diff options
Diffstat (limited to 'trace/simple.c')
| -rw-r--r-- | trace/simple.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/trace/simple.c b/trace/simple.c index fc7106ec49..9cd2ed1fb3 100644 --- a/trace/simple.c +++ b/trace/simple.c @@ -302,10 +302,17 @@ static int st_write_event_mapping(void) return 0; } -void st_set_trace_file_enabled(bool enable) +/** + * Enable / disable tracing, return whether it was enabled. + * + * @enable: enable if %true, else disable. + */ +bool st_set_trace_file_enabled(bool enable) { + bool was_enabled = trace_fp; + if (enable == !!trace_fp) { - return; /* no change */ + return was_enabled; /* no change */ } /* Halt trace writeout */ @@ -323,14 +330,14 @@ void st_set_trace_file_enabled(bool enable) trace_fp = fopen(trace_file_name, "wb"); if (!trace_fp) { - return; + return was_enabled; } if (fwrite(&header, sizeof header, 1, trace_fp) != 1 || st_write_event_mapping() < 0) { fclose(trace_fp); trace_fp = NULL; - return; + return was_enabled; } /* Resume trace writeout */ @@ -340,6 +347,7 @@ void st_set_trace_file_enabled(bool enable) fclose(trace_fp); trace_fp = NULL; } + return was_enabled; } /** @@ -350,7 +358,7 @@ void st_set_trace_file_enabled(bool enable) */ void st_set_trace_file(const char *file) { - st_set_trace_file_enabled(false); + bool saved_enable = st_set_trace_file_enabled(false); g_free(trace_file_name); @@ -361,7 +369,7 @@ void st_set_trace_file(const char *file) trace_file_name = g_strdup_printf("%s", file); } - st_set_trace_file_enabled(true); + st_set_trace_file_enabled(saved_enable); } void st_print_trace_file_status(void) |