kc3-lang/angle/src/compiler/translator/PoolAlloc.h

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• Hash : 9d737966
  Author :
  Date : 2019-08-14T12:25:12
  

  Standardize copyright notices to project style
  
  For all "ANGLE Project" copyrights, standardize to the format specified
  by the style guide. Changes:
  - "Copyright (c)" and "Copyright(c)" changed to just "Copyright".
  - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1").
  - Fixed a small number of files that had no copyright date using the
    initial commit year from the version control history.
  - Fixed one instance of copyright being "The ANGLE Project" rather than
    "The ANGLE Project Authors"
  
  These changes are applied both to the copyright of source file, and
  where applicable to copyright statements that are generated by
  templates.
  
  BUG=angleproject:3811
  
  Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/PoolAlloc.h

• //
  // Copyright 2002 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_TRANSLATOR_POOLALLOC_H_
  #define COMPILER_TRANSLATOR_POOLALLOC_H_
  
  //
  // This header defines the pool_allocator class that allows STL containers
  // to use the angle::PoolAllocator class by using the pool_allocator
  // class as the allocator (second) template argument.
  //
  // It also defines functions for managing the GlobalPoolAllocator used by the compiler.
  //
  
  #include <stddef.h>
  #include <string.h>
  #include <vector>
  
  #include "common/PoolAlloc.h"
  
  //
  // There could potentially be many pools with pops happening at
  // different times.  But a simple use is to have a global pop
  // with everyone using the same global allocator.
  //
  extern angle::PoolAllocator *GetGlobalPoolAllocator();
  extern void SetGlobalPoolAllocator(angle::PoolAllocator *poolAllocator);
  
  //
  // This STL compatible allocator is intended to be used as the allocator
  // parameter to templatized STL containers, like vector and map.
  //
  // It will use the pools for allocation, and not
  // do any deallocation, but will still do destruction.
  //
  template <class T>
  class pool_allocator
  {
    public:
      typedef size_t size_type;
      typedef ptrdiff_t difference_type;
      typedef T *pointer;
      typedef const T *const_pointer;
      typedef T &reference;
      typedef const T &const_reference;
      typedef T value_type;
  
      template <class Other>
      struct rebind
      {
          typedef pool_allocator<Other> other;
      };
      pointer address(reference x) const { return &x; }
      const_pointer address(const_reference x) const { return &x; }
  
      pool_allocator() {}
  
      template <class Other>
      pool_allocator(const pool_allocator<Other> &p)
      {}
  
      template <class Other>
      pool_allocator<T> &operator=(const pool_allocator<Other> &p)
      {
          return *this;
      }
  
  #if defined(__SUNPRO_CC) && !defined(_RWSTD_ALLOCATOR)
      // libCStd on some platforms have a different allocate/deallocate interface.
      // Caller pre-bakes sizeof(T) into 'n' which is the number of bytes to be
      // allocated, not the number of elements.
      void *allocate(size_type n) { return getAllocator().allocate(n); }
      void *allocate(size_type n, const void *) { return getAllocator().allocate(n); }
      void deallocate(void *, size_type) {}
  #else
      pointer allocate(size_type n)
      {
          return static_cast<pointer>(getAllocator().allocate(n * sizeof(T)));
      }
      pointer allocate(size_type n, const void *)
      {
          return static_cast<pointer>(getAllocator().allocate(n * sizeof(T)));
      }
      void deallocate(pointer, size_type) {}
  #endif  // _RWSTD_ALLOCATOR
  
      void construct(pointer p, const T &val) { new ((void *)p) T(val); }
      void destroy(pointer p) { p->T::~T(); }
  
      bool operator==(const pool_allocator &rhs) const { return true; }
      bool operator!=(const pool_allocator &rhs) const { return false; }
  
      size_type max_size() const { return static_cast<size_type>(-1) / sizeof(T); }
      size_type max_size(int size) const { return static_cast<size_type>(-1) / size; }
  
      angle::PoolAllocator &getAllocator() const { return *GetGlobalPoolAllocator(); }
  };
  
  #endif  // COMPILER_TRANSLATOR_POOLALLOC_H_
  

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