Python bindings: add has_intersection property to TraceCollection

[babeltrace.git] / include / babeltrace / clock-internal.h

diff --git a/include/babeltrace/clock-internal.h b/include/babeltrace/clock-internal.h
index 6fbc7c32c95143ba2e8ef455a2c65bc358e89432..cd6bdbae03b9d2ecc8ad7f04142378cf280b0a95 100644 (file)
--- a/include/babeltrace/clock-internal.h
+++ b/include/babeltrace/clock-internal.h
@@ -20,6 +20,14 @@
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
 static inline
@@ -34,4 +42,17 @@ uint64_t clock_cycles_to_ns(struct ctf_clock *clock, uint64_t cycles)
        }
 }
 
+/*
+ * Note: if using a frequency different from 1GHz for clock->offset, it
+ * is recommended to express the seconds in offset_s, otherwise there
+ * will be a loss of precision caused by the limited size of the double
+ * mantissa.
+ */
+static inline
+uint64_t clock_offset_ns(struct ctf_clock *clock)
+{
+       return clock->offset_s * 1000000000ULL
+                       + clock_cycles_to_ns(clock, clock->offset);
+}
+
 #endif /* _BABELTRACE_CLOCK_INTERNAL_H */