*
* Open a trace
*
- * Return: 0 on success, nonzero on failure.
+ * Return: the trace handle id (>= 0) on success, a negative
+ * value on error.
*/
int bt_context_add_trace(struct bt_context *ctx, const char *path,
const char *format);
struct trace_descriptor *td;
struct format *fmt;
struct bt_trace_handle *handle;
+ int ret;
fmt = bt_lookup_format(g_quark_from_string(format_str));
td = fmt->open_trace(path, O_RDONLY,
if (!td) {
fprintf(stderr, "[error] [Context] Cannot open_trace of the format %s .\n\n",
path);
- return -1;
+ ret = -1;
+ goto end;
}
/* Create an handle for the trace */
if (handle < 0) {
fprintf(stderr, "[error] [Context] Creating trace handle %s .\n\n",
path);
- return -1;
+ ret = -1;
+ goto end;
}
handle->format = fmt;
handle->td = td;
g_hash_table_insert(ctx->trace_handles,
(gpointer) (unsigned long) handle->id,
handle);
- return trace_collection_add(ctx->tc, td);
+ ret = trace_collection_add(ctx->tc, td);
+ if (ret == 0)
+ return handle->id;
+end:
+ return ret;
}
void bt_context_remove_trace(struct bt_context *ctx, int handle_id)