move lttv to root

[lttv.git] / ltt / marker.h

diff --git a/ltt/marker.h b/ltt/marker.h
new file mode 100644 (file)
index 0000000..3a84749
--- /dev/null
+++ b/ltt/marker.h
@@ -0,0 +1,122 @@
+#ifndef _LTT_MARKERS_H
+#define _LTT_MARKERS_H
+
+/*
+ * Marker support header.
+ *
+ * Mathieu Desnoyers, August 2007
+ * License: LGPL.
+ */
+
+#include <glib.h>
+#include <ltt/trace.h>
+#include <ltt/compiler.h>
+#include <ltt/marker-field.h>
+#include <ltt/trace.h>
+
+#define LTT_ATTRIBUTE_NETWORK_BYTE_ORDER (1<<1)
+
+/* static ids 0-7 reserved for internal use. */
+#define MARKER_CORE_IDS         8
+
+struct marker_info;
+
+struct marker_info {
+  GQuark name;
+  char *format;
+  long size;         /* size if known statically, else -1 */
+  guint8 largest_align; /* Size of the largest alignment needed in the
+                           payload. */
+  GArray *fields;    /* Array of struct marker_field */
+  guint8 int_size, long_size, pointer_size, size_t_size;
+  guint8 alignment;  /* Size on which the architecture alignment must be
+                        done. Useful to encapsulate x86_32 events on
+                       x86_64 kernels. */
+  struct marker_info *next; /* Linked list of markers with the same name */
+};
+
+struct marker_data {
+  GArray *markers;                     //indexed by marker id
+  GHashTable *markers_hash;            //indexed by name hash
+  GHashTable *markers_format_hash;     //indexed by name hash
+};
+
+enum marker_id {
+  MARKER_ID_SET_MARKER_ID = 0,  /* Static IDs available (range 0-7) */
+  MARKER_ID_SET_MARKER_FORMAT,
+};
+
+static inline guint16 marker_get_id_from_info(struct marker_data *data,
+    struct marker_info *info)
+{
+  return ((unsigned long)info - (unsigned long)data->markers->data)
+           / sizeof(struct marker_info);
+}
+
+static inline struct marker_info *marker_get_info_from_id(
+    struct marker_data *data, guint16 id)
+{
+  if (unlikely(data->markers->len <= id))
+    return NULL;
+  return &g_array_index(data->markers, struct marker_info, id);
+}
+
+/*
+ * Returns the head of the marker info list for that name.
+ */
+static inline struct marker_info *marker_get_info_from_name(
+    struct marker_data *data, GQuark name)
+{
+  gpointer orig_key, value;
+  int res;
+
+  res = g_hash_table_lookup_extended(data->markers_hash,
+    (gconstpointer)(gulong)name, &orig_key, &value);
+  if (!res)
+    return NULL;
+  return marker_get_info_from_id(data, (guint16)(gulong)value);
+}
+
+static inline char *marker_get_format_from_name(struct marker_data *data,
+    GQuark name)
+{
+  gpointer orig_key, value;
+  int res;
+
+  res = g_hash_table_lookup_extended(data->markers_format_hash,
+               (gconstpointer)(gulong)name, &orig_key, &value);
+  if (!res)
+    return NULL;
+  return (char *)value;
+}
+
+static inline struct marker_field *marker_get_field(struct marker_info *info,
+                                                       guint i)
+{
+       return &g_array_index(info->fields, struct marker_field, i);
+}
+
+static inline unsigned int marker_get_num_fields(struct marker_info *info)
+{
+       return info->fields->len;
+}
+
+/*
+ * for_each_marker_field  -  iterate over fields of a marker
+ * @field:      struct marker_field * to use as iterator
+ * @info:       marker info pointer
+ */
+#define for_each_marker_field(field, info)                             \
+       for (field = marker_get_field(info, 0);                         \
+               field != marker_get_field(info, marker_get_num_fields(info)); \
+               field++)
+
+int marker_format_event(LttTrace *trace, GQuark channel, GQuark name,
+  const char *format);
+int marker_id_event(LttTrace *trace, GQuark channel, GQuark name, guint16 id,
+  uint8_t int_size, uint8_t long_size, uint8_t pointer_size,
+  uint8_t size_t_size, uint8_t alignment);
+struct marker_data *allocate_marker_data(void);
+void destroy_marker_data(struct marker_data *data);
+
+#endif //_LTT_MARKERS_H