Rename fletch -> dartino

platforms/stm/disco_fletch/src/page_allocator.h

-// Copyright (c) 2016, the Dartino project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE.md file.
-
-#ifndef PLATFORMS_STM_DISCO_FLETCH_SRC_PAGE_ALLOCATOR_H_
-#define PLATFORMS_STM_DISCO_FLETCH_SRC_PAGE_ALLOCATOR_H_
-
-#include <cinttypes>
-#include <cstdlib>
-#include <cstring>
-
-#include "platforms/stm/disco_fletch/src/globals.h"
-
-class PageAllocator {
- public:
-  PageAllocator() { Initialize(); }
-
-  void Initialize() {
-    // The initialization must be simple, as it can be called early
-    // during startup before the C++-runtime is fully initialized.
-    memset(&arenas_, 0, kMaxArenas * sizeof(Arena));
-  }
-
-  // Add a section of memory to the allocator.
-  //
-  // The arguments map and map_size can be used to pass a memory area
-  // for the map of allocated/un-allocated pages. This memory area
-  // uses one byte per page. If this memory area is not passed or is
-  // to small for the number of pages in the area this map will be
-  // allocated in the first page in the area.
-  //
-  // Returns the bit in the arenas bitmap representing this
-  // arena. This bit can be used in the call to AllocatePages.
-  uint32_t AddArena(const char* name, uintptr_t start, size_t size,
-                    uint8_t* map = NULL, size_t map_size = 0);
-
-  // Allocate pages from an arena. The arenas_bitmap specifies the
-  // arenas to try. The default is to only allocate in the initial
-  // arena added.
-  void* AllocatePages(size_t pages, uint32_t arenas_bitmap = 0x1);
-  void FreePages(void* start, size_t pages);
-
-  static size_t PagesForBytes(size_t bytes) {
-    return ROUNDUP(bytes, PAGE_SIZE) / PAGE_SIZE;
-  }
-
- private:
-  class Arena {
-   public:
-    void Initialize(const char* name, uintptr_t start, size_t size,
-                    uint8_t* map, size_t map_size);
-    void* AllocatePages(size_t pages);
-    void FreePages(void* start, size_t pages);
-
-    bool IsFree() { return pages_ == 0; }
-    bool ContainsPageAt(void* start) {
-      return base_ <= start && start < base_ + (pages_ << PAGE_SIZE_SHIFT);
-    }
-
-   private:
-    const char* name_;
-    size_t pages_;
-    uint8_t* base_;
-    uint8_t* map_;
-  };
-
-  static const int kMaxArenas = 3;
-  Arena arenas_[kMaxArenas];
-};
-
-#endif  // PLATFORMS_STM_DISCO_FLETCH_SRC_PAGE_ALLOCATOR_H_