/
pool.go
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/
pool.go
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// Copyright (c) 2019 The Jaeger Authors.
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pool
// Pool is a simple worker pool
type Pool struct {
jobs chan func()
stop chan struct{}
}
// New creates a new pool with the given number of workers
func New(workers int) *Pool {
jobs := make(chan func())
stop := make(chan struct{})
for i := 0; i < workers; i++ {
go func() {
for {
select {
case job := <-jobs:
job()
case <-stop:
return
}
}
}()
}
return &Pool{
jobs: jobs,
stop: stop,
}
}
// Execute enqueues the job to be executed by one of the workers in the pool
func (p *Pool) Execute(job func()) {
p.jobs <- job
}
// Stop halts all the workers
func (p *Pool) Stop() {
if p.stop != nil {
close(p.stop)
}
}