NAME

       qbutil.h - These are some convience functions used throughout libqb.

SYNOPSIS

       #include <qb/qbutil.h>

DESCRIPTION

       Locking

       Time functions

       Basic Stopwatch

       uint64_t elapsed1;
       uint64_t elapsed2;
       qb_util_stopwatch_t *sw = qb_util_stopwatch_create();

       qb_util_stopwatch_start(sw);

       usleep(sometime);
       qb_util_stopwatch_stop(sw);
       elapsed1 = qb_util_stopwatch_us_elapsed_get(sw);

       usleep(somemoretime);
       qb_util_stopwatch_stop(sw);
       elapsed2 = qb_util_stopwatch_us_elapsed_get(sw);

       qb_util_stopwatch_free(sw);

       Stopwatch with splits

       Setup a stopwatch with space for 3 splits.

       uint64_t split;
       qb_util_stopwatch_t *sw = qb_util_stopwatch_create();

       qb_util_stopwatch_split_ctl(sw, 3, 0);
       qb_util_stopwatch_start(sw);

       usleep(sometime);
       qb_util_stopwatch_split(sw);

       usleep(somemoretime);
       qb_util_stopwatch_split(sw);

       usleep(somemoretime);
       qb_util_stopwatch_split(sw);

       idx = qb_util_stopwatch_split_last(sw);
       do {
            split = qb_util_stopwatch_time_split_get(sw, idx, idx);
            qb_log(LOG_INFO, "split %d is %"PRIu64"", last, split);
            idx--;
       } while (split > 0);

       split = qb_util_stopwatch_time_split_get(sw, 2, 1);
       qb_log(LOG_INFO, "time between second and third split is %"PRIu64"", split);

       qb_util_stopwatch_free(sw);

SEE ALSO

       qb_util_nano_current_get(3), qb_util_stopwatch_stop(3), qb_util_stopwatch_split(3),
       qb_util_stopwatch_split_ctl(3), qb_thread_unlock(3), qb_strerror_r(3),
       qb_util_stopwatch_time_split_get(3), qb_util_set_log_function(3), qb_util_timespec_from_epoch_get(3),
       qb_thread_lock_destroy(3), qb_thread_trylock(3), qb_util_nano_monotonic_hz(3),
       qb_util_nano_from_epoch_get(3), qb_util_stopwatch_create(3), qb_util_stopwatch_split_last(3),
       qb_thread_lock(3), qb_util_stopwatch_free(3), qb_thread_lock_create(3), qb_timespec_add_ms(3),
       qb_util_stopwatch_start(3), qb_util_stopwatch_us_elapsed_get(3), qb_util_stopwatch_sec_elapsed_get(3)

COPYRIGHT

       Copyright (C) 2010-2020 Red Hat, Inc.

LIBQB                                              2023-07-21                                        QBUTIL.H(3)