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-rw-r--r--src/svm/svm_fifo_segment.c28
1 files changed, 15 insertions, 13 deletions
diff --git a/src/svm/svm_fifo_segment.c b/src/svm/svm_fifo_segment.c
index 459b1d1d8e5..7c6d80229ad 100644
--- a/src/svm/svm_fifo_segment.c
+++ b/src/svm/svm_fifo_segment.c
@@ -332,7 +332,7 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
{
ssvm_shared_header_t *sh;
svm_fifo_segment_header_t *fsh;
- svm_fifo_t *f;
+ svm_fifo_t *f = 0;
void *oldheap;
int freelist_index;
@@ -351,9 +351,7 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
- max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
sh = s->ssvm.sh;
-
ssvm_lock_non_recursive (sh, 1);
- oldheap = ssvm_push_heap (sh);
fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
switch (list_index)
@@ -361,12 +359,17 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
case FIFO_SEGMENT_RX_FREELIST:
case FIFO_SEGMENT_TX_FREELIST:
vec_validate_init_empty (fsh->free_fifos, freelist_index, 0);
-
f = fsh->free_fifos[freelist_index];
- if (PREDICT_FALSE (f == 0))
+ if (PREDICT_FALSE (!f))
{
+ /* Preallocated and no fifo left. Don't even try */
+ if (fsh->flags & FIFO_SEGMENT_F_IS_PREALLOCATED)
+ goto done;
+
+ oldheap = ssvm_push_heap (sh);
allocate_new_fifo_chunk (fsh, data_size_in_bytes,
FIFO_SEGMENT_ALLOC_CHUNK_SIZE);
+ ssvm_pop_heap (oldheap);
f = fsh->free_fifos[freelist_index];
}
if (PREDICT_TRUE (f != 0))
@@ -380,7 +383,7 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
f->freelist_index = freelist_index;
goto found;
}
- /* FALLTHROUGH */
+ break;
case FIFO_SEGMENT_FREELIST_NONE:
break;
@@ -389,14 +392,13 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
break;
}
- /* Note: this can fail, in which case: create another segment */
+ /* Catch all that allocates just one fifo. Note: this can fail,
+ * in which case: create another segment */
+ oldheap = ssvm_push_heap (sh);
f = svm_fifo_create (data_size_in_bytes);
+ ssvm_pop_heap (oldheap);
if (PREDICT_FALSE (f == 0))
- {
- ssvm_pop_heap (oldheap);
- ssvm_unlock_non_recursive (sh);
- return (0);
- }
+ goto done;
f->freelist_index = freelist_index;
found:
@@ -415,7 +417,7 @@ found:
}
fsh->n_active_fifos++;
- ssvm_pop_heap (oldheap);
+done:
ssvm_unlock_non_recursive (sh);
return (f);
}