github.com/vincentwoo/docker@v0.7.3-0.20160116130405-82401a4b13c0/daemon/unpause.go (about)

     1  package daemon
     2  
     3  import (
     4  	"github.com/docker/docker/container"
     5  	derr "github.com/docker/docker/errors"
     6  )
     7  
     8  // ContainerUnpause unpauses a container
     9  func (daemon *Daemon) ContainerUnpause(name string) error {
    10  	container, err := daemon.GetContainer(name)
    11  	if err != nil {
    12  		return err
    13  	}
    14  
    15  	if err := daemon.containerUnpause(container); err != nil {
    16  		return derr.ErrorCodeCantUnpause.WithArgs(name, err)
    17  	}
    18  
    19  	return nil
    20  }
    21  
    22  // containerUnpause resumes the container execution after the container is paused.
    23  func (daemon *Daemon) containerUnpause(container *container.Container) error {
    24  	container.Lock()
    25  	defer container.Unlock()
    26  
    27  	// We cannot unpause the container which is not running
    28  	if !container.Running {
    29  		return derr.ErrorCodeNotRunning.WithArgs(container.ID)
    30  	}
    31  
    32  	// We cannot unpause the container which is not paused
    33  	if !container.Paused {
    34  		return derr.ErrorCodeNotPaused.WithArgs(container.ID)
    35  	}
    36  
    37  	if err := daemon.execDriver.Unpause(container.Command); err != nil {
    38  		return err
    39  	}
    40  
    41  	container.Paused = false
    42  	daemon.LogContainerEvent(container, "unpause")
    43  	return nil
    44  }