diff options
Diffstat (limited to 'prototypes/connections/state.h')
| -rw-r--r-- | prototypes/connections/state.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/prototypes/connections/state.h b/prototypes/connections/state.h index d1bc0fa..d0b386c 100644 --- a/prototypes/connections/state.h +++ b/prototypes/connections/state.h @@ -24,6 +24,14 @@ int64_t pure_draft_revision(const PureDraft *); * splice, commit or close of this draft. */ PureResult pure_draft_read(const PureDraft *, size_t offset, size_t length, bool (*visit)(void *, PureSpan), void *context); +/* An immutable version of a draft's value. It stays readable while the draft + * is held (reclamation is suspended) and until the next commit or close. */ +typedef struct { uint64_t ref, bytes; } PureVersion; +PureVersion pure_draft_version(const PureDraft *); +PureResult pure_draft_read_version(const PureDraft *, PureVersion, size_t offset, size_t length, + bool (*visit)(void *, PureSpan), void *context); +/* While held, edits keep every earlier version's nodes (one transaction). */ +void pure_draft_hold(PureDraft *, bool held); /* Publish if the key is still at the draft's base revision. On success the * draft continues from the new revision; on any failure it is unchanged. */ PureResult pure_draft_commit(PureDraft *, int64_t *revision); |