_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.
| 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>
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.
// 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
