mirror of https://github.com/docker/cli.git
80 lines
2.6 KiB
Go
80 lines
2.6 KiB
Go
package hcsshim
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import (
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"sync"
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"syscall"
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)
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var (
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nextCallback uintptr
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callbackMap = map[uintptr]*notifcationWatcherContext{}
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callbackMapLock = sync.RWMutex{}
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notificationWatcherCallback = syscall.NewCallback(notificationWatcher)
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// Notifications for HCS_SYSTEM handles
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hcsNotificationSystemExited hcsNotification = 0x00000001
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hcsNotificationSystemCreateCompleted hcsNotification = 0x00000002
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hcsNotificationSystemStartCompleted hcsNotification = 0x00000003
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hcsNotificationSystemPauseCompleted hcsNotification = 0x00000004
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hcsNotificationSystemResumeCompleted hcsNotification = 0x00000005
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// Notifications for HCS_PROCESS handles
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hcsNotificationProcessExited hcsNotification = 0x00010000
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// Common notifications
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hcsNotificationInvalid hcsNotification = 0x00000000
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hcsNotificationServiceDisconnect hcsNotification = 0x01000000
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)
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type hcsNotification uint32
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type notificationChannel chan error
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type notifcationWatcherContext struct {
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channels notificationChannels
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handle hcsCallback
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}
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type notificationChannels map[hcsNotification]notificationChannel
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func newChannels() notificationChannels {
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channels := make(notificationChannels)
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channels[hcsNotificationSystemExited] = make(notificationChannel, 1)
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channels[hcsNotificationSystemCreateCompleted] = make(notificationChannel, 1)
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channels[hcsNotificationSystemStartCompleted] = make(notificationChannel, 1)
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channels[hcsNotificationSystemPauseCompleted] = make(notificationChannel, 1)
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channels[hcsNotificationSystemResumeCompleted] = make(notificationChannel, 1)
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channels[hcsNotificationProcessExited] = make(notificationChannel, 1)
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channels[hcsNotificationServiceDisconnect] = make(notificationChannel, 1)
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return channels
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}
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func closeChannels(channels notificationChannels) {
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close(channels[hcsNotificationSystemExited])
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close(channels[hcsNotificationSystemCreateCompleted])
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close(channels[hcsNotificationSystemStartCompleted])
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close(channels[hcsNotificationSystemPauseCompleted])
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close(channels[hcsNotificationSystemResumeCompleted])
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close(channels[hcsNotificationProcessExited])
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close(channels[hcsNotificationServiceDisconnect])
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}
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func notificationWatcher(notificationType hcsNotification, callbackNumber uintptr, notificationStatus uintptr, notificationData *uint16) uintptr {
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var result error
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if int32(notificationStatus) < 0 {
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result = syscall.Errno(win32FromHresult(notificationStatus))
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}
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callbackMapLock.RLock()
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context := callbackMap[callbackNumber]
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callbackMapLock.RUnlock()
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if context == nil {
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return 0
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}
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context.channels[notificationType] <- result
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return 0
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}
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