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MySQL 5.1: mysql/src/5.1-dbg/sql/sql_map.h File Reference

mysql/src/5.1-dbg/sql/sql_map.h File Reference

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Classes

class  mapped_files
class  mapped_file

Functions

mapped_files * map_file (const my_string name, byte *magic, uint magic_length)
void unmap_file (mapped_files *map)

Function Documentation

mapped_files* map_file ( const my_string  name,
byte *  magic,
uint  magic_length 
)

Definition at line 86 of file sql_map.cc.

References current_thd, ER_NO_FILE_MAPPING, FN_REFLEN, list(), LOCK_mapped_file, map, maps_in_use, my_error(), MYF, mysql_data_home, NULL, path, pthread_mutex_lock, pthread_mutex_unlock, strcmp(), unpack_filename(), and VOID.

Referenced by mapped_file::mapped_file().

00087 {
00088 #ifdef HAVE_MMAP
00089   VOID(pthread_mutex_lock(&LOCK_mapped_file));
00090   I_List_iterator<mapped_files> list(maps_in_use);
00091   mapped_files *map;
00092   char path[FN_REFLEN];
00093   sprintf(path,"%s/%s/%s.uniq",mysql_data_home,current_thd->db,name);
00094   (void) unpack_filename(path,path);
00095 
00096   while ((map=list++))
00097   {
00098     if (!strcmp(path,map->name))
00099       break;
00100   }
00101   if (!map)
00102   {
00103     map=new mapped_files(path,magic,magic_length);
00104     maps_in_use.append(map);
00105   }
00106   else
00107   {
00108     map->use_count++;
00109     if (!map->map)
00110       my_error(ER_NO_FILE_MAPPING, MYF(0), path, map->error);
00111   }
00112   VOID(pthread_mutex_unlock(&LOCK_mapped_file));
00113   return map;
00114 #else
00115   return NULL;
00116 #endif
00117 }

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void unmap_file ( mapped_files *  map  ) 

Definition at line 123 of file sql_map.cc.

References LOCK_mapped_file, map, pthread_mutex_lock, pthread_mutex_unlock, and VOID.

Referenced by mapped_file::~mapped_file().

00124 {
00125 #ifdef HAVE_MMAP
00126   VOID(pthread_mutex_lock(&LOCK_mapped_file));
00127   if (!map->use_count--)
00128     delete map;
00129   VOID(pthread_mutex_unlock(&LOCK_mapped_file));
00130 #endif
00131 }

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Generated on Sat Sep 9 03:07:36 2006 for MySQL 5.1 by  doxygen 1.4.7