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221 lines
6.8 KiB
C
221 lines
6.8 KiB
C
/* classes: h_files */
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#ifndef SCM_THREADS_H
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#define SCM_THREADS_H
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/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#include "libguile/procs.h"
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#include "libguile/throw.h"
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#include "libguile/root.h"
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#include "libguile/iselect.h"
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#include "libguile/dynwind.h"
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#if SCM_USE_PTHREAD_THREADS
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#include "libguile/pthread-threads.h"
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#endif
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#if SCM_USE_NULL_THREADS
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#include "libguile/null-threads.h"
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#endif
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/* smob tags for the thread datatypes */
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SCM_API scm_t_bits scm_tc16_thread;
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SCM_API scm_t_bits scm_tc16_mutex;
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SCM_API scm_t_bits scm_tc16_condvar;
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typedef struct scm_i_thread {
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struct scm_i_thread *next_thread;
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SCM handle;
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scm_i_pthread_t pthread;
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SCM join_queue;
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SCM result;
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int exited;
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SCM sleep_object;
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scm_i_pthread_mutex_t *sleep_mutex;
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scm_i_pthread_cond_t sleep_cond;
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int sleep_fd, sleep_pipe[2];
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/* This mutex represents this threads right to access the heap.
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That right can temporarily be taken away by the GC.
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*/
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scm_i_pthread_mutex_t heap_mutex;
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/* The freelists of this thread. Each thread has its own lists so
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that they can all allocate concurrently.
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*/
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SCM freelist, freelist2;
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int clear_freelists_p; /* set if GC was done while thread was asleep */
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int gc_running_p; /* non-zero while this thread does GC or a
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sweep. */
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/* Other thread local things.
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*/
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SCM dynamic_state;
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scm_t_debug_frame *last_debug_frame;
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SCM dynwinds;
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/* For system asyncs.
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*/
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SCM active_asyncs; /* The thunks to be run at the next
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safe point */
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unsigned int block_asyncs; /* Non-zero means that asyncs should
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not be run. */
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unsigned int pending_asyncs; /* Non-zero means that asyncs might be pending.
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*/
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/* The current continuation root and the stack base for it.
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The continuation root is an arbitrary but unique object that
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identifies a dynamic extent. Continuations created during that
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extent can also only be invoked during it.
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We use pairs where the car is the thread handle and the cdr links
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to the previous pair. This might be used for better error
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messages but is not essential for identifying continuation roots.
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The continuation base is the far end of the stack upto which it
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needs to be copied.
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*/
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SCM continuation_root;
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SCM_STACKITEM *continuation_base;
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/* For keeping track of the stack and registers. */
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SCM_STACKITEM *base;
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SCM_STACKITEM *top;
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jmp_buf regs;
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} scm_i_thread;
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#define SCM_I_IS_THREAD(x) SCM_SMOB_PREDICATE (scm_tc16_thread, x)
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#define SCM_I_THREAD_DATA(x) ((scm_i_thread *) SCM_SMOB_DATA (x))
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#define SCM_VALIDATE_THREAD(pos, a) \
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scm_assert_smob_type (scm_tc16_thread, (a))
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#define SCM_VALIDATE_MUTEX(pos, a) \
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scm_assert_smob_type (scm_tc16_mutex, (a))
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#define SCM_VALIDATE_CONDVAR(pos, a) \
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scm_assert_smob_type (scm_tc16_condvar, (a))
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SCM_API SCM scm_spawn_thread (scm_t_catch_body body, void *body_data,
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scm_t_catch_handler handler, void *handler_data);
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typedef void *scm_t_guile_ticket;
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SCM_API void scm_enter_guile (scm_t_guile_ticket ticket);
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SCM_API scm_t_guile_ticket scm_leave_guile (void);
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SCM_API void *scm_without_guile (void *(*func)(void *), void *data);
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SCM_API void *scm_with_guile (void *(*func)(void *), void *data);
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SCM_API void *scm_i_with_guile_and_parent (void *(*func)(void *), void *data,
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SCM parent);
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extern int scm_i_thread_go_to_sleep;
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void scm_i_thread_put_to_sleep (void);
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void scm_i_thread_wake_up (void);
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void scm_i_thread_invalidate_freelists (void);
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void scm_i_thread_sleep_for_gc (void);
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void scm_threads_prehistory (SCM_STACKITEM *);
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void scm_threads_init_first_thread (void);
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SCM_API void scm_threads_mark_stacks (void);
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SCM_API void scm_init_threads (void);
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SCM_API void scm_init_thread_procs (void);
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SCM_API void scm_init_threads_default_dynamic_state (void);
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#define SCM_THREAD_SWITCHING_CODE \
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do { \
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if (scm_i_thread_go_to_sleep) \
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scm_i_thread_sleep_for_gc (); \
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} while (0)
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SCM_API SCM scm_call_with_new_thread (SCM thunk, SCM handler);
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SCM_API SCM scm_yield (void);
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SCM_API SCM scm_join_thread (SCM t);
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SCM_API SCM scm_make_mutex (void);
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SCM_API SCM scm_make_recursive_mutex (void);
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SCM_API SCM scm_lock_mutex (SCM m);
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SCM_API void scm_frame_lock_mutex (SCM mutex);
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SCM_API SCM scm_try_mutex (SCM m);
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SCM_API SCM scm_unlock_mutex (SCM m);
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SCM_API SCM scm_make_condition_variable (void);
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SCM_API SCM scm_wait_condition_variable (SCM cond, SCM mutex);
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SCM_API SCM scm_timed_wait_condition_variable (SCM cond, SCM mutex,
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SCM abstime);
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SCM_API SCM scm_signal_condition_variable (SCM cond);
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SCM_API SCM scm_broadcast_condition_variable (SCM cond);
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SCM_API SCM scm_current_thread (void);
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SCM_API SCM scm_all_threads (void);
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SCM_API int scm_c_thread_exited_p (SCM thread);
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SCM_API SCM scm_thread_exited_p (SCM thread);
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SCM_API void scm_frame_critical_section (SCM mutex);
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#define SCM_I_CURRENT_THREAD \
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((scm_i_thread *) scm_i_pthread_getspecific (scm_i_thread_key))
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SCM_API scm_i_pthread_key_t scm_i_thread_key;
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#define scm_i_dynwinds() (SCM_I_CURRENT_THREAD->dynwinds)
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#define scm_i_set_dynwinds(w) (SCM_I_CURRENT_THREAD->dynwinds = (w))
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#define scm_i_last_debug_frame() (SCM_I_CURRENT_THREAD->last_debug_frame)
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#define scm_i_set_last_debug_frame(f) \
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(SCM_I_CURRENT_THREAD->last_debug_frame = (f))
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SCM_API scm_i_pthread_mutex_t scm_i_misc_mutex;
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/* Convenience functions for working with the pthread API in guile
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mode.
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*/
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#if SCM_USE_PTHREAD_THREADS
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SCM_API int scm_pthread_mutex_lock (pthread_mutex_t *mutex);
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SCM_API void scm_frame_pthread_mutex_lock (pthread_mutex_t *mutex);
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SCM_API int scm_pthread_cond_wait (pthread_cond_t *cond,
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pthread_mutex_t *mutex);
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SCM_API int scm_pthread_cond_timedwait (pthread_cond_t *cond,
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pthread_mutex_t *mutex,
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const struct timespec *abstime);
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#endif
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/* More convenience functions.
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*/
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SCM_API unsigned int scm_std_sleep (unsigned int);
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SCM_API unsigned long scm_std_usleep (unsigned long);
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#endif /* SCM_THREADS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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