| 1 | #ifndef BABELTRACE_TRACE_IR_UTILS_INTERNAL_H |
| 2 | #define BABELTRACE_TRACE_IR_UTILS_INTERNAL_H |
| 3 | |
| 4 | /* |
| 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> |
| 25 | #include <babeltrace/trace-ir/field-classes.h> |
| 26 | #include <babeltrace/trace-ir/clock-class-internal.h> |
| 27 | #include <stdint.h> |
| 28 | |
| 29 | struct search_query { |
| 30 | gpointer value; |
| 31 | int found; |
| 32 | }; |
| 33 | |
| 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 |
| 56 | int bt_util_ns_from_origin(const struct bt_clock_class *clock_class, |
| 57 | uint64_t value, int64_t *ns_from_origin) |
| 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 | } |
| 120 | |
| 121 | #endif /* BABELTRACE_TRACE_IR_UTILS_INTERNAL_H */ |