Hi,
Is it possible to use bitwise operators in bit fields?
For example:
typedef struct Mystruct {
unsigned char A :1 ;
unsigned char B :1 ;
} Mystruct;
and assume
struct Mystruct STR_1S, STR_2S, tempSTRS = {0};
then the following line:
tempSTRS = STR_1S & STR_2S;
gives the... (3 Replies)
I am taking an online course on Unix scripting. The topic is Unix arithmetic operators and the lesson is Logical and bitwise operations. It is not clear how much storage space Unix uses to represent integers that are typed. Bitwise negation caused me to question how many bits are used to... (3 Replies)
Hi
Suppose we have these code lines:
#define _IN_USE 0x001 /* set when process slot is in use */
#define _EXITING 0x002 /* set when exit is expected */
#define _REFRESHING 0x004
...
1 main () {
2
3 unsigned r_flags =_REFRESHING;
4
5 if (r_flag &... (3 Replies)
The purpose of this article is revealing the unrevealed parts of the bitwise XOR.
As we aware, the truth table for the XOR operator is :
A B A^B
0 0 0
0 1 1
1 0 1
1 1 0
For example , 1^2 will be calculated as given below:
First the operands... (1 Reply)
please any one can suggest me how to use bitesie || opearator to do this
#initallize a=0 b=0
#condition
if then
a=0
else a=1
fi
#bitwise or opeartion b = a || b
Please view this code tag video for how to use code tags when posting code and data. (3 Replies)
Hello,
I want to compute the bitwise number of matches in pairwise fashion for all columns. The problem is I have 18486955 rows and 750 columns. Please help with code, I believe this will take a lot of time, is there a way of tracking progress?
Input
Org1 Org2 Org3
A A T
A ... (9 Replies)
Discussion started by: ritakadm
9 Replies
LEARN ABOUT OPENSOLARIS
atomic_set_long_excl
atomic_bits(9F) Kernel Functions for Drivers atomic_bits(9F)NAME
atomic_bits, atomic_set_long_excl, atomic_clear_long_excl - atomic set and clear bit operations
SYNOPSIS
#include <sys/atomic.h>
int atomic_set_long_excl(volatile ulong_t *target, uint_t bit);
int atomic_clear_long_excl(volatile ulong_t *target, uint_t bit);
DESCRIPTION
The atomic_set_long_excl() and atomic_clear_long_excl() functions perform an exclusive atomic bit set or clear operation on target. The
value of bit specifies the number of the bit to be modified within target. Bits are numbered from zero to one less than the maximum number
of bits in a long. If the value of bit falls outside of this range, the result of the operation is undefined.
RETURN VALUES
The atomic_set_long_excl() and atomic_clear_long_excl() functions return 0 if bit was successfully set or cleared. They return -1 if bit
was already set or cleared.
ERRORS
No errors are defined.
CONTEXT
These functions can be called from user, interrupt, or kernel context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
SEE ALSO atomic_add(9F), atomic_and(9F), atomic_cas(9F), atomic_dec(9F), atomic_inc(9F), atomic_or(9F), atomic_swap(9F), membar_ops(9F),
attributes(5), atomic_ops(3C)SunOS 5.11 16 Jan 2006 atomic_bits(9F)