src/systhread.h

   1 /* System thread definitions
   2    Copyright (C) 2012, 2013 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef SYSTHREAD_H
  20 #define SYSTHREAD_H
  21
  22 #ifdef THREADS_ENABLED
  23
  24 #ifdef HAVE_PTHREAD
  25
  26 #include <pthread.h>
  27
  28 /* A system mutex is just a pthread mutex.  This is only used for the
  29    GIL.  */
  30 typedef pthread_mutex_t sys_mutex_t;
  31
  32 typedef pthread_cond_t sys_cond_t;
  33
  34 /* A system thread.  */
  35 typedef pthread_t sys_thread_t;
  36
  37 #else /* HAVE_PTHREAD */
  38
  39 #error port me
  40
  41 #endif /* HAVE_PTHREAD */
  42
  43 #else /* THREADS_ENABLED */
  44
  45 /* For the no-threads case we can simply use dummy definitions.  */
  46 typedef int sys_mutex_t;
  47 typedef int sys_cond_t;
  48 typedef int sys_thread_t;
  49
  50 #endif /* THREADS_ENABLED */
  51
  52 typedef void *(thread_creation_function) (void *);
  53
  54 extern void sys_mutex_init (sys_mutex_t *);
  55 extern void sys_mutex_lock (sys_mutex_t *);
  56 extern void sys_mutex_unlock (sys_mutex_t *);
  57 extern void sys_mutex_destroy (sys_mutex_t *);
  58
  59 extern void sys_cond_init (sys_cond_t *);
  60 extern void sys_cond_wait (sys_cond_t *, sys_mutex_t *);
  61 extern void sys_cond_signal (sys_cond_t *);
  62 extern void sys_cond_broadcast (sys_cond_t *);
  63 extern void sys_cond_destroy (sys_cond_t *);
  64
  65 extern sys_thread_t sys_thread_self (void);
  66 extern int sys_thread_equal (sys_thread_t, sys_thread_t);
  67
  68 extern int sys_thread_create (sys_thread_t *, const char *,
  69                               thread_creation_function *,
  70                               void *);
  71
  72 extern void sys_thread_yield (void);
  73
  74 #endif /* SYSTHREAD_H */