Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 61 insertions, 0 deletions

diff --git a/trace/control-internal.h b/trace/control-internal.h
new file mode 100644
index 000000000..8b2b50a7c
--- /dev/null
+++ b/trace/control-internal.h
@@ -0,0 +1,61 @@
+/*
+ * Interface for configuring and controlling the state of tracing events.
+ *
+ * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef TRACE__CONTROL_INTERNAL_H
+#define TRACE__CONTROL_INTERNAL_H
+
+extern int trace_events_enabled_count;
+
+
+static inline bool trace_event_is_pattern(const char *str)
+{
+    assert(str != NULL);
+    return strchr(str, '*') != NULL;
+}
+
+static inline uint32_t trace_event_get_id(TraceEvent *ev)
+{
+    assert(ev != NULL);
+    return ev->id;
+}
+
+static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
+{
+    return ev->vcpu_id;
+}
+
+static inline bool trace_event_is_vcpu(TraceEvent *ev)
+{
+    return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
+}
+
+static inline const char * trace_event_get_name(TraceEvent *ev)
+{
+    assert(ev != NULL);
+    return ev->name;
+}
+
+static inline bool trace_event_get_state_static(TraceEvent *ev)
+{
+    assert(ev != NULL);
+    return ev->sstate;
+}
+
+/* it's on fast path, avoid consistency checks (asserts) */
+#define trace_event_get_state_dynamic_by_id(id) \
+    (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
+
+static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
+{
+    return unlikely(trace_events_enabled_count) && *ev->dstate;
+}
+
+void trace_event_register_group(TraceEvent **events);
+
+#endif /* TRACE__CONTROL_INTERNAL_H */