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108b91d0 PP |
1 | #ifndef BABELTRACE_TRACE_IR_UTILS_INTERNAL_H |
2 | #define BABELTRACE_TRACE_IR_UTILS_INTERNAL_H | |
bae99cf9 PP |
3 | |
4 | /* | |
bae99cf9 PP |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <babeltrace/babeltrace-internal.h> | |
939190b3 | 25 | #include <babeltrace/trace-ir/field-classes.h> |
108b91d0 | 26 | #include <babeltrace/trace-ir/clock-class-internal.h> |
bae99cf9 PP |
27 | #include <stdint.h> |
28 | ||
8deee039 PP |
29 | struct search_query { |
30 | gpointer value; | |
31 | int found; | |
32 | }; | |
33 | ||
7b33a0e0 PP |
34 | static inline |
35 | uint64_t bt_util_ns_from_value(uint64_t frequency, uint64_t value_cycles) | |
36 | { | |
37 | uint64_t ns; | |
38 | ||
39 | if (frequency == UINT64_C(1000000000)) { | |
40 | ns = value_cycles; | |
41 | } else { | |
42 | double dblres = ((1e9 * (double) value_cycles) / (double) frequency); | |
43 | ||
44 | if (dblres >= (double) UINT64_MAX) { | |
45 | /* Overflows uint64_t */ | |
46 | ns = UINT64_C(-1); | |
47 | } else { | |
48 | ns = (uint64_t) dblres; | |
49 | } | |
50 | } | |
51 | ||
52 | return ns; | |
53 | } | |
54 | ||
55 | static inline | |
78cf9df6 PP |
56 | int bt_util_ns_from_origin(const struct bt_clock_class *clock_class, |
57 | uint64_t value, int64_t *ns_from_origin) | |
7b33a0e0 PP |
58 | { |
59 | int ret = 0; | |
60 | uint64_t value_ns_unsigned; | |
61 | int64_t value_ns_signed; | |
62 | ||
63 | if (clock_class->base_offset.overflows) { | |
64 | ret = -1; | |
65 | goto end; | |
66 | } | |
67 | ||
68 | /* Initialize to clock class's base offset */ | |
69 | *ns_from_origin = clock_class->base_offset.value_ns; | |
70 | ||
71 | /* Add given value in cycles */ | |
72 | value_ns_unsigned = bt_util_ns_from_value(clock_class->frequency, value); | |
73 | if (value_ns_unsigned >= (uint64_t) INT64_MAX) { | |
74 | /* | |
75 | * FIXME: `value_ns_unsigned` could be greater than | |
76 | * `INT64_MAX` in fact: in this case, we need to | |
77 | * subtract `INT64_MAX` from `value_ns_unsigned`, make | |
78 | * sure that the difference is less than `INT64_MAX`, | |
79 | * and try to add them one after the other to | |
80 | * `*ns_from_origin`. | |
81 | */ | |
82 | ret = -1; | |
83 | goto end; | |
84 | } | |
85 | ||
86 | value_ns_signed = (int64_t) value_ns_unsigned; | |
87 | BT_ASSERT(value_ns_signed >= 0); | |
88 | ||
89 | if (*ns_from_origin <= 0) { | |
90 | goto add_value; | |
91 | } | |
92 | ||
93 | if (value_ns_signed > INT64_MAX - *ns_from_origin) { | |
94 | ret = -1; | |
95 | goto end; | |
96 | } | |
97 | ||
98 | add_value: | |
99 | *ns_from_origin += value_ns_signed; | |
100 | ||
101 | end: | |
102 | return ret; | |
103 | } | |
104 | ||
105 | static inline | |
106 | bool bt_util_value_is_in_range_signed(uint64_t size, int64_t value) | |
107 | { | |
108 | int64_t min_value = UINT64_C(-1) << (size - 1); | |
109 | int64_t max_value = (UINT64_C(1) << (size - 1)) - 1; | |
110 | return value >= min_value && value <= max_value; | |
111 | } | |
112 | ||
113 | static inline | |
114 | bool bt_util_value_is_in_range_unsigned(unsigned int size, uint64_t value) | |
115 | { | |
116 | uint64_t max_value = (size == 64) ? UINT64_MAX : | |
117 | (UINT64_C(1) << size) - 1; | |
118 | return value <= max_value; | |
119 | } | |
bae99cf9 | 120 | |
108b91d0 | 121 | #endif /* BABELTRACE_TRACE_IR_UTILS_INTERNAL_H */ |