#include <babeltrace/babeltrace-internal.h>
#include <babeltrace/object-internal.h>
#include <babeltrace/ctf-ir/clock-class-internal.h>
+#include <babeltrace/ctf-ir/utils-internal.h>
#include <stdbool.h>
#include <stdint.h>
struct bt_clock_value {
struct bt_object base;
struct bt_clock_class *clock_class;
- uint64_t value;
- bool ns_from_epoch_overflows;
- int64_t ns_from_epoch;
+ uint64_t value_cycles;
+ bool ns_from_origin_overflows;
+ int64_t ns_from_origin;
bool is_set;
- bool frozen;
};
static inline
clock_value->is_set = false;
}
-BT_UNUSED
static inline
-void _bt_clock_value_set_is_frozen(struct bt_clock_value *clock_value,
- bool is_frozen)
+void set_ns_from_origin(struct bt_clock_value *clock_value)
{
- BT_ASSERT(clock_value);
- clock_value->frozen = is_frozen;
-}
-
-static inline
-uint64_t ns_from_value(uint64_t frequency, uint64_t value)
-{
- uint64_t ns;
-
- if (frequency == UINT64_C(1000000000)) {
- ns = value;
- } else {
- double dblres = ((1e9 * (double) value) / (double) frequency);
-
- if (dblres >= (double) UINT64_MAX) {
- /* Overflows uint64_t */
- ns = -1ULL;
- } else {
- ns = (uint64_t) dblres;
- }
- }
-
- return ns;
-}
-
-static inline
-int ns_from_epoch(struct bt_clock_class *clock_class, uint64_t value,
- int64_t *ns_from_epoch, bool *overflows)
-{
- int ret = 0;
- int64_t diff;
- int64_t s_ns;
- uint64_t u_ns;
- uint64_t cycles;
-
- *overflows = false;
-
- /* Initialize nanosecond timestamp to clock's offset in seconds */
- if (clock_class->offset_s <= (INT64_MIN / INT64_C(1000000000)) ||
- clock_class->offset_s >= (INT64_MAX / INT64_C(1000000000))) {
- /*
- * Overflow: offset in seconds converted to nanoseconds
- * is outside the int64_t range.
- */
- *overflows = true;
- goto end;
- }
-
- *ns_from_epoch = clock_class->offset_s * INT64_C(1000000000);
-
- /* Add offset in cycles */
- if (clock_class->offset < 0) {
- cycles = (uint64_t) -clock_class->offset;
- } else {
- cycles = (uint64_t) clock_class->offset;
- }
-
- u_ns = ns_from_value(clock_class->frequency, cycles);
-
- if (u_ns == UINT64_C(-1) || u_ns >= INT64_MAX) {
- /*
- * Overflow: offset in cycles converted to nanoseconds
- * is outside the int64_t range.
- */
- *overflows = true;
- goto end;
- }
-
- s_ns = (int64_t) u_ns;
- BT_ASSERT(s_ns >= 0);
-
- if (clock_class->offset < 0) {
- if (*ns_from_epoch >= 0) {
- /*
- * Offset in cycles is negative so it must also
- * be negative once converted to nanoseconds.
- */
- s_ns = -s_ns;
- goto offset_ok;
- }
-
- diff = *ns_from_epoch - INT64_MIN;
-
- if (s_ns >= diff) {
- /*
- * Overflow: current timestamp in nanoseconds
- * plus the offset in cycles converted to
- * nanoseconds is outside the int64_t range.
- */
- *overflows = true;
- goto end;
- }
-
- /*
- * Offset in cycles is negative so it must also be
- * negative once converted to nanoseconds.
- */
- s_ns = -s_ns;
- } else {
- if (*ns_from_epoch <= 0) {
- goto offset_ok;
- }
-
- diff = INT64_MAX - *ns_from_epoch;
-
- if (s_ns >= diff) {
- /*
- * Overflow: current timestamp in nanoseconds
- * plus the offset in cycles converted to
- * nanoseconds is outside the int64_t range.
- */
- *overflows = true;
- goto end;
- }
- }
-
-offset_ok:
- *ns_from_epoch += s_ns;
-
- /* Add clock value (cycles) */
- u_ns = ns_from_value(clock_class->frequency, value);
-
- if (u_ns == -1ULL || u_ns >= INT64_MAX) {
- /*
- * Overflow: value converted to nanoseconds is outside
- * the int64_t range.
- */
- *overflows = true;
- goto end;
- }
-
- s_ns = (int64_t) u_ns;
- BT_ASSERT(s_ns >= 0);
-
- /* Clock value (cycles) is always positive */
- if (*ns_from_epoch <= 0) {
- goto value_ok;
- }
-
- diff = INT64_MAX - *ns_from_epoch;
-
- if (s_ns >= diff) {
- /*
- * Overflow: current timestamp in nanoseconds plus the
- * clock value converted to nanoseconds is outside the
- * int64_t range.
- */
- *overflows = true;
- goto end;
+ if (bt_util_ns_from_origin(clock_value->clock_class, clock_value->value_cycles,
+ &clock_value->ns_from_origin)) {
+ clock_value->ns_from_origin_overflows = true;
}
-value_ok:
- *ns_from_epoch += s_ns;
-
-end:
- if (*overflows) {
- *ns_from_epoch = 0;
- ret = -1;
- }
-
- return ret;
-}
-
-static inline
-void set_ns_from_epoch(struct bt_clock_value *clock_value)
-{
- (void) ns_from_epoch(clock_value->clock_class,
- clock_value->value, &clock_value->ns_from_epoch,
- &clock_value->ns_from_epoch_overflows);
}
static inline
uint64_t cycles)
{
BT_ASSERT(clock_value);
-
- clock_value->value = cycles;
- set_ns_from_epoch(clock_value);
+ clock_value->value_cycles = cycles;
+ set_ns_from_origin(clock_value);
bt_clock_value_set(clock_value);
}
static inline
-int bt_clock_value_set_value_inline(struct bt_clock_value *clock_value,
+void bt_clock_value_set_value_inline(struct bt_clock_value *clock_value,
uint64_t raw_value)
{
-#ifdef BT_ASSERT_PRE_NON_NULL
- BT_ASSERT_PRE_NON_NULL(clock_value, "Clock value");
-#endif
-
-#ifdef BT_ASSERT_PRE_HOT
- BT_ASSERT_PRE_HOT(clock_value, "Clock value", ": %!+k", clock_value);
-#endif
-
bt_clock_value_set_raw_value(clock_value, raw_value);
- return 0;
}
-#ifdef BT_DEV_MODE
-# define bt_clock_value_set_is_frozen _bt_clock_value_set_is_frozen
-#else
-# define bt_clock_value_set_is_frozen(_x, _f)
-#endif /* BT_DEV_MODE */
+BT_HIDDEN
+void bt_clock_value_destroy(struct bt_clock_value *clock_value);
+
+BT_HIDDEN
+struct bt_clock_value *bt_clock_value_new(struct bt_clock_class *clock_class);
BT_HIDDEN
struct bt_clock_value *bt_clock_value_create(
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