4ddcdc031b
- Based on C++11's `mutex` - No more need to allocate-deallocate or check for null - No pointer anymore, just a member variable - Platform-specific implementations no longer needed - Simpler for `NO_THREADS` - `BinaryMutex` added for special cases as the non-recursive version - `MutexLock` now takes a reference. At this point the cases of null `Mutex`es are rare. If you ever need that, just don't use `MutexLock`. - `ScopedMutexLock` is dropped and replaced by `MutexLock`, because they were pretty much the same.
420 lines
8.6 KiB
C++
420 lines
8.6 KiB
C++
/*************************************************************************/
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/* string_name.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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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 "string_name.h"
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#include "core/os/os.h"
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#include "core/print_string.h"
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StaticCString StaticCString::create(const char *p_ptr) {
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StaticCString scs;
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scs.ptr = p_ptr;
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return scs;
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}
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StringName::_Data *StringName::_table[STRING_TABLE_LEN];
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StringName _scs_create(const char *p_chr) {
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return (p_chr[0] ? StringName(StaticCString::create(p_chr)) : StringName());
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}
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bool StringName::configured = false;
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Mutex StringName::lock;
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void StringName::setup() {
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ERR_FAIL_COND(configured);
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for (int i = 0; i < STRING_TABLE_LEN; i++) {
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_table[i] = NULL;
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}
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configured = true;
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}
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void StringName::cleanup() {
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lock.lock();
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int lost_strings = 0;
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for (int i = 0; i < STRING_TABLE_LEN; i++) {
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while (_table[i]) {
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_Data *d = _table[i];
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lost_strings++;
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if (OS::get_singleton()->is_stdout_verbose()) {
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if (d->cname) {
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print_line("Orphan StringName: " + String(d->cname));
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} else {
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print_line("Orphan StringName: " + String(d->name));
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}
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}
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_table[i] = _table[i]->next;
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memdelete(d);
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}
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}
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if (lost_strings) {
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print_verbose("StringName: " + itos(lost_strings) + " unclaimed string names at exit.");
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}
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lock.unlock();
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}
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void StringName::unref() {
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ERR_FAIL_COND(!configured);
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if (_data && _data->refcount.unref()) {
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lock.lock();
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if (_data->prev) {
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_data->prev->next = _data->next;
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} else {
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if (_table[_data->idx] != _data) {
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ERR_PRINT("BUG!");
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}
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_table[_data->idx] = _data->next;
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}
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if (_data->next) {
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_data->next->prev = _data->prev;
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}
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memdelete(_data);
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lock.unlock();
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}
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_data = NULL;
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}
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bool StringName::operator==(const String &p_name) const {
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if (!_data) {
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return (p_name.length() == 0);
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}
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return (_data->get_name() == p_name);
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}
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bool StringName::operator==(const char *p_name) const {
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if (!_data) {
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return (p_name[0] == 0);
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}
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return (_data->get_name() == p_name);
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}
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bool StringName::operator!=(const String &p_name) const {
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return !(operator==(p_name));
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}
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bool StringName::operator!=(const StringName &p_name) const {
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// the real magic of all this mess happens here.
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// this is why path comparisons are very fast
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return _data != p_name._data;
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}
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void StringName::operator=(const StringName &p_name) {
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if (this == &p_name)
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return;
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unref();
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if (p_name._data && p_name._data->refcount.ref()) {
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_data = p_name._data;
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}
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}
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StringName::StringName(const StringName &p_name) {
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_data = NULL;
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ERR_FAIL_COND(!configured);
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if (p_name._data && p_name._data->refcount.ref()) {
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_data = p_name._data;
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}
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}
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StringName::StringName(const char *p_name) {
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_data = NULL;
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ERR_FAIL_COND(!configured);
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if (!p_name || p_name[0] == 0)
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return; //empty, ignore
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lock.lock();
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uint32_t hash = String::hash(p_name);
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uint32_t idx = hash & STRING_TABLE_MASK;
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_data = _table[idx];
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while (_data) {
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// compare hash first
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if (_data->hash == hash && _data->get_name() == p_name)
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break;
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_data = _data->next;
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}
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if (_data) {
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if (_data->refcount.ref()) {
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// exists
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lock.unlock();
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return;
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}
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}
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_data = memnew(_Data);
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_data->name = p_name;
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_data->refcount.init();
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_data->hash = hash;
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_data->idx = idx;
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_data->cname = NULL;
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_data->next = _table[idx];
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_data->prev = NULL;
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if (_table[idx])
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_table[idx]->prev = _data;
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_table[idx] = _data;
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lock.unlock();
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}
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StringName::StringName(const StaticCString &p_static_string) {
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_data = NULL;
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ERR_FAIL_COND(!configured);
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ERR_FAIL_COND(!p_static_string.ptr || !p_static_string.ptr[0]);
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lock.lock();
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uint32_t hash = String::hash(p_static_string.ptr);
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uint32_t idx = hash & STRING_TABLE_MASK;
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_data = _table[idx];
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while (_data) {
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// compare hash first
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if (_data->hash == hash && _data->get_name() == p_static_string.ptr)
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break;
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_data = _data->next;
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}
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if (_data) {
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if (_data->refcount.ref()) {
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// exists
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lock.unlock();
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return;
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}
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}
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_data = memnew(_Data);
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_data->refcount.init();
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_data->hash = hash;
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_data->idx = idx;
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_data->cname = p_static_string.ptr;
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_data->next = _table[idx];
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_data->prev = NULL;
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if (_table[idx])
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_table[idx]->prev = _data;
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_table[idx] = _data;
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lock.unlock();
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}
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StringName::StringName(const String &p_name) {
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_data = NULL;
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ERR_FAIL_COND(!configured);
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if (p_name == String())
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return;
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lock.lock();
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uint32_t hash = p_name.hash();
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uint32_t idx = hash & STRING_TABLE_MASK;
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_data = _table[idx];
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while (_data) {
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if (_data->hash == hash && _data->get_name() == p_name)
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break;
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_data = _data->next;
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}
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if (_data) {
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if (_data->refcount.ref()) {
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// exists
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lock.unlock();
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return;
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}
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}
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_data = memnew(_Data);
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_data->name = p_name;
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_data->refcount.init();
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_data->hash = hash;
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_data->idx = idx;
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_data->cname = NULL;
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_data->next = _table[idx];
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_data->prev = NULL;
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if (_table[idx])
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_table[idx]->prev = _data;
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_table[idx] = _data;
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lock.unlock();
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}
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StringName StringName::search(const char *p_name) {
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ERR_FAIL_COND_V(!configured, StringName());
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ERR_FAIL_COND_V(!p_name, StringName());
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if (!p_name[0])
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return StringName();
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lock.lock();
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uint32_t hash = String::hash(p_name);
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uint32_t idx = hash & STRING_TABLE_MASK;
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_Data *_data = _table[idx];
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while (_data) {
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// compare hash first
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if (_data->hash == hash && _data->get_name() == p_name)
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break;
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_data = _data->next;
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}
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if (_data && _data->refcount.ref()) {
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lock.unlock();
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return StringName(_data);
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}
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lock.unlock();
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return StringName(); //does not exist
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}
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StringName StringName::search(const CharType *p_name) {
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ERR_FAIL_COND_V(!configured, StringName());
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ERR_FAIL_COND_V(!p_name, StringName());
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if (!p_name[0])
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return StringName();
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lock.lock();
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uint32_t hash = String::hash(p_name);
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uint32_t idx = hash & STRING_TABLE_MASK;
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_Data *_data = _table[idx];
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while (_data) {
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// compare hash first
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if (_data->hash == hash && _data->get_name() == p_name)
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break;
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_data = _data->next;
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}
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if (_data && _data->refcount.ref()) {
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lock.unlock();
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return StringName(_data);
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}
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lock.unlock();
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return StringName(); //does not exist
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}
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StringName StringName::search(const String &p_name) {
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ERR_FAIL_COND_V(p_name == "", StringName());
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lock.lock();
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uint32_t hash = p_name.hash();
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uint32_t idx = hash & STRING_TABLE_MASK;
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_Data *_data = _table[idx];
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while (_data) {
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// compare hash first
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if (_data->hash == hash && p_name == _data->get_name())
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break;
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_data = _data->next;
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}
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if (_data && _data->refcount.ref()) {
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lock.unlock();
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return StringName(_data);
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}
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lock.unlock();
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return StringName(); //does not exist
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}
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StringName::StringName() {
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_data = NULL;
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}
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StringName::~StringName() {
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unref();
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}
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