28 windows_28_windows_heap 堆

windows_28_windows_heap 堆

// windows_28_windows_heap.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <windows.h>
#include <stdlib.h>
void HeapInfo( )
{
  //默认堆句柄
  HANDLE hHeap = GetProcessHeap( );
  printf( "Default Heap:%p\n", hHeap );
  //所有堆的句柄
  HANDLE hHeaps[256] = { 0 };
  DWORD nCount = GetProcessHeaps( 256, hHeaps );
  printf( "All Heap:%d\n", nCount );
  for (DWORD nIndex = 0; nIndex < nCount; nIndex++)
  {
    printf( "\t%d: %p\n", nIndex + 1, hHeaps[nIndex] );
  }
}
void Heap( )
{
  HeapInfo( );//堆测试
  //1、创建堆
  //HeapCreate
  HANDLE hHeap = HeapCreate( HEAP_GENERATE_EXCEPTIONS, 1024 * 1024, 0 );
  HeapInfo( ); //堆测试
  //2、分配内存
  //HeapAlloc
  CHAR *pszBuf = (CHAR*)HeapAlloc( hHeap, HEAP_ZERO_MEMORY, 100 );
  //3、使用内存
  printf( "HeapCreate:%p\n", hHeap );
  printf( "HeapCreateBuf:%p\n", pszBuf );
  //strcpy_s( pszBuf, ( rsize_t)strlen( "hello Heap\n" ), "hello Heap\n" );
  //printf( "%s", pszBuf ); 
  //4、释放内存
  //HeapFree
  HeapFree( hHeap, 0, pszBuf );
  //5、释放堆
  //HeapDestroy
  HeapDestroy( hHeap );
  HeapInfo( );//堆测试
}
int _tmain(int argc, _TCHAR* argv[])
{
  //调试看代码
  CHAR *pszBuf = (CHAR*)malloc( 100 );
  
  Heap( ); 
	return 0;
}

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