_InterlockedAnd, _InterlockedAnd64
Microsoft Specific
Used to perform an atomic AND operation on a variable shared by multiple threads.
long _InterlockedAnd(
long volatile * value,
long mask
);
long _InterlockedAnd_acq(
long volatile * value,
long mask
);
long _InterlockedAnd_rel(
long volatile * value,
long mask
);
char _InterlockedAnd8(
char volatile * value,
char mask
);
char _InterlockedAnd8_acq(
char volatile * value,
char mask
);
char _InterlockedAnd8_rel(
char volatile * value,
char mask
);
short _InterlockedAnd16(
short volatile * value,
short mask
);
short _InterlockedAnd16_acq(
short volatile * value,
short mask
);
short _InterlockedAnd16_rel(
short volatile * value,
short mask
);
__int64 _InterlockedAnd64(
__int64 volatile* value,
__int64 mask
);
__int64 _InterlockedAnd64_acq(
__int64 volatile* value,
__int64 mask
);
__int64 _InterlockedAnd64_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 |
|---|---|
_InterlockedAnd |
x86, IPF, x64 |
_InterlockedAnd_acq |
IPF |
_InterlockedAnd_rel |
IPF |
_InterlockedAnd8 |
x86, IPF, x64 |
_InterlockedAnd8_acq |
IPF |
_InterlockedAnd8_rel |
IPF |
_InterlockedAnd16 |
x86, IPF, x64 |
_InterlockedAnd16_acq |
IPF |
_InterlockedAnd16_rel |
IPF |
_InterlockedAnd64 |
IPF, x64 |
_InterlockedAnd64_acq |
IPF |
_InterlockedAnd64_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 _InterlockedAnd_acq, _InterlockedAnd8_acq, _InterlockedAnd16_acq, and _InterlockedAnd64_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 _InterlockedAnd_rel, _InterlockedAnd8_rel, _InterlockedAnd16_rel, and _InterlockedAnd64_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
// InterlockedAnd.cpp
// Compile with: /Oi
#include <stdio.h>
#include <intrin.h>
#pragma intrinsic(_InterlockedAnd)
int main()
{
long data1 = 0xFF00FF00;
long data2 = 0x00FFFF00;
long retval;
retval = _InterlockedAnd(&data1, data2);
printf_s("0x%x 0x%x 0x%x", data1, data2, retval);
}
Output
0xff00 0xffff00 0xff00ff00