From bffddffde7f9bd093909235a25dbb806fe639dde Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 22 Aug 2012 16:00:29 +0900 Subject: tools lib traceevent: Introduce pevent_errno Define and use error numbers for pevent_parse_event() and get rid of die() and do_warning() calls. If the function returns non-zero value, the caller can check the return code and do appropriate things. I chose the error numbers to be negative not to clash with standard errno, and as usual, 0 for success. Signed-off-by: Namhyung Kim Acked-by: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1345618831-9148-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.h | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) (limited to 'tools/lib/traceevent/event-parse.h') diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 5772ad8..3c48229 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -345,6 +345,28 @@ enum pevent_flag { PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */ }; +enum pevent_errno { + PEVENT_ERRNO__SUCCESS = 0, + + /* + * Choose an arbitrary negative big number not to clash with standard + * errno since SUS requires the errno has distinct positive values. + * See 'Issue 6' in the link below. + * + * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html + */ + __PEVENT_ERRNO__START = -100000, + + PEVENT_ERRNO__MEM_ALLOC_FAILED = __PEVENT_ERRNO__START, + PEVENT_ERRNO__PARSE_EVENT_FAILED, + PEVENT_ERRNO__READ_ID_FAILED, + PEVENT_ERRNO__READ_FORMAT_FAILED, + PEVENT_ERRNO__READ_PRINT_FAILED, + PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED, + + __PEVENT_ERRNO__END, +}; + struct cmdline; struct cmdline_list; struct func_map; @@ -509,8 +531,8 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s, int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size, int long_size); -int pevent_parse_event(struct pevent *pevent, const char *buf, - unsigned long size, const char *sys); +enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, + unsigned long size, const char *sys); void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event, const char *name, struct pevent_record *record, -- cgit v1.1