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/* classes: h_files */
#ifndef SCM_ASYNC_H
#define SCM_ASYNC_H
/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2004, 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "libguile/__scm.h"
#include "libguile/root.h"
#include "libguile/threads.h"
SCM_API void scm_async_click (void);
SCM_API void scm_switch (void);
SCM_API SCM scm_async (SCM thunk);
SCM_API SCM scm_async_mark (SCM a);
SCM_API SCM scm_system_async_mark (SCM a);
SCM_API SCM scm_system_async_mark_for_thread (SCM a, SCM thread);
SCM_INTERNAL void scm_i_queue_async_cell (SCM cell, scm_i_thread *);
SCM_INTERNAL int scm_i_setup_sleep (scm_i_thread *,
SCM obj, scm_i_pthread_mutex_t *m,
int fd);
SCM_INTERNAL void scm_i_reset_sleep (scm_i_thread *);
SCM_API SCM scm_run_asyncs (SCM list_of_a);
SCM_API SCM scm_noop (SCM args);
SCM_API SCM scm_call_with_blocked_asyncs (SCM proc);
SCM_API SCM scm_call_with_unblocked_asyncs (SCM proc);
void *scm_c_call_with_blocked_asyncs (void *(*p) (void *d), void *d);
void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d);
void scm_dynwind_block_asyncs (void);
void scm_dynwind_unblock_asyncs (void);
/* Critical sections */
/* XXX - every critical section needs to be examined whether the
requirements for SCM_CRITICAL_SECTION_START/END are fulfilled. See
the manual.
*/
/* Defined in threads.c. */
SCM_INTERNAL scm_i_pthread_mutex_t scm_i_critical_section_mutex;
SCM_API void scm_critical_section_start (void);
SCM_API void scm_critical_section_end (void);
#ifdef BUILDING_LIBGUILE
# define SCM_CRITICAL_SECTION_START \
do { \
scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex); \
SCM_I_CURRENT_THREAD->block_asyncs++; \
SCM_I_CURRENT_THREAD->critical_section_level++; \
} while (0)
# define SCM_CRITICAL_SECTION_END \
do { \
SCM_I_CURRENT_THREAD->critical_section_level--; \
SCM_I_CURRENT_THREAD->block_asyncs--; \
scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \
scm_async_click (); \
} while (0)
# define scm_i_pthread_mutex_lock_block_asyncs(m) \
do \
{ \
SCM_I_CURRENT_THREAD->block_asyncs++; \
scm_i_pthread_mutex_lock (m); \
} \
while (0)
# define scm_i_pthread_mutex_unlock_unblock_asyncs(m) \
do \
{ \
scm_i_pthread_mutex_unlock (m); \
SCM_I_CURRENT_THREAD->block_asyncs--; \
} \
while (0)
#else /* !BUILDING_LIBGUILE */
# define SCM_CRITICAL_SECTION_START scm_critical_section_start ()
# define SCM_CRITICAL_SECTION_END scm_critical_section_end ()
#endif /* !BUILDING_LIBGUILE */
SCM_INTERNAL void scm_init_async (void);
#if (SCM_ENABLE_DEPRECATED == 1)
SCM_DEPRECATED SCM scm_system_async (SCM thunk);
SCM_DEPRECATED SCM scm_unmask_signals (void);
SCM_DEPRECATED SCM scm_mask_signals (void);
#endif
#endif /* SCM_ASYNC_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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