Bug 724878 - Make nsPermissionManager DB access (except init) async. r=jlebar

extensions/cookie/nsPermissionManager.cpp

@@ -498,18 +498,18 @@ nsPermissionManager::InitDB(bool aRemoveFile)
   mDBConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING("PRAGMA synchronous = OFF"));
 
   // cache frequently used statements (for insertion, deletion, and updating)
-  rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
+  rv = mDBConn->CreateAsyncStatement(NS_LITERAL_CSTRING(
     "INSERT INTO moz_hosts "
     "(id, host, type, permission, expireType, expireTime, appId, isInBrowserElement) "
     "VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)"), getter_AddRefs(mStmtInsert));
   NS_ENSURE_SUCCESS(rv, rv);
 
-  rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
+  rv = mDBConn->CreateAsyncStatement(NS_LITERAL_CSTRING(
     "DELETE FROM moz_hosts "
     "WHERE id = ?1"), getter_AddRefs(mStmtDelete));
   NS_ENSURE_SUCCESS(rv, rv);
 
-  rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
+  rv = mDBConn->CreateAsyncStatement(NS_LITERAL_CSTRING(
     "UPDATE moz_hosts "
     "SET permission = ?2, expireType= ?3, expireTime = ?4 WHERE id = ?1"),
     getter_AddRefs(mStmtUpdate));
@@ -1138,8 +1138,6 @@ nsPermissionManager::RemovePermissionsForApp(uint32_t aAppId)
   NS_ENSURE_ARG(aAppId != nsIScriptSecurityManager::NO_APP_ID);
 
   // We begin by removing all the permissions from the DB.
-  // This is not using a mozIStorageStatement because removing an app should be
-  // rare enough to not have to worry too much about performance.
   // After clearing the DB, we call AddInternal() to make sure that all
   // processes are aware of this change and the representation of the DB in
   // memory is updated.
@@ -1151,7 +1149,12 @@ nsPermissionManager::RemovePermissionsForApp(uint32_t aAppId)
   sql.AppendLiteral("DELETE FROM moz_hosts WHERE appId=");
   sql.AppendInt(aAppId);
 
-  nsresult rv = mDBConn->ExecuteSimpleSQL(sql);
+  nsCOMPtr<mozIStorageAsyncStatement> removeStmt;
+  nsresult rv = mDBConn->CreateAsyncStatement(sql, getter_AddRefs(removeStmt));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<mozIStoragePendingStatement> pending;
+  rv = removeStmt->ExecuteAsync(nullptr, getter_AddRefs(pending));
   NS_ENSURE_SUCCESS(rv, rv);
 
   GetPermissionsForAppStruct data(aAppId);
@@ -1428,7 +1431,7 @@ nsPermissionManager::NormalizeToACE(nsCString &aHost)
 
 void
 nsPermissionManager::UpdateDB(OperationType aOp,
-                              mozIStorageStatement* aStmt,
+                              mozIStorageAsyncStatement* aStmt,
                               int64_t aID,
                               const nsACString &aHost,
                               const nsACString &aType,
@@ -1503,13 +1506,13 @@ nsPermissionManager::UpdateDB(OperationType         aOp,
     }
   }
 
-  if (NS_SUCCEEDED(rv)) {
+  if (NS_FAILED(rv)) {
-    bool hasResult;
-    rv = aStmt->ExecuteStep(&hasResult);
-    aStmt->Reset();
-  }
-
-  if (NS_FAILED(rv))
     NS_WARNING("db change failed!");
+    return;
+  }
+
+  nsCOMPtr<mozIStoragePendingStatement> pending;
+  rv = aStmt->ExecuteAsync(nullptr, getter_AddRefs(pending));
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
 }
 

extensions/cookie/nsPermissionManager.h

@@ -23,7 +23,7 @@
 class nsIPermission;
 class nsIIDNService;
 class mozIStorageConnection;
-class mozIStorageStatement;
+class mozIStorageAsyncStatement;
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ -236,7 +236,7 @@ private:
   nsresult RemoveAllFromMemory();
   nsresult NormalizeToACE(nsCString &aHost);
   static void UpdateDB(OperationType aOp,
-                       mozIStorageStatement* aStmt,
+                       mozIStorageAsyncStatement* aStmt,
                        int64_t aID,
                        const nsACString& aHost,
                        const nsACString& aType,
@@ -272,9 +272,9 @@ private:
   nsCOMPtr<nsIIDNService>      mIDNService;
 
   nsCOMPtr<mozIStorageConnection> mDBConn;
-  nsCOMPtr<mozIStorageStatement> mStmtInsert;
+  nsCOMPtr<mozIStorageAsyncStatement> mStmtInsert;
-  nsCOMPtr<mozIStorageStatement> mStmtDelete;
+  nsCOMPtr<mozIStorageAsyncStatement> mStmtDelete;
-  nsCOMPtr<mozIStorageStatement> mStmtUpdate;
+  nsCOMPtr<mozIStorageAsyncStatement> mStmtUpdate;
 
   nsTHashtable<PermissionHashKey> mPermissionTable;
   // a unique, monotonically increasing id used to identify each database entry