FastAllocator Class Reference

Collaboration diagram for FastAllocator:

Classes
struct	Block

Public Types
enum	{ kBlockCount = 1500 , kMinBlockSize = 48 }

Static Public Member Functions
static void *	Allocate (size_t s)
static bool	Free (void *p)

Static Public Attributes
static Block *	mBlocks
static Block *	mFree
static size_t	mUsed

Friends
struct	Block

Detailed Description

Definition at line 112 of file nc_alloc.cpp.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
kBlockCount
kMinBlockSize

Definition at line 142 of file nc_alloc.cpp.

       {
    // Number of fast allocation blocks to create.
    kBlockCount = 1500,
 
    // You may need to adjust this number for your platform.
    // A good choice will speed tests. A bad choice will still work.
    kMinBlockSize = 48
  };

Member Function Documentation

Allocate()

static void * FastAllocator::Allocate ( size_t  s )

inlinestatic

Definition at line 115 of file nc_alloc.cpp.

                                  {
    void *result = 0;
 
    if (s <= sizeof(Block)) {
      if (mFree != 0) {
        result = mFree;
        mFree = mFree->next;
      }
      else if (mBlocks != 0 && mUsed < kBlockCount) {
        result =  (void*)&mBlocks[mUsed++];
      }
    }
    return result;
  }

Referenced by AllocateBlock().

Free()

static bool FastAllocator::Free ( void *  p )

inlinestatic

Definition at line 130 of file nc_alloc.cpp.

                            {
    Block* b = (Block*)p;
    if (mBlocks == 0 || b < mBlocks || b >= mBlocks + kBlockCount)
      return false;
    b->next = mFree;
    mFree = b;
    return true;
  }

Referenced by operator delete().

Friends And Related Function Documentation

Block

friend struct Block

friend

Definition at line 140 of file nc_alloc.cpp.

Member Data Documentation

mBlocks

FastAllocator::Block * FastAllocator::mBlocks

static

Initial value:

=
(FastAllocator::Block*)EH_CSTD::calloc( sizeof(FastAllocator::Block), FastAllocator::kBlockCount )

Definition at line 159 of file nc_alloc.cpp.

Referenced by Allocate(), and Free().

mFree

FastAllocator::Block * FastAllocator::mFree

static

Definition at line 160 of file nc_alloc.cpp.

Referenced by Allocate(), and Free().

mUsed

size_t FastAllocator::mUsed

static

Definition at line 161 of file nc_alloc.cpp.

Referenced by Allocate().

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The documentation for this class was generated from the following file:

• sdk/lib/3rdparty/stlport/test/eh/nc_alloc.cpp