ir: allow the creation of an empty clock (nameless)

[babeltrace.git] / include / babeltrace / ctf-ir / clock.h

diff --git a/include/babeltrace/ctf-ir/clock.h b/include/babeltrace/ctf-ir/clock.h
index 123f35cdc3404f7ef2cc7bf5bff5412e61830213..5858a711ef7b0c00e0f02d8c95f2eea662794c46 100644 (file)
--- a/include/babeltrace/ctf-ir/clock.h
+++ b/include/babeltrace/ctf-ir/clock.h
@@ -49,6 +49,10 @@ struct bt_ctf_clock;
  */
 extern struct bt_ctf_clock *bt_ctf_clock_create(const char *name);
 
+extern struct bt_ctf_clock *bt_ctf_clock_create_empty(void);
+
+extern int bt_ctf_clock_set_name(struct bt_ctf_clock *clock, const char *name);
+
 /*
  * bt_ctf_clock_get_name: get a clock's name.
  *
@@ -139,10 +143,12 @@ extern int bt_ctf_clock_set_precision(struct bt_ctf_clock *clock,
  * Get the clock's offset in seconds from POSIX.1 Epoch, 1970-01-01.
  *
  * @param clock Clock instance.
+ * @param offset_s Pointer to clock offset in seconds (output).
  *
- * Returns the clock's offset in seconds, -1ULL on error.
+ * Returns 0 on success, a negative value on error.
  */
-extern uint64_t bt_ctf_clock_get_offset_s(struct bt_ctf_clock *clock);
+extern int bt_ctf_clock_get_offset_s(struct bt_ctf_clock *clock,
+               int64_t *offset_s);
 
 /*
  * bt_ctf_clock_set_offset_s: set a clock's offset in seconds.
@@ -156,18 +162,20 @@ extern uint64_t bt_ctf_clock_get_offset_s(struct bt_ctf_clock *clock);
  * Returns 0 on success, a negative value on error.
  */
 extern int bt_ctf_clock_set_offset_s(struct bt_ctf_clock *clock,
-               uint64_t offset_s);
+               int64_t offset_s);
 
 /*
- * bt_ctf_clock_get_offset_s: get a clock's offset in ticks.
+ * bt_ctf_clock_get_offset: get a clock's offset in ticks.
  *
  * Get the clock's offset in ticks from Epoch + offset_t.
  *
  * @param clock Clock instance.
+ * @param offset Clock offset in ticks from Epoch + offset_s (output).
  *
- * Returns the clock's offset in ticks from Epoch + offset_s, -1ULL on error.
+ * Returns 0 on success, a negative value on error.
  */
-extern uint64_t bt_ctf_clock_get_offset(struct bt_ctf_clock *clock);
+extern int bt_ctf_clock_get_offset(struct bt_ctf_clock *clock,
+               int64_t *offset);
 
 /*
  * bt_ctf_clock_set_offset: set a clock's offset in ticks.
@@ -180,7 +188,7 @@ extern uint64_t bt_ctf_clock_get_offset(struct bt_ctf_clock *clock);
  * Returns 0 on success, a negative value on error.
  */
 extern int bt_ctf_clock_set_offset(struct bt_ctf_clock *clock,
-               uint64_t offset);
+               int64_t offset);
 
 /*
  * bt_ctf_clock_get_is_absolute: get a clock's absolute attribute.
@@ -233,43 +241,8 @@ extern const unsigned char *bt_ctf_clock_get_uuid(struct bt_ctf_clock *clock);
 extern int bt_ctf_clock_set_uuid(struct bt_ctf_clock *clock,
                const unsigned char *uuid);
 
-/*
- * bt_ctf_clock_get_time: get a clock's current time value.
- *
- * Get the current time in nanoseconds since the clock's origin (offset and
- * offset_s attributes).
- *
- * Returns the clock's current time value, -1ULL on error.
- */
-extern uint64_t bt_ctf_clock_get_time(struct bt_ctf_clock *clock);
-
-/*
- * bt_ctf_clock_set_time: set a clock's current time value.
- *
- * Set the current time in nanoseconds since the clock's origin (offset and
- * offset_s attributes). Defaults to 0.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_clock_set_time(struct bt_ctf_clock *clock,
-               uint64_t time);
-
-/*
- * bt_ctf_clock_get and bt_ctf_clock_put: increment and decrement the
- * refcount of the clock
- *
- * These functions ensure that the clock won't be destroyed when it
- * is in use. The same number of get and put (plus one extra put to
- * release the initial reference done at creation) has to be done to
- * destroy a clock.
- *
- * When the clock refcount is decremented to 0 by a bt_ctf_clock_put,
- * the clock is freed.
- *
- * @param clock Clock instance.
- */
-extern void bt_ctf_clock_get(struct bt_ctf_clock *clock);
-extern void bt_ctf_clock_put(struct bt_ctf_clock *clock);
+extern int64_t bt_ctf_clock_ns_from_value(struct bt_ctf_clock *clock,
+               uint64_t value);
 
 #ifdef __cplusplus
 }