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shader: Add pools and rename files

This commit is contained in:
ReinUsesLisp 2021-02-05 23:11:23 -03:00 committed by ameerj
parent be94ee88d2
commit 16cb00c521
30 changed files with 255 additions and 108 deletions
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14
src/shader_recompiler/CMakeLists.txt
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@ -1,4 +1,5 @@
add_executable(shader_recompiler
backend/spirv/emit_spirv.h
environment.h
exception.h
file_environment.cpp
@ -17,10 +18,12 @@ add_executable(shader_recompiler
frontend/ir/ir_emitter.h
frontend/ir/microinstruction.cpp
frontend/ir/microinstruction.h
frontend/ir/opcode.cpp
frontend/ir/opcode.h
frontend/ir/opcode.inc
frontend/ir/opcodes.cpp
frontend/ir/opcodes.h
frontend/ir/opcodes.inc
frontend/ir/pred.h
frontend/ir/program.cpp
frontend/ir/program.h
frontend/ir/reg.h
frontend/ir/type.cpp
frontend/ir/type.h
@ -33,8 +36,8 @@ add_executable(shader_recompiler
frontend/maxwell/instruction.h
frontend/maxwell/location.h
frontend/maxwell/maxwell.inc
frontend/maxwell/opcode.cpp
frontend/maxwell/opcode.h
frontend/maxwell/opcodes.cpp
frontend/maxwell/opcodes.h
frontend/maxwell/program.cpp
frontend/maxwell/program.h
frontend/maxwell/termination_code.cpp
@ -67,6 +70,7 @@ add_executable(shader_recompiler
ir_opt/ssa_rewrite_pass.cpp
ir_opt/verification_pass.cpp
main.cpp
object_pool.h
)
target_link_libraries(shader_recompiler PRIVATE fmt::fmt)

21
src/shader_recompiler/backend/spirv/emit_spirv.h Normal file
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@ -0,0 +1,21 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/program.h"
namespace Shader::Backend::SPIRV {
class EmitSPIRV {
public:
private:
// Microinstruction emitters
#define OPCODE(name, result_type, ...) void Emit##name(EmitContext& ctx, IR::Inst* inst);
#include "shader_recompiler/frontend/ir/opcodes.inc"
#undef OPCODE
};
} // namespace Shader::Backend::SPIRV

5
src/shader_recompiler/frontend/ir/basic_block.cpp
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@ -14,7 +14,8 @@
namespace Shader::IR {
Block::Block(u32 begin, u32 end) : location_begin{begin}, location_end{end} {}
Block::Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end)
: inst_pool{&inst_pool_}, location_begin{begin}, location_end{end} {}
Block::~Block() = default;
@ -24,7 +25,7 @@ void Block::AppendNewInst(Opcode op, std::initializer_list<Value> args) {
Block::iterator Block::PrependNewInst(iterator insertion_point, Opcode op,
std::initializer_list<Value> args, u64 flags) {
Inst* const inst{std::construct_at(instruction_alloc_pool.allocate(), op, flags)};
Inst* const inst{inst_pool->Create(op, flags)};
const auto result_it{instructions.insert(insertion_point, *inst)};
if (inst->NumArgs() != args.size()) {

11
src/shader_recompiler/frontend/ir/basic_block.h
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@ -10,9 +10,9 @@
#include <vector>
#include <boost/intrusive/list.hpp>
#include <boost/pool/pool_alloc.hpp>
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::IR {
@ -25,7 +25,7 @@ public:
using reverse_iterator = InstructionList::reverse_iterator;
using const_reverse_iterator = InstructionList::const_reverse_iterator;
explicit Block(u32 begin, u32 end);
explicit Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end);
~Block();
Block(const Block&) = delete;
@ -119,6 +119,8 @@ public:
}
private:
/// Memory pool for instruction list
ObjectPool<Inst>* inst_pool;
/// Starting location of this block
u32 location_begin;
/// End location of this block
@ -127,11 +129,6 @@ private:
/// List of instructions in this block
InstructionList instructions;
/// Memory pool for instruction list
boost::fast_pool_allocator<Inst, boost::default_user_allocator_malloc_free,
boost::details::pool::null_mutex>
instruction_alloc_pool;
/// Block immediate predecessors
std::vector<IR::Block*> imm_predecessors;
};

12
src/shader_recompiler/frontend/ir/function.h
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@ -4,22 +4,14 @@
#pragma once
#include <memory>
#include <vector>
#include <boost/container/small_vector.hpp>
#include "shader_recompiler/frontend/ir/basic_block.h"
namespace Shader::IR {
struct Function {
struct InplaceDelete {
void operator()(IR::Block* block) const noexcept {
std::destroy_at(block);
}
};
using UniqueBlock = std::unique_ptr<IR::Block, InplaceDelete>;
std::vector<UniqueBlock> blocks;
boost::container::small_vector<Block*, 16> blocks;
};
} // namespace Shader::IR

2
src/shader_recompiler/frontend/ir/microinstruction.h
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@ -13,7 +13,7 @@
#include <boost/intrusive/list.hpp>
#include "common/common_types.h"
#include "shader_recompiler/frontend/ir/opcode.h"
#include "shader_recompiler/frontend/ir/opcodes.h"
#include "shader_recompiler/frontend/ir/type.h"
#include "shader_recompiler/frontend/ir/value.h"

4
src/shader_recompiler/frontend/ir/opcode.cpp → src/shader_recompiler/frontend/ir/opcodes.cpp
View File

@ -7,7 +7,7 @@
#include <string_view>
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/opcode.h"
#include "shader_recompiler/frontend/ir/opcodes.h"
namespace Shader::IR {
namespace {
@ -26,7 +26,7 @@ constexpr std::array META_TABLE{
.type{type_token}, \
.arg_types{__VA_ARGS__}, \
},
#include "opcode.inc"
#include "opcodes.inc"
#undef OPCODE
};

2
src/shader_recompiler/frontend/ir/opcode.h → src/shader_recompiler/frontend/ir/opcodes.h
View File

@ -14,7 +14,7 @@ namespace Shader::IR {
enum class Opcode {
#define OPCODE(name, ...) name,
#include "opcode.inc"
#include "opcodes.inc"
#undef OPCODE
};

0
src/shader_recompiler/frontend/ir/opcode.inc → src/shader_recompiler/frontend/ir/opcodes.inc
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38
src/shader_recompiler/frontend/ir/program.cpp Normal file
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@ -0,0 +1,38 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <map>
#include <string>
#include <fmt/format.h>
#include "shader_recompiler/frontend/ir/function.h"
#include "shader_recompiler/frontend/ir/program.h"
namespace Shader::IR {
std::string DumpProgram(const Program& program) {
size_t index{0};
std::map<const IR::Inst*, size_t> inst_to_index;
std::map<const IR::Block*, size_t> block_to_index;
for (const IR::Function& function : program.functions) {
for (const IR::Block* const block : function.blocks) {
block_to_index.emplace(block, index);
++index;
}
}
std::string ret;
for (const IR::Function& function : program.functions) {
ret += fmt::format("Function\n");
for (const auto& block : function.blocks) {
ret += IR::DumpBlock(*block, block_to_index, inst_to_index, index) + '\n';
}
}
return ret;
}
} // namespace Shader::IR

21
src/shader_recompiler/frontend/ir/program.h Normal file
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@ -0,0 +1,21 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <string>
#include <boost/container/small_vector.hpp>
#include "shader_recompiler/frontend/ir/function.h"
namespace Shader::IR {
struct Program {
boost::container::small_vector<Function, 1> functions;
};
[[nodiscard]] std::string DumpProgram(const Program& program);
} // namespace Shader::IR

2
src/shader_recompiler/frontend/ir/value.cpp
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@ -3,7 +3,7 @@
// Refer to the license.txt file included.
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/opcode.h"
#include "shader_recompiler/frontend/ir/opcodes.h"
#include "shader_recompiler/frontend/ir/value.h"
namespace Shader::IR {

2
src/shader_recompiler/frontend/maxwell/control_flow.h
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@ -16,7 +16,7 @@
#include "shader_recompiler/frontend/ir/condition.h"
#include "shader_recompiler/frontend/maxwell/instruction.h"
#include "shader_recompiler/frontend/maxwell/location.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
namespace Shader::Maxwell::Flow {

2
src/shader_recompiler/frontend/maxwell/decode.cpp
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@ -11,7 +11,7 @@
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/decode.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
namespace Shader::Maxwell {
namespace {

2
src/shader_recompiler/frontend/maxwell/decode.h
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@ -5,7 +5,7 @@
#pragma once
#include "common/common_types.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/opcode.cpp → src/shader_recompiler/frontend/maxwell/opcodes.cpp
View File

@ -5,7 +5,7 @@
#include <array>
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
namespace Shader::Maxwell {
namespace {

0
src/shader_recompiler/frontend/maxwell/opcode.h → src/shader_recompiler/frontend/maxwell/opcodes.h
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49
src/shader_recompiler/frontend/maxwell/program.cpp
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@ -5,6 +5,7 @@
#include <algorithm>
#include <memory>
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/maxwell/program.h"
#include "shader_recompiler/frontend/maxwell/termination_code.h"
#include "shader_recompiler/frontend/maxwell/translate/translate.h"
@ -12,17 +13,18 @@
namespace Shader::Maxwell {
namespace {
void TranslateCode(Environment& env, const Flow::Function& cfg_function, IR::Function& function,
std::span<IR::Block*> block_map, IR::Block* block_memory) {
void TranslateCode(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::Function& cfg_function, IR::Function& function,
std::span<IR::Block*> block_map) {
const size_t num_blocks{cfg_function.blocks.size()};
function.blocks.reserve(num_blocks);
for (const Flow::BlockId block_id : cfg_function.blocks) {
const Flow::Block& flow_block{cfg_function.blocks_data[block_id]};
function.blocks.emplace_back(std::construct_at(block_memory, Translate(env, flow_block)));
block_map[flow_block.id] = function.blocks.back().get();
++block_memory;
IR::Block* const ir_block{block_pool.Create(Translate(inst_pool, env, flow_block))};
block_map[flow_block.id] = ir_block;
function.blocks.emplace_back(ir_block);
}
}
@ -34,21 +36,24 @@ void EmitTerminationInsts(const Flow::Function& cfg_function,
}
}
void TranslateFunction(Environment& env, const Flow::Function& cfg_function, IR::Function& function,
IR::Block* block_memory) {
void TranslateFunction(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::Function& cfg_function,
IR::Function& function) {
std::vector<IR::Block*> block_map;
block_map.resize(cfg_function.blocks_data.size());
TranslateCode(env, cfg_function, function, block_map, block_memory);
TranslateCode(inst_pool, block_pool, env, cfg_function, function, block_map);
EmitTerminationInsts(cfg_function, block_map);
}
} // Anonymous namespace
Program::Program(Environment& env, const Flow::CFG& cfg) {
IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::CFG& cfg) {
IR::Program program;
auto& functions{program.functions};
functions.reserve(cfg.Functions().size());
for (const Flow::Function& cfg_function : cfg.Functions()) {
TranslateFunction(env, cfg_function, functions.emplace_back(),
block_alloc_pool.allocate(cfg_function.blocks.size()));
TranslateFunction(inst_pool, block_pool, env, cfg_function, functions.emplace_back());
}
std::ranges::for_each(functions, Optimization::SsaRewritePass);
for (IR::Function& function : functions) {
@ -59,27 +64,7 @@ Program::Program(Environment& env, const Flow::CFG& cfg) {
Optimization::VerificationPass(function);
}
//*/
}
std::string DumpProgram(const Program& program) {
size_t index{0};
std::map<const IR::Inst*, size_t> inst_to_index;
std::map<const IR::Block*, size_t> block_to_index;
for (const IR::Function& function : program.functions) {
for (const auto& block : function.blocks) {
block_to_index.emplace(block.get(), index);
++index;
}
}
std::string ret;
for (const IR::Function& function : program.functions) {
ret += fmt::format("Function\n");
for (const auto& block : function.blocks) {
ret += IR::DumpBlock(*block, block_to_index, inst_to_index, index) + '\n';
}
}
return ret;
return program;
}
} // namespace Shader::Maxwell

22
src/shader_recompiler/frontend/maxwell/program.h
View File

@ -9,28 +9,16 @@
#include <vector>
#include <boost/container/small_vector.hpp>
#include <boost/pool/pool_alloc.hpp>
#include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/function.h"
#include "shader_recompiler/frontend/ir/program.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::Maxwell {
class Program {
friend std::string DumpProgram(const Program& program);
public:
explicit Program(Environment& env, const Flow::CFG& cfg);
private:
boost::pool_allocator<IR::Block, boost::default_user_allocator_new_delete,
boost::details::pool::null_mutex>
block_alloc_pool;
boost::container::small_vector<IR::Function, 1> functions;
};
[[nodiscard]] std::string DumpProgram(const Program& program);
[[nodiscard]] IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool,
ObjectPool<IR::Block>& block_pool, Environment& env,
const Flow::CFG& cfg);
} // namespace Shader::Maxwell

2
src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_conversion_integer.cpp
View File

@ -4,7 +4,7 @@
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_multi_function.cpp
View File

@ -5,7 +5,7 @@
#include "common/bit_field.h"
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/translate/impl/load_store_attribute.cpp
View File

@ -6,7 +6,7 @@
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/translate/impl/load_store_memory.cpp
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@ -5,7 +5,7 @@
#include "common/bit_field.h"
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/translate/impl/move_register.cpp
View File

@ -5,7 +5,7 @@
#include "common/bit_field.h"
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

2
src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
View File

@ -4,7 +4,7 @@
#include "common/common_types.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/maxwell/opcode.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {

5
src/shader_recompiler/frontend/maxwell/translate/translate.cpp
View File

@ -23,8 +23,9 @@ static void Invoke(TranslatorVisitor& visitor, Location pc, u64 insn) {
}
}
IR::Block Translate(Environment& env, const Flow::Block& flow_block) {
IR::Block block{flow_block.begin.Offset(), flow_block.end.Offset()};
IR::Block Translate(ObjectPool<IR::Inst>& inst_pool, Environment& env,
const Flow::Block& flow_block) {
IR::Block block{inst_pool, flow_block.begin.Offset(), flow_block.end.Offset()};
TranslatorVisitor visitor{env, block};
const Location pc_end{flow_block.end};

7
src/shader_recompiler/frontend/maxwell/translate/translate.h
View File

@ -6,11 +6,14 @@
#include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/maxwell/location.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/frontend/maxwell/location.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::Maxwell {
[[nodiscard]] IR::Block Translate(Environment& env, const Flow::Block& flow_block);
[[nodiscard]] IR::Block Translate(ObjectPool<IR::Inst>& inst_pool, Environment& env,
const Flow::Block& flow_block);
} // namespace Shader::Maxwell

28
src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
View File

@ -19,7 +19,7 @@
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/function.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/opcode.h"
#include "shader_recompiler/frontend/ir/opcodes.h"
#include "shader_recompiler/frontend/ir/pred.h"
#include "shader_recompiler/frontend/ir/reg.h"
#include "shader_recompiler/ir_opt/passes.h"
@ -150,52 +150,52 @@ private:
void SsaRewritePass(IR::Function& function) {
Pass pass;
for (const auto& block : function.blocks) {
for (IR::Block* const block : function.blocks) {
for (IR::Inst& inst : block->Instructions()) {
switch (inst.Opcode()) {
case IR::Opcode::SetRegister:
if (const IR::Reg reg{inst.Arg(0).Reg()}; reg != IR::Reg::RZ) {
pass.WriteVariable(reg, block.get(), inst.Arg(1));
pass.WriteVariable(reg, block, inst.Arg(1));
}
break;
case IR::Opcode::SetPred:
if (const IR::Pred pred{inst.Arg(0).Pred()}; pred != IR::Pred::PT) {
pass.WriteVariable(pred, block.get(), inst.Arg(1));
pass.WriteVariable(pred, block, inst.Arg(1));
}
break;
case IR::Opcode::SetZFlag:
pass.WriteVariable(ZeroFlagTag{}, block.get(), inst.Arg(0));
pass.WriteVariable(ZeroFlagTag{}, block, inst.Arg(0));
break;
case IR::Opcode::SetSFlag:
pass.WriteVariable(SignFlagTag{}, block.get(), inst.Arg(0));
pass.WriteVariable(SignFlagTag{}, block, inst.Arg(0));
break;
case IR::Opcode::SetCFlag:
pass.WriteVariable(CarryFlagTag{}, block.get(), inst.Arg(0));
pass.WriteVariable(CarryFlagTag{}, block, inst.Arg(0));
break;
case IR::Opcode::SetOFlag:
pass.WriteVariable(OverflowFlagTag{}, block.get(), inst.Arg(0));
pass.WriteVariable(OverflowFlagTag{}, block, inst.Arg(0));
break;
case IR::Opcode::GetRegister:
if (const IR::Reg reg{inst.Arg(0).Reg()}; reg != IR::Reg::RZ) {
inst.ReplaceUsesWith(pass.ReadVariable(reg, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(reg, block));
}
break;
case IR::Opcode::GetPred:
if (const IR::Pred pred{inst.Arg(0).Pred()}; pred != IR::Pred::PT) {
inst.ReplaceUsesWith(pass.ReadVariable(pred, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(pred, block));
}
break;
case IR::Opcode::GetZFlag:
inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block));
break;
case IR::Opcode::GetSFlag:
inst.ReplaceUsesWith(pass.ReadVariable(SignFlagTag{}, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(SignFlagTag{}, block));
break;
case IR::Opcode::GetCFlag:
inst.ReplaceUsesWith(pass.ReadVariable(CarryFlagTag{}, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(CarryFlagTag{}, block));
break;
case IR::Opcode::GetOFlag:
inst.ReplaceUsesWith(pass.ReadVariable(OverflowFlagTag{}, block.get()));
inst.ReplaceUsesWith(pass.ReadVariable(OverflowFlagTag{}, block));
break;
default:
break;

11
src/shader_recompiler/main.cpp
View File

@ -56,6 +56,13 @@ int main() {
auto cfg{std::make_unique<Flow::CFG>(env, 0)};
// fmt::print(stdout, "{}\n", cfg->Dot());
Program program{env, *cfg};
fmt::print(stdout, "{}\n", DumpProgram(program));
auto inst_pool{std::make_unique<ObjectPool<IR::Inst>>()};
auto block_pool{std::make_unique<ObjectPool<IR::Block>>()};
for (int i = 0; i < 8192 * 4; ++i) {
void(inst_pool->Create(IR::Opcode::Void, 0));
}
IR::Program program{TranslateProgram(*inst_pool, *block_pool, env, *cfg)};
fmt::print(stdout, "{}\n", IR::DumpProgram(program));
}

89
src/shader_recompiler/object_pool.h Normal file
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@ -0,0 +1,89 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <type_traits>
namespace Shader {
template <typename T, size_t chunk_size = 8192>
requires std::is_destructible_v<T> class ObjectPool {
public:
~ObjectPool() {
std::unique_ptr<Chunk> tree_owner;
Chunk* chunk{&root};
while (chunk) {
for (size_t obj_id = chunk->free_objects; obj_id < chunk_size; ++obj_id) {
chunk->storage[obj_id].object.~T();
}
tree_owner = std::move(chunk->next);
chunk = tree_owner.get();
}
}
template <typename... Args>
requires std::is_constructible_v<T, Args...> [[nodiscard]] T* Create(Args&&... args) {
return std::construct_at(Memory(), std::forward<Args>(args)...);
}
void ReleaseContents() {
Chunk* chunk{&root};
if (chunk) {
const size_t free_objects{chunk->free_objects};
if (free_objects == chunk_size) {
break;
}
chunk->free_objects = chunk_size;
for (size_t obj_id = free_objects; obj_id < chunk_size; ++obj_id) {
chunk->storage[obj_id].object.~T();
}
chunk = chunk->next.get();
}
node = &root;
}
private:
struct NonTrivialDummy {
NonTrivialDummy() noexcept {}
};
union Storage {
Storage() noexcept {}
~Storage() noexcept {}
NonTrivialDummy dummy{};
T object;
};
struct Chunk {
size_t free_objects = chunk_size;
std::array<Storage, chunk_size> storage;
std::unique_ptr<Chunk> next;
};
[[nodiscard]] T* Memory() {
Chunk* const chunk{FreeChunk()};
return &chunk->storage[--chunk->free_objects].object;
}
[[nodiscard]] Chunk* FreeChunk() {
if (node->free_objects > 0) {
return node;
}
if (node->next) {
node = node->next.get();
return node;
}
node->next = std::make_unique<Chunk>();
node = node->next.get();
return node;
}
Chunk* node{&root};
Chunk root;
};
} // namespace Shader