github.com/cuiweixie/go-ethereum@v1.8.2-0.20180303084001-66cd41af1e38/swarm/fuse/swarmfs.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package fuse
    18  
    19  import (
    20  	"github.com/ethereum/go-ethereum/swarm/api"
    21  	"sync"
    22  	"time"
    23  )
    24  
    25  const (
    26  	Swarmfs_Version = "0.1"
    27  	mountTimeout    = time.Second * 5
    28  	unmountTimeout  = time.Second * 10
    29  	maxFuseMounts   = 5
    30  )
    31  
    32  var (
    33  	swarmfs     *SwarmFS // Swarm file system singleton
    34  	swarmfsLock sync.Once
    35  
    36  	inode     uint64 = 1 // global inode
    37  	inodeLock sync.RWMutex
    38  )
    39  
    40  type SwarmFS struct {
    41  	swarmApi     *api.Api
    42  	activeMounts map[string]*MountInfo
    43  	swarmFsLock  *sync.RWMutex
    44  }
    45  
    46  func NewSwarmFS(api *api.Api) *SwarmFS {
    47  	swarmfsLock.Do(func() {
    48  		swarmfs = &SwarmFS{
    49  			swarmApi:     api,
    50  			swarmFsLock:  &sync.RWMutex{},
    51  			activeMounts: map[string]*MountInfo{},
    52  		}
    53  	})
    54  	return swarmfs
    55  
    56  }
    57  
    58  // Inode numbers need to be unique, they are used for caching inside fuse
    59  func NewInode() uint64 {
    60  	inodeLock.Lock()
    61  	defer inodeLock.Unlock()
    62  	inode += 1
    63  	return inode
    64  }