move all projects into the trunk directory
[lttv.git] / trunk / lttng-xenomai / LinuxTraceToolkitViewer-0.8.61-xenoltt / ltt / facility.c
diff --git a/trunk/lttng-xenomai/LinuxTraceToolkitViewer-0.8.61-xenoltt/ltt/facility.c b/trunk/lttng-xenomai/LinuxTraceToolkitViewer-0.8.61-xenoltt/ltt/facility.c
new file mode 100644 (file)
index 0000000..619a4ba
--- /dev/null
@@ -0,0 +1,896 @@
+/* This file is part of the Linux Trace Toolkit viewer
+ * Copyright (C) 2003-2004 Xiangxiu Yang
+ *               2005 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h> 
+#include <string.h>
+#include <stdio.h>
+#include <glib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+
+
+#include "parser.h"
+#include <ltt/ltt.h>
+#include "ltt-private.h"
+#include <ltt/facility.h>
+
+#ifndef g_open
+#define g_open open
+#endif
+
+#define g_close close
+
+/* search for the (named) type in the table, if it does not exist
+   create a new one */
+LttType * lookup_named_type(LttFacility *fac, type_descriptor_t * td);
+
+/* construct directed acyclic graph for types, and tree for fields */
+void construct_fields(LttFacility *fac,
+                                                                                       LttField *field,
+                      field_t *fld);
+
+/* generate the facility according to the events belongin to it */
+void generateFacility(LttFacility * f, facility_t  * fac, 
+                      guint32 checksum);
+
+/* functions to release the memory occupied by a facility */
+void freeFacility(LttFacility * facility);
+void freeEventtype(LttEventType * evType);
+void freeLttType(LttType * type);
+void freeLttField(LttField * fld);
+void freeLttNamedType(LttType * type);
+
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_open       : open facilities
+ *Input params
+ *    t                       : the trace containing the facilities
+ *    pathname                : the path name of the facility   
+ *
+ *  Open the facility corresponding to the right checksum.
+ * 
+ *returns 0 on success, 1 on error.
+ ****************************************************************************/
+
+int ltt_facility_open(LttFacility *f, LttTrace * t, gchar * pathname)
+{
+  int ret = 0;
+  gchar *token;
+  parse_file_t in;
+  facility_t * fac;
+  unsigned int checksum;
+  gchar buffer[BUFFER_SIZE];
+  gboolean generated = FALSE;
+
+  in.buffer = &(buffer[0]);
+  in.lineno = 0;
+  in.error = error_callback;
+  in.name = pathname;
+  in.unget = 0;
+
+  in.fp = fopen(in.name, "r");
+  if(in.fp == NULL) {
+    g_warning("cannot open facility description file %s",
+        in.name);
+    ret = 1;
+    goto open_error;
+  }
+
+  while(1){
+    token = getToken(&in);
+    if(in.type == ENDFILE) break;
+   
+               if(g_ascii_strcasecmp(token, "<")) in.error(&in,"not a facility file");
+               token = getName(&in);
+               if(g_ascii_strcasecmp(token, "?")) in.error(&in,"not a facility file");
+               token = getName(&in);
+               if(g_ascii_strcasecmp(token, "xml")) in.error(&in,"not a facility file");
+               token = getName(&in);
+               if(g_ascii_strcasecmp(token, "version")) in.error(&in,"not a facility file");
+               token = getName(&in);
+               if(g_ascii_strcasecmp(token, "=")) in.error(&in,"not a facility file");
+               token = getQuotedString(&in);
+               if(g_ascii_strcasecmp(token, "1.0")) in.error(&in,"not a facility file");
+               token = getName(&in);
+               if(g_ascii_strcasecmp(token, "?")) in.error(&in,"not a facility file");
+               token = getToken(&in);
+               if(g_ascii_strcasecmp(token, ">")) in.error(&in,"not a facility file");
+
+               token = getToken(&in);
+               
+    if(g_ascii_strcasecmp(token, "<")) in.error(&in,"not a facility file");
+    token = getName(&in);
+
+    if(g_ascii_strcasecmp("facility",token) == 0) {
+      fac = g_new(facility_t, 1);
+      fac->name = NULL;
+      fac->description = NULL;
+      sequence_init(&(fac->events));
+      table_init(&(fac->named_types));
+      sequence_init(&(fac->unnamed_types));
+      
+      parseFacility(&in, fac);
+
+      //check if any namedType is not defined
+      checkNamedTypesImplemented(&fac->named_types);
+    
+      generateChecksum(fac->name, &checksum, &fac->events);
+  
+      if(checksum == f->checksum) {
+        generateFacility(f, fac, checksum);
+        generated = TRUE;
+      }
+
+      g_free(fac->name);
+      free(fac->capname);
+      g_free(fac->description);
+      freeEvents(&fac->events);
+      sequence_dispose(&fac->events);
+      freeNamedType(&fac->named_types);
+      table_dispose(&fac->named_types);
+      freeTypes(&fac->unnamed_types);
+      sequence_dispose(&fac->unnamed_types);      
+      g_free(fac);
+      if(generated) break; /* use the first good match */
+    }
+    else {
+      g_warning("facility token was expected in file %s", in.name);
+      ret = 1;
+      goto parse_error;
+    }
+  }
+  
+ parse_error:
+  fclose(in.fp);
+open_error:
+
+  if(!generated) {
+    g_warning("Cannot find facility %s, checksum 0x%X",
+        g_quark_to_string(f->name), f->checksum);
+    ret = 1;
+  }
+
+  return ret;
+}
+
+
+/*****************************************************************************
+ *Function name
+ *    generateFacility    : generate facility, internal function
+ *Input params 
+ *    facility            : LttFacilty structure
+ *    fac                 : facility structure
+ *    checksum            : checksum of the facility          
+ ****************************************************************************/
+
+void generateFacility(LttFacility *f, facility_t *fac, guint32 checksum)
+{
+  char * facilityName = fac->name;
+  sequence_t * events = &fac->events;
+  unsigned int i, j;
+  LttType * type;
+  table_t *named_types = &fac->named_types;
+  
+  g_assert(f->name == g_quark_from_string(facilityName));
+  g_assert(f->checksum == checksum);
+
+  //f->event_number = events->position;
+  
+  //initialize inner structures
+  f->events = g_array_sized_new (FALSE, TRUE, sizeof(LttEventType),
+      events->position);
+  //f->events = g_new(LttEventType*,f->event_number);
+  f->events = g_array_set_size(f->events, events->position);
+
+  g_datalist_init(&f->events_by_name);
+ // g_datalist_init(&f->named_types);
+#if 0
+  /* The first day, he created the named types */
+
+  for(i=0; i<named_types->keys.position; i++) {
+    GQuark name = g_quark_from_string((char*)named_types->keys.array[i]);
+    type_descriptor_t *td = (type_descriptor_t*)named_types->values.array[i];
+
+    /* Create the type */
+    type = g_new(LttType,1);
+    type->type_name = name;
+    type->type_class = td->type;
+    if(td->fmt) type->fmt = g_strdup(td->fmt);
+    else type->fmt = NULL;
+    type->size = td->size;
+    type->enum_strings = NULL;
+    type->element_type = NULL;
+    type->element_number = 0;
+
+    construct_types_and_fields(type, td, NULL, NULL, ...);
+    
+    g_datalist_id_set_data_full(&fac->named_types, name,
+                type, (GDestroyNotify)freeLttNamedType);
+
+  }
+#endif //0
+  /* The second day, he created the event fields and types */
+  //for each event, construct field and type acyclic graph
+  for(i=0;i<events->position;i++){
+               event_t *parser_event = (event_t*)events->array[i];
+    LttEventType *event_type = &g_array_index(f->events, LttEventType, i);
+
+    event_type->name = 
+      g_quark_from_string(parser_event->name);
+    
+    g_datalist_id_set_data(&f->events_by_name, event_type->name,
+        event_type);
+    
+    event_type->description =
+      g_strdup(parser_event->description);
+    
+    event_type->index = i;
+    event_type->facility = f;
+
+    event_type->fields = g_array_sized_new(FALSE, TRUE,
+        sizeof(LttField), parser_event->fields.position);
+    event_type->fields = 
+      g_array_set_size(event_type->fields, parser_event->fields.position);
+    g_datalist_init(&event_type->fields_by_name);
+  
+    for(j=0; j<parser_event->fields.position; j++) {
+      LttField *field = &g_array_index(event_type->fields, LttField, j);
+      field_t *parser_field = (field_t*)parser_event->fields.array[j];
+
+      construct_fields(f, field, parser_field);
+      g_datalist_id_set_data(&event_type->fields_by_name, 
+         field->name, 
+         field);
+    }
+  }
+
+  /* What about 2 days weeks ? */
+}
+
+
+/*****************************************************************************
+ *Function name
+ *    construct_types_and_fields : construct field tree and type graph,
+ *                             internal recursion function
+ *Input params 
+ *    fac                    : facility struct
+ *    field                  : destination lttv field
+ *    fld                    : source parser field
+ ****************************************************************************/
+
+//DONE
+//make the change for arrays and sequences
+//no more root field. -> change this for an array of fields.
+// Compute the field size here.
+// Flag fields as "VARIABLE OFFSET" or "FIXED OFFSET" : as soon as
+// a field with a variable size is found, all the following fields must
+// be flagged with "VARIABLE OFFSET", this will be done by the offset
+// precomputation.
+
+
+void construct_fields(LttFacility *fac,
+                                                                                       LttField *field,
+                      field_t *fld)
+{
+  guint len;
+  type_descriptor_t *td;
+  LttType *type;
+
+       if(fld->name)
+         field->name = g_quark_from_string(fld->name);
+       else
+               fld->name = 0;
+
+  if(fld->description) {
+    len = strlen(fld->description);
+    field->description = g_new(gchar, len+1);
+    strcpy(field->description, fld->description);
+  }
+  field->dynamic_offsets = NULL;
+  type = &field->field_type;
+  td = fld->type;
+
+  type->enum_map = NULL;
+  type->fields = NULL;
+  type->fields_by_name = NULL;
+       type->network = td->network;
+
+  switch(td->type) {
+    case INT_FIXED:
+      type->type_class = LTT_INT_FIXED;
+      type->size = td->size;
+      break;
+    case UINT_FIXED:
+      type->type_class = LTT_UINT_FIXED;
+      type->size = td->size;
+      break;
+    case POINTER:
+      type->type_class = LTT_POINTER;
+      type->size = fac->pointer_size;
+      break;
+    case CHAR:
+      type->type_class = LTT_CHAR;
+      type->size = td->size;
+      break;
+    case UCHAR:
+      type->type_class = LTT_UCHAR;
+      type->size = td->size;
+      g_assert(type->size != 0);
+      break;
+    case SHORT:
+      type->type_class = LTT_SHORT;
+      type->size = td->size;
+      break;
+    case USHORT:
+      type->type_class = LTT_USHORT;
+      type->size = td->size;
+      break;
+    case INT:
+      type->type_class = LTT_INT;
+      type->size = fac->int_size;
+      break;
+    case UINT:
+      type->type_class = LTT_UINT;
+      type->size = fac->int_size;
+      g_assert(type->size != 0);
+      break;
+    case LONG:
+      type->type_class = LTT_LONG;
+      type->size = fac->long_size;
+      break;
+    case ULONG:
+      type->type_class = LTT_ULONG;
+      type->size = fac->long_size;
+      break;
+    case SIZE_T:
+      type->type_class = LTT_SIZE_T;
+      type->size = fac->size_t_size;
+      break;
+    case SSIZE_T:
+      type->type_class = LTT_SSIZE_T;
+      type->size = fac->size_t_size;
+      break;
+    case OFF_T:
+      type->type_class = LTT_OFF_T;
+      type->size = fac->size_t_size;
+      break;
+    case FLOAT:
+      type->type_class = LTT_FLOAT;
+      type->size = td->size;
+      break;
+    case STRING:
+      type->type_class = LTT_STRING;
+      type->size = 0;
+      break;
+    case ENUM:
+      type->type_class = LTT_ENUM;
+      type->size = fac->int_size;
+      {
+        guint i;
+        type->enum_map = g_hash_table_new(g_direct_hash, g_direct_equal);
+        for(i=0; i<td->labels.position; i++) {
+          GQuark value = g_quark_from_string((char*)td->labels.array[i]);
+          gint key = *(int*)td->labels_values.array[i];
+          g_hash_table_insert(type->enum_map, (gpointer)key, (gpointer)value);
+        }
+      }
+      g_assert(type->size != 0);
+      break;
+    case ARRAY:
+      type->type_class = LTT_ARRAY;
+      type->size = td->size;
+      type->fields = g_array_sized_new(FALSE, TRUE, sizeof(LttField),
+          td->fields.position);
+      type->fields = g_array_set_size(type->fields, td->fields.position);
+      {
+        guint i;
+
+        for(i=0; i<td->fields.position; i++) {
+          field_t *schild = (field_t*)td->fields.array[i];
+          LttField *dchild = &g_array_index(type->fields, LttField, i);
+          
+          construct_fields(fac, dchild, schild);
+        }
+      }
+      break;
+    case SEQUENCE:
+      type->type_class = LTT_SEQUENCE;
+      type->size = 0;
+      type->fields = g_array_sized_new(FALSE, TRUE, sizeof(LttField),
+          td->fields.position);
+      type->fields = g_array_set_size(type->fields, td->fields.position);
+      {
+        guint i;
+
+        for(i=0; i<td->fields.position; i++) {
+          field_t *schild = (field_t*)td->fields.array[i];
+          LttField *dchild = &g_array_index(type->fields, LttField, i);
+          
+          construct_fields(fac, dchild, schild);
+        }
+      }
+      break;
+    case STRUCT:
+      type->type_class = LTT_STRUCT;
+      type->size = 0; // Size not calculated by the parser.
+      type->fields = g_array_sized_new(FALSE, TRUE, sizeof(LttField),
+          td->fields.position);
+      type->fields = g_array_set_size(type->fields, td->fields.position);
+      g_datalist_init(&type->fields_by_name);
+      {
+        guint i;
+
+        for(i=0; i<td->fields.position; i++) {
+          field_t *schild = (field_t*)td->fields.array[i];
+          LttField *dchild = &g_array_index(type->fields, LttField, i);
+          
+          construct_fields(fac, dchild, schild);
+          g_datalist_id_set_data(&type->fields_by_name, 
+             dchild->name, 
+             dchild);
+        }
+      }
+      break;
+    case UNION:
+      type->type_class = LTT_UNION;
+      type->size = 0; // Size not calculated by the parser.
+      type->fields = g_array_sized_new(FALSE, TRUE, sizeof(LttField),
+          td->fields.position);
+      type->fields = g_array_set_size(type->fields, td->fields.position);
+      g_datalist_init(&type->fields_by_name);
+      {
+        guint i;
+
+        for(i=0; i<td->fields.position; i++) {
+          field_t *schild = (field_t*)td->fields.array[i];
+          LttField *dchild = &g_array_index(type->fields, LttField, i);
+          
+          construct_fields(fac, dchild, schild);
+          g_datalist_id_set_data(&type->fields_by_name, 
+             dchild->name, 
+             dchild);
+        }
+      }
+      break;
+    case NONE:
+    default:
+      g_error("construct_fields : unknown type");
+  }
+
+  field->field_size = type->size;
+
+  /* Put the fields as "variable" offset to root first. Then,
+   * the offset precomputation will only have to set the FIELD_FIXED until
+   * it reaches the first variable length field, then stop.
+   */
+  field->fixed_root = FIELD_VARIABLE;
+
+  if(td->fmt) {
+    len = strlen(td->fmt);
+    type->fmt = g_new(gchar, len+1);
+    strcpy(type->fmt, td->fmt);
+  }
+}
+
+
+
+#if 0
+void construct_types_and_fields(LttFacility * fac, type_descriptor_t * td, 
+                            LttField * fld)
+{
+  int i;
+  type_descriptor_t * tmpTd;
+
+  switch(td->type) {
+    case INT:
+    case UINT:
+    case FLOAT:
+      fld->field_type->size = td->size;
+      break;
+    case POINTER:
+    case LONG:
+    case ULONG:
+    case SIZE_T:
+    case SSIZE_T:
+    case OFF_T:
+      fld->field_type->size = 0;
+      break;
+    case STRING:
+      fld->field_type->size = 0;
+      break;
+    case ENUM:
+      fld->field_type->element_number = td->labels.position;
+      fld->field_type->enum_strings = g_new(GQuark,td->labels.position);
+      for(i=0;i<td->labels.position;i++){
+        fld->field_type->enum_strings[i] 
+                       = g_quark_from_string(((char*)(td->labels.array[i])));
+      }
+      fld->field_type->size = td->size;
+      break;
+
+    case ARRAY:
+      fld->field_type->element_number = (unsigned)td->size;
+    case SEQUENCE:
+    fld->field_type->element_type = g_new(LttType*,1);
+    tmpTd = td->nested_type;
+    fld->field_type->element_type[0] = lookup_named_type(fac, tmpTd);
+    fld->child = g_new(LttField*, 1);
+    fld->child[0] = g_new(LttField, 1);
+    
+    fld->child[0]->field_type = fld->field_type->element_type[0];
+    fld->child[0]->offset_root = 0;
+    fld->child[0]->fixed_root = FIELD_UNKNOWN;
+    fld->child[0]->offset_parent = 0;
+    fld->child[0]->fixed_parent = FIELD_UNKNOWN;
+    fld->child[0]->field_size  = 0;
+    fld->child[0]->fixed_size = FIELD_UNKNOWN;
+    fld->child[0]->parent = fld;
+    fld->child[0]->child = NULL;
+    fld->child[0]->current_element = 0;
+    construct_types_and_fields(fac, tmpTd, fld->child[0]);
+    break;
+
+  case STRUCT:
+  case UNION:
+    fld->field_type->element_number = td->fields.position;
+
+    g_assert(fld->field_type->element_type == NULL);
+    fld->field_type->element_type = g_new(LttType*, td->fields.position);
+
+    fld->child = g_new(LttField*, td->fields.position);      
+    for(i=0;i<td->fields.position;i++){
+      tmpTd = ((field_t*)(td->fields.array[i]))->type;
+
+       fld->field_type->element_type[i] = lookup_named_type(fac, tmpTd);
+      fld->child[i] = g_new(LttField,1); 
+
+ //     fld->child[i]->field_pos = i;
+      fld->child[i]->field_type = fld->field_type->element_type[i]; 
+
+      fld->child[i]->field_type->element_name 
+                 = g_quark_from_string(((field_t*)(td->fields.array[i]))->name);
+
+      fld->child[i]->offset_root = 0;
+      fld->child[i]->fixed_root = FIELD_UNKNOWN;
+      fld->child[i]->offset_parent = 0;
+      fld->child[i]->fixed_parent = FIELD_UNKNOWN;
+      fld->child[i]->field_size  = 0;
+      fld->child[i]->fixed_size = FIELD_UNKNOWN;
+      fld->child[i]->parent = fld;
+      fld->child[i]->child = NULL;
+      fld->child[i]->current_element = 0;
+      construct_types_and_fields(fac, tmpTd, fld->child[i]);
+    }    
+    break;
+
+  default:
+    g_error("construct_types_and_fields : unknown type");
+  }
+
+
+}
+
+#endif //0
+
+#if 0
+void construct_types_and_fields(LttFacility * fac, type_descriptor * td, 
+                            LttField * fld)
+{
+  int i, flag;
+  type_descriptor * tmpTd;
+
+  //  if(td->type == LTT_STRING || td->type == LTT_SEQUENCE)
+  //    fld->field_size = 0;
+  //  else fld->field_size = -1;
+
+  if(td->type == LTT_ENUM){
+    fld->field_type->element_number = td->labels.position;
+    fld->field_type->enum_strings = g_new(GQuark,td->labels.position);
+    for(i=0;i<td->labels.position;i++){
+      fld->field_type->enum_strings[i] 
+                     = g_quark_from_string(((char*)(td->labels.array[i])));
+    }
+  }else if(td->type == LTT_ARRAY || td->type == LTT_SEQUENCE){
+    if(td->type == LTT_ARRAY)
+      fld->field_type->element_number = (unsigned)td->size;
+    fld->field_type->element_type = g_new(LttType*,1);
+    tmpTd = td->nested_type;
+    fld->field_type->element_type[0] = lookup_named_type(fac, tmpTd);
+    fld->child = g_new(LttField*, 1);
+    fld->child[0] = g_new(LttField, 1);
+    
+//    fld->child[0]->field_pos = 0;
+    fld->child[0]->field_type = fld->field_type->element_type[0];
+    fld->child[0]->offset_root = fld->offset_root;
+    fld->child[0]->fixed_root = fld->fixed_root;
+    fld->child[0]->offset_parent = 0;
+    fld->child[0]->fixed_parent = 1;
+    //    fld->child[0]->base_address = NULL;
+    fld->child[0]->field_size  = 0;
+    fld->child[0]->field_fixed = -1;
+    fld->child[0]->parent = fld;
+    fld->child[0]->child = NULL;
+    fld->child[0]->current_element = 0;
+    construct_types_and_fields(fac, tmpTd, fld->child[0]);
+  }else if(td->type == LTT_STRUCT){
+    fld->field_type->element_number = td->fields.position;
+
+    if(fld->field_type->element_type == NULL){
+      fld->field_type->element_type = g_new(LttType*, td->fields.position);
+      flag = 1;
+    }else{
+      flag = 0;
+    }
+
+    fld->child = g_new(LttField*, td->fields.position);      
+    for(i=0;i<td->fields.position;i++){
+      tmpTd = ((type_fields*)(td->fields.array[i]))->type;
+
+      if(flag)
+       fld->field_type->element_type[i] = lookup_named_type(fac, tmpTd);
+      fld->child[i] = g_new(LttField,1); 
+
+      fld->child[i]->field_pos = i;
+      fld->child[i]->field_type = fld->field_type->element_type[i]; 
+
+      if(flag){
+       fld->child[i]->field_type->element_name 
+                 = g_quark_from_string(((type_fields*)(td->fields.array[i]))->name);
+      }
+
+      fld->child[i]->offset_root = -1;
+      fld->child[i]->fixed_root = -1;
+      fld->child[i]->offset_parent = -1;
+      fld->child[i]->fixed_parent = -1;
+      //      fld->child[i]->base_address = NULL;
+      fld->child[i]->field_size  = 0;
+      fld->child[i]->field_fixed = -1;
+      fld->child[i]->parent = fld;
+      fld->child[i]->child = NULL;
+      fld->child[i]->current_element = 0;
+      construct_types_and_fields(fac, tmpTd, fld->child[i]);
+    }    
+  }
+}
+#endif //0
+
+#if 0
+/*****************************************************************************
+ *Function name
+ *    lookup_named_type: search named type in the table
+ *                       internal function
+ *Input params 
+ *    fac              : facility struct
+ *    name             : type name
+ *Return value    
+ *                     : either find the named type, or create a new LttType
+ ****************************************************************************/
+
+LttType * lookup_named_type(LttFacility *fac, GQuark type_name)
+{
+  LttType *type = NULL;
+  
+  /* Named type */
+  type = g_datalist_id_get_data(&fac->named_types, name);
+
+  g_assert(type != NULL);
+#if 0
+  if(type == NULL){
+    /* Create the type */
+    type = g_new(LttType,1);
+    type->type_name = name;
+    type->type_class = td->type;
+    if(td->fmt) type->fmt = g_strdup(td->fmt);
+    else type->fmt = NULL;
+    type->size = td->size;
+    type->enum_strings = NULL;
+    type->element_type = NULL;
+    type->element_number = 0;
+    
+    if(td->type_name != NULL)
+      g_datalist_id_set_data_full(&fac->named_types, name,
+                  type, (GDestroyNotify)freeLttNamedType);
+  }
+#endif //0
+  return type;
+}
+#endif //0
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_close      : close a facility, decrease its usage count,
+ *                              if usage count = 0, release the memory
+ *Input params
+ *    f                       : facility that will be closed
+ ****************************************************************************/
+
+void ltt_facility_close(LttFacility *f)
+{
+  //release the memory it occupied
+  freeFacility(f);
+}
+
+/*****************************************************************************
+ * Functions to release the memory occupied by the facility
+ ****************************************************************************/
+
+void freeFacility(LttFacility * fac)
+{
+  guint i;
+  LttEventType *et;
+
+  for(i=0; i<fac->events->len; i++) {
+    et = &g_array_index (fac->events, LttEventType, i);
+    freeEventtype(et);
+  }
+  g_array_free(fac->events, TRUE);
+
+  g_datalist_clear(&fac->events_by_name);
+
+ // g_datalist_clear(&fac->named_types);
+}
+
+void freeEventtype(LttEventType * evType)
+{
+  unsigned int i;
+  LttType * root_type;
+  if(evType->description)
+    g_free(evType->description);
+  
+  for(i=0; i<evType->fields->len;i++) {
+    LttField *field = &g_array_index(evType->fields, LttField, i);
+    freeLttField(field);
+  }
+  g_array_free(evType->fields, TRUE);
+  g_datalist_clear(&evType->fields_by_name);
+}
+
+void freeLttType(LttType * type)
+{
+  unsigned int i;
+
+  if(type->fmt)
+    g_free(type->fmt);
+
+  if(type->enum_map)
+    g_hash_table_destroy(type->enum_map);
+
+  if(type->fields) {
+    for(i=0; i<type->fields->len; i++) {
+      freeLttField(&g_array_index(type->fields, LttField, i));
+    }
+    g_array_free(type->fields, TRUE);
+  }
+  if(type->fields_by_name)
+    g_datalist_clear(&type->fields_by_name);
+}
+
+void freeLttNamedType(LttType * type)
+{
+  freeLttType(type);
+}
+
+void freeLttField(LttField * field)
+{ 
+  if(field->description)
+    g_free(field->description);
+  if(field->dynamic_offsets)
+    g_array_free(field->dynamic_offsets, TRUE);
+  freeLttType(&field->field_type);
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_name       : obtain the facility's name
+ *Input params
+ *    f                       : the facility
+ *Return value
+ *    GQuark                  : the facility's name
+ ****************************************************************************/
+
+GQuark ltt_facility_name(LttFacility *f)
+{
+  return f->name;
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_checksum   : obtain the facility's checksum
+ *Input params
+ *    f                       : the facility
+ *Return value
+ *                            : the checksum of the facility 
+ ****************************************************************************/
+
+guint32 ltt_facility_checksum(LttFacility *f)
+{
+  return f->checksum;
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_base_id    : obtain the facility base id
+ *Input params
+ *    f                       : the facility
+ *Return value
+ *                            : the base id of the facility
+ ****************************************************************************/
+
+guint ltt_facility_id(LttFacility *f)
+{
+  return f->id;
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_eventtype_number: obtain the number of the event types 
+ *Input params
+ *    f                            : the facility that will be closed
+ *Return value
+ *                                 : the number of the event types 
+ ****************************************************************************/
+
+guint8 ltt_facility_eventtype_number(LttFacility *f)
+{
+  return (f->events->len);
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_eventtype_get: obtain the event type according to event id
+ *                                from 0 to event_number - 1
+ *Input params
+ *    f                         : the facility that will be closed
+ *Return value
+ *    LttEventType *           : the event type required  
+ ****************************************************************************/
+
+LttEventType *ltt_facility_eventtype_get(LttFacility *f, guint8 i)
+{
+  if(!f->exists) return NULL;
+
+  g_assert(i < f->events->len);
+  return &g_array_index(f->events, LttEventType, i);
+}
+
+/*****************************************************************************
+ *Function name
+ *    ltt_facility_eventtype_get_by_name
+ *                     : obtain the event type according to event name
+ *                       event name is unique in the facility
+ *Input params
+ *    f                : the facility
+ *    name             : the name of the event
+ *Return value
+ *    LttEventType *  : the event type required  
+ ****************************************************************************/
+
+LttEventType *ltt_facility_eventtype_get_by_name(LttFacility *f, GQuark name)
+{
+  LttEventType *et = g_datalist_id_get_data(&f->events_by_name, name);
+  return et;
+}
+
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