github.com/kaydxh/golang@v0.0.131/pkg/pool/instance/thread.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package instance
    23  
    24  import (
    25  	"context"
    26  	"runtime"
    27  	"sync"
    28  
    29  	runtime_ "github.com/kaydxh/golang/go/runtime"
    30  )
    31  
    32  type Thread struct {
    33  	enableOsThread bool
    34  
    35  	ctx       context.Context
    36  	cancel    context.CancelFunc
    37  	handlerCh chan func()
    38  	once      sync.Once
    39  	mu        sync.Mutex
    40  }
    41  
    42  func NewThread(enableOsThread bool) *Thread {
    43  	t := &Thread{
    44  		enableOsThread: enableOsThread,
    45  	}
    46  	t.initOnce()
    47  	return t
    48  }
    49  
    50  func (t *Thread) initOnce() {
    51  	t.once.Do(func() {
    52  		t.mu.Lock()
    53  		defer t.mu.Unlock()
    54  		t.ctx, t.cancel = context.WithCancel(context.Background())
    55  
    56  		t.handlerCh = make(chan func())
    57  		go t.DoInOSThread()
    58  	})
    59  }
    60  
    61  func (t *Thread) Do(ctx context.Context, f func()) error {
    62  	t.initOnce()
    63  
    64  	// wait group make Do func and f func return in sync
    65  	var wg sync.WaitGroup
    66  	defer wg.Wait()
    67  	wg.Add(1)
    68  
    69  	handler := func() {
    70  		defer wg.Done()
    71  		defer runtime_.Recover()
    72  		f()
    73  	}
    74  
    75  	select {
    76  	case t.handlerCh <- handler:
    77  		return nil
    78  
    79  	case <-ctx.Done():
    80  		wg.Done()
    81  		return ctx.Err()
    82  
    83  	case <-t.ctx.Done():
    84  		wg.Done()
    85  		return t.ctx.Err()
    86  	}
    87  }
    88  
    89  func (t *Thread) DoInOSThread() {
    90  
    91  	if t.enableOsThread {
    92  		runtime.LockOSThread()
    93  		defer runtime.UnlockOSThread()
    94  	}
    95  
    96  	for {
    97  		select {
    98  		case handler, ok := <-t.handlerCh:
    99  			if !ok {
   100  				return
   101  			}
   102  
   103  			if handler == nil {
   104  				continue
   105  			}
   106  			handler()
   107  
   108  		case <-t.ctx.Done():
   109  			return
   110  		}
   111  
   112  	}
   113  }