Allow ref_transaction_free(NULL) and hence ref_transaction_rollback(NULL)
as no-ops. This makes ref_transaction_rollback easier to use and more similar
to plain 'free'.
In particular, it lets us rollback unconditionally as part of cleanup code
after setting 'transaction = NULL' if a transaction has been committed or
rolled back already.
This allows us to write code like
if ( (!transaction ||
ref_transaction_update(...)) ||
(ref_transaction_commit(...) && !(transaction = NULL)) {
ref_transaction_rollback(transaction);
...
}
Reviewed-by: Jonathan Nieder <jrnie...@gmail.com>
Signed-off-by: Ronnie Sahlberg <sahlb...@google.com>
---
refs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/refs.c b/refs.c
index 2114748..88d73c8 100644
--- a/refs.c
+++ b/refs.c
@@ -3312,6 +3312,9 @@ static void ref_transaction_free(struct ref_transaction
*transaction)
{
int i;
+ if (!transaction)
+ return;
+
for (i = 0; i < transaction->nr; i++)
free(transaction->updates[i]);
--
2.0.0.rc3.477.gffe78a2
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