replay: make locking visible outside replay code

The replay_mutex_lock/unlock/locked functions are now going to be used
for ensuring lock-step behaviour between the two threads. Make them
public API functions and also provide stubs for non-QEMU builds on
common paths.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20180227095242.1060.16601.stgit@pasha-VirtualBox>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/stubs/replay.c b/stubs/replay.c
index 9c8aa48c9c..04279abb2c 100644
--- a/stubs/replay.c
+++ b/stubs/replay.c
@@ -72,3 +72,11 @@ uint64_t blkreplay_next_id(void)
 {
     return 0;
 }
+
+void replay_mutex_lock(void)
+{
+}
+
+void replay_mutex_unlock(void)
+{
+}