From 7fbaedb117ecbda4c7eba07818637f780daf5428 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Fri, 25 Apr 2014 02:16:48 +0200 Subject: Replace a few more O(n) peer operations with O(log n) using binary search --- src/peer.c | 130 +++++++++++++++++++++++++++++++++---------------------------- 1 file changed, 70 insertions(+), 60 deletions(-) (limited to 'src') diff --git a/src/peer.c b/src/peer.c index 846d274..d77b973 100644 --- a/src/peer.c +++ b/src/peer.c @@ -40,30 +40,71 @@ static inline void on_disestablish(const fastd_peer_t *peer) { fastd_shell_command_exec(&conf.on_disestablish, peer, &peer->local_address, &peer->address); } -static inline void free_socket(fastd_peer_t *peer) { - if (peer->sock) { - if (fastd_peer_is_socket_dynamic(peer)) { - if (peer->sock->peer != peer) - exit_bug("dynamic peer socket mismatch"); - - fastd_socket_close(peer->sock); - free(peer->sock); - peer->sock = NULL; - - size_t i; - for (i = 0; i < VECTOR_LEN(ctx.peers); i++) { - if (VECTOR_INDEX(ctx.peers, i) == peer) { - fastd_poll_set_fd_peer(i); - break; - } - } - } - else { - peer->sock = NULL; - } +static int peer_id_cmp(fastd_peer_t *const *a, fastd_peer_t *const *b) { + if ((*a)->id == (*b)->id) + return 0; + else if ((*a)->id < (*b)->id) + return -1; + else + return 1; +} + +static fastd_peer_t** peer_p_find_by_id(uint64_t id) { + fastd_peer_t key = {.id = id}; + fastd_peer_t *const keyp = &key; + + return VECTOR_BSEARCH(&keyp, ctx.peers, peer_id_cmp); +} + +static size_t peer_index_find_by_id(uint64_t id) { + fastd_peer_t **ret = peer_p_find_by_id(id); + + if (!ret) + exit_bug("peer_index_find_by_id: not found"); + + return ret - VECTOR_DATA(ctx.peers); + +} + +static inline size_t peer_index(fastd_peer_t *peer) { + return peer_index_find_by_id(peer->id); +} + +fastd_peer_t* fastd_peer_find_by_id(uint64_t id) { + fastd_peer_t **ret = peer_p_find_by_id(id); + + if (ret) + return *ret; + else + return NULL; + +} + +static void free_socket_by_id(size_t i) { + fastd_peer_t *peer = VECTOR_INDEX(ctx.peers, i); + + if (!peer->sock) + return; + + if (fastd_peer_is_socket_dynamic(peer)) { + if (peer->sock->peer != peer) + exit_bug("dynamic peer socket mismatch"); + + fastd_socket_close(peer->sock); + free(peer->sock); + + peer->sock = NULL; + fastd_poll_set_fd_peer(i); + } + else { + peer->sock = NULL; } } +static inline void free_socket(fastd_peer_t *peer) { + free_socket_by_id(peer_index(peer)); +} + static inline bool has_group_config_constraints(const fastd_peer_group_config_t *group) { for (; group; group = group->parent) { if (group->max_connections >= 0) @@ -74,8 +115,10 @@ static inline bool has_group_config_constraints(const fastd_peer_group_config_t } void fastd_peer_reset_socket(fastd_peer_t *peer) { + size_t i = peer_index(peer); + if (peer->address.sa.sa_family == AF_UNSPEC) { - free_socket(peer); + free_socket_by_id(i); return; } @@ -84,7 +127,7 @@ void fastd_peer_reset_socket(fastd_peer_t *peer) { pr_debug("resetting socket for peer %P", peer); - free_socket(peer); + free_socket_by_id(i); switch (peer->address.sa.sa_family) { case AF_INET: @@ -104,13 +147,7 @@ void fastd_peer_reset_socket(fastd_peer_t *peer) { if (!peer->sock || !fastd_peer_is_socket_dynamic(peer)) return; - size_t i; - for (i = 0; i < VECTOR_LEN(ctx.peers); i++) { - if (VECTOR_INDEX(ctx.peers, i) == peer) { - fastd_poll_set_fd_peer(i); - break; - } - } + fastd_poll_set_fd_peer(i); } void fastd_peer_schedule_handshake(fastd_peer_t *peer, int delay) { @@ -137,28 +174,6 @@ void fastd_peer_schedule_handshake(fastd_peer_t *peer, int delay) { fastd_dlist_insert(list, &peer->handshake_entry); } -static int peer_id_cmp(fastd_peer_t *const *a, fastd_peer_t *const *b) { - if ((*a)->id == (*b)->id) - return 0; - else if ((*a)->id < (*b)->id) - return -1; - else - return 1; -} - -fastd_peer_t* fastd_peer_find_by_id(uint64_t id) { - fastd_peer_t key = {.id = id}; - fastd_peer_t *const keyp = &key; - - fastd_peer_t **ret = VECTOR_BSEARCH(&keyp, ctx.peers, peer_id_cmp); - - if (ret) - return *ret; - else - return NULL; - -} - static inline fastd_peer_group_t* find_peer_group(fastd_peer_group_t *group, const fastd_peer_group_config_t *config) { if (group->conf == config) return group; @@ -282,14 +297,9 @@ static void setup_peer(fastd_peer_t *peer) { static void delete_peer(fastd_peer_t *peer) { pr_debug("deleting peer %P", peer); - size_t i; - for (i = 0; i < VECTOR_LEN(ctx.peers); i++) { - if (VECTOR_INDEX(ctx.peers, i) == peer) { - VECTOR_DELETE(ctx.peers, i); - fastd_poll_delete_peer(i); - break; - } - } + size_t i = peer_index(peer); + VECTOR_DELETE(ctx.peers, i); + fastd_poll_delete_peer(i); fastd_peer_hashtable_remove(peer); -- cgit v1.2.3