1  /* Once-only control (native Windows implementation).
       2     Copyright (C) 2005-2021 Free Software Foundation, Inc.
       3  
       4     This file is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU Lesser General Public License as
       6     published by the Free Software Foundation; either version 2.1 of the
       7     License, or (at your option) any later version.
       8  
       9     This file 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
      12     GNU Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2005.
      18     Based on GCC's gthr-win32.h.  */
      19  
      20  #ifndef _WINDOWS_ONCE_H
      21  #define _WINDOWS_ONCE_H
      22  
      23  #define WIN32_LEAN_AND_MEAN  /* avoid including junk */
      24  #include <windows.h>
      25  
      26  typedef struct
      27          {
      28            volatile int inited;
      29            volatile LONG started;
      30            CRITICAL_SECTION lock;
      31          }
      32          glwthread_once_t;
      33  
      34  #define GLWTHREAD_ONCE_INIT { -1, -1 }
      35  
      36  #ifdef __cplusplus
      37  extern "C" {
      38  #endif
      39  
      40  extern void glwthread_once (glwthread_once_t *once_control,
      41                              void (*initfunction) (void));
      42  
      43  #ifdef __cplusplus
      44  }
      45  #endif
      46  
      47  #endif /* _WINDOWS_ONCE_H */