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129 lines
2.4 KiB
129 lines
2.4 KiB
// Copyright (c) 2022 Proton Technologies AG |
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// |
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// This file is part of ProtonMail Bridge. |
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// |
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// ProtonMail Bridge is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// ProtonMail Bridge is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package pool |
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import ( |
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"sync" |
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"github.com/ljanyst/peroxide/pkg/pchan" |
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) |
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type WorkFunc func(interface{}, int) (interface{}, error) |
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type DoneFunc func() |
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type Pool struct { |
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jobCh *pchan.PChan |
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} |
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func New(size int, work WorkFunc) *Pool { |
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jobCh := pchan.New() |
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for i := 0; i < size; i++ { |
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go func() { |
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for { |
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val, prio, ok := jobCh.Pop() |
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if !ok { |
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return |
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} |
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job, ok := val.(*Job) |
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if !ok { |
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panic("bad result type") |
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} |
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res, err := work(job.req, prio) |
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if err != nil { |
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job.postFailure(err) |
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} else { |
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job.postSuccess(res) |
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} |
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job.waitDone() |
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} |
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}() |
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} |
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return &Pool{jobCh: jobCh} |
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} |
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func (pool *Pool) NewJob(req interface{}, prio int) (*Job, DoneFunc) { |
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job := newJob(req) |
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job.setItem(pool.jobCh.Push(job, prio)) |
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return job, job.markDone |
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} |
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type Job struct { |
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req interface{} |
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res interface{} |
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err error |
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item *pchan.Item |
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ready, done sync.WaitGroup |
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once sync.Once |
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} |
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func newJob(req interface{}) *Job { |
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job := &Job{req: req} |
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job.ready.Add(1) |
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job.done.Add(1) |
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return job |
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} |
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func (job *Job) GetResult() (interface{}, error) { |
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job.ready.Wait() |
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return job.res, job.err |
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} |
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func (job *Job) GetPriority() int { |
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return job.item.GetPriority() |
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} |
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func (job *Job) SetPriority(prio int) { |
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job.item.SetPriority(prio) |
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} |
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func (job *Job) postSuccess(res interface{}) { |
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defer job.ready.Done() |
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job.res = res |
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} |
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func (job *Job) postFailure(err error) { |
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defer job.ready.Done() |
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job.err = err |
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} |
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func (job *Job) setItem(item *pchan.Item) { |
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job.item = item |
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} |
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func (job *Job) markDone() { |
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job.once.Do(func() { job.done.Done() }) |
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} |
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func (job *Job) waitDone() { |
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job.done.Wait() |
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}
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