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Commit 903d4a77 authored by Kevin Atkinson's avatar Kevin Atkinson
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Ensure diskUsage is correctly aligned for atomic operations.

parent 12c0c1d2
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Showing with 5 additions and 3 deletions
flatfs.go
View file @ 903d4a77
...@@ -103,6 +103,11 @@ func init() { ...@@ -103,6 +103,11 @@ func init() {
// write operations to the same key. See the explanation in // write operations to the same key. See the explanation in
// Put(). // Put().
type Datastore struct { type Datastore struct {
// atmoic operations should always be used with diskUsage.
// Must be first in struct to ensure correct alignment
// (see https://golang.org/pkg/sync/atomic/#pkg-note-BUG)
diskUsage int64
path string path string
shardStr string shardStr string
...@@ -111,9 +116,6 @@ type Datastore struct { ...@@ -111,9 +116,6 @@ type Datastore struct {
// sychronize all writes and directory changes for added safety // sychronize all writes and directory changes for added safety
sync bool sync bool
// atmoic operations should always be used with diskUsage
diskUsage int64
// these values should only be used during internalization or // these values should only be used during internalization or
// inside the checkpoint loop // inside the checkpoint loop
dirty bool dirty bool
......
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