Handle negative time and offset from Epoch

[babeltrace.git] / lib / trace-handle.c

diff --git a/lib/trace-handle.c b/lib/trace-handle.c
index d5b906aa961f5639b51f9a7c9114a19c28f58f3a..b768a080147ff39db176cce173adc4f01c1cbab5 100644 (file)
--- a/lib/trace-handle.c
+++ b/lib/trace-handle.c
@@ -66,54 +66,56 @@ const char *bt_trace_handle_get_path(struct bt_context *ctx, int handle_id)
        return handle->path;
 }
 
-uint64_t bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
-               int handle_id, enum bt_clock_type type)
+int bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
+               int handle_id, enum bt_clock_type type,
+               int64_t *timestamp)
 {
        struct bt_trace_handle *handle;
-       uint64_t ret;
+       int ret = 0;
 
-       if (!ctx)
-               return -1ULL;
+       if (!ctx || !timestamp)
+               return -1;
 
        handle = g_hash_table_lookup(ctx->trace_handles,
                        (gpointer) (unsigned long) handle_id);
        if (!handle) {
-               ret = -1ULL;
+               ret = -1;
                goto end;
        }
        if (type == BT_CLOCK_REAL) {
-               ret = handle->real_timestamp_begin;
+               *timestamp = handle->real_timestamp_begin;
        } else if (type == BT_CLOCK_CYCLES) {
-               ret = handle->cycles_timestamp_begin;
+               *timestamp = handle->cycles_timestamp_begin;
        } else {
-               ret = -1ULL;
+               ret = -1;
        }
 
 end:
        return ret;
 }
 
-uint64_t bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
-               int handle_id, enum bt_clock_type type)
+int bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
+               int handle_id, enum bt_clock_type type,
+               int64_t *timestamp)
 {
        struct bt_trace_handle *handle;
-       uint64_t ret;
+       int ret = 0;
 
-       if (!ctx)
-               return -1ULL;
+       if (!ctx || !timestamp)
+               return -1;
 
        handle = g_hash_table_lookup(ctx->trace_handles,
                        (gpointer) (unsigned long) handle_id);
        if (!handle) {
-               ret = -1ULL;
+               ret = -1;
                goto end;
        }
        if (type == BT_CLOCK_REAL) {
-               ret = handle->real_timestamp_end;
+               *timestamp = handle->real_timestamp_end;
        } else if (type == BT_CLOCK_CYCLES) {
-               ret = handle->cycles_timestamp_end;
+               *timestamp = handle->cycles_timestamp_end;
        } else {
-               ret = -1ULL;
+               ret = -1;
        }
 
 end: