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func_ptr.go
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func_ptr.go
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// Copyright 2020 The searKing Author. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package resilience
type funcPtr struct {
x interface{}
ready func(x interface{}) error
close func(x interface{})
}
func (r *funcPtr) Value() interface{} {
if r == nil {
return nil
}
return r.x
}
func (r *funcPtr) Ready() error {
if r == nil {
return nil
}
if r.ready == nil {
return nil
}
return r.ready(r.x)
}
func (r *funcPtr) Close() {
if r == nil {
return
}
if r.close == nil {
return
}
r.close(r.x)
}
func WithFunc(x interface{}, ready func(x interface{}) error,
close func(x interface{})) (Ptr, error) {
return &funcPtr{
x: x,
ready: ready,
close: close,
}, nil
}
func WithFuncNewer(new func() (interface{}, error),
ready func(x interface{}) error,
close func(x interface{})) func() (Ptr, error) {
return func() (Ptr, error) {
if new == nil {
return nil, ErrEmptyValue
}
x, err := new()
if err != nil {
return nil, err
}
return &funcPtr{
x: x,
ready: ready,
close: close,
}, nil
}
}