mirror of
https://github.com/nabbar/golib.git
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e28c21b26c
+ Add interface SemBar to expose same interface between ProgressBar & Semaphore + Add empty function for compatibility with SemBar Package Progress : + Refactor sem function to depend of Sem interface + Replace interface function into interface and use Sem & SemBar interface as dependencies Update following test
129 lines
2.7 KiB
Go
129 lines
2.7 KiB
Go
/*
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* MIT License
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*
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* Copyright (c) 2019 Nicolas JUHEL
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package semaphore
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import (
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"context"
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"sync/atomic"
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liberr "github.com/nabbar/golib/errors"
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"golang.org/x/sync/semaphore"
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)
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type sem struct {
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d *atomic.Value // compatibility with SemBar => isCompleted
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i int64 // max process simultaneous
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s *semaphore.Weighted
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x context.Context
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c context.CancelFunc
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}
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func (s *sem) getCompleted() bool {
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if s.d == nil {
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s.d = new(atomic.Value)
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}
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if i := s.d.Load(); i == nil {
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return false
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} else if o, ok := i.(bool); !ok {
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return false
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} else {
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return o
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}
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}
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func (s *sem) setCompleted(flag bool) {
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if s.d == nil {
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s.d = new(atomic.Value)
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}
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s.d.Store(flag)
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}
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func (s *sem) NewWorker() liberr.Error {
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e := s.s.Acquire(s.context(), 1)
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return ErrorWorkerNew.Iferror(e)
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}
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func (s *sem) NewWorkerTry() bool {
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return s.s.TryAcquire(1)
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}
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func (s *sem) WaitAll() liberr.Error {
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e := s.s.Acquire(s.context(), s.i)
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s.setCompleted(true)
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return ErrorWorkerWaitAll.Iferror(e)
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}
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func (s *sem) DeferWorker() {
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s.s.Release(1)
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}
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func (s *sem) DeferMain() {
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s.setCompleted(true)
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if s.c != nil {
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s.c()
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}
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}
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func (s *sem) context() context.Context {
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if s.x == nil {
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if s.c != nil {
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s.c()
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}
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s.x, s.c = NewContext(context.Background(), 0, EmptyTime())
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}
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return s.x
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}
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func (s *sem) Current() int64 {
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return -1
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}
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func (s *sem) Completed() bool {
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return s.getCompleted()
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}
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func (s *sem) Reset(total, current int64) {
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return
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}
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func (s *sem) ResetDefined(current int64) {
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return
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}
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func (s *sem) Done() {
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return
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}
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func (s *sem) Increment(n int) {
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return
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}
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func (s *sem) Increment64(n int64) {
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return
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}
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