1  /* pthread_mutex_timedlock.  Hurd version.
       2     Copyright (C) 2016-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library;  if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <pthread.h>
      20  #include <stdlib.h>
      21  #include <assert.h>
      22  #include <pt-internal.h>
      23  #include "pt-mutex.h"
      24  #include <hurdlock.h>
      25  
      26  int
      27  __pthread_mutex_clocklock (pthread_mutex_t *mtxp,
      28  			   clockid_t clockid,
      29  			   const struct timespec *tsp)
      30  {
      31    struct __pthread *self;
      32    int ret, flags = mtxp->__flags & GSYNC_SHARED;
      33  
      34    switch (MTX_TYPE (mtxp))
      35      {
      36      case PT_MTX_NORMAL:
      37        ret = lll_abstimed_lock (mtxp->__lock, tsp, flags, clockid);
      38        break;
      39  
      40      case PT_MTX_RECURSIVE:
      41        self = _pthread_self ();
      42        if (mtx_owned_p (mtxp, self, flags))
      43  	{
      44  	  if (__glibc_unlikely (mtxp->__cnt + 1 == 0))
      45  	    return EAGAIN;
      46  
      47  	  ++mtxp->__cnt;
      48  	  ret = 0;
      49  	}
      50        else if ((ret = lll_abstimed_lock (mtxp->__lock, tsp, flags, clockid)) == 0)
      51  	{
      52  	  mtx_set_owner (mtxp, self, flags);
      53  	  mtxp->__cnt = 1;
      54  	}
      55  
      56        break;
      57  
      58      case PT_MTX_ERRORCHECK:
      59        self = _pthread_self ();
      60        if (mtx_owned_p (mtxp, self, flags))
      61  	ret = EDEADLK;
      62        else if ((ret = lll_abstimed_lock (mtxp->__lock, tsp, flags, clockid)) == 0)
      63  	mtx_set_owner (mtxp, self, flags);
      64  
      65        break;
      66  
      67      case PT_MTX_NORMAL | PTHREAD_MUTEX_ROBUST:
      68      case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST:
      69      case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST:
      70        self = _pthread_self ();
      71        ROBUST_LOCK (self, mtxp, lll_robust_abstimed_lock, tsp, flags, clockid);
      72        break;
      73  
      74      default:
      75        ret = EINVAL;
      76        break;
      77      }
      78  
      79    return ret;
      80  }
      81  weak_alias (__pthread_mutex_clocklock, pthread_mutex_clocklock)
      82  
      83  int
      84  __pthread_mutex_timedlock (pthread_mutex_t *mutex,
      85  			   const struct timespec *tsp)
      86  {
      87    return __pthread_mutex_clocklock (mutex, CLOCK_REALTIME, tsp);
      88  }
      89  weak_alias (__pthread_mutex_timedlock, pthread_mutex_timedlock)
      90  hidden_def (__pthread_mutex_timedlock)