.
var ErrNoVar = errors.New("no such variable")
// SharedVar gets the value of a shared variable.
func (vars *shared) SharedVar(n string) (string, error) {
vars.Lock()
defer vars.Unlock()
v, ok := vars.vars[n]
if !ok {
return "", ErrNoVar
}
return v, nil
}
// SetSharedVar sets the value of a shared variable.
func (vars *shared) SetSharedVar(n, v string) error {
vars.Lock()
defer vars.Unlock()
vars.vars[n] = v
return nil
}
// DelSharedVar deletes a shared variable.
func (vars *shared) DelSharedVar(n string) error {
vars.Lock()
defer vars.Unlock()
delete(vars.vars, n)
return nil
}
func NewSharedVar() *shared {
return &shared{vars: make(map[string]string)}
}