IsBadHugeWritePtr
The IsBadHugeWritePtr
function verifies that the calling process has write access to the specified
range of memory.
BOOL IsBadHugeWritePtr(
|
LPVOID lp, |
// address of
memory block |
|
UINT ucb |
// size of block |
|
); |
|
Parameters
lp
Points to the
first byte of the memory block.
ucb
Specifies the
size, in bytes, of the memory block. If this parameter is zero, the return
value is zero.
Return Values
If the
calling process has write access to all bytes in the specified memory range, the
return value is zero.
If the
calling process does not have write access to all bytes in the specified memory
range, the return value is nonzero. To get extended error information, call GetLastError
Remarks
If the
calling process has write access to some, but not all, of the bytes in the
specified memory range, the return value is nonzero.
In a
preemptive multitasking environment, it is possible for some other thread to
change the process s access to the memory being tested. Even when the function
indicates that the process has write access to the specified memory, you should
use structured exception handling when attempting to access the memory. Use of
structured exception handling enables the system to notify the process if an
access violation exception occurs, giving the process an opportunity to handle
the exception.
IsBadHugeWritePtr is available for compatibility with earlier versions
of Windows, which distinguish between normal memory allocations and huge
allocations occupying multiple segments. In the Win32 API, this function is
equivalent to the IsBadWritePtr function.
See Also