1  /* Internal definitions for pthreads library.
       2     Copyright (C) 2000-2023 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  #ifndef _PT_SYSDEP_H
      20  #define _PT_SYSDEP_H	1
      21  
      22  #include <stddef.h>
      23  #include <mach.h>
      24  
      25  /* XXX */
      26  #define _POSIX_THREAD_THREADS_MAX	64
      27  
      28  /* The default stack size.  */
      29  #define PTHREAD_STACK_DEFAULT	(8 * 1024 * 1024)
      30  
      31  #define PTHREAD_SYSDEP_MEMBERS \
      32    thread_t kernel_thread;      \
      33    mach_msg_header_t wakeupmsg;
      34  
      35  extern __thread struct __pthread *___pthread_self;
      36  libc_hidden_tls_proto (___pthread_self)
      37  
      38  #ifdef DEBUG
      39  #define _pthread_self()                                            \
      40  	({                                                         \
      41  	  struct __pthread *thread;                                \
      42  	                                                           \
      43  	  assert (GL (dl_pthread_threads));                        \
      44  	  thread = ___pthread_self;                                \
      45  	                                                           \
      46  	  assert (thread);                                         \
      47  	  assert (({ mach_port_t ktid = __mach_thread_self ();     \
      48                       int ok = thread->kernel_thread == ktid;       \
      49                       __mach_port_deallocate (__mach_task_self (), ktid);\
      50                       ok; }));                                      \
      51            thread;                                                  \
      52           })
      53  #else
      54  #define _pthread_self() ___pthread_self
      55  #endif
      56  
      57  extern inline void
      58  __attribute__ ((__always_inline__))
      59  __pthread_stack_dealloc (void *stackaddr, size_t stacksize)
      60  {
      61    __vm_deallocate (__mach_task_self (), (vm_offset_t) stackaddr, stacksize);
      62  }
      63  
      64  /* Change thread THREAD's program counter to PC if SET_PC is true,
      65     its stack pointer to SP if SET_IP is true, and its thread pointer
      66     to TP if SET_TP is true.  */
      67  extern int __thread_set_pcsptp (thread_t thread,
      68  				int set_pc, void *pc,
      69  				int set_sp, void *sp, int set_tp, void *tp);
      70  
      71  
      72  #endif /* pt-sysdep.h */