src: remove unused freelist.h header

Always easy enough to re-introduce if we do need it.

PR-URL: https://github.com/nodejs/node/pull/20544
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Matheus Marchini <matheus@sthima.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

1 files changed, 0 insertions, 92 deletions

diff --git a/src/freelist.h b/src/freelist.h
deleted file mode 100644
index 7dff56a35d..0000000000
--- a/src/freelist.h
+++ /dev/null
@@ -1,92 +0,0 @@
-#ifndef SRC_FREELIST_H_
-#define SRC_FREELIST_H_
-
-#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
-
-#include "util.h"
-
-namespace node {
-
-struct DefaultFreelistTraits;
-
-template <typename T,
-          size_t kMaximumLength,
-          typename FreelistTraits = DefaultFreelistTraits>
-class Freelist {
- public:
-  typedef struct list_item {
-    T* item = nullptr;
-    list_item* next = nullptr;
-  } list_item;
-
-  Freelist() {}
-  ~Freelist() {
-    while (head_ != nullptr) {
-      list_item* item = head_;
-      head_ = item->next;
-      FreelistTraits::Free(item->item);
-      free(item);
-    }
-  }
-
-  void push(T* item) {
-    if (size_ > kMaximumLength) {
-      FreelistTraits::Free(item);
-    } else {
-      size_++;
-      FreelistTraits::Reset(item);
-      list_item* li = Calloc<list_item>(1);
-      li->item = item;
-      if (head_ == nullptr) {
-        head_ = li;
-        tail_ = li;
-      } else {
-        tail_->next = li;
-        tail_ = li;
-      }
-    }
-  }
-
-  T* pop() {
-    if (head_ != nullptr) {
-      size_--;
-      list_item* cur = head_;
-      T* item = cur->item;
-      head_ = cur->next;
-      free(cur);
-      return item;
-    } else {
-      return FreelistTraits::template Alloc<T>();
-    }
-  }
-
- private:
-  size_t size_ = 0;
-  list_item* head_ = nullptr;
-  list_item* tail_ = nullptr;
-};
-
-struct DefaultFreelistTraits {
-  template <typename T>
-  static T* Alloc() {
-    return ::new (Malloc<T>(1)) T();
-  }
-
-  template <typename T>
-  static void Free(T* item) {
-    item->~T();
-    free(item);
-  }
-
-  template <typename T>
-  static void Reset(T* item) {
-    item->~T();
-    ::new (item) T();
-  }
-};
-
-}  // namespace node
-
-#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
-
-#endif  // SRC_FREELIST_H_