6 /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2004, 2005, 2006, 2008, 2009, 2011 Free Software Foundation, Inc.
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.
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.
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
26 #include "libguile/__scm.h"
27 #include "libguile/root.h"
28 #include "libguile/threads.h"
32 SCM_API
void scm_async_tick (void);
33 SCM_API
void scm_switch (void);
34 SCM_API SCM
scm_async (SCM thunk
);
35 SCM_API SCM
scm_async_mark (SCM a
);
36 SCM_API SCM
scm_system_async_mark (SCM a
);
37 SCM_API SCM
scm_system_async_mark_for_thread (SCM a
, SCM thread
);
38 SCM_INTERNAL
void scm_i_queue_async_cell (SCM cell
, scm_i_thread
*);
39 SCM_INTERNAL
int scm_i_setup_sleep (scm_i_thread
*,
40 SCM obj
, scm_i_pthread_mutex_t
*m
,
42 SCM_INTERNAL
void scm_i_reset_sleep (scm_i_thread
*);
43 SCM_API SCM
scm_run_asyncs (SCM list_of_a
);
44 SCM_API SCM
scm_noop (SCM args
);
45 SCM_API SCM
scm_call_with_blocked_asyncs (SCM proc
);
46 SCM_API SCM
scm_call_with_unblocked_asyncs (SCM proc
);
47 void *scm_c_call_with_blocked_asyncs (void *(*p
) (void *d
), void *d
);
48 void *scm_c_call_with_unblocked_asyncs (void *(*p
) (void *d
), void *d
);
49 void scm_dynwind_block_asyncs (void);
50 void scm_dynwind_unblock_asyncs (void);
52 /* Critical sections */
54 /* XXX - every critical section needs to be examined whether the
55 requirements for SCM_CRITICAL_SECTION_START/END are fulfilled. See
59 /* Defined in threads.c. */
60 SCM_INTERNAL scm_i_pthread_mutex_t scm_i_critical_section_mutex
;
62 SCM_API
void scm_critical_section_start (void);
63 SCM_API
void scm_critical_section_end (void);
65 #ifdef BUILDING_LIBGUILE
67 # define SCM_CRITICAL_SECTION_START \
69 scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex); \
70 SCM_I_CURRENT_THREAD->block_asyncs++; \
71 SCM_I_CURRENT_THREAD->critical_section_level++; \
73 # define SCM_CRITICAL_SECTION_END \
75 SCM_I_CURRENT_THREAD->critical_section_level--; \
76 SCM_I_CURRENT_THREAD->block_asyncs--; \
77 scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \
81 # define scm_i_pthread_mutex_lock_block_asyncs(m) \
84 SCM_I_CURRENT_THREAD->block_asyncs++; \
85 scm_i_pthread_mutex_lock (m); \
89 # define scm_i_pthread_mutex_unlock_unblock_asyncs(m) \
92 scm_i_pthread_mutex_unlock (m); \
93 SCM_I_CURRENT_THREAD->block_asyncs--; \
97 #else /* !BUILDING_LIBGUILE */
99 # define SCM_CRITICAL_SECTION_START scm_critical_section_start ()
100 # define SCM_CRITICAL_SECTION_END scm_critical_section_end ()
102 #endif /* !BUILDING_LIBGUILE */
104 SCM_INTERNAL
void scm_init_async (void);
106 #endif /* SCM_ASYNC_H */