Fossil

** For the fossil_timer_xxx() family of functions...
*/
#ifdef _WIN32
# include <windows.h>
#else
# include <sys/time.h>
# include <sys/resource.h>
# include <sys/types.h>
# include <sys/stat.h>
# include <unistd.h>
# include <fcntl.h>
# include <errno.h>
#endif

/*
** Exit.  Take care to close the database first.

** Construct a temporary filename.
**
** The returned string is obtained from sqlite3_malloc() and must be
** freed by the caller.
*/
char *fossil_temp_filename(void){
  char *zTFile = 0;
  sqlite3 *db;
  const char *zDir;
  u64 r[2];
  int i;
#ifdef _WIN32
  char zTempDir[1000];
#else
  static const char *azTmp[] = {"/var/tmp","/usr/tmp","/tmp"};
#endif
  if( g.db ){
    sqlite3_file_control(g.db, 0, SQLITE_FCNTL_TEMPFILENAME, (void*)&zTFile);
    if( zTFile ) return zTFile;
  }
  sqlite3_randomness(sizeof(r), &r);
#if _WIN32
    db = g.db;
  zTempDir[0] = 0;
  GetTempPathA(sizeof(zTempDir), zTempDir);
  if( zTempDir[0] ){
    zDir = zTempDir;
  }else{
    sqlite3_open("",&db);
    zDir = fossil_getenv("LOCALAPPDATA");
    if( zDir==0 ) zDir = ".";
  }
  sqlite3_file_control(db, 0, SQLITE_FCNTL_TEMPFILENAME, (void*)&zTFile);
  if( g.db==0 ) sqlite3_close(db);
  return zTFile;
#else
  for(i=0; i<sizeof(azTmp)/sizeof(azTmp[0]); i++){
    struct stat buf;
    zDir = azTmp[i];
    if( stat(zDir,&buf)==0 && S_ISDIR(buf.st_mode) && access(zDir,03)==0 ){
      break;
    }
  }
  if( i>=sizeof(azTmp)/sizeof(azTmp[0]) ) zDir = ".";
#endif
  return sqlite3_mprintf("%s/fossil%016llx%016llx", zDir, r[0], r[1]);
}

/*
** Turn memory limits for stack and heap on and off.  The argument
** is true to turn memory limits on and false to turn them off.
**
** Memory limits should be enabled at startup, but then turned off