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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kernel
import (
"time"
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/log"
)
// AIOCallback is an function that does asynchronous I/O on behalf of a task.
type AIOCallback func(context.Context)
// QueueAIO queues an AIOCallback which will be run asynchronously.
func (t *Task) QueueAIO(cb AIOCallback) {
ctx := taskAsyncContext{t: t}
wg := &t.TaskSet().aioGoroutines
wg.Add(1)
go func() {
cb(ctx)
wg.Done()
}()
}
type taskAsyncContext struct {
context.NoopSleeper
t *Task
}
// Debugf implements log.Logger.Debugf.
func (ctx taskAsyncContext) Debugf(format string, v ...interface{}) {
ctx.t.Debugf(format, v...)
}
// Infof implements log.Logger.Infof.
func (ctx taskAsyncContext) Infof(format string, v ...interface{}) {
ctx.t.Infof(format, v...)
}
// Warningf implements log.Logger.Warningf.
func (ctx taskAsyncContext) Warningf(format string, v ...interface{}) {
ctx.t.Warningf(format, v...)
}
// IsLogging implements log.Logger.IsLogging.
func (ctx taskAsyncContext) IsLogging(level log.Level) bool {
return ctx.t.IsLogging(level)
}
// Deadline implements context.Context.Deadline.
func (ctx taskAsyncContext) Deadline() (time.Time, bool) {
return ctx.t.Deadline()
}
// Done implements context.Context.Done.
func (ctx taskAsyncContext) Done() <-chan struct{} {
return ctx.t.Done()
}
// Err implements context.Context.Err.
func (ctx taskAsyncContext) Err() error {
return ctx.t.Err()
}
// Value implements context.Context.Value.
func (ctx taskAsyncContext) Value(key interface{}) interface{} {
return ctx.t.Value(key)
}
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