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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | libtraceevent(3) ================ NAME ---- tep_set_flag, tep_clear_flag, tep_test_flag - Manage flags of trace event parser context. SYNOPSIS -------- [verse] -- *#include <event-parse.h>* enum *tep_flag* { _TEP_NSEC_OUTPUT_, _TEP_DISABLE_SYS_PLUGINS_, _TEP_DISABLE_PLUGINS_ }; void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); -- DESCRIPTION ----------- Trace event parser context flags are defined in *enum tep_flag*: [verse] -- _TEP_NSEC_OUTPUT_ - print event's timestamp in nano seconds, instead of micro seconds. _TEP_DISABLE_SYS_PLUGINS_ - disable plugins, located in system's plugin directory. This directory is defined at library compile time, and usually depends on library installation prefix: (install_preffix)/lib/traceevent/plugins _TEP_DISABLE_PLUGINS_ - disable all library plugins: - in system's plugin directory - in directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_ - in user's home directory, _~/.traceevent/plugins_ -- Note: plugin related flags must me set before calling _tep_load_plugins()_ API. The _tep_set_flag()_ function sets _flag_ to _tep_ context. The _tep_clear_flag()_ function clears _flag_ from _tep_ context. The _tep_test_flag()_ function tests if _flag_ is set to _tep_ context. RETURN VALUE ------------ _tep_test_flag()_ function returns true if _flag_ is set, false otherwise. EXAMPLE ------- [source,c] -- #include <event-parse.h> ... struct tep_handle *tep = tep_alloc(); ... /* Print timestamps in nanoseconds */ tep_set_flag(tep, TEP_NSEC_OUTPUT); ... if (tep_test_flag(tep, TEP_NSEC_OUTPUT)) { /* print timestamps in nanoseconds */ } else { /* print timestamps in microseconds */ } ... /* Print timestamps in microseconds */ tep_clear_flag(tep, TEP_NSEC_OUTPUT); ... -- FILES ----- [verse] -- *event-parse.h* Header file to include in order to have access to the library APIs. *-ltraceevent* Linker switch to add when building a program that uses the library. -- SEE ALSO -------- _libtraceevent(3)_, _trace-cmd(1)_ AUTHOR ------ [verse] -- *Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*. *Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page. -- REPORTING BUGS -------------- Report bugs to <linux-trace-devel@vger.kernel.org> LICENSE ------- libtraceevent is Free Software licensed under the GNU LGPL 2.1 RESOURCES --------- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git |