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// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package fuse
import (
"context"
"time"
)
// Context passes along cancelation signal and request data (PID, GID,
// UID). The name of this class predates the standard "context"
// package from Go, but it does implement the context.Context
// interface.
//
// When a FUSE request is canceled, the API routine should respond by
// returning the EINTR status code.
type Context struct {
Caller
Cancel <-chan struct{}
}
func (c *Context) Deadline() (time.Time, bool) {
return time.Time{}, false
}
func (c *Context) Done() <-chan struct{} {
return c.Cancel
}
func (c *Context) Err() error {
select {
case <-c.Cancel:
return context.Canceled
default:
return nil
}
}
type callerKeyType struct{}
var callerKey callerKeyType
func FromContext(ctx context.Context) (*Caller, bool) {
v, ok := ctx.Value(callerKey).(*Caller)
return v, ok
}
func NewContext(ctx context.Context, caller *Caller) context.Context {
return context.WithValue(ctx, callerKey, caller)
}
func (c *Context) Value(key interface{}) interface{} {
if key == callerKey {
return &c.Caller
}
return nil
}
var _ = context.Context((*Context)(nil))
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