newop2.cpp

C标准库源代码

// newop2 operator new(size_t, const nothrow_t&) for Microsoft C++
#include <cstdlib>
#include <new>

_C_LIB_DECL
int _callnewh(size_t size);
_END_C_LIB_DECL

void *operator new(size_t size, const std::nothrow_t&) _THROW0()
	{	// try to allocate size bytes
	void *p;
	while ((p = malloc(size)) == 0)
		{	// buy more memory or return null pointer
		_TRY_BEGIN
			if (_callnewh(size) == 0)
				break;
		_CATCH(std::bad_alloc)
			return (0);
		_CATCH_END
		}
	return (p);
	}

/*
 * Copyright (c) 1995 by P.J. Plauger.  ALL RIGHTS RESERVED. 
 * Consult your license regarding permissions and restrictions.
 */