lib/windows-thread.h

   1 /* Creating and controlling threads (native Windows implementation).
   2    Copyright (C) 2005-2020 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program 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 General Public License for more details.
  13
  14    You should have received a copy of the GNU 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_THREAD_H
  21 #define _WINDOWS_THREAD_H
  22
  23 #define WIN32_LEAN_AND_MEAN  /* avoid including junk */
  24 #include <windows.h>
  25
  26 /* The glwthread_thread_t is a pointer to a structure in memory.
  27    Why not the thread handle?  If it were the thread handle, it would be hard
  28    to implement glwthread_thread_self() (since GetCurrentThread () returns a
  29    pseudo-handle, DuplicateHandle (GetCurrentThread ()) returns a handle that
  30    must be closed afterwards, and there is no function for quickly retrieving
  31    a thread handle from its id).
  32    Why not the thread id?  I tried it.  It did not work: Sometimes ids appeared
  33    that did not belong to running threads, and glthread_join failed with ESRCH.
  34  */
  35 typedef struct glwthread_thread_struct *glwthread_thread_t;
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /* attr is a bit mask, consisting of the following bits: */
  42 #define GLWTHREAD_ATTR_DETACHED 1
  43 extern int glwthread_thread_create (glwthread_thread_t *threadp,
  44                                     unsigned int attr,
  45                                     void * (*func) (void *), void *arg);
  46 extern int glwthread_thread_join (glwthread_thread_t thread, void **retvalp);
  47 extern int glwthread_thread_detach (glwthread_thread_t thread);
  48 extern glwthread_thread_t glwthread_thread_self (void);
  49 extern _Noreturn void glwthread_thread_exit (void *retval);
  50
  51 #ifdef __cplusplus
  52 }
  53 #endif
  54
  55 #endif /* _WINDOWS_THREAD_H */