1QBUTIL.H(3) libqb Programmer's Manual QBUTIL.H(3)
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6 qbutil.h - These are some convience functions used throughout libqb.
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10 #include <qb/qbutil.h>
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13 Locking
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15 Time functions
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17 Basic Stopwatch
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19 uint64_t elapsed1;
20 uint64_t elapsed2;
21 qb_util_stopwatch_t *sw = qb_util_stopwatch_create();
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23 qb_util_stopwatch_start(sw);
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25 usleep(sometime);
26 qb_util_stopwatch_stop(sw);
27 elapsed1 = qb_util_stopwatch_us_elapsed_get(sw);
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29 usleep(somemoretime);
30 qb_util_stopwatch_stop(sw);
31 elapsed2 = qb_util_stopwatch_us_elapsed_get(sw);
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33 qb_util_stopwatch_free(sw);
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36 Stopwatch with splits
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38 Setup a stopwatch with space for 3 splits.
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40 uint64_t split;
41 qb_util_stopwatch_t *sw = qb_util_stopwatch_create();
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43 qb_util_stopwatch_split_ctl(sw, 3, 0);
44 qb_util_stopwatch_start(sw);
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46 usleep(sometime);
47 qb_util_stopwatch_split(sw);
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49 usleep(somemoretime);
50 qb_util_stopwatch_split(sw);
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52 usleep(somemoretime);
53 qb_util_stopwatch_split(sw);
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55 idx = qb_util_stopwatch_split_last(sw);
56 do {
57 split = qb_util_stopwatch_time_split_get(sw, idx, idx);
58 qb_log(LOG_INFO, "split %d is %"PRIu64"", last, split);
59 idx--;
60 } while (split > 0);
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62 split = qb_util_stopwatch_time_split_get(sw, 2, 1);
63 qb_log(LOG_INFO, "time between second and third split is %"PRIu64"", split);
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65 qb_util_stopwatch_free(sw);
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69 qb_util_nano_current_get(3), qb_util_stopwatch_stop(3),
70 qb_util_stopwatch_split(3), qb_util_stopwatch_split_ctl(3),
71 qb_thread_unlock(3), qb_strerror_r(3),
72 qb_util_stopwatch_time_split_get(3), qb_util_set_log_function(3),
73 qb_util_timespec_from_epoch_get(3), qb_thread_lock_destroy(3),
74 qb_thread_trylock(3), qb_util_nano_monotonic_hz(3),
75 qb_util_nano_from_epoch_get(3), qb_util_stopwatch_create(3),
76 qb_util_stopwatch_split_last(3), qb_thread_lock(3),
77 qb_util_stopwatch_free(3), qb_thread_lock_create(3),
78 qb_timespec_add_ms(3), qb_util_stopwatch_start(3),
79 qb_util_stopwatch_us_elapsed_get(3),
80 qb_util_stopwatch_sec_elapsed_get(3)
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83 Copyright (C) 2010-2020 Red Hat, Inc.
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87LIBQB 2023-07-21 QBUTIL.H(3)