[PATCH v3 20/22] reftable/pq: handle allocation failures when adding entries

[Patrick Steinhardt <ps@xxxxxx>]

Handle allocation failures when adding entries to the pqueue. Adapt its
only caller accordingly.

Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
 reftable/merged.c | 5 ++++-
 reftable/pq.c     | 7 ++++++-
 reftable/pq.h     | 2 +-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/reftable/merged.c b/reftable/merged.c
index 741f62ea63..2c20845d62 100644
--- a/reftable/merged.c
+++ b/reftable/merged.c
@@ -54,7 +54,10 @@ static int merged_iter_advance_subiter(struct merged_iter *mi, size_t idx)
 	if (err)
 		return err;
 
-	merged_iter_pqueue_add(&mi->pq, &e);
+	err = merged_iter_pqueue_add(&mi->pq, &e);
+	if (err)
+		return err;
+
 	return 0;
 }
 
diff --git a/reftable/pq.c b/reftable/pq.c
index 2b5b7d1c0e..03b9912282 100644
--- a/reftable/pq.c
+++ b/reftable/pq.c
@@ -8,6 +8,7 @@ license that can be found in the LICENSE file or at
 
 #include "pq.h"
 
+#include "reftable-error.h"
 #include "reftable-record.h"
 #include "system.h"
 #include "basics.h"
@@ -44,11 +45,13 @@ struct pq_entry merged_iter_pqueue_remove(struct merged_iter_pqueue *pq)
 	return e;
 }
 
-void merged_iter_pqueue_add(struct merged_iter_pqueue *pq, const struct pq_entry *e)
+int merged_iter_pqueue_add(struct merged_iter_pqueue *pq, const struct pq_entry *e)
 {
 	size_t i = 0;
 
 	REFTABLE_ALLOC_GROW(pq->heap, pq->len + 1, pq->cap);
+	if (!pq->heap)
+		return REFTABLE_OUT_OF_MEMORY_ERROR;
 	pq->heap[pq->len++] = *e;
 
 	i = pq->len - 1;
@@ -59,6 +62,8 @@ void merged_iter_pqueue_add(struct merged_iter_pqueue *pq, const struct pq_entry
 		SWAP(pq->heap[j], pq->heap[i]);
 		i = j;
 	}
+
+	return 0;
 }
 
 void merged_iter_pqueue_release(struct merged_iter_pqueue *pq)
diff --git a/reftable/pq.h b/reftable/pq.h
index 707bd26767..83c062eeca 100644
--- a/reftable/pq.h
+++ b/reftable/pq.h
@@ -23,7 +23,7 @@ struct merged_iter_pqueue {
 };
 
 struct pq_entry merged_iter_pqueue_remove(struct merged_iter_pqueue *pq);
-void merged_iter_pqueue_add(struct merged_iter_pqueue *pq, const struct pq_entry *e);
+int merged_iter_pqueue_add(struct merged_iter_pqueue *pq, const struct pq_entry *e);
 void merged_iter_pqueue_release(struct merged_iter_pqueue *pq);
 int pq_less(struct pq_entry *a, struct pq_entry *b);
 
-- 
2.46.2.852.g229c0bf0e5.dirty