1 #ifndef BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
2 #define BABELTRACE_TRACE_IR_UTILS_INTERNAL_H
5 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 #include <babeltrace/babeltrace-internal.h>
27 #include <babeltrace/trace-ir/field-class.h>
28 #include <babeltrace/trace-ir/clock-class-internal.h>
37 uint64_t bt_util_ns_from_value(uint64_t frequency
, uint64_t value_cycles
)
41 if (frequency
== UINT64_C(1000000000)) {
44 double dblres
= ((1e9
* (double) value_cycles
) / (double) frequency
);
46 if (dblres
>= (double) UINT64_MAX
) {
47 /* Overflows uint64_t */
50 ns
= (uint64_t) dblres
;
58 bool bt_util_get_base_offset_ns(int64_t offset_seconds
, uint64_t offset_cycles
,
59 uint64_t frequency
, int64_t *base_offset_ns
)
61 bool overflows
= false;
62 uint64_t offset_cycles_ns
;
64 BT_ASSERT(base_offset_ns
);
66 /* Initialize nanosecond timestamp to clock's offset in seconds */
67 if (offset_seconds
<= (INT64_MIN
/ INT64_C(1000000000) - 1) ||
68 offset_seconds
>= (INT64_MAX
/ INT64_C(1000000000)) - 1) {
70 * Overflow: offset in seconds converted to nanoseconds
71 * is outside the int64_t range. We also subtract 1 here
72 * to leave "space" for the offset in cycles converted
73 * to nanoseconds (which is always less than 1 second by
80 /* Offset (seconds) to nanoseconds */
81 *base_offset_ns
= offset_seconds
* INT64_C(1000000000);
83 /* Add offset in cycles */
84 BT_ASSERT(offset_cycles
< frequency
);
85 offset_cycles_ns
= bt_util_ns_from_value(frequency
,
87 BT_ASSERT(offset_cycles_ns
< 1000000000);
88 *base_offset_ns
+= (int64_t) offset_cycles_ns
;
95 int bt_util_ns_from_origin_inline(int64_t base_offset_ns
,
96 int64_t offset_seconds
, uint64_t offset_cycles
,
97 uint64_t frequency
, uint64_t value
, int64_t *ns_from_origin
)
100 uint64_t value_ns_unsigned
;
101 int64_t value_ns_signed
;
103 /* Initialize to clock class's base offset */
104 *ns_from_origin
= base_offset_ns
;
106 /* Add given value in cycles */
107 value_ns_unsigned
= bt_util_ns_from_value(frequency
, value
);
108 if (value_ns_unsigned
>= (uint64_t) INT64_MAX
) {
110 * FIXME: `value_ns_unsigned` could be greater than
111 * `INT64_MAX` in fact: in this case, we need to
112 * subtract `INT64_MAX` from `value_ns_unsigned`, make
113 * sure that the difference is less than `INT64_MAX`,
114 * and try to add them one after the other to
121 value_ns_signed
= (int64_t) value_ns_unsigned
;
122 BT_ASSERT(value_ns_signed
>= 0);
124 if (*ns_from_origin
<= 0) {
128 if (value_ns_signed
> INT64_MAX
- *ns_from_origin
) {
134 *ns_from_origin
+= value_ns_signed
;
141 int bt_util_ns_from_origin_clock_class(const struct bt_clock_class
*clock_class
,
142 uint64_t value
, int64_t *ns_from_origin
)
146 if (clock_class
->base_offset
.overflows
) {
151 ret
= bt_util_ns_from_origin_inline(clock_class
->base_offset
.value_ns
,
152 clock_class
->offset_seconds
, clock_class
->offset_cycles
,
153 clock_class
->frequency
, value
, ns_from_origin
);
160 bool bt_util_value_is_in_range_signed(uint64_t size
, int64_t value
)
162 int64_t min_value
= UINT64_C(-1) << (size
- 1);
163 int64_t max_value
= (UINT64_C(1) << (size
- 1)) - 1;
164 return value
>= min_value
&& value
<= max_value
;
168 bool bt_util_value_is_in_range_unsigned(unsigned int size
, uint64_t value
)
170 uint64_t max_value
= (size
== 64) ? UINT64_MAX
:
171 (UINT64_C(1) << size
) - 1;
172 return value
<= max_value
;
175 #endif /* BABELTRACE_TRACE_IR_UTILS_INTERNAL_H */
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