void
my_init(void)
          my_init() initializes some
          global variables that MySQL needs. It also calls
          mysql_thread_init() for this
          thread.
        
          It is necessary for my_init()
          to be called early in the initialization phase of a program's
          use of the MySQL client library. However,
          my_init() is automatically
          called by mysql_init(),
          mysql_library_init(),
          mysql_server_init(), and
          mysql_connect(). If you ensure
          that your program invokes one of those functions before any
          other MySQL calls, there is no need to invoke
          my_init() explicitly.
        
          To access the prototype for
          my_init(), your program should
          include these header files:
        
#include <my_global.h>
#include <my_sys.h>