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Commit 20c7e5ab authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

tools lib traceevent: Add pevent_unregister_print_function() 



When a plugin unloaded it needs to unregister its print handler from
pevent.

So add an unregister function to do it.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Reviewed-by: default avatarJiri Olsa <jolsa@redhat.com>
Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1389839478-5887-3-git-send-email-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent ad13701d

tools/lib/traceevent/event-parse.c

+23 −0
Original line number Diff line number Diff line
@@ -5560,6 +5560,29 @@ int pevent_register_print_function(struct pevent *pevent, 
	return ret;

}



/**

 * pevent_unregister_print_function - unregister a helper function

 * @pevent: the handle to the pevent

 * @func: the function to process the helper function

 * @name: the name of the helper function

 *

 * This function removes existing print handler for function @name.

 *

 * Returns 0 if the handler was removed successully, -1 otherwise.

 */

int pevent_unregister_print_function(struct pevent *pevent,

				     pevent_func_handler func, char *name)

{

	struct pevent_function_handler *func_handle;



	func_handle = find_func_handler(pevent, name);

	if (func_handle && func_handle->func == func) {

		remove_func_handler(pevent, name);

		return 0;

	}

	return -1;

}



static struct event_format *pevent_search_event(struct pevent *pevent, int id,

						const char *sys_name,

						const char *event_name)

tools/lib/traceevent/event-parse.h

+2 −0
Original line number Diff line number Diff line
@@ -631,6 +631,8 @@ int pevent_register_print_function(struct pevent *pevent, 
				   pevent_func_handler func,

				   enum pevent_func_arg_type ret_type,

				   char *name, ...);

int pevent_unregister_print_function(struct pevent *pevent,

				     pevent_func_handler func, char *name);



struct format_field *pevent_find_common_field(struct event_format *event, const char *name);

struct format_field *pevent_find_field(struct event_format *event, const char *name);