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txn: fix subtle transaction inheritence bugs

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This fixes subtle bugs with transaction inheritence. Since we were not
passing the inherited state to moved value, we were sometimes committing
transactions more than once.

Changelog-Fixed: Fix many nostrdb transaction related crashes
This commit is contained in:
William Casarin
2024-01-26 14:03:49 -08:00
parent f190b6414c
commit e3642b92d1
8 changed files with 53 additions and 42 deletions
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28
nostrdb/Ndb.swift
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@@ -76,7 +76,8 @@ class Ndb {
static private var db_files: [String] = ["data.mdb", "lock.mdb"]
static var empty: Ndb {
Ndb(ndb: ndb_t(ndb: nil))
print("txn: NOSTRDB EMPTY")
return Ndb(ndb: ndb_t(ndb: nil))
}
static func open(path: String? = nil, owns_db_file: Bool = true) -> ndb_t? {
@@ -187,6 +188,7 @@ class Ndb {
self.closed = true
print("txn: CLOSING NOSTRDB")
ndb_destroy(self.ndb.ndb)
self.generation += 1
print("txn: NOSTRDB CLOSED")
}
@@ -195,8 +197,9 @@ class Ndb {
let db = Self.open(path: self.path, owns_db_file: self.owns_db) else {
return false
}
print("txn: NOSTRDB REOPENED (gen \(generation))")
self.generation += 1
self.closed = false
self.ndb = db
return true
@@ -368,14 +371,14 @@ class Ndb {
return txn.value
}
func lookup_note(_ id: NoteId) -> NdbTxn<NdbNote?>? {
NdbTxn(ndb: self) { txn in
func lookup_note(_ id: NoteId, txn_name: String? = nil) -> NdbTxn<NdbNote?>? {
NdbTxn(ndb: self, name: txn_name) { txn in
lookup_note_with_txn_inner(id: id, txn: txn)
}
}
func lookup_profile(_ pubkey: Pubkey) -> NdbTxn<ProfileRecord?>? {
NdbTxn(ndb: self) { txn in
func lookup_profile(_ pubkey: Pubkey, txn_name: String? = nil) -> NdbTxn<ProfileRecord?>? {
NdbTxn(ndb: self, name: txn_name) { txn in
lookup_profile_with_txn_inner(pubkey: pubkey, txn: txn)
}
}
@@ -456,17 +459,8 @@ class Ndb {
}
deinit {
//print("txn: Ndb de-init close")
//
// DO NOT CLOSE IN DESTRUCTOR! Destructor deinit is clearly
// not reliable, since it seems to be getting called more than
// once when we have a few references to the database.
//
// Not sure if this is indicitable of a larger problem but I've
// experienced nothing but hell when relying on de-init for
// global resources. Free them manually.
//
// EVIL --> self.close() <-- EVIL
print("txn: Ndb de-init")
self.close()
}
}