Mergul
d0fcdba6cd
-added export attributes (required by windows to make DLL library, not work at now due to DMD bugs) -interface D files to import
287 lines
11 KiB
D
287 lines
11 KiB
D
// D import file generated from 'source\ecs\manager.d'
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module ecs.manager;
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import std.algorithm : max;
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import std.conv : to;
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import std.experimental.allocator;
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import std.experimental.allocator.mallocator : AlignedMallocator, Mallocator;
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import std.traits;
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import core.stdc.stdlib;
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import core.stdc.string;
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import ecs.entity;
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import ecs.entity_allocator;
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import ecs.hash_map;
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import ecs.id_manager;
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import ecs.system;
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import ecs.vector;
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alias gEM = EntityManager.instance;
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alias SerializeVector = ecs.vector.Vector!ubyte;
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class EntityManager
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{
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export static void initialize();
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export static void destroy();
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export void registerSystem(Sys)(int priority)
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{
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alias types = Parameters!(Sys.update);
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alias storages = ParameterStorageClassTuple!(Sys.update);
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alias STC = ParameterStorageClass;
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System system;
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static string genCall()()
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{
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string ret = "s.update(*cast(Entity*)data_pointer,";
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uint i = 0;
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uint req = 0;
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uint opt = 0;
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static foreach (param; Parameters!(Sys.update)[1..$])
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{
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i++;
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if (isPointer!param)
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{
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ret ~= "cast(types[" ~ i.to!string ~ "])(optional_pointers[" ~ opt++.to!string ~ "]),";
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}
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else
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{
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ret ~= "*cast(types[" ~ i.to!string ~ "]*)(pointers[" ~ req++.to!string ~ "]),";
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}
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}
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ret ~= ");";
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return ret;
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}
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static string genCompList()()
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{
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string ret = "ushort comp;uint req;uint opt;";
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foreach (i; 1 .. (Parameters!(Sys.update)).length)
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{
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ret ~= "\x0a static if(isPointer!(types[" ~ i.to!string ~ "]))opt++;\x0a else static if(storages[" ~ i.to!string ~ "] == STC.ref_)req++;\x0a\x0a else static assert(0,\"Can't register system \\\"" ~ Sys.stringof ~ "\\\". Unsupported parameter type \\\"\"~types[" ~ i.to!string ~ "].stringof~\"\\\".\");";
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}
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ret ~= "system.m_components = Mallocator.instance.makeArray!ushort(req);";
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ret ~= "system.m_optional_components = Mallocator.instance.makeArray!ushort(opt);";
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ret ~= "opt = 0;req = 0;";
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foreach (i; 1 .. (Parameters!(Sys.update)).length)
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{
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ret ~= "\x0a static if(isPointer!(types[" ~ i.to!string ~ "]))\x0a {\x0a comp = components_map.get(PointerTarget!(types[" ~ i.to!string ~ "]).stringof, ushort.max);\x0a\x0a if(comp == ushort.max)assert(0,\"Can't register system \\\"" ~ Sys.stringof ~ "\\\" due to non existing component \\\"\"~types[" ~ i.to!string ~ "].stringof~\"\\\".\");\x0a system.m_optional_components[opt++] = comp;\x0a }\x0a else static if(storages[" ~ i.to!string ~ "] == STC.ref_)\x0a {\x0a comp = components_map.get(types[" ~ i.to!string ~ "].stringof, ushort.max);\x0a\x0a if(comp == ushort.max)assert(0,\"Can't register system \\\"" ~ Sys.stringof ~ "\\\" due to non existing component \\\"\"~types[" ~ i.to!string ~ "].stringof~\"\\\".\");\x0a system.m_components[req++] = comp;\x0a }";
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}
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return ret;
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}
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static string catchFunc()(string member, string func)
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{
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string ret = "static if (hasMember!(Sys, \"" ~ func ~ "\"))\x0a {\x0a static void call" ~ func ~ "(void* system_pointer)\x0a {\x0a\x0a Sys* s = cast(Sys*) system_pointer;\x0a s." ~ func ~ "();\x0a }\x0a\x0a system." ~ member ~ " = &call" ~ func ~ ";\x0a }";
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return ret;
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}
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static if (hasMember!(Sys, "update"))
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{
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static void callUpdate(ref CallData data, void* entity)
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{
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static if (hasMember!(Sys, "update"))
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{
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Sys* s = cast(Sys*) data.system.m_system_pointer;
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void*[] pointers = (cast(void**) alloca(data.system.m_components.length * (void*)
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.sizeof))[0 .. data.system.m_components.length];
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void*[] optional_pointers = (cast(void**) alloca(
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data.system.m_optional_components.length * (void*).sizeof))[0
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.. data.system.m_optional_components.length];
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EntitiesBlock* block = data.info.first_block;
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while (block !is null)
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{
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uint size = block.type_data.size;
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void* data_pointer = block.dataBegin();
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foreach (i, ref pointer; pointers)
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{
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pointer = data_pointer + data.deltas[i];
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}
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foreach (i, ref pointer; optional_pointers)
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{
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uint ind = cast(uint)(i + pointers.length);
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if (data.deltas[ind] != uint.max)
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pointer = data_pointer + data.deltas[ind];
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else
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pointer = null;
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}
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foreach (i; 0 .. block.entities_count)
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{
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mixin(genCall());
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data_pointer += size; //data.info.size;
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foreach (ref pointer; pointers)
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pointer += size;
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foreach (ref pointer; optional_pointers)
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if (pointer != null)
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pointer += size;
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}
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block = block.next_block;
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}
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}
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}
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system.m_update = &callUpdate;
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}
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mixin(catchFunc("m_enable", "onEnable"));
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mixin(catchFunc("m_disable", "onDisable"));
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mixin(catchFunc("m_create", "onCreate"));
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mixin(catchFunc("m_destroy", "onDestroy"));
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mixin(catchFunc("m_begin", "onBegin"));
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mixin(catchFunc("m_end", "onEnd"));
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system.m_system_pointer = cast(void*)Mallocator.instance.make!Sys;
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system.m_priority = priority;
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mixin(genCompList());
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ushort sys_id = systems_map.get(Sys.stringof, (ushort).max);
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if (sys_id < systems.length)
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{
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system.enable();
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systems[sys_id] = system;
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}
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else
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{
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systems_map.add(Sys.stringof, cast(ushort)systems.length);
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systems.add(system);
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if (system.m_create)
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system.m_create(system.m_system_pointer);
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systems[$ - 1].enable();
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foreach (info; &entities_infos.byValue)
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{
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addEntityCaller(*info, cast(uint)systems.length - 1);
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}
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}
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updateEntityCallers();
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}
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void registerComponent(Comp)()
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{
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ComponentInfo info;
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static if (!hasMember!(Comp, "component_id") || !is(typeof(Comp.component_id) == ushort))
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{
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static assert(0, "Component should have \"__gshared ushort component_id");
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}
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static if (hasMember!(Comp, "onDestroy") && isFunction!(Comp.onDestroy) && is(ReturnType!(Comp.onDestroy) == void) && (Parameters!(Comp.onDestroy).length == 0))
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{
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static void callDestroy(void* pointer)
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{
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(cast(Comp*) pointer).onDestroy();
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}
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info.destroy_callback = &callDestroy;
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}
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info.size = Comp.sizeof;
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info.aligment = Comp.alignof;
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info.init_data = Mallocator.instance.makeArray!ubyte(Comp.sizeof);
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*cast(Comp*)info.init_data.ptr = Comp.init;
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ushort comp_id = components_map.get(Comp.stringof, (ushort).max);
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if (comp_id < components.length)
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{
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Comp.component_id = comp_id;
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}
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else
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{
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components.add(info);
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Comp.component_id = cast(ushort)(components.length - 1);
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components_map.add(Comp.stringof, cast(ushort)(components.length - 1));
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}
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}
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export void update();
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static void alignNum(ref ushort num, ushort aligment);
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extern (C) static int compareUShorts(const void* a, const void* b);
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export EntityTemplate* allocateTemplate(ushort[] components_ids);
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export EntityInfo* getEntityInfo(ushort[] ids);
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export void updateEntityCallers();
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export void addEntityCaller(ref EntityInfo entity, uint system_id);
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export Entity* getEntity(EntityID id);
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export void removeComponents(EntityID entity_id, ushort[] del_ids);
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private void __removeComponents(EntityID entity_id, ushort[] del_ids);
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void removeComponents(Components...)(EntityID entity_id)
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{
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const uint num = Components.length;
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ushort[num] del_ids;
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static foreach (i, comp; Components)
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{
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del_ids[i] = comp.component_id;
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}
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removeComponents(entity_id, del_ids);
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}
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private void __addComponents(EntityID entity_id, ushort[] new_ids, void*[] data_pointers);
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void addComponents(Components...)(EntityID entity_id, Components comps)
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{
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const uint num = Components.length;
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Entity* entity = id_manager.getEntityPointer(entity_id);
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EntitiesBlock* block = getMetaData(entity);
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EntityInfo* info = block.type_data;
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ushort[] ids = (cast(ushort*)alloca((ushort).sizeof * (info.components.length + num)))[0..info.components.length + num];
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ushort[num] new_ids;
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static foreach (i, comp; Components)
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{
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new_ids[i] = comp.component_id;
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}
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change_entities_list.add(1);
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change_entities_list.add((cast(ubyte*)&entity_id)[0..8]);
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change_entities_list.add((cast(ubyte*)&num)[0..4]);
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change_entities_list.add(cast(ubyte[])new_ids);
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static foreach (i, comp; comps)
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{
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change_entities_list.add((cast(ubyte*)&comp)[0..comp.sizeof]);
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}
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}
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export void freeTemplate(EntityTemplate* template_);
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export ref Entity addEntity(EntityTemplate* tmpl);
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private EntitiesBlock* findBlockWithFreeSpace(EntityInfo* info);
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export void removeEntity(EntityID id);
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private void __removeEntity(EntityID id);
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private void removeEntityNoID(Entity* entity, EntitiesBlock* block, bool call_destructors = false);
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export EntitiesBlock* getMetaData(void* pointer);
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private void changeEntites();
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private void updateBlocks();
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private void removeEntities();
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export void begin();
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export void end();
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struct ComponentInfo
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{
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ushort size;
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ushort aligment;
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ubyte[] init_data;
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void function(void* pointer) destroy_callback;
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}
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struct EntityInfo
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{
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ushort[] components;
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ushort[] deltas;
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ushort alignment;
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ushort size;
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EntitiesBlock* first_block;
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EntitiesBlock* first_with_free_space;
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Vector!CallData callers;
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}
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struct EntitiesBlock
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{
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uint dataDelta();
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void* dataBegin();
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EntityInfo* type_data;
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ushort entities_count;
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ushort added_count;
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uint id;
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EntitiesBlock* next_block;
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}
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struct CallData
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{
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uint system_id;
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System* system;
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EntityManager.EntityInfo* info;
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ushort[] deltas;
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}
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alias SytemFuncType = void function(ref EntityManager.CallData data, void* entity);
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enum page_size = 4096;
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enum pages_in_block = 128;
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IDManager id_manager;
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EntityAllocator allocator;
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Vector!EntityID entities_to_remove;
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Vector!(EntitiesBlock*) blocks_to_update;
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Vector!ubyte change_entities_list;
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HashMap!(ushort[], EntityInfo*) entities_infos;
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HashMap!(string, ushort) systems_map;
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HashMap!(string, ushort) components_map;
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Vector!System systems;
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Vector!ComponentInfo components;
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__gshared EntityManager instance;
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}
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version (Windows)
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{
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extern (Windows) bool DllMain(void* hInstance, uint ulReason, void*);
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}
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