1*4882a593Smuzhiyunlibtraceevent(3) 2*4882a593Smuzhiyun================ 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunNAME 5*4882a593Smuzhiyun---- 6*4882a593Smuzhiyuntep_set_flag, tep_clear_flag, tep_test_flag - 7*4882a593SmuzhiyunManage flags of trace event parser context. 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunSYNOPSIS 10*4882a593Smuzhiyun-------- 11*4882a593Smuzhiyun[verse] 12*4882a593Smuzhiyun-- 13*4882a593Smuzhiyun*#include <event-parse.h>* 14*4882a593Smuzhiyun 15*4882a593Smuzhiyunenum *tep_flag* { 16*4882a593Smuzhiyun _TEP_NSEC_OUTPUT_, 17*4882a593Smuzhiyun _TEP_DISABLE_SYS_PLUGINS_, 18*4882a593Smuzhiyun _TEP_DISABLE_PLUGINS_ 19*4882a593Smuzhiyun}; 20*4882a593Smuzhiyunvoid *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); 21*4882a593Smuzhiyunvoid *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); 22*4882a593Smuzhiyunbool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_); 23*4882a593Smuzhiyun-- 24*4882a593Smuzhiyun 25*4882a593SmuzhiyunDESCRIPTION 26*4882a593Smuzhiyun----------- 27*4882a593SmuzhiyunTrace event parser context flags are defined in *enum tep_flag*: 28*4882a593Smuzhiyun[verse] 29*4882a593Smuzhiyun-- 30*4882a593Smuzhiyun_TEP_NSEC_OUTPUT_ - print event's timestamp in nano seconds, instead of micro seconds. 31*4882a593Smuzhiyun_TEP_DISABLE_SYS_PLUGINS_ - disable plugins, located in system's plugin 32*4882a593Smuzhiyun directory. This directory is defined at library compile 33*4882a593Smuzhiyun time, and usually depends on library installation 34*4882a593Smuzhiyun prefix: (install_preffix)/lib/traceevent/plugins 35*4882a593Smuzhiyun_TEP_DISABLE_PLUGINS_ - disable all library plugins: 36*4882a593Smuzhiyun - in system's plugin directory 37*4882a593Smuzhiyun - in directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_ 38*4882a593Smuzhiyun - in user's home directory, _~/.traceevent/plugins_ 39*4882a593Smuzhiyun-- 40*4882a593SmuzhiyunNote: plugin related flags must me set before calling _tep_load_plugins()_ API. 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunThe _tep_set_flag()_ function sets _flag_ to _tep_ context. 43*4882a593Smuzhiyun 44*4882a593SmuzhiyunThe _tep_clear_flag()_ function clears _flag_ from _tep_ context. 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunThe _tep_test_flag()_ function tests if _flag_ is set to _tep_ context. 47*4882a593Smuzhiyun 48*4882a593SmuzhiyunRETURN VALUE 49*4882a593Smuzhiyun------------ 50*4882a593Smuzhiyun_tep_test_flag()_ function returns true if _flag_ is set, false otherwise. 51*4882a593Smuzhiyun 52*4882a593SmuzhiyunEXAMPLE 53*4882a593Smuzhiyun------- 54*4882a593Smuzhiyun[source,c] 55*4882a593Smuzhiyun-- 56*4882a593Smuzhiyun#include <event-parse.h> 57*4882a593Smuzhiyun... 58*4882a593Smuzhiyunstruct tep_handle *tep = tep_alloc(); 59*4882a593Smuzhiyun... 60*4882a593Smuzhiyun/* Print timestamps in nanoseconds */ 61*4882a593Smuzhiyuntep_set_flag(tep, TEP_NSEC_OUTPUT); 62*4882a593Smuzhiyun... 63*4882a593Smuzhiyunif (tep_test_flag(tep, TEP_NSEC_OUTPUT)) { 64*4882a593Smuzhiyun /* print timestamps in nanoseconds */ 65*4882a593Smuzhiyun} else { 66*4882a593Smuzhiyun /* print timestamps in microseconds */ 67*4882a593Smuzhiyun} 68*4882a593Smuzhiyun... 69*4882a593Smuzhiyun/* Print timestamps in microseconds */ 70*4882a593Smuzhiyuntep_clear_flag(tep, TEP_NSEC_OUTPUT); 71*4882a593Smuzhiyun... 72*4882a593Smuzhiyun-- 73*4882a593SmuzhiyunFILES 74*4882a593Smuzhiyun----- 75*4882a593Smuzhiyun[verse] 76*4882a593Smuzhiyun-- 77*4882a593Smuzhiyun*event-parse.h* 78*4882a593Smuzhiyun Header file to include in order to have access to the library APIs. 79*4882a593Smuzhiyun*-ltraceevent* 80*4882a593Smuzhiyun Linker switch to add when building a program that uses the library. 81*4882a593Smuzhiyun-- 82*4882a593Smuzhiyun 83*4882a593SmuzhiyunSEE ALSO 84*4882a593Smuzhiyun-------- 85*4882a593Smuzhiyun_libtraceevent(3)_, _trace-cmd(1)_ 86*4882a593Smuzhiyun 87*4882a593SmuzhiyunAUTHOR 88*4882a593Smuzhiyun------ 89*4882a593Smuzhiyun[verse] 90*4882a593Smuzhiyun-- 91*4882a593Smuzhiyun*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*. 92*4882a593Smuzhiyun*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page. 93*4882a593Smuzhiyun-- 94*4882a593SmuzhiyunREPORTING BUGS 95*4882a593Smuzhiyun-------------- 96*4882a593SmuzhiyunReport bugs to <linux-trace-devel@vger.kernel.org> 97*4882a593Smuzhiyun 98*4882a593SmuzhiyunLICENSE 99*4882a593Smuzhiyun------- 100*4882a593Smuzhiyunlibtraceevent is Free Software licensed under the GNU LGPL 2.1 101*4882a593Smuzhiyun 102*4882a593SmuzhiyunRESOURCES 103*4882a593Smuzhiyun--------- 104*4882a593Smuzhiyunhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 105