diff options
author | Andy Wingo <wingo@pobox.com> | 2012-02-23 14:18:56 +0100 |
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committer | Andy Wingo <wingo@pobox.com> | 2012-02-23 14:18:56 +0100 |
commit | 81b80b9610798ea910daad78cf525dec211639f9 (patch) | |
tree | 4a1ecf3f8e70132c133f54acc2413b2547cf0931 /libguile/weak-set.c | |
parent | 44b76a785ce075df07e6af1c2bf7d5ad3f4e3d4f (diff) | |
download | guile-81b80b9610798ea910daad78cf525dec211639f9.tar.gz |
Revert "with a threaded guile, lock weak sets and tables during a fork"
This reverts commit f609480611cfd1585409fd6b1b90beb730b026cf.
Diffstat (limited to 'libguile/weak-set.c')
-rw-r--r-- | libguile/weak-set.c | 108 |
1 files changed, 13 insertions, 95 deletions
diff --git a/libguile/weak-set.c b/libguile/weak-set.c index 249c703d2..bdabedf9d 100644 --- a/libguile/weak-set.c +++ b/libguile/weak-set.c @@ -650,74 +650,6 @@ weak_set_remove_x (scm_t_weak_set *set, unsigned long hash, - -static void -lock_weak_set (scm_t_weak_set *set) -{ - scm_i_pthread_mutex_lock (&set->lock); -} - -static void -unlock_weak_set (scm_t_weak_set *set) -{ - scm_i_pthread_mutex_unlock (&set->lock); -} - -/* A weak set of weak sets, for use in the pthread_atfork handler. */ -static SCM all_weak_sets = SCM_BOOL_F; - -#if SCM_USE_PTHREAD_THREADS - -static void -lock_all_weak_sets (void) -{ - scm_t_weak_set *s; - scm_t_weak_entry *entries; - unsigned long k, size; - scm_t_weak_entry copy; - - s = SCM_WEAK_SET (all_weak_sets); - lock_weak_set (s); - size = s->size; - entries = s->entries; - - for (k = 0; k < size; k++) - if (entries[k].hash) - { - copy_weak_entry (&entries[k], ©); - if (copy.key) - lock_weak_set (SCM_WEAK_SET (SCM_PACK (copy.key))); - } -} - -static void -unlock_all_weak_sets (void) -{ - scm_t_weak_set *s; - scm_t_weak_entry *entries; - unsigned long k, size; - scm_t_weak_entry copy; - - s = SCM_WEAK_SET (all_weak_sets); - size = s->size; - entries = s->entries; - - for (k = 0; k < size; k++) - if (entries[k].hash) - { - copy_weak_entry (&entries[k], ©); - if (copy.key) - unlock_weak_set (SCM_WEAK_SET (SCM_PACK (copy.key))); - } - - unlock_weak_set (s); -} - -#endif /* SCM_USE_PTHREAD_THREADS */ - - - - static SCM make_weak_set (unsigned long k) { @@ -764,7 +696,7 @@ do_vacuum_weak_set (SCM set) if (scm_i_pthread_mutex_trylock (&s->lock) == 0) { vacuum_weak_set (s); - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); } return; @@ -829,9 +761,6 @@ scm_c_make_weak_set (unsigned long k) scm_c_register_weak_gc_callback (ret, do_vacuum_weak_set); - if (scm_is_true (all_weak_sets)) - scm_weak_set_add_x (all_weak_sets, ret); - return ret; } @@ -846,12 +775,12 @@ scm_weak_set_clear_x (SCM set) { scm_t_weak_set *s = SCM_WEAK_SET (set); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); memset (s->entries, 0, sizeof (scm_t_weak_entry) * s->size); s->n_items = 0; - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); return SCM_UNSPECIFIED; } @@ -864,11 +793,11 @@ scm_c_weak_set_lookup (SCM set, unsigned long raw_hash, SCM ret; scm_t_weak_set *s = SCM_WEAK_SET (set); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); ret = weak_set_lookup (s, raw_hash, pred, closure, dflt); - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); return ret; } @@ -881,11 +810,11 @@ scm_c_weak_set_add_x (SCM set, unsigned long raw_hash, SCM ret; scm_t_weak_set *s = SCM_WEAK_SET (set); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); ret = weak_set_add_x (s, raw_hash, pred, closure, obj); - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); return ret; } @@ -897,11 +826,11 @@ scm_c_weak_set_remove_x (SCM set, unsigned long raw_hash, { scm_t_weak_set *s = SCM_WEAK_SET (set); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); weak_set_remove_x (s, raw_hash, pred, closure); - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); } static int @@ -936,7 +865,7 @@ scm_c_weak_set_fold (scm_t_set_fold_fn proc, void *closure, s = SCM_WEAK_SET (set); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); size = s->size; entries = s->entries; @@ -952,14 +881,14 @@ scm_c_weak_set_fold (scm_t_set_fold_fn proc, void *closure, if (copy.key) { /* Release set lock while we call the function. */ - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); init = proc (closure, SCM_PACK (copy.key), init); - lock_weak_set (s); + scm_i_pthread_mutex_lock (&s->lock); } } } - unlock_weak_set (s); + scm_i_pthread_mutex_unlock (&s->lock); return init; } @@ -1004,17 +933,6 @@ scm_weak_set_map_to_list (SCM proc, SCM set) } - - -void -scm_weak_set_prehistory (void) -{ -#if SCM_USE_PTHREAD_THREADS - all_weak_sets = scm_c_make_weak_set (0); - pthread_atfork (lock_all_weak_sets, unlock_all_weak_sets, unlock_all_weak_sets); -#endif -} - void scm_init_weak_set () { |