From 20c7e5abbd0cdfaa656f46af052a6e6a8ce94775 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Thu, 16 Jan 2014 11:31:08 +0900 Subject: [PATCH] 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: Namhyung Kim Reviewed-by: Jiri Olsa Acked-by: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1389839478-5887-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 23 +++++++++++++++++++++++ tools/lib/traceevent/event-parse.h | 2 ++ 2 files changed, 25 insertions(+) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index d1973cb8388b..1587ea392ad6 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -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) diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index c48acfbc6230..791c539374c7 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -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); -- 2.34.1