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by: Anh-Tu Vo |
last post by:
Hi all,
I have a weird problem on a variable assignment. It seems that the
variable is only updated with the value at the second time the
function is called. My program looks like this:
myClass
{
typedef struct
{
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by: David Rasmussen |
last post by:
What is the difference in meaning and in consequences between
struct S
{
volatile A* a;
};
and
struct S
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by: Christopher M. Lusardi |
last post by:
Hello,
Can you tell me is it my imagination, or should I not stick a "volatile"
definition into a dot h file?
My problem is if I put my declaration in main.c before main () my code
works. But, if I move it to a dot h and include the dot h into main.c, I
get an error when I run the program.
I am using the volatile qualifier because I am using mmap.
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by: ben |
last post by:
Hello All,
I am trying to make sense of a bit of syntax, is there a guru out
there that can clear this up for me.
I have a buffer declared as
static volatile u8 buffer;
and I have a pointer to that buffer declared as
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by: Ian Pilcher |
last post by:
It's pretty common to see declarations such as:
static volatile sig_atomic_t caught_signal = 0;
C99 defines sig_atomic_t as a "... (possibly volatile-qualified) integer
type of an object that can be accessed as an atomic entity, even in the
presence of asynchronous interrupts."
Does this mean that the use of "volatile" in the above declaration is
redundant? (It sure sounds that way to me.)
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by: yaron |
last post by:
Hi all,
let be focus on sigle processor machine 32 bits.
1. with multi-threaded on single processor machine 32bit do i
have to sync access to atomic get/set properties of type less then 32 bits ?
2. for those properties is it enough to use volatile on single processor
machine ?
3 does volatile solve the problem for multi-processor machine ?
4. does the problems optimizations/reordering/caching
makes problems with multi-threading on...
|
by: venky |
last post by:
Hi all,
I'm new to group n c. i want to know in detail about volatile qualifier
and pointer to functions with examples.
thank you
|
by: Samuel R. Neff |
last post by:
When is it appropriate to use "volatile" keyword? The docs simply
state:
"
The volatile modifier is usually used for a field that is accessed by
multiple threads without using the lock Statement (C# Reference)
statement to serialize access.
"
But when is it better to use "volatile" instead of "lock" ?
|
by: C++Liliput |
last post by:
It seems that the keyword "volatile" is used to make sure that threads
reading (or writing to) the same data should see a consistent picture
of the variable i.e. updates made to the common data should
immediately get reflected to other threads that are using it. However
I have never faced this issue in y multi-threaded code even though the
common variables are not declared volatile. So is this just a matter
of coincidence that I have had...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
| |
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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