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by: Khalid |
last post by:
II am allocating alot of memory for my problem model which uses stl containers
for these pointers,
will stl free the memory?
by other words what is the semantics of memory ownership in stl?
thanks a lot
kh
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by: Tomasz Grobelny |
last post by:
Is it possible to create for example stl queue in previously allocated
memory buffer (memory shared between two processes)? I thought of sth like
that:
queue<int>* q=new(buffer) queue<int>;
but won't integer variables (and possible others needed by queue object) be
allocated using default allocator outside the buffer? How to force
allocation in specified buffer? Access to shared memory is protected by
semaphores so the should be no...
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by: Mark |
last post by:
If you have STL containers (like list, vector,...) in
functions as automatic variables, do the nodes that
are put on the containers get buffered so they can be reused
by later container operations?
For example, if I have 10 member methods, and lots of them have
a list <Foo*> when that list is cleared or goes out
of scope, the nodes are deleted (don't worry about deleting the
Foo* themselves, they are just extra pointers to classes in...
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by: phil_gg04 |
last post by:
Dear C++ Experts,
Over the last couple of months I have been writing my first program
using shared memory. It has been something of an "in-at-the-deep-end"
experience, to say the least. At present the shared memory contains a
few fixed-size structs, but I really need to be able to store more
complex variable-sized data in there. So the next task is to work out
how to store C++ objects, and if possible STL containers, in this
shared...
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by: Ross A. Finlayson |
last post by:
I'm trying to write some C code, but I want to use C++'s std::vector.
Indeed, if the code is compiled as C++, I want the container to
actually be std::vector, in this case of a collection of value types or
std::vector<int>.
So where I would use an int* and reallocate it from time to time in C,
and randomly access it via , then I figure to copy the capacity and
reserve methods, because I just need a growable array.
I get to considering...
|
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by: Josh Mcfarlane |
last post by:
Just out of curiosity:
When would using std::list be more efficient / effective than using
other containers such as vector, deque, etc?
As far as I'm aware, list doesn't appear to be specialized for
anything.
Thanks,
Josh McFarlane
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by: bob |
last post by:
Hi,
Given:
1) Custom containers that have nothing to do with vector, deque, list,
map etc,
2) a custom version of new and delete defined for these containers,
customNew and customDelete, say. When an item is to be inserted/removed
into/from these custom containers, customNew and customDelete is
called.
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by: Vincenzo Cappello |
last post by:
I need a map that contain different object of the same base class like:
std::map< int, base_class* >
someone tell me is no correct using pointer in containers so i change to:
std::map< int, std::auto_ptr< base_class > >
someone tell me is no correct using auto_ptr in containers...
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by: Alex Vinokur |
last post by:
The memory allocation issue in embedded systems is usually critical..
How can one manage that?
1. Via 'new'
char* p = new (nothrow) char ;
if (p == 0)
{
// He we know that it is impossible to allocate the requested memory
// We can do something relevant.
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by: jimxoch |
last post by:
Hi list,
Most STL containers are storing their data on the heap. (although some
std::string implementations are notable exceptions) Of course, using
the heap as storage increases flexibility and allows the handling of
much bigger amounts of data. However, there are cases where this turns
out to be inefficient for at least two reasons: A) Allocations and
deallocations on heap are much slower. B) Memory access on stack is
more cache...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
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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: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
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: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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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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