A Go package for implementing a FUSE file system (fork with 'almost' zero-copy read/write)
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fusego/freelists.go

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1.7 KiB

// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 fuse
import (
"unsafe"
"github.com/jacobsa/fuse/internal/buffer"
)
////////////////////////////////////////////////////////////////////////
// buffer.InMessage
////////////////////////////////////////////////////////////////////////
// LOCKS_EXCLUDED(c.mu)
func (c *Connection) getInMessage() *buffer.InMessage {
c.mu.Lock()
x := (*buffer.InMessage)(c.inMessages.Get())
c.mu.Unlock()
if x == nil {
x = buffer.NewInMessage()
}
return x
}
// LOCKS_EXCLUDED(c.mu)
func (c *Connection) putInMessage(x *buffer.InMessage) {
c.mu.Lock()
c.inMessages.Put(unsafe.Pointer(x))
c.mu.Unlock()
}
////////////////////////////////////////////////////////////////////////
// buffer.OutMessage
////////////////////////////////////////////////////////////////////////
// LOCKS_EXCLUDED(c.mu)
func (c *Connection) getOutMessage() *buffer.OutMessage {
c.mu.Lock()
x := (*buffer.OutMessage)(c.outMessages.Get())
c.mu.Unlock()
if x == nil {
x = new(buffer.OutMessage)
}
x.Reset()
return x
}
// LOCKS_EXCLUDED(c.mu)
func (c *Connection) putOutMessage(x *buffer.OutMessage) {
c.mu.Lock()
c.outMessages.Put(unsafe.Pointer(x))
c.mu.Unlock()
}