From: Mathieu Desnoyers Date: Sat, 3 Sep 2011 15:37:47 +0000 (-0400) Subject: Use cds_lfht namespace for lock-free hash table X-Git-Tag: v0.7.0~43^2~189 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=14044b37bb7ba51676f1c3f139facae9b06dbc51;p=urcu.git Use cds_lfht namespace for lock-free hash table Signed-off-by: Mathieu Desnoyers --- diff --git a/rculfhash.c b/rculfhash.c index 380665b..9aeb3e7 100644 --- a/rculfhash.c +++ b/rculfhash.c @@ -139,23 +139,23 @@ struct rcu_table { unsigned long resize_target; int resize_initiated; struct rcu_head head; - struct _rcu_ht_node *tbl[0]; + struct _cds_lfht_node *tbl[0]; }; -struct rcu_ht { +struct cds_lfht { struct rcu_table *t; /* shared */ - ht_hash_fct hash_fct; - ht_compare_fct compare_fct; + cds_lfht_hash_fct hash_fct; + cds_lfht_compare_fct compare_fct; unsigned long hash_seed; pthread_mutex_t resize_mutex; /* resize mutex: add/del mutex */ unsigned int in_progress_resize, in_progress_destroy; - void (*ht_call_rcu)(struct rcu_head *head, + void (*cds_lfht_call_rcu)(struct rcu_head *head, void (*func)(struct rcu_head *head)); }; struct rcu_resize_work { struct rcu_head head; - struct rcu_ht *ht; + struct cds_lfht *ht; }; /* @@ -351,48 +351,48 @@ int get_count_order_ulong(unsigned long x) } static -void ht_resize_lazy(struct rcu_ht *ht, struct rcu_table *t, int growth); +void cds_lfht_resize_lazy(struct cds_lfht *ht, struct rcu_table *t, int growth); static -void check_resize(struct rcu_ht *ht, struct rcu_table *t, +void check_resize(struct cds_lfht *ht, struct rcu_table *t, uint32_t chain_len) { if (chain_len > 100) dbg_printf("WARNING: large chain length: %u.\n", chain_len); if (chain_len >= CHAIN_LEN_RESIZE_THRESHOLD) - ht_resize_lazy(ht, t, + cds_lfht_resize_lazy(ht, t, get_count_order_u32(chain_len - (CHAIN_LEN_TARGET - 1))); } static -struct rcu_ht_node *clear_flag(struct rcu_ht_node *node) +struct cds_lfht_node *clear_flag(struct cds_lfht_node *node) { - return (struct rcu_ht_node *) (((unsigned long) node) & ~FLAGS_MASK); + return (struct cds_lfht_node *) (((unsigned long) node) & ~FLAGS_MASK); } static -int is_removed(struct rcu_ht_node *node) +int is_removed(struct cds_lfht_node *node) { return ((unsigned long) node) & REMOVED_FLAG; } static -struct rcu_ht_node *flag_removed(struct rcu_ht_node *node) +struct cds_lfht_node *flag_removed(struct cds_lfht_node *node) { - return (struct rcu_ht_node *) (((unsigned long) node) | REMOVED_FLAG); + return (struct cds_lfht_node *) (((unsigned long) node) | REMOVED_FLAG); } static -int is_dummy(struct rcu_ht_node *node) +int is_dummy(struct cds_lfht_node *node) { return ((unsigned long) node) & DUMMY_FLAG; } static -struct rcu_ht_node *flag_dummy(struct rcu_ht_node *node) +struct cds_lfht_node *flag_dummy(struct cds_lfht_node *node) { - return (struct rcu_ht_node *) (((unsigned long) node) | DUMMY_FLAG); + return (struct cds_lfht_node *) (((unsigned long) node) | DUMMY_FLAG); } static @@ -413,9 +413,9 @@ unsigned long _uatomic_max(unsigned long *ptr, unsigned long v) * Remove all logically deleted nodes from a bucket up to a certain node key. */ static -void _ht_gc_bucket(struct rcu_ht_node *dummy, struct rcu_ht_node *node) +void _cds_lfht_gc_bucket(struct cds_lfht_node *dummy, struct cds_lfht_node *node) { - struct rcu_ht_node *iter_prev, *iter, *next, *new_next; + struct cds_lfht_node *iter_prev, *iter, *next, *new_next; for (;;) { iter_prev = dummy; @@ -443,12 +443,12 @@ void _ht_gc_bucket(struct rcu_ht_node *dummy, struct rcu_ht_node *node) } static -struct rcu_ht_node *_ht_add(struct rcu_ht *ht, struct rcu_table *t, - struct rcu_ht_node *node, int unique, int dummy) +struct cds_lfht_node *_cds_lfht_add(struct cds_lfht *ht, struct rcu_table *t, + struct cds_lfht_node *node, int unique, int dummy) { - struct rcu_ht_node *iter_prev, *iter, *next, *new_node, *new_next, + struct cds_lfht_node *iter_prev, *iter, *next, *new_node, *new_next, *dummy_node; - struct _rcu_ht_node *lookup; + struct _cds_lfht_node *lookup; unsigned long hash, index, order; if (!t->size) { @@ -467,7 +467,7 @@ struct rcu_ht_node *_ht_add(struct rcu_ht *ht, struct rcu_table *t, index = hash & (t->size - 1); order = get_count_order_ulong(index + 1); lookup = &t->tbl[order][index & ((1UL << (order - 1)) - 1)]; - iter_prev = (struct rcu_ht_node *) lookup; + iter_prev = (struct cds_lfht_node *) lookup; /* We can always skip the dummy node initially */ iter = rcu_dereference(iter_prev->p.next); assert(iter_prev->p.reverse_hash <= node->p.reverse_hash); @@ -523,16 +523,17 @@ gc_end: index = hash & (t->size - 1); order = get_count_order_ulong(index + 1); lookup = &t->tbl[order][index & ((1UL << (order - 1)) - 1)]; - dummy_node = (struct rcu_ht_node *) lookup; - _ht_gc_bucket(dummy_node, node); + dummy_node = (struct cds_lfht_node *) lookup; + _cds_lfht_gc_bucket(dummy_node, node); return node; } static -int _ht_remove(struct rcu_ht *ht, struct rcu_table *t, struct rcu_ht_node *node) +int _cds_lfht_remove(struct cds_lfht *ht, struct rcu_table *t, + struct cds_lfht_node *node) { - struct rcu_ht_node *dummy, *next, *old; - struct _rcu_ht_node *lookup; + struct cds_lfht_node *dummy, *next, *old; + struct _cds_lfht_node *lookup; int flagged = 0; unsigned long hash, index, order; @@ -559,8 +560,8 @@ int _ht_remove(struct rcu_ht *ht, struct rcu_table *t, struct rcu_ht_node *node) index = hash & (t->size - 1); order = get_count_order_ulong(index + 1); lookup = &t->tbl[order][index & ((1UL << (order - 1)) - 1)]; - dummy = (struct rcu_ht_node *) lookup; - _ht_gc_bucket(dummy, node); + dummy = (struct cds_lfht_node *) lookup; + _cds_lfht_gc_bucket(dummy, node); end: /* * Only the flagging action indicated that we (and no other) @@ -574,7 +575,7 @@ end: } static -void init_table(struct rcu_ht *ht, struct rcu_table *t, +void init_table(struct cds_lfht *ht, struct rcu_table *t, unsigned long first_order, unsigned long len_order) { unsigned long i, end_order; @@ -588,15 +589,15 @@ void init_table(struct rcu_ht *ht, struct rcu_table *t, len = !i ? 1 : 1UL << (i - 1); dbg_printf("init order %lu len: %lu\n", i, len); - t->tbl[i] = calloc(len, sizeof(struct _rcu_ht_node)); + t->tbl[i] = calloc(len, sizeof(struct _cds_lfht_node)); for (j = 0; j < len; j++) { dbg_printf("init entry: i %lu j %lu hash %lu\n", i, j, !i ? 0 : (1UL << (i - 1)) + j); - struct rcu_ht_node *new_node = - (struct rcu_ht_node *) &t->tbl[i][j]; + struct cds_lfht_node *new_node = + (struct cds_lfht_node *) &t->tbl[i][j]; new_node->p.reverse_hash = bit_reverse_ulong(!i ? 0 : (1UL << (i - 1)) + j); - (void) _ht_add(ht, t, new_node, 0, 1); + (void) _cds_lfht_add(ht, t, new_node, 0, 1); if (CMM_LOAD_SHARED(ht->in_progress_destroy)) break; } @@ -610,27 +611,27 @@ void init_table(struct rcu_ht *ht, struct rcu_table *t, t->resize_initiated = 0; } -struct rcu_ht *ht_new(ht_hash_fct hash_fct, - ht_compare_fct compare_fct, - unsigned long hash_seed, - unsigned long init_size, - void (*ht_call_rcu)(struct rcu_head *head, - void (*func)(struct rcu_head *head))) +struct cds_lfht *cds_lfht_new(cds_lfht_hash_fct hash_fct, + cds_lfht_compare_fct compare_fct, + unsigned long hash_seed, + unsigned long init_size, + void (*cds_lfht_call_rcu)(struct rcu_head *head, + void (*func)(struct rcu_head *head))) { - struct rcu_ht *ht; + struct cds_lfht *ht; unsigned long order; - ht = calloc(1, sizeof(struct rcu_ht)); + ht = calloc(1, sizeof(struct cds_lfht)); ht->hash_fct = hash_fct; ht->compare_fct = compare_fct; ht->hash_seed = hash_seed; - ht->ht_call_rcu = ht_call_rcu; + ht->cds_lfht_call_rcu = cds_lfht_call_rcu; ht->in_progress_resize = 0; /* this mutex should not nest in read-side C.S. */ pthread_mutex_init(&ht->resize_mutex, NULL); order = get_count_order_ulong(max(init_size, 1)) + 1; - ht->t = calloc(1, sizeof(struct rcu_table) - + (order * sizeof(struct _rcu_ht_node *))); + ht->t = calloc(1, sizeof(struct cds_lfht) + + (order * sizeof(struct _cds_lfht_node *))); ht->t->size = 0; pthread_mutex_lock(&ht->resize_mutex); init_table(ht, ht->t, 0, order); @@ -638,11 +639,11 @@ struct rcu_ht *ht_new(ht_hash_fct hash_fct, return ht; } -struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len) +struct cds_lfht_node *cds_lfht_lookup(struct cds_lfht *ht, void *key, size_t key_len) { struct rcu_table *t; - struct rcu_ht_node *node, *next; - struct _rcu_ht_node *lookup; + struct cds_lfht_node *node, *next; + struct _cds_lfht_node *lookup; unsigned long hash, reverse_hash, index, order; hash = ht->hash_fct(key, key_len, ht->hash_seed); @@ -654,7 +655,7 @@ struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len) lookup = &t->tbl[order][index & ((1UL << (order - 1)) - 1)]; dbg_printf("lookup hash %lu index %lu order %lu aridx %lu\n", hash, index, order, index & ((1UL << (order - 1)) - 1)); - node = (struct rcu_ht_node *) lookup; + node = (struct cds_lfht_node *) lookup; for (;;) { if (unlikely(!node)) break; @@ -674,7 +675,7 @@ struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len) return node; } -void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node) +void cds_lfht_add(struct cds_lfht *ht, struct cds_lfht_node *node) { struct rcu_table *t; unsigned long hash; @@ -683,10 +684,11 @@ void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node) node->p.reverse_hash = bit_reverse_ulong((unsigned long) hash); t = rcu_dereference(ht->t); - (void) _ht_add(ht, t, node, 0, 0); + (void) _cds_lfht_add(ht, t, node, 0, 0); } -struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node) +struct cds_lfht_node *cds_lfht_add_unique(struct cds_lfht *ht, + struct cds_lfht_node *node) { struct rcu_table *t; unsigned long hash; @@ -695,29 +697,29 @@ struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node) node->p.reverse_hash = bit_reverse_ulong((unsigned long) hash); t = rcu_dereference(ht->t); - return _ht_add(ht, t, node, 1, 0); + return _cds_lfht_add(ht, t, node, 1, 0); } -int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node) +int cds_lfht_remove(struct cds_lfht *ht, struct cds_lfht_node *node) { struct rcu_table *t; t = rcu_dereference(ht->t); - return _ht_remove(ht, t, node); + return _cds_lfht_remove(ht, t, node); } static -int ht_delete_dummy(struct rcu_ht *ht) +int cds_lfht_delete_dummy(struct cds_lfht *ht) { struct rcu_table *t; - struct rcu_ht_node *node; - struct _rcu_ht_node *lookup; + struct cds_lfht_node *node; + struct _cds_lfht_node *lookup; unsigned long order, i; t = ht->t; /* Check that the table is empty */ lookup = &t->tbl[0][0]; - node = (struct rcu_ht_node *) lookup; + node = (struct cds_lfht_node *) lookup; do { node = clear_flag(node)->p.next; if (!is_dummy(node)) @@ -744,7 +746,7 @@ int ht_delete_dummy(struct rcu_ht *ht) * Should only be called when no more concurrent readers nor writers can * possibly access the table. */ -int ht_destroy(struct rcu_ht *ht) +int cds_lfht_destroy(struct cds_lfht *ht) { int ret; @@ -752,7 +754,7 @@ int ht_destroy(struct rcu_ht *ht) CMM_STORE_SHARED(ht->in_progress_destroy, 1); while (uatomic_read(&ht->in_progress_resize)) poll(NULL, 0, 100); /* wait for 100ms */ - ret = ht_delete_dummy(ht); + ret = cds_lfht_delete_dummy(ht); if (ret) return ret; free(ht->t); @@ -760,13 +762,13 @@ int ht_destroy(struct rcu_ht *ht) return ret; } -void ht_count_nodes(struct rcu_ht *ht, +void cds_lfht_count_nodes(struct cds_lfht *ht, unsigned long *count, unsigned long *removed) { struct rcu_table *t; - struct rcu_ht_node *node, *next; - struct _rcu_ht_node *lookup; + struct cds_lfht_node *node, *next; + struct _cds_lfht_node *lookup; unsigned long nr_dummy = 0; *count = 0; @@ -775,7 +777,7 @@ void ht_count_nodes(struct rcu_ht *ht, t = rcu_dereference(ht->t); /* Count non-dummy nodes in the table */ lookup = &t->tbl[0][0]; - node = (struct rcu_ht_node *) lookup; + node = (struct cds_lfht_node *) lookup; do { next = rcu_dereference(node->p.next); if (is_removed(next)) { @@ -791,7 +793,7 @@ void ht_count_nodes(struct rcu_ht *ht, } static -void ht_free_table_cb(struct rcu_head *head) +void cds_lfht_free_table_cb(struct rcu_head *head) { struct rcu_table *t = caa_container_of(head, struct rcu_table, head); @@ -800,7 +802,7 @@ void ht_free_table_cb(struct rcu_head *head) /* called with resize mutex held */ static -void _do_ht_resize(struct rcu_ht *ht) +void _do_cds_lfht_resize(struct cds_lfht *ht) { unsigned long new_size, old_size, old_order, new_order; struct rcu_table *new_t, *old_t; @@ -815,15 +817,15 @@ void _do_ht_resize(struct rcu_ht *ht) new_order = get_count_order_ulong(new_size) + 1; dbg_printf("resize from %lu (order %lu) to %lu (order %lu) buckets\n", old_size, old_order, new_size, new_order); - new_t = malloc(sizeof(struct rcu_table) - + (new_order * sizeof(struct _rcu_ht_node *))); + new_t = malloc(sizeof(struct cds_lfht) + + (new_order * sizeof(struct _cds_lfht_node *))); assert(new_size > old_size); memcpy(&new_t->tbl, &old_t->tbl, - old_order * sizeof(struct _rcu_ht_node *)); + old_order * sizeof(struct _cds_lfht_node *)); init_table(ht, new_t, old_order, new_order - old_order); /* Changing table and size atomically wrt lookups */ rcu_assign_pointer(ht->t, new_t); - ht->ht_call_rcu(&old_t->head, ht_free_table_cb); + ht->cds_lfht_call_rcu(&old_t->head, cds_lfht_free_table_cb); } static @@ -834,7 +836,7 @@ unsigned long resize_target_update(struct rcu_table *t, t->size << growth_order); } -void ht_resize(struct rcu_ht *ht, int growth) +void cds_lfht_resize(struct cds_lfht *ht, int growth) { struct rcu_table *t = rcu_dereference(ht->t); unsigned long target_size; @@ -851,7 +853,7 @@ void ht_resize(struct rcu_ht *ht, int growth) if (t->size < target_size) { CMM_STORE_SHARED(t->resize_initiated, 1); pthread_mutex_lock(&ht->resize_mutex); - _do_ht_resize(ht); + _do_cds_lfht_resize(ht); pthread_mutex_unlock(&ht->resize_mutex); } } @@ -861,10 +863,10 @@ void do_resize_cb(struct rcu_head *head) { struct rcu_resize_work *work = caa_container_of(head, struct rcu_resize_work, head); - struct rcu_ht *ht = work->ht; + struct cds_lfht *ht = work->ht; pthread_mutex_lock(&ht->resize_mutex); - _do_ht_resize(ht); + _do_cds_lfht_resize(ht); pthread_mutex_unlock(&ht->resize_mutex); free(work); cmm_smp_mb(); /* finish resize before decrement */ @@ -872,7 +874,7 @@ void do_resize_cb(struct rcu_head *head) } static -void ht_resize_lazy(struct rcu_ht *ht, struct rcu_table *t, int growth) +void cds_lfht_resize_lazy(struct cds_lfht *ht, struct rcu_table *t, int growth) { struct rcu_resize_work *work; unsigned long target_size; @@ -883,7 +885,7 @@ void ht_resize_lazy(struct rcu_ht *ht, struct rcu_table *t, int growth) cmm_smp_mb(); /* increment resize count before calling it */ work = malloc(sizeof(*work)); work->ht = ht; - ht->ht_call_rcu(&work->head, do_resize_cb); + ht->cds_lfht_call_rcu(&work->head, do_resize_cb); CMM_STORE_SHARED(t->resize_initiated, 1); } } diff --git a/tests/test_urcu_hash.c b/tests/test_urcu_hash.c index 280000c..c3ea83f 100644 --- a/tests/test_urcu_hash.c +++ b/tests/test_urcu_hash.c @@ -84,7 +84,7 @@ static unsigned long __thread nr_delnoent; static unsigned long __thread lookup_fail; static unsigned long __thread lookup_ok; -static struct rcu_ht *test_ht; +static struct cds_lfht *test_ht; struct test_data { int a; @@ -338,7 +338,7 @@ unsigned long test_compare(void *key1, size_t key1_len, void *thr_reader(void *_count) { unsigned long long *count = _count; - struct rcu_ht_node *node; + struct cds_lfht_node *node; printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", "reader", pthread_self(), (unsigned long)gettid()); @@ -354,7 +354,7 @@ void *thr_reader(void *_count) for (;;) { rcu_read_lock(); - node = ht_lookup(test_ht, + node = cds_lfht_lookup(test_ht, (void *)(unsigned long)(rand_r(&rand_lookup) % rand_pool), sizeof(void *)); if (node == NULL) @@ -384,14 +384,14 @@ void *thr_reader(void *_count) static void free_node_cb(struct rcu_head *head) { - struct rcu_ht_node *node = - caa_container_of(head, struct rcu_ht_node, head); + struct cds_lfht_node *node = + caa_container_of(head, struct cds_lfht_node, head); free(node); } void *thr_writer(void *_count) { - struct rcu_ht_node *node, *ret_node; + struct cds_lfht_node *node, *ret_node; struct wr_count *count = _count; int ret; @@ -409,15 +409,15 @@ void *thr_writer(void *_count) for (;;) { if (add_only || rand_r(&rand_lookup) & 1) { - node = malloc(sizeof(struct rcu_ht_node)); + node = malloc(sizeof(struct cds_lfht_node)); rcu_read_lock(); - ht_node_init(node, + cds_lfht_node_init(node, (void *)(unsigned long)(rand_r(&rand_lookup) % rand_pool), sizeof(void *)); if (add_unique) - ret_node = ht_add_unique(test_ht, node); + ret_node = cds_lfht_add_unique(test_ht, node); else - ht_add(test_ht, node); + cds_lfht_add(test_ht, node); rcu_read_unlock(); if (add_unique && ret_node != node) { free(node); @@ -427,11 +427,11 @@ void *thr_writer(void *_count) } else { /* May delete */ rcu_read_lock(); - node = ht_lookup(test_ht, + node = cds_lfht_lookup(test_ht, (void *)(unsigned long)(rand_r(&rand_lookup) % rand_pool), sizeof(void *)); if (node) - ret = ht_remove(test_ht, node); + ret = cds_lfht_remove(test_ht, node); else ret = -ENOENT; rcu_read_unlock(); @@ -610,7 +610,7 @@ int main(int argc, char **argv) tid_writer = malloc(sizeof(*tid_writer) * nr_writers); count_reader = malloc(sizeof(*count_reader) * nr_readers); count_writer = malloc(sizeof(*count_writer) * nr_writers); - test_ht = ht_new(test_hash, test_compare, 0x42UL, + test_ht = cds_lfht_new(test_hash, test_compare, 0x42UL, init_hash_size, call_rcu); err = create_all_cpu_call_rcu_data(0); @@ -655,12 +655,12 @@ int main(int argc, char **argv) } printf("Counting nodes... "); fflush(stdout); - ht_count_nodes(test_ht, &count, &removed); + cds_lfht_count_nodes(test_ht, &count, &removed); printf("done.\n"); if (count || removed) printf("WARNING: nodes left in the hash table upon destroy: " "%lu nodes + %lu logically removed.\n", count, removed); - ret = ht_destroy(test_ht); + ret = cds_lfht_destroy(test_ht); if (ret) printf_verbose("final delete aborted\n"); diff --git a/urcu/rculfhash.h b/urcu/rculfhash.h index 8ee9bdd..46c0bea 100644 --- a/urcu/rculfhash.h +++ b/urcu/rculfhash.h @@ -31,124 +31,124 @@ extern "C" { #endif /* - * struct rcu_ht_node and struct _rcu_ht_node should be aligned on + * struct cds_lfht_node and struct _cds_lfht_node should be aligned on * 4-bytes boundaries because the two lower bits are used as flags. */ -struct _rcu_ht_node { - struct rcu_ht_node *next; /* ptr | DUMMY_FLAG | REMOVED_FLAG */ +struct _cds_lfht_node { + struct cds_lfht_node *next; /* ptr | DUMMY_FLAG | REMOVED_FLAG */ unsigned long reverse_hash; }; -struct rcu_ht_node { +struct cds_lfht_node { /* cache-hot for iteration */ - struct _rcu_ht_node p; /* needs to be first field */ + struct _cds_lfht_node p; /* needs to be first field */ void *key; unsigned int key_len; /* cache-cold for iteration */ struct rcu_head head; }; -struct rcu_ht; +struct cds_lfht; /* * Caution ! * Ensure reader and writer threads are registered as urcu readers. */ -typedef unsigned long (*ht_hash_fct)(void *key, size_t length, - unsigned long seed); -typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len, - void *key2, size_t key2_len); +typedef unsigned long (*cds_lfht_hash_fct)(void *key, size_t length, + unsigned long seed); +typedef unsigned long (*cds_lfht_compare_fct)(void *key1, size_t key1_len, + void *key2, size_t key2_len); /* - * ht_node_init - initialize a hash table node + * cds_lfht_node_init - initialize a hash table node */ static inline -void ht_node_init(struct rcu_ht_node *node, void *key, - size_t key_len) +void cds_lfht_node_init(struct cds_lfht_node *node, void *key, + size_t key_len) { node->key = key; node->key_len = key_len; } /* - * ht_new - allocate a hash table. + * cds_lfht_new - allocate a hash table. * * init_size must be power of two. */ -struct rcu_ht *ht_new(ht_hash_fct hash_fct, - ht_compare_fct compare_fct, - unsigned long hash_seed, - unsigned long init_size, - void (*ht_call_rcu)(struct rcu_head *head, +struct cds_lfht *cds_lfht_new(cds_lfht_hash_fct hash_fct, + cds_lfht_compare_fct compare_fct, + unsigned long hash_seed, + unsigned long init_size, + void (*cds_lfht_call_rcu)(struct rcu_head *head, void (*func)(struct rcu_head *head))); /* - * ht_destroy - destroy a hash table. + * cds_lfht_destroy - destroy a hash table. */ -int ht_destroy(struct rcu_ht *ht); +int cds_lfht_destroy(struct cds_lfht *ht); /* - * ht_count_nodes - count the number of nodes in the hash table. + * cds_lfht_count_nodes - count the number of nodes in the hash table. * * Call with rcu_read_lock held. */ -void ht_count_nodes(struct rcu_ht *ht, - unsigned long *count, - unsigned long *removed); +void cds_lfht_count_nodes(struct cds_lfht *ht, + unsigned long *count, + unsigned long *removed); /* - * ht_lookup - lookup a node by key. + * cds_lfht_lookup - lookup a node by key. * * Returns NULL if not found. * Call with rcu_read_lock held. */ -struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len); +struct cds_lfht_node *cds_lfht_lookup(struct cds_lfht *ht, void *key, size_t key_len); /* - * ht_next - get the next item with same key (after a lookup). + * cds_lfht_next - get the next item with same key (after a lookup). * * Returns NULL if no following node exists with same key. - * RCU read-side lock must be held across ht_lookup and ht_next calls, and also - * between ht_next calls using the node returned by a previous ht_next. + * RCU read-side lock must be held across cds_lfht_lookup and cds_lfht_next calls, and also + * between cds_lfht_next calls using the node returned by a previous cds_lfht_next. * Call with rcu_read_lock held. */ -struct rcu_ht_node *ht_next(struct rcu_ht *ht, struct rcu_ht_node *node); +struct cds_lfht_node *cds_lfht_next(struct cds_lfht *ht, struct cds_lfht_node *node); /* - * ht_add - add a node to the hash table. + * cds_lfht_add - add a node to the hash table. * * Call with rcu_read_lock held. */ -void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node); +void cds_lfht_add(struct cds_lfht *ht, struct cds_lfht_node *node); /* - * ht_add_unique - add a node to hash table, if key is not present. + * cds_lfht_add_unique - add a node to hash table, if key is not present. * * Returns the node added upon success. - * Returns the unique node already present upon failure. If ht_add_unique fails, + * Returns the unique node already present upon failure. If cds_lfht_add_unique fails, * the node passed as parameter should be freed by the caller. * Call with rcu_read_lock held. */ -struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node); +struct cds_lfht_node *cds_lfht_add_unique(struct cds_lfht *ht, struct cds_lfht_node *node); /* - * ht_remove - remove node from hash table. + * cds_lfht_remove - remove node from hash table. * - * Node can be looked up with ht_lookup. RCU read-side lock must be held between + * Node can be looked up with cds_lfht_lookup. RCU read-side lock must be held between * lookup and removal. * Call with rcu_read_lock held. */ -int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node); +int cds_lfht_remove(struct cds_lfht *ht, struct cds_lfht_node *node); /* - * ht_resize - Force a hash table resize + * cds_lfht_resize - Force a hash table resize * @growth: growth order (current size is multiplied by 2^growth) * * Currently, only expand operation is supported (growth >= 0). */ -void ht_resize(struct rcu_ht *ht, int growth); +void cds_lfht_resize(struct cds_lfht *ht, int growth); #ifdef __cplusplus }