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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-10-06 11:39:11 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-10-30 23:21:43 +0100 |
| commit | d3c3589b8b3cd4fabf4cd137facb42a7fb36bd7f (patch) | |
| tree | d71957ed6843a84c8328587604b9bdfe84363094 /tools/virtio/ringtest/ptr_ring.c | |
| parent | ringtest: use link-time optimization (diff) | |
| download | linux-d3c3589b8b3cd4fabf4cd137facb42a7fb36bd7f.tar.xz linux-d3c3589b8b3cd4fabf4cd137facb42a7fb36bd7f.zip | |
ringtest: commonize implementation of poll_avail/poll_used
Provide new primitives used_empty/avail_empty and
build poll_avail/poll_used on top of it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'tools/virtio/ringtest/ptr_ring.c')
| -rw-r--r-- | tools/virtio/ringtest/ptr_ring.c | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/tools/virtio/ringtest/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c index bd2ad1d3b7a9..635b07b4fdd3 100644 --- a/tools/virtio/ringtest/ptr_ring.c +++ b/tools/virtio/ringtest/ptr_ring.c @@ -133,18 +133,9 @@ void *get_buf(unsigned *lenp, void **bufp) return datap; } -void poll_used(void) +bool used_empty() { - void *b; - - do { - if (tailcnt == headcnt || __ptr_ring_full(&array)) { - b = NULL; - barrier(); - } else { - b = "Buffer\n"; - } - } while (!b); + return (tailcnt == headcnt || __ptr_ring_full(&array)); } void disable_call() @@ -173,14 +164,9 @@ bool enable_kick() assert(0); } -void poll_avail(void) +bool avail_empty() { - void *b; - - do { - barrier(); - b = __ptr_ring_peek(&array); - } while (!b); + return !__ptr_ring_peek(&array); } bool use_buf(unsigned *lenp, void **bufp) |