bt_clock_class_create(): accept mandatory trace class

[babeltrace.git] / include / babeltrace / trace-ir / utils-internal.h

diff --git a/include/babeltrace/trace-ir/utils-internal.h b/include/babeltrace/trace-ir/utils-internal.h
index 53de58fc85f9224bd90d4ac76d4b0174b9c954f0..2356d6ab6ba0db810ac9cb50537859277de4dbc8 100644 (file)
--- a/include/babeltrace/trace-ir/utils-internal.h
+++ b/include/babeltrace/trace-ir/utils-internal.h
@@ -55,23 +55,56 @@ uint64_t bt_util_ns_from_value(uint64_t frequency, uint64_t value_cycles)
 }
 
 static inline
-int bt_util_ns_from_origin(const struct bt_clock_class *clock_class,
-               uint64_t value, int64_t *ns_from_origin)
+bool bt_util_get_base_offset_ns(int64_t offset_seconds, uint64_t offset_cycles,
+               uint64_t frequency, int64_t *base_offset_ns)
 {
-       int ret = 0;
-       uint64_t value_ns_unsigned;
-       int64_t value_ns_signed;
+       bool overflows = false;
+       uint64_t offset_cycles_ns;
 
-       if (clock_class->base_offset.overflows) {
-               ret = -1;
+       BT_ASSERT(base_offset_ns);
+
+       /* Initialize nanosecond timestamp to clock's offset in seconds */
+       if (offset_seconds <= (INT64_MIN / INT64_C(1000000000) - 1) ||
+                       offset_seconds >= (INT64_MAX / INT64_C(1000000000)) - 1) {
+               /*
+                * Overflow: offset in seconds converted to nanoseconds
+                * is outside the int64_t range. We also subtract 1 here
+                * to leave "space" for the offset in cycles converted
+                * to nanoseconds (which is always less than 1 second by
+                * contract).
+                */
+               overflows = true;
                goto end;
        }
 
+       /* Offset (seconds) to nanoseconds */
+       *base_offset_ns = offset_seconds * INT64_C(1000000000);
+
+       /* Add offset in cycles */
+       BT_ASSERT(offset_cycles < frequency);
+       offset_cycles_ns = bt_util_ns_from_value(frequency,
+               offset_cycles);
+       BT_ASSERT(offset_cycles_ns < 1000000000);
+       *base_offset_ns += (int64_t) offset_cycles_ns;
+
+end:
+       return overflows;
+}
+
+static inline
+int bt_util_ns_from_origin_inline(int64_t base_offset_ns,
+               int64_t offset_seconds, uint64_t offset_cycles,
+               uint64_t frequency, uint64_t value, int64_t *ns_from_origin)
+{
+       int ret = 0;
+       uint64_t value_ns_unsigned;
+       int64_t value_ns_signed;
+
        /* Initialize to clock class's base offset */
-       *ns_from_origin = clock_class->base_offset.value_ns;
+       *ns_from_origin = base_offset_ns;
 
        /* Add given value in cycles */
-       value_ns_unsigned = bt_util_ns_from_value(clock_class->frequency, value);
+       value_ns_unsigned = bt_util_ns_from_value(frequency, value);
        if (value_ns_unsigned >= (uint64_t) INT64_MAX) {
                /*
                 * FIXME: `value_ns_unsigned` could be greater than
@@ -104,6 +137,25 @@ end:
        return ret;
 }
 
+static inline
+int bt_util_ns_from_origin_clock_class(const struct bt_clock_class *clock_class,
+               uint64_t value, int64_t *ns_from_origin)
+{
+       int ret = 0;
+
+       if (clock_class->base_offset.overflows) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = bt_util_ns_from_origin_inline(clock_class->base_offset.value_ns,
+               clock_class->offset_seconds, clock_class->offset_cycles,
+               clock_class->frequency, value, ns_from_origin);
+
+end:
+       return ret;
+}
+
 static inline
 bool bt_util_value_is_in_range_signed(uint64_t size, int64_t value)
 {