Fix: add missing ust-clock.h

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/include/lttng/ust-clock.h b/include/lttng/ust-clock.h
new file mode 100644 (file)
index 0000000..52455a6
--- /dev/null
+++ b/include/lttng/ust-clock.h
@@ -0,0 +1,67 @@
+#ifndef LTTNG_UST_CLOCK_H
+#define LTTNG_UST_CLOCK_H
+
+/*
+ * Copyright (C) 2014  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1 of
+ * the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+
+/*
+ * Set each callback for the trace clock override, and then enable the
+ * override. Those functions return negative error values on error, 0 on
+ * success.
+ */
+
+/*
+ * Set clock override read callback. This callback should return the
+ * current clock time (a 64-bit monotonic counter).
+ */
+int lttng_ust_trace_clock_set_read64_cb(uint64_t (*read64)(void));
+
+/*
+ * Set clock override frequency callback. This callback should return
+ * the frequency of the clock in cycles per second.
+ */
+int lttng_ust_trace_clock_set_freq_cb(uint64_t (*freq)(void));
+
+/*
+ * Set clock override unique identifier.
+ * LTTNG_UST_UUID_STR_LEN is the maximum length of uuid string. Includes
+ * final \0.
+ */
+#define LTTNG_UST_UUID_STR_LEN         37
+
+int lttng_ust_trace_clock_set_uuid_cb(int (*uuid)(char *uuid));
+
+/*
+ * Set clock override name.
+ */
+int lttng_ust_trace_clock_set_name_cb(const char *(*name)(void));
+
+/*
+ * Set clock override description.
+ */
+int lttng_ust_trace_clock_set_description_cb(const char *(*description)(void));
+
+/*
+ * Use the clock override rather than the default clock.
+ */
+int lttng_ust_enable_trace_clock_override(void);
+
+#endif /* LTTNG_UST_CLOCK_H */