Functions: move CPPType creation related code to separate header

This does not need to be included everywhere, because it is only
needed in very few translation units that actually define CPPType's.

1 files changed, 287 insertions, 0 deletions

diff --git a/source/blender/functions/FN_cpp_type_make.hh b/source/blender/functions/FN_cpp_type_make.hh
new file mode 100644
index 00000000000..342161d01b6
--- /dev/null
+++ b/source/blender/functions/FN_cpp_type_make.hh
@@ -0,0 +1,287 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+/** \file
+ * \ingroup fn
+ */
+
+#include "FN_cpp_type.hh"
+
+namespace blender::fn::cpp_type_util {
+
+template<typename T> void construct_default_cb(void *ptr)
+{
+  new (ptr) T;
+}
+template<typename T> void construct_default_n_cb(void *ptr, int64_t n)
+{
+  blender::default_construct_n(static_cast<T *>(ptr), n);
+}
+template<typename T> void construct_default_indices_cb(void *ptr, IndexMask mask)
+{
+  mask.foreach_index([&](int64_t i) { new (static_cast<T *>(ptr) + i) T; });
+}
+
+template<typename T> void destruct_cb(void *ptr)
+{
+  (static_cast<T *>(ptr))->~T();
+}
+template<typename T> void destruct_n_cb(void *ptr, int64_t n)
+{
+  blender::destruct_n(static_cast<T *>(ptr), n);
+}
+template<typename T> void destruct_indices_cb(void *ptr, IndexMask mask)
+{
+  T *ptr_ = static_cast<T *>(ptr);
+  mask.foreach_index([&](int64_t i) { ptr_[i].~T(); });
+}
+
+template<typename T> void copy_to_initialized_cb(const void *src, void *dst)
+{
+  *static_cast<T *>(dst) = *static_cast<const T *>(src);
+}
+template<typename T> void copy_to_initialized_n_cb(const void *src, void *dst, int64_t n)
+{
+  const T *src_ = static_cast<const T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  for (int64_t i = 0; i < n; i++) {
+    dst_[i] = src_[i];
+  }
+}
+template<typename T>
+void copy_to_initialized_indices_cb(const void *src, void *dst, IndexMask mask)
+{
+  const T *src_ = static_cast<const T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { dst_[i] = src_[i]; });
+}
+
+template<typename T> void copy_to_uninitialized_cb(const void *src, void *dst)
+{
+  blender::uninitialized_copy_n(static_cast<const T *>(src), 1, static_cast<T *>(dst));
+}
+template<typename T> void copy_to_uninitialized_n_cb(const void *src, void *dst, int64_t n)
+{
+  blender::uninitialized_copy_n(static_cast<const T *>(src), n, static_cast<T *>(dst));
+}
+template<typename T>
+void copy_to_uninitialized_indices_cb(const void *src, void *dst, IndexMask mask)
+{
+  const T *src_ = static_cast<const T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { new (dst_ + i) T(src_[i]); });
+}
+
+template<typename T> void move_to_initialized_cb(void *src, void *dst)
+{
+  blender::initialized_move_n(static_cast<T *>(src), 1, static_cast<T *>(dst));
+}
+template<typename T> void move_to_initialized_n_cb(void *src, void *dst, int64_t n)
+{
+  blender::initialized_move_n(static_cast<T *>(src), n, static_cast<T *>(dst));
+}
+template<typename T> void move_to_initialized_indices_cb(void *src, void *dst, IndexMask mask)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { dst_[i] = std::move(src_[i]); });
+}
+
+template<typename T> void move_to_uninitialized_cb(void *src, void *dst)
+{
+  blender::uninitialized_move_n(static_cast<T *>(src), 1, static_cast<T *>(dst));
+}
+template<typename T> void move_to_uninitialized_n_cb(void *src, void *dst, int64_t n)
+{
+  blender::uninitialized_move_n(static_cast<T *>(src), n, static_cast<T *>(dst));
+}
+template<typename T> void move_to_uninitialized_indices_cb(void *src, void *dst, IndexMask mask)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { new (dst_ + i) T(std::move(src_[i])); });
+}
+
+template<typename T> void relocate_to_initialized_cb(void *src, void *dst)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  *dst_ = std::move(*src_);
+  src_->~T();
+}
+template<typename T> void relocate_to_initialized_n_cb(void *src, void *dst, int64_t n)
+{
+  blender::initialized_relocate_n(static_cast<T *>(src), n, static_cast<T *>(dst));
+}
+template<typename T> void relocate_to_initialized_indices_cb(void *src, void *dst, IndexMask mask)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) {
+    dst_[i] = std::move(src_[i]);
+    src_[i].~T();
+  });
+}
+
+template<typename T> void relocate_to_uninitialized_cb(void *src, void *dst)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  new (dst_) T(std::move(*src_));
+  src_->~T();
+}
+template<typename T> void relocate_to_uninitialized_n_cb(void *src, void *dst, int64_t n)
+{
+  blender::uninitialized_relocate_n(static_cast<T *>(src), n, static_cast<T *>(dst));
+}
+template<typename T>
+void relocate_to_uninitialized_indices_cb(void *src, void *dst, IndexMask mask)
+{
+  T *src_ = static_cast<T *>(src);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) {
+    new (dst_ + i) T(std::move(src_[i]));
+    src_[i].~T();
+  });
+}
+
+template<typename T> void fill_initialized_cb(const void *value, void *dst, int64_t n)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  T *dst_ = static_cast<T *>(dst);
+
+  for (int64_t i = 0; i < n; i++) {
+    dst_[i] = value_;
+  }
+}
+template<typename T> void fill_initialized_indices_cb(const void *value, void *dst, IndexMask mask)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { dst_[i] = value_; });
+}
+
+template<typename T> void fill_uninitialized_cb(const void *value, void *dst, int64_t n)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  T *dst_ = static_cast<T *>(dst);
+
+  for (int64_t i = 0; i < n; i++) {
+    new (dst_ + i) T(value_);
+  }
+}
+template<typename T>
+void fill_uninitialized_indices_cb(const void *value, void *dst, IndexMask mask)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  T *dst_ = static_cast<T *>(dst);
+
+  mask.foreach_index([&](int64_t i) { new (dst_ + i) T(value_); });
+}
+
+template<typename T> void debug_print_cb(const void *value, std::stringstream &ss)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  ss << value_;
+}
+
+template<typename T> bool is_equal_cb(const void *a, const void *b)
+{
+  const T &a_ = *static_cast<const T *>(a);
+  const T &b_ = *static_cast<const T *>(b);
+  return a_ == b_;
+}
+
+template<typename T> uint64_t hash_cb(const void *value)
+{
+  const T &value_ = *static_cast<const T *>(value);
+  return DefaultHash<T>{}(value_);
+}
+
+}  // namespace blender::fn::cpp_type_util
+
+namespace blender::fn {
+
+template<typename T>
+inline std::unique_ptr<const CPPType> create_cpp_type(StringRef name, const T &default_value)
+{
+  using namespace cpp_type_util;
+  const CPPType *type = new CPPType(name,
+                                    sizeof(T),
+                                    alignof(T),
+                                    std::is_trivially_destructible_v<T>,
+                                    construct_default_cb<T>,
+                                    construct_default_n_cb<T>,
+                                    construct_default_indices_cb<T>,
+                                    destruct_cb<T>,
+                                    destruct_n_cb<T>,
+                                    destruct_indices_cb<T>,
+                                    copy_to_initialized_cb<T>,
+                                    copy_to_initialized_n_cb<T>,
+                                    copy_to_initialized_indices_cb<T>,
+                                    copy_to_uninitialized_cb<T>,
+                                    copy_to_uninitialized_n_cb<T>,
+                                    copy_to_uninitialized_indices_cb<T>,
+                                    move_to_initialized_cb<T>,
+                                    move_to_initialized_n_cb<T>,
+                                    move_to_initialized_indices_cb<T>,
+                                    move_to_uninitialized_cb<T>,
+                                    move_to_uninitialized_n_cb<T>,
+                                    move_to_uninitialized_indices_cb<T>,
+                                    relocate_to_initialized_cb<T>,
+                                    relocate_to_initialized_n_cb<T>,
+                                    relocate_to_initialized_indices_cb<T>,
+                                    relocate_to_uninitialized_cb<T>,
+                                    relocate_to_uninitialized_n_cb<T>,
+                                    relocate_to_uninitialized_indices_cb<T>,
+                                    fill_initialized_cb<T>,
+                                    fill_initialized_indices_cb<T>,
+                                    fill_uninitialized_cb<T>,
+                                    fill_uninitialized_indices_cb<T>,
+                                    debug_print_cb<T>,
+                                    is_equal_cb<T>,
+                                    hash_cb<T>,
+                                    static_cast<const void *>(&default_value));
+  return std::unique_ptr<const CPPType>(type);
+}
+
+}  // namespace blender::fn
+
+#define MAKE_CPP_TYPE(IDENTIFIER, TYPE_NAME) \
+  template<> const blender::fn::CPPType &blender::fn::CPPType::get<TYPE_NAME>() \
+  { \
+    static TYPE_NAME default_value; \
+    static std::unique_ptr<const CPPType> cpp_type = blender::fn::create_cpp_type<TYPE_NAME>( \
+        STRINGIFY(IDENTIFIER), default_value); \
+    return *cpp_type; \
+  } \
+  /* Support using `CPPType::get<const T>()`. Otherwise the caller would have to remove const. */ \
+  template<> const blender::fn::CPPType &blender::fn::CPPType::get<const TYPE_NAME>() \
+  { \
+    return blender::fn::CPPType::get<TYPE_NAME>(); \
+  }