lotus/lib/blockstore/syncstore.go
2020-11-10 12:40:32 +00:00

80 lines
1.9 KiB
Go

package blockstore
import (
"context"
"sync"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
)
// SyncStore is a terminal blockstore that is a synchronized version
// of MemStore.
type SyncStore struct {
mu sync.RWMutex
bs MemStore // specifically use a memStore to save indirection overhead.
}
func (m *SyncStore) DeleteBlock(k cid.Cid) error {
m.mu.Lock()
defer m.mu.Unlock()
return m.bs.DeleteBlock(k)
}
func (m *SyncStore) Has(k cid.Cid) (bool, error) {
m.mu.RLock()
defer m.mu.RUnlock()
return m.bs.Has(k)
}
func (m *SyncStore) View(k cid.Cid, callback func([]byte) error) error {
m.mu.RLock()
defer m.mu.RUnlock()
return m.bs.View(k, callback)
}
func (m *SyncStore) Get(k cid.Cid) (blocks.Block, error) {
m.mu.RLock()
defer m.mu.RUnlock()
return m.bs.Get(k)
}
// GetSize returns the CIDs mapped BlockSize
func (m *SyncStore) GetSize(k cid.Cid) (int, error) {
m.mu.RLock()
defer m.mu.RUnlock()
return m.bs.GetSize(k)
}
// Put puts a given block to the underlying datastore
func (m *SyncStore) Put(b blocks.Block) error {
m.mu.Lock()
defer m.mu.Unlock()
return m.bs.Put(b)
}
// PutMany puts a slice of blocks at the same time using batching
// capabilities of the underlying datastore whenever possible.
func (m *SyncStore) PutMany(bs []blocks.Block) error {
m.mu.Lock()
defer m.mu.Unlock()
return m.bs.PutMany(bs)
}
// AllKeysChan returns a channel from which
// the CIDs in the Blockstore can be read. It should respect
// the given context, closing the channel if it becomes Done.
func (m *SyncStore) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
m.mu.RLock()
defer m.mu.RUnlock()
// this blockstore implementation doesn't do any async work.
return m.bs.AllKeysChan(ctx)
}
// HashOnRead specifies if every read block should be
// rehashed to make sure it matches its CID.
func (m *SyncStore) HashOnRead(enabled bool) {
// noop
}