_InterlockedXor, _InterlockedXor64
Microsoft Specific
Used to perform an atomic operation (in this case, the exclusive or XOR operation) on a variable shared by multiple threads.
long _InterlockedXor(
long volatile * Value,
long Mask
);
long _InterlockedXor_acq(
long volatile * Value,
long Mask
);
long _InterlockedXor_rel(
long volatile * Value,
long Mask
);
char _InterlockedXor8(
char volatile * Value,
char Mask
);
char _InterlockedXor8_acq(
char volatile * Value,
char Mask
);
char _InterlockedXor8_rel(
char volatile * Value,
char Mask
);
short _InterlockedXor16(
short volatile * Value,
short Mask
);
short _InterlockedXor16_acq(
short volatile * Value,
short Mask
);
short _InterlockedXor16_rel(
short volatile * Value,
short Mask
);
__int64 _InterlockedXor64(
__int64 volatile * Value,
__int64 Mask
);
__int64 _InterlockedXor64_acq(
__int64 volatile * Value,
__int64 Mask
);
__int64 _InterlockedXor64_rel(
__int64 volatile * Value,
__int64 Mask
);
Parameters
- [in, out] Value
A pointer to the first operand, to be replaced by the result.
- [in] Mask
The second operand.
Return Value
The original value of the first operand.
Requirements
| Intrinsic | Architecture |
|---|---|
_InterlockedXor |
x86, IPF, x64 |
_InterlockedXor_acq |
IPF |
_InterlockedXor_rel |
IPF |
_InterlockedXor8 |
x86, IPF, x64 |
_InterlockedXor8_acq |
IPF |
_InterlockedXor8_rel |
IPF |
_InterlockedXor16 |
x86, IPF, x64 |
_InterlockedXor16_acq |
IPF |
_InterlockedXor16_rel |
IPF |
_InterlockedXor64 |
IPF, x64 |
_InterlockedXor64_acq |
IPF |
_InterlockedXor64_rel |
IPF |
Header file <intrin.h>
Remarks
The number in the name of each function specifies the bit size of the arguments.
In Visual C++ 2005, these functions behave as read-write memory barriers. For more information, see _ReadWriteBarrier.
The IPF-specific _InterlockedXor_acq, _InterlockedXor8_acq, _InterlockedXor16_acq, and _InterlockedXor64_acq intrinsic functions are the same as the corresponding functions without the acq suffix except that the operation is performed with acquire semantics, which is useful when entering a critical section.
The _InterlockedXor_rel, _InterlockedXor8_rel, _InterlockedXor16_rel, and _InterlockedXor64_rel intrinsic functions are the same as the corresponding functions without the rel suffix except that the operation is performed with release semantics, which is useful when leaving a critical section.
Example
// _InterLockedXor.cpp
#include <stdio.h>
#include <intrin.h>
#pragma intrinsic(_InterlockedXor)
int main()
{
long data1 = 0xFF00FF00;
long data2 = 0x00FFFF00;
long retval;
retval = _InterlockedXor(&data1, data2);
printf_s("0x%x 0x%x 0x%x", data1, data2, retval);
}
Output
0xffff0000 0xffff00 0xff00ff00