I have read a document which tells me the following 4 things are done by the RAM embedded on disk driver controller. But I don't know what's difference between buffer and cache. Thanks!
RAM on disk drive controllers
1 firmware
2 speed matching buffer
3 prefetching buffer
4 cache (1 Reply)
Happy New Year!
There are currently four UNIX.COM achievement awards up for grabs, as the say. Here they are, in no particular order:
The Order of the Raven
The Order of the Hippo
The Order of the Spider
The Order of the Dragon
Don't ask me what they mean, or who who will get those... (0 Replies)
Dear All,
Here is the current status of the badging system:
The Beta 1 phase of the new badging system is close to completion.
42 prototype badges have been "allocated"
6 prototype badge slots are held in reserve
The "alert you have new badges" prototype is running and is currently... (4 Replies)
Here is the current array of the short description of badges for the new prototype badging system (Beta 1) with 42 icons allocated (prototype logic written) and 6 reserved (for future use);
<?php
$badges_desc = array(
"fauser" => "Total Post Count",
"faaward" => "First Post",
... (6 Replies)
Dear All,
We have a lot of amazing moderators and other very talented unix.com members who provide tireless top quality free technical support assistance to others. As a service to those long term unix.com members, I am making a new Patreon BBCODE badge available which can be posted in forum... (8 Replies)
Another major upgrade on the new UserCP today. I have created the "My Badges" page in the new control panel, and it's looking very cool :)
If you have visited the new UserCP recently, you will more-than-likely need to close your browser (completely) and then restart it to clear out the old... (2 Replies)
Discussion started by: Neo
2 Replies
LEARN ABOUT SUNOS
atomic_and_uchar
atomic_and(3C)atomic_and(3C)NAME
atomic_and, atomic_and_8, atomic_and_uchar, atomic_and_16, atomic_and_ushort, atomic_and_32, atomic_and_uint, atomic_and_ulong,
atomic_and_64, atomic_and_8_nv, atomic_and_uchar_nv, atomic_and_16_nv, atomic_and_ushort_nv, atomic_and_32_nv, atomic_and_uint_nv,
atomic_and_ulong_nv, atomic_and_64_nv - atomic AND operations
SYNOPSIS
#include <atomic.h>
void atomic_and_8(volatile uint8_t *target, uint8_t bits);
void atomic_and_uchar(volatile uchar_t *target, uchar_t bits);
void atomic_and_16(volatile uint16_t *target, uint16_t bits);
void atomic_and_ushort(volatile ushort_t *target, ushort_t bits);
void atomic_and_32(volatile uint32_t *target, uint32_t bits);
void atomic_and_uint(volatile uint_t *target, uint_t bits);
void atomic_and_ulong(volatile ulong_t *target, ulong_t bits);
void atomic_and_64(volatile uint64_t *target, uint64_t bits);
uint8_t atomic_and_8_nv(volatile uint8_t *target, uint8_t bits);
uchar_t atomic_and_uchar_nv(volatile uchar_t *target, uchar_t bits);
uint16_t atomic_and_16_nv(volatile uint16_t *target, uint16_t bits);
ushort_t atomic_and_ushort_nv(volatile ushort_t *target, ushort_t bits);
uint32_t atomic_and_32_nv(volatile uint32_t *target, uint32_t bits);
uint_t atomic_and_uint_nv(volatile uint_t *target, uint_t bits);
ulong_t atomic_and_ulong_nv(volatile ulong_t *target, ulong_t bits);
uint64_t atomic_and_64_nv(volatile uint64_t *target, uint64_t bits);
These functions enable the the bitwise AND of bits to the value stored in target to occur in an atomic manner.
The *_nv() variants of these functions return the new value of target.
No errors are defined.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Stable |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
atomic_add(3C), atomic_bits(3C), atomic_cas(3C), atomic_dec(3C), atomic_inc(3C), atomic_or(3C), atomic_swap(3C), membar_ops(3C),
attributes(5), atomic_ops(9F)
The *_nv() variants are substantially more expensive on some platforms than the versions that do not return values. Do not use them unless
you need to know the new value atomically.
13 May 2005 atomic_and(3C)