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blockchain: thread safe store.Height()

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This commit is contained in:
Ethan Buchman
2016-12-20 00:45:45 -05:00
parent e981ff4e7d
commit b2376058a1
1 changed files with 15 additions and 7 deletions
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22
blockchain/store.go
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@@ -5,6 +5,7 @@ import (
"encoding/json"
"fmt"
"io"
"sync"
. "github.com/tendermint/go-common"
dbm "github.com/tendermint/go-db"
@@ -27,8 +28,10 @@ the Commit data outside the Block.
Panics indicate probable corruption in the data
*/
type BlockStore struct {
db dbm.DB
mtx sync.Mutex
height int
db dbm.DB
}
func NewBlockStore(db dbm.DB) *BlockStore {
@@ -41,6 +44,8 @@ func NewBlockStore(db dbm.DB) *BlockStore {
// Height() returns the last known contiguous block height.
func (bs *BlockStore) Height() int {
bs.mtx.Lock()
defer bs.mtx.Unlock()
return bs.height
}
@@ -141,8 +146,9 @@ func (bs *BlockStore) LoadSeenCommit(height int) *types.Commit {
// most recent height. Otherwise they'd stall at H-1.
func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit) {
height := block.Height
if height != bs.height+1 {
PanicSanity(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bs.height+1, height))
bsHeight := bs.Height()
if height != bsHeight+1 {
PanicSanity(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bsHeight+1, height))
}
if !blockParts.IsComplete() {
PanicSanity(Fmt("BlockStore can only save complete block part sets"))
@@ -155,7 +161,7 @@ func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, s
// Save block parts
for i := 0; i < blockParts.Total(); i++ {
bs.saveBlockPart(height, i, blockParts.GetPart(i))
bs.saveBlockPart(height, bsHeight, i, blockParts.GetPart(i))
}
// Save block commit (duplicate and separate from the Block)
@@ -171,15 +177,17 @@ func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, s
BlockStoreStateJSON{Height: height}.Save(bs.db)
// Done!
bs.mtx.Lock()
bs.height = height
bs.mtx.Unlock()
// Flush
bs.db.SetSync(nil, nil)
}
func (bs *BlockStore) saveBlockPart(height int, index int, part *types.Part) {
if height != bs.height+1 {
PanicSanity(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bs.height+1, height))
func (bs *BlockStore) saveBlockPart(height, bsHeight int, index int, part *types.Part) {
if height != bsHeight+1 {
PanicSanity(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bsHeight+1, height))
}
partBytes := wire.BinaryBytes(part)
bs.db.Set(calcBlockPartKey(height, index), partBytes)