github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/kernel/timekeeper_state.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kernel
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/metacubex/gvisor/pkg/sentry/time"
    21  )
    22  
    23  // beforeSave is invoked by stateify.
    24  func (t *Timekeeper) beforeSave() {
    25  	if t.stop != nil {
    26  		panic("pauseUpdates must be called before Save")
    27  	}
    28  
    29  	// N.B. we want the *offset* monotonic time.
    30  	var err error
    31  	if t.saveMonotonic, err = t.GetTime(time.Monotonic); err != nil {
    32  		panic("unable to get current monotonic time: " + err.Error())
    33  	}
    34  
    35  	if t.saveRealtime, err = t.GetTime(time.Realtime); err != nil {
    36  		panic("unable to get current realtime: " + err.Error())
    37  	}
    38  }
    39  
    40  // afterLoad is invoked by stateify.
    41  func (t *Timekeeper) afterLoad(context.Context) {
    42  	t.restored = make(chan struct{})
    43  }