d8223ffa75
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
(cherry picked from commit c7bc44d5ad)
304 lines
8.3 KiB
C++
304 lines
8.3 KiB
C++
/*************************************************************************/
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/* ip.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "ip.h"
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#include "os/thread.h"
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#include "os/semaphore.h"
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#include "hash_map.h"
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VARIANT_ENUM_CAST(IP::ResolverStatus);
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/************* RESOLVER ******************/
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struct _IP_ResolverPrivate {
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struct QueueItem {
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volatile IP::ResolverStatus status;
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IP_Address response;
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String hostname;
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IP::Type type;
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void clear() {
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status = IP::RESOLVER_STATUS_NONE;
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response = IP_Address();
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type = IP::TYPE_NONE;
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hostname="";
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};
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QueueItem() {
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clear();
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};
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};
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QueueItem queue[IP::RESOLVER_MAX_QUERIES];
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IP::ResolverID find_empty_id() const {
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for(int i=0;i<IP::RESOLVER_MAX_QUERIES;i++) {
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if (queue[i].status==IP::RESOLVER_STATUS_NONE)
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return i;
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}
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return IP::RESOLVER_INVALID_ID;
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}
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Semaphore *sem;
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Thread* thread;
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//Semaphore* semaphore;
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bool thread_abort;
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void resolve_queues() {
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for(int i=0;i<IP::RESOLVER_MAX_QUERIES;i++) {
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if (queue[i].status!=IP::RESOLVER_STATUS_WAITING)
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continue;
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queue[i].response=IP::get_singleton()->resolve_hostname(queue[i].hostname, queue[i].type);
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if (queue[i].response==IP_Address())
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queue[i].status=IP::RESOLVER_STATUS_ERROR;
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else
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queue[i].status=IP::RESOLVER_STATUS_DONE;
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}
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}
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static void _thread_function(void *self) {
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_IP_ResolverPrivate *ipr=(_IP_ResolverPrivate*)self;
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while(!ipr->thread_abort) {
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ipr->sem->wait();
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GLOBAL_LOCK_FUNCTION;
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ipr->resolve_queues();
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}
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}
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HashMap<String, IP_Address> cache;
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static String get_cache_key(String p_hostname, IP::Type p_type) {
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return itos(p_type) + p_hostname;
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}
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};
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IP_Address IP::resolve_hostname(const String& p_hostname, IP::Type p_type) {
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GLOBAL_LOCK_FUNCTION;
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String key = _IP_ResolverPrivate::get_cache_key(p_hostname, p_type);
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if (resolver->cache.has(key))
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return resolver->cache[key];
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IP_Address res = _resolve_hostname(p_hostname, p_type);
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resolver->cache[key]=res;
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return res;
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}
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IP::ResolverID IP::resolve_hostname_queue_item(const String& p_hostname, IP::Type p_type) {
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GLOBAL_LOCK_FUNCTION;
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ResolverID id = resolver->find_empty_id();
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if (id==RESOLVER_INVALID_ID) {
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WARN_PRINT("Out of resolver queries");
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return id;
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}
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String key = _IP_ResolverPrivate::get_cache_key(p_hostname, p_type);
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resolver->queue[id].hostname=p_hostname;
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resolver->queue[id].type = p_type;
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if (resolver->cache.has(key)) {
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resolver->queue[id].response=resolver->cache[key];
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resolver->queue[id].status=IP::RESOLVER_STATUS_DONE;
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} else {
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resolver->queue[id].response=IP_Address();
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resolver->queue[id].status=IP::RESOLVER_STATUS_WAITING;
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if (resolver->thread)
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resolver->sem->post();
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else
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resolver->resolve_queues();
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}
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return id;
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}
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IP::ResolverStatus IP::get_resolve_item_status(ResolverID p_id) const {
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ERR_FAIL_INDEX_V(p_id,IP::RESOLVER_MAX_QUERIES,IP::RESOLVER_STATUS_NONE);
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GLOBAL_LOCK_FUNCTION;
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ERR_FAIL_COND_V(resolver->queue[p_id].status==IP::RESOLVER_STATUS_NONE,IP::RESOLVER_STATUS_NONE);
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return resolver->queue[p_id].status;
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}
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IP_Address IP::get_resolve_item_address(ResolverID p_id) const {
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ERR_FAIL_INDEX_V(p_id,IP::RESOLVER_MAX_QUERIES,IP_Address());
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GLOBAL_LOCK_FUNCTION;
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if (resolver->queue[p_id].status!=IP::RESOLVER_STATUS_DONE) {
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ERR_EXPLAIN("Resolve of '"+resolver->queue[p_id].hostname+"'' didn't complete yet.");
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ERR_FAIL_COND_V(resolver->queue[p_id].status!=IP::RESOLVER_STATUS_DONE,IP_Address());
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}
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return resolver->queue[p_id].response;
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}
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void IP::erase_resolve_item(ResolverID p_id) {
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ERR_FAIL_INDEX(p_id,IP::RESOLVER_MAX_QUERIES);
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GLOBAL_LOCK_FUNCTION;
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resolver->queue[p_id].status=IP::RESOLVER_STATUS_NONE;
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}
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void IP::clear_cache(const String &p_hostname) {
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if (p_hostname.empty()) {
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resolver->cache.clear();
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} else {
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resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_NONE));
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resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_IPV4));
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resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_IPV6));
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resolver->cache.erase(_IP_ResolverPrivate::get_cache_key(p_hostname, IP::TYPE_ANY));
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}
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};
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Array IP::_get_local_addresses() const {
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Array addresses;
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List<IP_Address> ip_addresses;
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get_local_addresses(&ip_addresses);
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for(List<IP_Address>::Element *E=ip_addresses.front();E;E=E->next()) {
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addresses.push_back(E->get());
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}
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return addresses;
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}
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void IP::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("resolve_hostname","host","ip_type"),&IP::resolve_hostname,DEFVAL(IP::TYPE_ANY));
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ObjectTypeDB::bind_method(_MD("resolve_hostname_queue_item","host","ip_type"),&IP::resolve_hostname_queue_item,DEFVAL(IP::TYPE_ANY));
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ObjectTypeDB::bind_method(_MD("get_resolve_item_status","id"),&IP::get_resolve_item_status);
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ObjectTypeDB::bind_method(_MD("get_resolve_item_address","id"),&IP::get_resolve_item_address);
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ObjectTypeDB::bind_method(_MD("erase_resolve_item","id"),&IP::erase_resolve_item);
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ObjectTypeDB::bind_method(_MD("get_local_addresses"),&IP::_get_local_addresses);
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ObjectTypeDB::bind_method(_MD("clear_cache"),&IP::clear_cache, DEFVAL(""));
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BIND_CONSTANT( RESOLVER_STATUS_NONE );
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BIND_CONSTANT( RESOLVER_STATUS_WAITING );
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BIND_CONSTANT( RESOLVER_STATUS_DONE );
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BIND_CONSTANT( RESOLVER_STATUS_ERROR );
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BIND_CONSTANT( RESOLVER_MAX_QUERIES );
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BIND_CONSTANT( RESOLVER_INVALID_ID );
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BIND_CONSTANT( TYPE_NONE );
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BIND_CONSTANT( TYPE_IPV4 );
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BIND_CONSTANT( TYPE_IPV6 );
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BIND_CONSTANT( TYPE_ANY );
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}
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IP*IP::singleton=NULL;
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IP* IP::get_singleton() {
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return singleton;
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}
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IP* (*IP::_create)()=NULL;
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IP* IP::create() {
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ERR_FAIL_COND_V(singleton,NULL);
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ERR_FAIL_COND_V(!_create,NULL);
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return _create();
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}
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IP::IP() {
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singleton=this;
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resolver = memnew( _IP_ResolverPrivate );
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resolver->sem=NULL;
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#ifndef NO_THREADS
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//resolver->sem = Semaphore::create();
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resolver->sem=NULL;
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if (resolver->sem) {
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resolver->thread_abort=false;
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resolver->thread = Thread::create( _IP_ResolverPrivate::_thread_function,resolver );
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if (!resolver->thread)
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memdelete(resolver->sem); //wtf
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} else {
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resolver->thread=NULL;
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}
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#else
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resolver->sem = NULL;
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resolver->thread=NULL;
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#endif
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}
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IP::~IP() {
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#ifndef NO_THREADS
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if (resolver->thread) {
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resolver->thread_abort=true;
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resolver->sem->post();
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Thread::wait_to_finish(resolver->thread);
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memdelete( resolver->thread );
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memdelete( resolver->sem);
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}
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memdelete(resolver);
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#endif
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}
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