1  /* Timed recursive mutexes (native Windows implementation).
       2     Copyright (C) 2005-2023 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, 2019.
      18     Based on GCC's gthr-win32.h.  */
      19  
      20  #ifndef _WINDOWS_TIMEDRECMUTEX_H
      21  #define _WINDOWS_TIMEDRECMUTEX_H
      22  
      23  #define WIN32_LEAN_AND_MEAN  /* avoid including junk */
      24  #include <windows.h>
      25  
      26  #include <time.h>
      27  
      28  #include "windows-initguard.h"
      29  
      30  /* The native Windows documentation says that CRITICAL_SECTION already
      31     implements a recursive lock.  But we need not rely on it: It's easy to
      32     implement a recursive lock without this assumption.  */
      33  
      34  typedef struct
      35          {
      36            glwthread_initguard_t guard; /* protects the initialization */
      37            DWORD owner;
      38            unsigned long depth;
      39            HANDLE event;
      40            CRITICAL_SECTION lock;
      41          }
      42          glwthread_timedrecmutex_t;
      43  
      44  #define GLWTHREAD_TIMEDRECMUTEX_INIT { GLWTHREAD_INITGUARD_INIT, 0, 0 }
      45  
      46  #ifdef __cplusplus
      47  extern "C" {
      48  #endif
      49  
      50  extern int glwthread_timedrecmutex_init (glwthread_timedrecmutex_t *mutex);
      51  extern int glwthread_timedrecmutex_lock (glwthread_timedrecmutex_t *mutex);
      52  extern int glwthread_timedrecmutex_trylock (glwthread_timedrecmutex_t *mutex);
      53  extern int glwthread_timedrecmutex_timedlock (glwthread_timedrecmutex_t *mutex,
      54                                                const struct timespec *abstime);
      55  extern int glwthread_timedrecmutex_unlock (glwthread_timedrecmutex_t *mutex);
      56  extern int glwthread_timedrecmutex_destroy (glwthread_timedrecmutex_t *mutex);
      57  
      58  #ifdef __cplusplus
      59  }
      60  #endif
      61  
      62  #endif /* _WINDOWS_TIMEDRECMUTEX_H */