[lttv.git] / ltt / branches / poly / ltt / ltt-private.h

/* This file is part of the Linux Trace Toolkit viewer
 * Copyright (C) 2003-2004 Xiangxiu Yang
 *               2006 Mathieu Desnoyers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License Version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef LTT_PRIVATE_H
#define LTT_PRIVATE_H

#include <glib.h>
#include <sys/types.h>
#include <ltt/ltt.h>
#include <endian.h>


#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif

#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif


#define LTT_MAGIC_NUMBER 0x00D6B7ED
#define LTT_REV_MAGIC_NUMBER 0xEDB7D600

#define NSEC_PER_USEC 1000

#define LTT_PACKED_STRUCT __attribute__ ((packed))

/* Hardcoded facilities */
#define LTT_FACILITY_CORE 0
 
/* Byte ordering */
#define LTT_GET_BO(t) ((t)->reverse_bo)

#define LTT_HAS_FLOAT(t) ((t)->float_word_order!=0)
#define LTT_GET_FLOAT_BO(t) \
  (((t)->float_word_order==__BYTE_ORDER)?0:1)

#define SEQUENCE_AVG_ELEMENTS 1000
                               
/* Hardcoded core events */
enum ltt_core_events {
    LTT_EVENT_FACILITY_LOAD,
    LTT_EVENT_FACILITY_UNLOAD,
    LTT_EVENT_HEARTBEAT,
    LTT_EVENT_STATE_DUMP_FACILITY_LOAD
};


#if 0
/* enumeration definition */

typedef enum _BuildinEvent{
  TRACE_FACILITY_LOAD = 0,
  TRACE_BLOCK_START   = 17,
  TRACE_BLOCK_END     = 18,
  TRACE_TIME_HEARTBEAT= 19
} BuildinEvent;


/* structure definition */

typedef struct _FacilityLoad{
  gchar * name;
  LttChecksum checksum;
  guint32     base_code;
} LTT_PACKED_STRUCT FacilityLoad;

typedef struct _BlockStart {
  LttTime       time;       //Time stamp of this block
  LttCycleCount cycle_count; //cycle count of the event
  guint32       block_id;    //block id 
} LTT_PACKED_STRUCT BlockStart;

typedef struct _BlockEnd {
  LttTime       time;       //Time stamp of this block
  LttCycleCount cycle_count; //cycle count of the event
  guint32       block_id;    //block id 
} LTT_PACKED_STRUCT BlockEnd;
#endif //0


typedef guint8 uint8_t;
typedef guint16 uint16_t;
typedef guint32 uint32_t;
typedef guint64 uint64_t;

/* Hardcoded facility load event : this plus an preceding "name" string */
struct LttFacilityLoad {
  guint32 checksum;
  guint32 id;
	guint32 int_size;
  guint32 long_size;
  guint32 pointer_size;
  guint32 size_t_size;
	guint32 has_alignment;
} LTT_PACKED_STRUCT;

struct LttFacilityUnload {
  guint32 id;
} LTT_PACKED_STRUCT;

struct LttStateDumpFacilityLoad {
  guint32 checksum;
  guint32 id;
	guint32 int_size;
  guint32 long_size;
  guint32 pointer_size;
  guint32 size_t_size;
	guint32	has_alignment;
} LTT_PACKED_STRUCT;

typedef struct _TimeHeartbeat {
  LttTime       time;       //Time stamp of this block
  uint64_t cycle_count; //cycle count of the event
} LTT_PACKED_STRUCT TimeHeartbeat;

struct ltt_event_header_hb {
  uint32_t      timestamp;
  unsigned char  facility_id;
  unsigned char event_id;
  uint16_t      event_size;
} LTT_PACKED_STRUCT;

struct ltt_event_header_nohb {
  uint64_t      timestamp;
  unsigned char  facility_id;
  unsigned char event_id;
  uint16_t      event_size;
} LTT_PACKED_STRUCT;


/* Block and trace headers */

struct ltt_trace_header_any {
  uint32_t        magic_number;
  uint32_t        arch_type;
  uint32_t        arch_variant;
  uint32_t        float_word_order;
  uint8_t         arch_size;
  uint8_t         major_version;
  uint8_t         minor_version;
  uint8_t         flight_recorder;
  uint8_t         has_heartbeat;
  uint8_t         has_alignment;  /* Event header alignment */
	uint32_t			  freq_scale;
} LTT_PACKED_STRUCT;


/* For version 0.3 */

struct ltt_trace_header_0_3 {
  uint32_t        magic_number;
  uint32_t        arch_type;
  uint32_t        arch_variant;
  uint32_t        float_word_order;
  uint8_t         arch_size;
  uint8_t         major_version;
  uint8_t         minor_version;
  uint8_t         flight_recorder;
  uint8_t         has_heartbeat;
  uint8_t         has_alignment;  /* Event header alignment */
	uint32_t				freq_scale;
} LTT_PACKED_STRUCT;

/* For version 0.7 */

struct ltt_trace_header_0_7 {
  uint32_t        magic_number;
  uint32_t        arch_type;
  uint32_t        arch_variant;
  uint32_t        float_word_order;
  uint8_t         arch_size;
  uint8_t         major_version;
  uint8_t         minor_version;
  uint8_t         flight_recorder;
  uint8_t         has_heartbeat;
  uint8_t         has_alignment;  /* Event header alignment */
  uint32_t        freq_scale;
  uint64_t        start_freq;
  uint64_t        start_tsc;
  uint64_t        start_monotonic;
  uint64_t        start_time_sec;
  uint64_t        start_time_usec;
} LTT_PACKED_STRUCT;


struct ltt_block_start_header {
  struct { 
    uint64_t                cycle_count;
    uint64_t                freq;
  } begin;
  struct {
    uint64_t                cycle_count;
    uint64_t                freq;
  } end;
  uint32_t                lost_size;  /* Size unused at the end of the buffer */
  uint32_t                buf_size;   /* The size of this sub-buffer */
  struct ltt_trace_header_any trace[0];
} LTT_PACKED_STRUCT;


struct _LttType{
// LTTV does not care about type names. Everything is a field.
// GQuark type_name;                //type name if it is a named type
  gchar * fmt;
  guint size;
  LttTypeEnum type_class;          //which type
  GHashTable *enum_map;                 //maps enum labels to numbers.
  GArray *fields;     // Array of LttFields, for array, sequence, union, struct.
  GData *fields_by_name;
};

struct _LttEventType{
  GQuark name;
  gchar * description;
  guint index;            //id of the event type within the facility
  LttFacility * facility; //the facility that contains the event type
  GArray * fields;        //event's fields (LttField)
  GData *fields_by_name;
};

/* Structure LttEvent and LttEventPosition must begin with the _exact_ same
 * fields in the exact same order. LttEventPosition is a parent of LttEvent. */
struct _LttEvent{
  
  /* Begin of LttEventPosition fields */
  LttTracefile  *tracefile;
  unsigned int  block;
  unsigned int  offset;

  /* Timekeeping */
  uint64_t                tsc;       /* Current timestamp counter */
  
  /* End of LttEventPosition fields */

  guint32  timestamp;				/* truncated timestamp */

  unsigned char facility_id;	/* facility ID are never reused. */
  unsigned char event_id;

  LttTime event_time;

  void * data;               //event data
  guint  data_size;
  guint  event_size;         //event_size field of the header : 
                             //used to verify data_size from facility.

  int      count;                    //the number of overflow of cycle count
  gint64 overflow_nsec;              //precalculated nsec for overflows
};

struct _LttEventPosition{
  LttTracefile  *tracefile;
  unsigned int  block;
  unsigned int  offset;
  
  /* Timekeeping */
  uint64_t                tsc;       /* Current timestamp counter */
};


enum field_status { FIELD_UNKNOWN, FIELD_VARIABLE, FIELD_FIXED };

struct _LttField{
  GQuark name;
  gchar *description;
  LttType field_type;      //field type

  off_t offset_root;            //offset from the root
  enum field_status fixed_root; //offset fixed according to the root

  guint field_size;       // size of the field
                          // Only if field type size is set to 0
                          // (it's variable), then the field_size should be
                          // dynamically calculated while reading the trace
                          // and put here. Otherwise, the field_size always
                          // equels the type size.
  off_t array_offset;     // offset of the beginning of the array (for array
                          // and sequences)
  GArray * dynamic_offsets; // array of offsets calculated dynamically at
                            // each event for sequences and arrays that
                            // contain variable length fields.
};

struct _LttFacility{
  LttTrace  *trace;
  GQuark name;
  guint32 checksum;      //checksum of the facility 
  guint32  id;          //id of the facility
 
  guint32 int_size;
  guint32 long_size;
  guint32 pointer_size;
  guint32 size_t_size;
  guint32 alignment;

  GArray *events;
  GData *events_by_name;
 // not necessary in LTTV GData *named_types;
  
  unsigned char exists; /* 0 does not exist, 1 exists */
};

typedef struct _LttBuffer {
  void * head;
  unsigned int index;

  struct {
    LttTime                 timestamp;
    uint64_t                cycle_count;
    uint64_t                freq; /* Frequency in khz */
  } begin;
  struct {
    LttTime                 timestamp;
    uint64_t                cycle_count;
    uint64_t                freq; /* Frequency in khz */
  } end;
  uint32_t                lost_size; /* Size unused at the end of the buffer */

  /* Timekeeping */
  uint64_t                tsc;       /* Current timestamp counter */
  uint64_t                freq; /* Frequency in khz */
  //double                  nsecs_per_cycle;  /* Precalculated from freq */
  guint32                 cyc2ns_scale;
} LttBuffer;

struct _LttTracefile{
  gboolean cpu_online;               //is the cpu online ?
  GQuark long_name;                  //tracefile complete filename
  GQuark name;                       //tracefile name
  guint cpu_num;                     //cpu number of the tracefile
  LttTrace * trace;                  //trace containing the tracefile
  int fd;                            //file descriptor 
  off_t file_size;                   //file size
  //unsigned block_size;               //block_size
  guint num_blocks;           //number of blocks in the file
  gboolean  reverse_bo;              //must we reverse byte order ?
  gboolean  float_word_order;        //what is the byte order of floats ?
	size_t		has_alignment;					 //alignment of events in the tracefile.
																		 // 0 or the architecture size in bytes.

  size_t    buffer_header_size;

	/* Current event */
  LttEvent event;                    //Event currently accessible in the trace

	/* Current block */
  LttBuffer buffer;                  //current buffer
  guint32 buf_size;                  /* The size of blocks */

	/* Time flow */
  //unsigned int      count;           //the number of overflow of cycle count
  //double nsec_per_cycle;             //Nsec per cycle
  //TimeHeartbeat * last_heartbeat;    //last heartbeat

  //LttCycleCount cycles_per_nsec_reciprocal; // Optimisation for speed
  //void * last_event_pos;

  //LttTime prev_block_end_time;       //the end time of previous block
  //LttTime prev_event_time;           //the time of the previous event
  //LttCycleCount pre_cycle_count;     //previous cycle count of the event
};

struct _LttTrace{
  GQuark pathname;                          //the pathname of the trace
  //LttSystemDescription * system_description;//system description 

  GArray *facilities_by_num;            /* fac_id as index in array */
  GData *facilities_by_name;            /* fac name (GQuark) as index */
                                        /* Points to array of fac_id of all the
                                        * facilities that has this name. */
  guint     num_cpu;

  guint32   arch_type;
  guint32   arch_variant;
  guint8    arch_size;
  guint8    ltt_major_version;
  guint8    ltt_minor_version;
  guint8    flight_recorder;
  guint8    has_heartbeat;
	guint32		freq_scale;
  uint64_t  start_freq;
  uint64_t  start_tsc;
  uint64_t  start_monotonic;
  LttTime   start_time;
  LttTime   start_time_from_tsc;

  GData     *tracefiles;                    //tracefiles groups
};

/* The characteristics of the system on which the trace was obtained
   is described in a LttSystemDescription structure. */

struct _LttSystemDescription {
  gchar *description;
  gchar *node_name;
  gchar *domain_name;
  unsigned nb_cpu;
  LttArchSize size;
  LttArchEndian endian;
  gchar *kernel_name;
  gchar *kernel_release;
  gchar *kernel_version;
  gchar *machine;
  gchar *processor;
  gchar *hardware_platform;
  gchar *operating_system;
  LttTime trace_start;
  LttTime trace_end;
};

/*****************************************************************************
 macro for size of some data types
 *****************************************************************************/
// alignment -> dynamic!

//#define TIMESTAMP_SIZE    sizeof(guint32)
//#define EVENT_ID_SIZE     sizeof(guint16)
//#define EVENT_HEADER_SIZE (TIMESTAMP_SIZE + EVENT_ID_SIZE)


/* Calculate the offset needed to align the type.
 * If has_alignment is 0, alignment is disactivated.
 * else, the function returns the offset needed to
 * align align_drift on the has_alignment value (should be
 * the size of the architecture). */
static inline unsigned int ltt_align(size_t align_drift,
																		 size_t size_of_type,
																		 size_t has_alignment)
{
	size_t alignment = min(has_alignment, size_of_type);
	
	if(!has_alignment) return 0;
	
	return ((alignment - align_drift) & (alignment-1));
}


#endif /* LTT_PRIVATE_H */
Commit	Line	Data
	1	/* This file is part of the Linux Trace Toolkit viewer
	2	* Copyright (C) 2003-2004 Xiangxiu Yang
	3	* 2006 Mathieu Desnoyers
	4	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License Version 2.1 as published by the Free Software Foundation.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Lesser General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Lesser General Public
	15	* License along with this library; if not, write to the
	16	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	* Boston, MA 02111-1307, USA.
	18	*/
	19
	20	#ifndef LTT_PRIVATE_H
	21	#define LTT_PRIVATE_H
	22
	23	#include <glib.h>
	24	#include <sys/types.h>
	25	#include <ltt/ltt.h>
	26	#include <endian.h>
	27
	28
	29	#ifndef max
	30	#define max(a,b) ((a)>(b)?(a):(b))
	31	#endif
	32
	33	#ifndef min
	34	#define min(a,b) ((a)<(b)?(a):(b))
	35	#endif
	36
	37
	38
	39	#define LTT_MAGIC_NUMBER 0x00D6B7ED
	40	#define LTT_REV_MAGIC_NUMBER 0xEDB7D600
	41
	42	#define NSEC_PER_USEC 1000
	43
	44	#define LTT_PACKED_STRUCT __attribute__ ((packed))
	45
	46	/* Hardcoded facilities */
	47	#define LTT_FACILITY_CORE 0
	48
	49	/* Byte ordering */
	50	#define LTT_GET_BO(t) ((t)->reverse_bo)
	51
	52	#define LTT_HAS_FLOAT(t) ((t)->float_word_order!=0)
	53	#define LTT_GET_FLOAT_BO(t) \
	54	(((t)->float_word_order==__BYTE_ORDER)?0:1)
	55
	56	#define SEQUENCE_AVG_ELEMENTS 1000
	57
	58	/* Hardcoded core events */
	59	enum ltt_core_events {
	60	LTT_EVENT_FACILITY_LOAD,
	61	LTT_EVENT_FACILITY_UNLOAD,
	62	LTT_EVENT_HEARTBEAT,
	63	LTT_EVENT_STATE_DUMP_FACILITY_LOAD
	64	};
	65
	66
	67	#if 0
	68	/* enumeration definition */
	69
	70	typedef enum _BuildinEvent{
	71	TRACE_FACILITY_LOAD = 0,
	72	TRACE_BLOCK_START = 17,
	73	TRACE_BLOCK_END = 18,
	74	TRACE_TIME_HEARTBEAT= 19
	75	} BuildinEvent;
	76
	77
	78	/* structure definition */
	79
	80	typedef struct _FacilityLoad{
	81	gchar * name;
	82	LttChecksum checksum;
	83	guint32 base_code;
	84	} LTT_PACKED_STRUCT FacilityLoad;
	85
	86	typedef struct _BlockStart {
	87	LttTime time; //Time stamp of this block
	88	LttCycleCount cycle_count; //cycle count of the event
	89	guint32 block_id; //block id
	90	} LTT_PACKED_STRUCT BlockStart;
	91
	92	typedef struct _BlockEnd {
	93	LttTime time; //Time stamp of this block
	94	LttCycleCount cycle_count; //cycle count of the event
	95	guint32 block_id; //block id
	96	} LTT_PACKED_STRUCT BlockEnd;
	97	#endif //0
	98
	99
	100	typedef guint8 uint8_t;
	101	typedef guint16 uint16_t;
	102	typedef guint32 uint32_t;
	103	typedef guint64 uint64_t;
	104
	105	/* Hardcoded facility load event : this plus an preceding "name" string */
	106	struct LttFacilityLoad {
	107	guint32 checksum;
	108	guint32 id;
	109	guint32 int_size;
	110	guint32 long_size;
	111	guint32 pointer_size;
	112	guint32 size_t_size;
	113	guint32 has_alignment;
	114	} LTT_PACKED_STRUCT;
	115
	116	struct LttFacilityUnload {
	117	guint32 id;
	118	} LTT_PACKED_STRUCT;
	119
	120	struct LttStateDumpFacilityLoad {
	121	guint32 checksum;
	122	guint32 id;
	123	guint32 int_size;
	124	guint32 long_size;
	125	guint32 pointer_size;
	126	guint32 size_t_size;
	127	guint32 has_alignment;
	128	} LTT_PACKED_STRUCT;
	129
	130	typedef struct _TimeHeartbeat {
	131	LttTime time; //Time stamp of this block
	132	uint64_t cycle_count; //cycle count of the event
	133	} LTT_PACKED_STRUCT TimeHeartbeat;
	134
	135	struct ltt_event_header_hb {
	136	uint32_t timestamp;
	137	unsigned char facility_id;
	138	unsigned char event_id;
	139	uint16_t event_size;
	140	} LTT_PACKED_STRUCT;
	141
	142	struct ltt_event_header_nohb {
	143	uint64_t timestamp;
	144	unsigned char facility_id;
	145	unsigned char event_id;
	146	uint16_t event_size;
	147	} LTT_PACKED_STRUCT;
	148
	149
	150	/* Block and trace headers */
	151
	152	struct ltt_trace_header_any {
	153	uint32_t magic_number;
	154	uint32_t arch_type;
	155	uint32_t arch_variant;
	156	uint32_t float_word_order;
	157	uint8_t arch_size;
	158	uint8_t major_version;
	159	uint8_t minor_version;
	160	uint8_t flight_recorder;
	161	uint8_t has_heartbeat;
	162	uint8_t has_alignment; /* Event header alignment */
	163	uint32_t freq_scale;
	164	} LTT_PACKED_STRUCT;
	165
	166
	167	/* For version 0.3 */
	168
	169	struct ltt_trace_header_0_3 {
	170	uint32_t magic_number;
	171	uint32_t arch_type;
	172	uint32_t arch_variant;
	173	uint32_t float_word_order;
	174	uint8_t arch_size;
	175	uint8_t major_version;
	176	uint8_t minor_version;
	177	uint8_t flight_recorder;
	178	uint8_t has_heartbeat;
	179	uint8_t has_alignment; /* Event header alignment */
	180	uint32_t freq_scale;
	181	} LTT_PACKED_STRUCT;
	182
	183	/* For version 0.7 */
	184
	185	struct ltt_trace_header_0_7 {
	186	uint32_t magic_number;
	187	uint32_t arch_type;
	188	uint32_t arch_variant;
	189	uint32_t float_word_order;
	190	uint8_t arch_size;
	191	uint8_t major_version;
	192	uint8_t minor_version;
	193	uint8_t flight_recorder;
	194	uint8_t has_heartbeat;
	195	uint8_t has_alignment; /* Event header alignment */
	196	uint32_t freq_scale;
	197	uint64_t start_freq;
	198	uint64_t start_tsc;
	199	uint64_t start_monotonic;
	200	uint64_t start_time_sec;
	201	uint64_t start_time_usec;
	202	} LTT_PACKED_STRUCT;
	203
	204
	205	struct ltt_block_start_header {
	206	struct {
	207	uint64_t cycle_count;
	208	uint64_t freq;
	209	} begin;
	210	struct {
	211	uint64_t cycle_count;
	212	uint64_t freq;
	213	} end;
	214	uint32_t lost_size; /* Size unused at the end of the buffer */
	215	uint32_t buf_size; /* The size of this sub-buffer */
	216	struct ltt_trace_header_any trace[0];
	217	} LTT_PACKED_STRUCT;
	218
	219
	220	struct _LttType{
	221	// LTTV does not care about type names. Everything is a field.
	222	// GQuark type_name; //type name if it is a named type
	223	gchar * fmt;
	224	guint size;
	225	LttTypeEnum type_class; //which type
	226	GHashTable *enum_map; //maps enum labels to numbers.
	227	GArray *fields; // Array of LttFields, for array, sequence, union, struct.
	228	GData *fields_by_name;
	229	};
	230
	231	struct _LttEventType{
	232	GQuark name;
	233	gchar * description;
	234	guint index; //id of the event type within the facility
	235	LttFacility * facility; //the facility that contains the event type
	236	GArray * fields; //event's fields (LttField)
	237	GData *fields_by_name;
	238	};
	239
	240	/* Structure LttEvent and LttEventPosition must begin with the _exact_ same
	241	* fields in the exact same order. LttEventPosition is a parent of LttEvent. */
	242	struct _LttEvent{
	243
	244	/* Begin of LttEventPosition fields */
	245	LttTracefile *tracefile;
	246	unsigned int block;
	247	unsigned int offset;
	248
	249	/* Timekeeping */
	250	uint64_t tsc; /* Current timestamp counter */
	251
	252	/* End of LttEventPosition fields */
	253
	254	guint32 timestamp; /* truncated timestamp */
	255
	256	unsigned char facility_id; /* facility ID are never reused. */
	257	unsigned char event_id;
	258
	259	LttTime event_time;
	260
	261	void * data; //event data
	262	guint data_size;
	263	guint event_size; //event_size field of the header :
	264	//used to verify data_size from facility.
	265
	266	int count; //the number of overflow of cycle count
	267	gint64 overflow_nsec; //precalculated nsec for overflows
	268	};
	269
	270	struct _LttEventPosition{
	271	LttTracefile *tracefile;
	272	unsigned int block;
	273	unsigned int offset;
	274
	275	/* Timekeeping */
	276	uint64_t tsc; /* Current timestamp counter */
	277	};
	278
	279
	280	enum field_status { FIELD_UNKNOWN, FIELD_VARIABLE, FIELD_FIXED };
	281
	282	struct _LttField{
	283	GQuark name;
	284	gchar *description;
	285	LttType field_type; //field type
	286
	287	off_t offset_root; //offset from the root
	288	enum field_status fixed_root; //offset fixed according to the root
	289
	290	guint field_size; // size of the field
	291	// Only if field type size is set to 0
	292	// (it's variable), then the field_size should be
	293	// dynamically calculated while reading the trace
	294	// and put here. Otherwise, the field_size always
	295	// equels the type size.
	296	off_t array_offset; // offset of the beginning of the array (for array
	297	// and sequences)
	298	GArray * dynamic_offsets; // array of offsets calculated dynamically at
	299	// each event for sequences and arrays that
	300	// contain variable length fields.
	301	};
	302
	303	struct _LttFacility{
	304	LttTrace *trace;
	305	GQuark name;
	306	guint32 checksum; //checksum of the facility
	307	guint32 id; //id of the facility
	308
	309	guint32 int_size;
	310	guint32 long_size;
	311	guint32 pointer_size;
	312	guint32 size_t_size;
	313	guint32 alignment;
	314
	315	GArray *events;
	316	GData *events_by_name;
	317	// not necessary in LTTV GData *named_types;
	318
	319	unsigned char exists; /* 0 does not exist, 1 exists */
	320	};
	321
	322	typedef struct _LttBuffer {
	323	void * head;
	324	unsigned int index;
	325
	326	struct {
	327	LttTime timestamp;
	328	uint64_t cycle_count;
	329	uint64_t freq; /* Frequency in khz */
	330	} begin;
	331	struct {
	332	LttTime timestamp;
	333	uint64_t cycle_count;
	334	uint64_t freq; /* Frequency in khz */
	335	} end;
	336	uint32_t lost_size; /* Size unused at the end of the buffer */
	337
	338	/* Timekeeping */
	339	uint64_t tsc; /* Current timestamp counter */
	340	uint64_t freq; /* Frequency in khz */
	341	//double nsecs_per_cycle; /* Precalculated from freq */
	342	guint32 cyc2ns_scale;
	343	} LttBuffer;
	344
	345	struct _LttTracefile{
	346	gboolean cpu_online; //is the cpu online ?
	347	GQuark long_name; //tracefile complete filename
	348	GQuark name; //tracefile name
	349	guint cpu_num; //cpu number of the tracefile
	350	LttTrace * trace; //trace containing the tracefile
	351	int fd; //file descriptor
	352	off_t file_size; //file size
	353	//unsigned block_size; //block_size
	354	guint num_blocks; //number of blocks in the file
	355	gboolean reverse_bo; //must we reverse byte order ?
	356	gboolean float_word_order; //what is the byte order of floats ?
	357	size_t has_alignment; //alignment of events in the tracefile.
	358	// 0 or the architecture size in bytes.
	359
	360	size_t buffer_header_size;
	361
	362	/* Current event */
	363	LttEvent event; //Event currently accessible in the trace
	364
	365	/* Current block */
	366	LttBuffer buffer; //current buffer
	367	guint32 buf_size; /* The size of blocks */
	368
	369	/* Time flow */
	370	//unsigned int count; //the number of overflow of cycle count
	371	//double nsec_per_cycle; //Nsec per cycle
	372	//TimeHeartbeat * last_heartbeat; //last heartbeat
	373
	374	//LttCycleCount cycles_per_nsec_reciprocal; // Optimisation for speed
	375	//void * last_event_pos;
	376
	377	//LttTime prev_block_end_time; //the end time of previous block
	378	//LttTime prev_event_time; //the time of the previous event
	379	//LttCycleCount pre_cycle_count; //previous cycle count of the event
	380	};
	381
	382	struct _LttTrace{
	383	GQuark pathname; //the pathname of the trace
	384	//LttSystemDescription * system_description;//system description
	385
	386	GArray facilities_by_num; / fac_id as index in array */
	387	GData facilities_by_name; / fac name (GQuark) as index */
	388	/* Points to array of fac_id of all the
	389	* facilities that has this name. */
	390	guint num_cpu;
	391
	392	guint32 arch_type;
	393	guint32 arch_variant;
	394	guint8 arch_size;
	395	guint8 ltt_major_version;
	396	guint8 ltt_minor_version;
	397	guint8 flight_recorder;
	398	guint8 has_heartbeat;
	399	guint32 freq_scale;
	400	uint64_t start_freq;
	401	uint64_t start_tsc;
	402	uint64_t start_monotonic;
	403	LttTime start_time;
	404	LttTime start_time_from_tsc;
	405
	406	GData *tracefiles; //tracefiles groups
	407	};
	408
	409	/* The characteristics of the system on which the trace was obtained
	410	is described in a LttSystemDescription structure. */
	411
	412	struct _LttSystemDescription {
	413	gchar *description;
	414	gchar *node_name;
	415	gchar *domain_name;
	416	unsigned nb_cpu;
	417	LttArchSize size;
	418	LttArchEndian endian;
	419	gchar *kernel_name;
	420	gchar *kernel_release;
	421	gchar *kernel_version;
	422	gchar *machine;
	423	gchar *processor;
	424	gchar *hardware_platform;
	425	gchar *operating_system;
	426	LttTime trace_start;
	427	LttTime trace_end;
	428	};
	429
	430	/*****************************************************************************
	431	macro for size of some data types
	432	*****************************************************************************/
	433	// alignment -> dynamic!
	434
	435	//#define TIMESTAMP_SIZE sizeof(guint32)
	436	//#define EVENT_ID_SIZE sizeof(guint16)
	437	//#define EVENT_HEADER_SIZE (TIMESTAMP_SIZE + EVENT_ID_SIZE)
	438
	439
	440	/* Calculate the offset needed to align the type.
	441	* If has_alignment is 0, alignment is disactivated.
	442	* else, the function returns the offset needed to
	443	* align align_drift on the has_alignment value (should be
	444	* the size of the architecture). */
	445	static inline unsigned int ltt_align(size_t align_drift,
	446	size_t size_of_type,
	447	size_t has_alignment)
	448	{
	449	size_t alignment = min(has_alignment, size_of_type);
	450
	451	if(!has_alignment) return 0;
	452
	453	return ((alignment - align_drift) & (alignment-1));
	454	}
	455
	456
	457	#endif /* LTT_PRIVATE_H */