tags/lttv-0.10.0-pre15-12082008/ltt/marker.h

   1 #ifndef _LTT_MARKERS_H
   2 #define _LTT_MARKERS_H
   3
   4 /*
   5  * Marker support header.
   6  *
   7  * Mathieu Desnoyers, August 2007
   8  * License: LGPL.
   9  */
  10
  11 #include <glib.h>
  12 #include <ltt/trace.h>
  13 #include <ltt/compiler.h>
  14 #include <ltt/marker-field.h>
  15 #include <ltt/trace.h>
  16
  17 #define LTT_ATTRIBUTE_COMPACT (1<<0)
  18 #define LTT_ATTRIBUTE_NETWORK_BYTE_ORDER (1<<1)
  19
  20 /* static ids 0-7 reserved for internal use. */
  21 #define MARKER_CORE_IDS         8
  22 /* dynamic ids 8-127 reserved for compact events. */
  23 #define MARKER_COMPACT_IDS      128
  24
  25 struct marker_info;
  26
  27 struct marker_info {
  28   GQuark name;
  29   char *format;
  30   long size;       /* size if known statically, else -1 */
  31   GArray *fields;           /* Array of struct marker_field */
  32   guint8 int_size, long_size, pointer_size, size_t_size, alignment;
  33   struct marker_info *next; /* Linked list of markers with the same name */
  34 };
  35
  36 enum marker_id {
  37   MARKER_ID_SET_MARKER_ID = 0,  /* Static IDs available (range 0-7) */
  38   MARKER_ID_SET_MARKER_FORMAT,
  39   MARKER_ID_HEARTBEAT_32,
  40   MARKER_ID_HEARTBEAT_64,
  41   MARKER_ID_COMPACT,    /* Compact IDs (range: 8-127)      */
  42   MARKER_ID_DYNAMIC,    /* Dynamic IDs (range: 128-65535)   */
  43 };
  44
  45 static inline guint16 marker_get_id_from_info(LttTrace *trace,
  46     struct marker_info *info)
  47 {
  48   return ((unsigned long)info - (unsigned long)trace->markers->data)
  49            / sizeof(struct marker_info);
  50 }
  51
  52 static inline struct marker_info *marker_get_info_from_id(LttTrace *trace,
  53     guint16 id)
  54 {
  55   if (unlikely(trace->markers->len <= id))
  56     return NULL;
  57   return &g_array_index(trace->markers, struct marker_info, id);
  58 }
  59
  60 /*
  61  * Returns the head of the marker info list for that name.
  62  */
  63 static inline struct marker_info *marker_get_info_from_name(LttTrace *trace,
  64     GQuark name)
  65 {
  66   gpointer orig_key, value;
  67   int res;
  68
  69   res = g_hash_table_lookup_extended(trace->markers_hash,
  70     (gconstpointer)(gulong)name, &orig_key, &value);
  71   if (!res)
  72     return NULL;
  73   return marker_get_info_from_id(trace, (guint16)(gulong)value);
  74 }
  75
  76 static inline char *marker_get_format_from_name(LttTrace *trace,
  77     GQuark name)
  78 {
  79   gpointer orig_key, value;
  80   int res;
  81
  82   res = g_hash_table_lookup_extended(trace->markers_format_hash,
  83                 (gconstpointer)(gulong)name, &orig_key, &value);
  84   if (!res)
  85     return NULL;
  86   return (char *)value;
  87 }
  88
  89 static inline struct marker_field *marker_get_field(struct marker_info *info,
  90                                                         guint i)
  91 {
  92         return &g_array_index(info->fields, struct marker_field, i);
  93 }
  94
  95 static inline unsigned int marker_get_num_fields(struct marker_info *info)
  96 {
  97         return info->fields->len;
  98 }
  99
 100 /*
 101  * for_each_marker_field  -  iterate over fields of a marker
 102  * @field:      struct marker_field * to use as iterator
 103  * @info:       marker info pointer
 104  */
 105 #define for_each_marker_field(field, info)                              \
 106         for (field = marker_get_field(info, 0);                         \
 107                 field != marker_get_field(info, marker_get_num_fields(info)); \
 108                 field++)
 109
 110 int marker_format_event(LttTrace *trace, GQuark name, const char *format);
 111 int marker_id_event(LttTrace *trace, GQuark name, guint16 id,
 112   uint8_t int_size, uint8_t long_size, uint8_t pointer_size,
 113   uint8_t size_t_size, uint8_t alignment);
 114 int allocate_marker_data(LttTrace *trace);
 115 void destroy_marker_data(LttTrace *trace);
 116
 117 #endif //_LTT_MARKERS_H