#ifndef SCM_THREADS_H
#define SCM_THREADS_H
-/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004, 2006, 2007 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
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
\f
#include "libguile/throw.h"
#include "libguile/root.h"
#include "libguile/iselect.h"
+#include "libguile/dynwind.h"
-#include <pthread.h>
+#if SCM_USE_PTHREAD_THREADS
+#include "libguile/pthread-threads.h"
+#endif
+
+#if SCM_USE_NULL_THREADS
+#include "libguile/null-threads.h"
+#endif
\f
SCM_API scm_t_bits scm_tc16_mutex;
SCM_API scm_t_bits scm_tc16_condvar;
-typedef struct scm_thread {
- struct scm_thread *next_thread;
+typedef struct scm_i_thread {
+ struct scm_i_thread *next_thread;
- /* For general blocking.
- */
- pthread_cond_t sleep_cond;
+ SCM handle;
+ scm_i_pthread_t pthread;
+
+ SCM cleanup_handler;
+ SCM join_queue;
+ SCM result;
+ int canceled;
+ int exited;
+
+ SCM sleep_object;
+ scm_i_pthread_mutex_t *sleep_mutex;
+ scm_i_pthread_cond_t sleep_cond;
+ int sleep_fd, sleep_pipe[2];
/* This mutex represents this threads right to access the heap.
That right can temporarily be taken away by the GC.
*/
- pthread_mutex_t heap_mutex;
+ scm_i_pthread_mutex_t heap_mutex;
+
+ /* The freelists of this thread. Each thread has its own lists so
+ that they can all allocate concurrently.
+ */
SCM freelist, freelist2;
int clear_freelists_p; /* set if GC was done while thread was asleep */
-
- SCM root;
+ int gc_running_p; /* non-zero while this thread does GC or a
+ sweep. */
- SCM handle;
- pthread_t pthread;
- SCM result;
- int exited;
+ /* Other thread local things.
+ */
+ SCM dynamic_state;
+ scm_t_debug_frame *last_debug_frame;
+ SCM dynwinds;
+
+ /* For system asyncs.
+ */
+ SCM active_asyncs; /* The thunks to be run at the next
+ safe point */
+ unsigned int block_asyncs; /* Non-zero means that asyncs should
+ not be run. */
+ unsigned int pending_asyncs; /* Non-zero means that asyncs might be pending.
+ */
+
+ /* The current continuation root and the stack base for it.
+
+ The continuation root is an arbitrary but unique object that
+ identifies a dynamic extent. Continuations created during that
+ extent can also only be invoked during it.
+
+ We use pairs where the car is the thread handle and the cdr links
+ to the previous pair. This might be used for better error
+ messages but is not essential for identifying continuation roots.
+
+ The continuation base is the far end of the stack upto which it
+ needs to be copied.
+ */
+ SCM continuation_root;
+ SCM_STACKITEM *continuation_base;
/* For keeping track of the stack and registers. */
SCM_STACKITEM *base;
SCM_STACKITEM *top;
jmp_buf regs;
-} scm_thread;
-
-#define SCM_THREADP(x) SCM_SMOB_PREDICATE (scm_tc16_thread, x)
-#define SCM_THREAD_DATA(x) ((scm_thread *) SCM_SMOB_DATA (x))
+} scm_i_thread;
-#define SCM_MUTEXP(x) SCM_SMOB_PREDICATE (scm_tc16_mutex, x)
-#define SCM_MUTEX_DATA(x) ((void *) SCM_SMOB_DATA (x))
-
-#define SCM_CONDVARP(x) SCM_SMOB_PREDICATE (scm_tc16_condvar, x)
-#define SCM_CONDVAR_DATA(x) ((void *) SCM_SMOB_DATA (x))
+#define SCM_I_IS_THREAD(x) SCM_SMOB_PREDICATE (scm_tc16_thread, x)
+#define SCM_I_THREAD_DATA(x) ((scm_i_thread *) SCM_SMOB_DATA (x))
#define SCM_VALIDATE_THREAD(pos, a) \
- SCM_MAKE_VALIDATE_MSG (pos, a, THREADP, "thread")
-
+ scm_assert_smob_type (scm_tc16_thread, (a))
#define SCM_VALIDATE_MUTEX(pos, a) \
- SCM_ASSERT_TYPE (SCM_MUTEXP (a), \
- a, pos, FUNC_NAME, "mutex");
-
+ scm_assert_smob_type (scm_tc16_mutex, (a))
#define SCM_VALIDATE_CONDVAR(pos, a) \
- SCM_ASSERT_TYPE (SCM_CONDVARP (a), \
- a, pos, FUNC_NAME, "condition variable");
+ scm_assert_smob_type (scm_tc16_condvar, (a))
SCM_API SCM scm_spawn_thread (scm_t_catch_body body, void *body_data,
scm_t_catch_handler handler, void *handler_data);
-/* The application must scm_leave_guile() before entering any piece of
- code which can block.
- */
-
-SCM_API void scm_enter_guile (void);
-SCM_API void scm_leave_guile (void);
-
-SCM_API void *scm_with_guile (void *(*func)(void *), void *data);
SCM_API void *scm_without_guile (void *(*func)(void *), void *data);
+SCM_API void *scm_with_guile (void *(*func)(void *), void *data);
+
SCM_API void *scm_i_with_guile_and_parent (void *(*func)(void *), void *data,
SCM parent);
-/* Critical sections */
-
-/* This is the generic critical section for places where we are too
- lazy to allocate a specific mutex. */
-extern pthread_mutex_t scm_i_critical_section_mutex;
-
-#define SCM_CRITICAL_SECTION_START \
- scm_pthread_mutex_lock (&scm_i_critical_section_mutex)
-#define SCM_CRITICAL_SECTION_END \
- pthread_mutex_unlock (&scm_i_critical_section_mutex)
extern int scm_i_thread_go_to_sleep;
void scm_i_thread_wake_up (void);
void scm_i_thread_invalidate_freelists (void);
void scm_i_thread_sleep_for_gc (void);
+
void scm_threads_prehistory (SCM_STACKITEM *);
void scm_threads_init_first_thread (void);
SCM_API void scm_threads_mark_stacks (void);
SCM_API void scm_init_threads (void);
SCM_API void scm_init_thread_procs (void);
-SCM_API void scm_init_threads_root_root (void);
+SCM_API void scm_init_threads_default_dynamic_state (void);
+
#define SCM_THREAD_SWITCHING_CODE \
do { \
scm_i_thread_sleep_for_gc (); \
} while (0)
-SCM scm_i_create_thread (scm_t_catch_body body, void *body_data,
- scm_t_catch_handler handler, void *handler_data,
- SCM protects);
-
-/* The C versions of the Scheme-visible thread functions. */
SCM_API SCM scm_call_with_new_thread (SCM thunk, SCM handler);
SCM_API SCM scm_yield (void);
+SCM_API SCM scm_cancel_thread (SCM t);
+SCM_API SCM scm_set_thread_cleanup_x (SCM thread, SCM proc);
+SCM_API SCM scm_thread_cleanup (SCM thread);
SCM_API SCM scm_join_thread (SCM t);
+
SCM_API SCM scm_make_mutex (void);
SCM_API SCM scm_make_recursive_mutex (void);
SCM_API SCM scm_lock_mutex (SCM m);
+SCM_API void scm_dynwind_lock_mutex (SCM mutex);
SCM_API SCM scm_try_mutex (SCM m);
SCM_API SCM scm_unlock_mutex (SCM m);
+
SCM_API SCM scm_make_condition_variable (void);
SCM_API SCM scm_wait_condition_variable (SCM cond, SCM mutex);
SCM_API SCM scm_timed_wait_condition_variable (SCM cond, SCM mutex,
SCM_API int scm_c_thread_exited_p (SCM thread);
SCM_API SCM scm_thread_exited_p (SCM thread);
-SCM_API scm_root_state *scm_i_thread_root (SCM thread);
+SCM_API void scm_dynwind_critical_section (SCM mutex);
+
+#define SCM_I_CURRENT_THREAD \
+ ((scm_i_thread *) scm_i_pthread_getspecific (scm_i_thread_key))
+SCM_API scm_i_pthread_key_t scm_i_thread_key;
-#define SCM_CURRENT_THREAD \
- ((scm_thread *) pthread_getspecific (scm_i_thread_key))
-SCM_API pthread_key_t scm_i_thread_key;
+#define scm_i_dynwinds() (SCM_I_CURRENT_THREAD->dynwinds)
+#define scm_i_set_dynwinds(w) (SCM_I_CURRENT_THREAD->dynwinds = (w))
+#define scm_i_last_debug_frame() (SCM_I_CURRENT_THREAD->last_debug_frame)
+#define scm_i_set_last_debug_frame(f) \
+ (SCM_I_CURRENT_THREAD->last_debug_frame = (f))
-SCM_API pthread_mutex_t scm_i_misc_mutex;
+SCM_API scm_i_pthread_mutex_t scm_i_misc_mutex;
/* Convenience functions for working with the pthread API in guile
mode.
*/
+#if SCM_USE_PTHREAD_THREADS
SCM_API int scm_pthread_mutex_lock (pthread_mutex_t *mutex);
-SCM_API void scm_frame_pthread_mutex_lock (pthread_mutex_t *mutex);
+SCM_API void scm_dynwind_pthread_mutex_lock (pthread_mutex_t *mutex);
SCM_API int scm_pthread_cond_wait (pthread_cond_t *cond,
pthread_mutex_t *mutex);
SCM_API int scm_pthread_cond_timedwait (pthread_cond_t *cond,
pthread_mutex_t *mutex,
const struct timespec *abstime);
-SCM_API unsigned long scm_thread_sleep (unsigned long);
-SCM_API unsigned long scm_thread_usleep (unsigned long);
+#endif
+
+/* More convenience functions.
+ */
+
+SCM_API unsigned int scm_std_sleep (unsigned int);
+SCM_API unsigned long scm_std_usleep (unsigned long);
#endif /* SCM_THREADS_H */
HCoop / bpt / guile.git / blobdiff