coroutine.h

   1 /*
   2  * GTK VNC Widget
   3  *
   4  * Copyright (C) 2006  Anthony Liguori <anthony@codemonkey.ws>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.0 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifndef _COROUTINE_H_
  22 #define _COROUTINE_H_
  23
  24 #define WITH_UCONTEXT 1
  25
  26 #if WITH_UCONTEXT
  27 #include "continuation.h"
  28 #else
  29 #include <glib.h>
  30 #endif
  31
  32 struct coroutine
  33 {
  34         size_t stack_size;
  35         void *(*entry)(void *);
  36         int (*release)(struct coroutine *);
  37
  38         /* read-only */
  39         int exited;
  40
  41         /* private */
  42         struct coroutine *caller;
  43         void *data;
  44
  45 #if WITH_UCONTEXT
  46         struct continuation cc;
  47 #else
  48         GThread *thread;
  49         gboolean runnable;
  50 #endif
  51 };
  52
  53 int coroutine_init(struct coroutine *co);
  54
  55 int coroutine_release(struct coroutine *co);
  56
  57 void *coroutine_swap(struct coroutine *from, struct coroutine *to, void *arg);
  58
  59 struct coroutine *coroutine_self(void);
  60
  61 int coroutine_is_leader(struct coroutine *co);
  62
  63 void *coroutine_yieldto(struct coroutine *to, void *arg);
  64
  65 void *coroutine_yield(void *arg);
  66
  67 #endif
  68 /*
  69  * Local variables:
  70  *  c-indent-level: 8
  71  *  c-basic-offset: 8
  72  *  tab-width: 8
  73  * End:
  74  */