+++ /dev/null
-#ifndef BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
-#define BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
-
-/*
- * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * 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.
- */
-
-#include <babeltrace/babeltrace-internal.h>
-#include <babeltrace/trace-ir/field-class.h>
-#include <babeltrace/trace-ir/clock-class-internal.h>
-#include <stdint.h>
-
-struct search_query {
- gpointer value;
- int found;
-};
-
-static inline
-uint64_t bt_util_ns_from_value(uint64_t frequency, uint64_t value_cycles)
-{
- uint64_t ns;
-
- if (frequency == UINT64_C(1000000000)) {
- ns = value_cycles;
- } else {
- double dblres = ((1e9 * (double) value_cycles) / (double) frequency);
-
- if (dblres >= (double) UINT64_MAX) {
- /* Overflows uint64_t */
- ns = UINT64_C(-1);
- } else {
- ns = (uint64_t) dblres;
- }
- }
-
- return ns;
-}
-
-static inline
-bool bt_util_get_base_offset_ns(int64_t offset_seconds, uint64_t offset_cycles,
- uint64_t frequency, int64_t *base_offset_ns)
-{
- bool overflows = false;
- uint64_t offset_cycles_ns;
-
- 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 = base_offset_ns;
-
- /* Add given value in cycles */
- 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
- * `INT64_MAX` in fact: in this case, we need to
- * subtract `INT64_MAX` from `value_ns_unsigned`, make
- * sure that the difference is less than `INT64_MAX`,
- * and try to add them one after the other to
- * `*ns_from_origin`.
- */
- ret = -1;
- goto end;
- }
-
- value_ns_signed = (int64_t) value_ns_unsigned;
- BT_ASSERT(value_ns_signed >= 0);
-
- if (*ns_from_origin <= 0) {
- goto add_value;
- }
-
- if (value_ns_signed > INT64_MAX - *ns_from_origin) {
- ret = -1;
- goto end;
- }
-
-add_value:
- *ns_from_origin += value_ns_signed;
-
-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)
-{
- int64_t min_value = UINT64_C(-1) << (size - 1);
- int64_t max_value = (UINT64_C(1) << (size - 1)) - 1;
- return value >= min_value && value <= max_value;
-}
-
-static inline
-bool bt_util_value_is_in_range_unsigned(unsigned int size, uint64_t value)
-{
- uint64_t max_value = (size == 64) ? UINT64_MAX :
- (UINT64_C(1) << size) - 1;
- return value <= max_value;
-}
-
-#endif /* BABELTRACE_TRACE_IR_UTILS_INTERNAL_H */
projects / babeltrace.git / blobdiff