libguile/async.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_ASYNC_H
   4 #define SCM_ASYNC_H
   5
   6 /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2004, 2005, 2006, 2008 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  */
  23
  24 \f
  25
  26 #include "libguile/__scm.h"
  27 #include "libguile/root.h"
  28 #include "libguile/threads.h"
  29
  30 \f
  31
  32 #define scm_mask_ints (SCM_I_CURRENT_THREAD->block_asyncs != 0)
  33
  34 \f
  35
  36 SCM_API void scm_async_click (void);
  37 SCM_API void scm_switch (void);
  38 SCM_API SCM scm_async (SCM thunk);
  39 SCM_API SCM scm_async_mark (SCM a);
  40 SCM_API SCM scm_system_async_mark (SCM a);
  41 SCM_API SCM scm_system_async_mark_for_thread (SCM a, SCM thread);
  42 SCM_INTERNAL void scm_i_queue_async_cell (SCM cell, scm_i_thread *);
  43 SCM_INTERNAL int scm_i_setup_sleep (scm_i_thread *,
  44                                     SCM obj, scm_i_pthread_mutex_t *m,
  45                                     int fd);
  46 SCM_INTERNAL void scm_i_reset_sleep (scm_i_thread *);
  47 SCM_API SCM scm_run_asyncs (SCM list_of_a);
  48 SCM_API SCM scm_noop (SCM args);
  49 SCM_API SCM scm_call_with_blocked_asyncs (SCM proc);
  50 SCM_API SCM scm_call_with_unblocked_asyncs (SCM proc);
  51 void *scm_c_call_with_blocked_asyncs (void *(*p) (void *d), void *d);
  52 void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d);
  53 void scm_dynwind_block_asyncs (void);
  54 void scm_dynwind_unblock_asyncs (void);
  55
  56 /* Critical sections */
  57
  58 /* XXX - every critical section needs to be examined whether the
  59    requirements for SCM_CRITICAL_SECTION_START/END are fulfilled.  See
  60    the manual.
  61 */
  62
  63 /* Defined in threads.c. */
  64 extern scm_i_pthread_mutex_t scm_i_critical_section_mutex;
  65
  66 #define SCM_CRITICAL_SECTION_START \
  67   do { \
  68     scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex);\
  69     SCM_I_CURRENT_THREAD->block_asyncs++; \
  70     SCM_I_CURRENT_THREAD->critical_section_level++; \
  71   } while (0)
  72 #define SCM_CRITICAL_SECTION_END \
  73   do { \
  74     SCM_I_CURRENT_THREAD->critical_section_level--; \
  75     SCM_I_CURRENT_THREAD->block_asyncs--; \
  76     scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \
  77     scm_async_click (); \
  78   } while (0)
  79
  80 SCM_INTERNAL void scm_init_async (void);
  81
  82 #if (SCM_ENABLE_DEPRECATED == 1)
  83
  84 SCM_API SCM scm_system_async (SCM thunk);
  85 SCM_API SCM scm_unmask_signals (void);
  86 SCM_API SCM scm_mask_signals (void);
  87
  88 #endif
  89
  90 #endif  /* SCM_ASYNC_H */
  91
  92 /*
  93   Local Variables:
  94   c-file-style: "gnu"
  95   End:
  96 */