diff options
Diffstat (limited to 'src/svm/svm_fifo.c')
| -rw-r--r-- | src/svm/svm_fifo.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c index b2c8e5bdb16..3552192a768 100644 --- a/src/svm/svm_fifo.c +++ b/src/svm/svm_fifo.c @@ -169,6 +169,9 @@ format_svm_fifo (u8 * s, va_list * args) svm_fifo_t *f = va_arg (*args, svm_fifo_t *); int verbose = va_arg (*args, int); + if (!s) + return s; + s = format (s, "cursize %u nitems %u has_event %d\n", f->cursize, f->nitems, f->has_event); s = format (s, " head %d tail %d\n", f->head, f->tail); @@ -459,7 +462,7 @@ svm_fifo_enqueue_internal (svm_fifo_t * f, u32 max_bytes, f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; if (PREDICT_FALSE (cursize == f->nitems)) - return -2; /* fifo stuffed */ + return SVM_FIFO_FULL; nitems = f->nitems; @@ -615,6 +618,20 @@ svm_fifo_enqueue_with_offset (svm_fifo_t * f, copy_from_here); } +void +svm_fifo_overwrite_head (svm_fifo_t * f, u8 * data, u32 len) +{ + u32 first_chunk; + ASSERT (len <= f->nitems); + if (len < f->nitems - f->head) + clib_memcpy (&f->data[f->head], data, len); + else + { + first_chunk = len - (f->nitems - f->head); + clib_memcpy (&f->data[f->head], data, first_chunk); + clib_memcpy (f->data, data + first_chunk, len - first_chunk); + } +} static int svm_fifo_dequeue_internal (svm_fifo_t * f, u32 max_bytes, u8 * copy_here) |