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by: Brian Genisio |
last post by:
Hi all,
I am developing some software, that creates a tree of information. For
each node, currently I am overriding the new operator, because it is a
requirement that after initialization, no new memory may be allocated.
It also needs to be thread safe, and each thread has a context, so any
allocation of nodes currently looks like this:
new (context) Node(...);
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by: Grahamo |
last post by:
Hi,
can anybody tell me where I can get the boiler plate code for
std::allocator. I need to have my version of new and delete called and
want to get reference code. My compilers headers are all over the place
with #ifdefs and what not, I'd like a clean copy.
thanks much
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by: Alex Vinokur |
last post by:
Compiler GNU g++ version 3.4.4 (cygming special)
Custom allocator for vector (see below) checks a return value of
'operator new'.
If that value is NULL, the allocator "allocates" no memory.
Nevertheless the allocator produces "Segmentation fault (core dumped)".
Is it possible to correct that allocator in order to avoid such
behavior
------ foo.cpp ------
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by: joe |
last post by:
I have created a custom allocator for a multiset, and I am having a
problem it seems because while the allocator has memory available to
be used which is returned, the objects are never constructed on top of
that memory. I expected my "construct" method to be called to handle
this, but no one calls it.
No more than MAX_OBJS object of class Obj will ever be allocated.
#include<iostream>
#include <set>
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by: joe |
last post by:
I have written a custom std allocator which follows the example in
Stroustrup's book.
I'm seeing a behavior I don't understand.
My allocate method within the allocator looks like the following:
(FooAllocator<T>)
pointer allocate(size_type cnt, typename
std::allocator<void>::const_pointer hint = 0)
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by: OuaisBla |
last post by:
Although STL container can't support object by reference as a template argument. To make thing worse, allocator can't support stack based allocation.
So:
std::deque<std::string const &>
is impossible to declare.
But, it is also more than impossible to find a workaroung using a custom STL allocator because of the ugly and not object oriented design that was used. Thanks to many STL contributor for this, specially to PJ Plauger where...
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by: Mike |
last post by:
Hi,
I have a simple "memPool' class that simply maintains a linked list of
chunks from which allocation requests are made. The whole thing is
deleted all at once upon destruction. So far, so good.
Then I tried to make an allocator for this and use it with std::list
with no success. I modeled my allocator code from gcc's
new_allocator.h. I modified the allocate() and deallocate() functions
and copy constructors, and added a...
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by: PeterAPIIT |
last post by:
Hello all C++ expert programmer,
i have wrote partial general allocator for my container.
After reading standard C++ library and code guru article, i have
several questions.
1. Why allocator write forward declaration then allocation for void*
rather than directly wrote allocator first ?
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by: Phil Bouchard |
last post by:
I am currently writting a smart pointer which is reasonnably stable and I
decided supporting allocators for completion because of its increase in
efficiency when the same pool used by containers is shared. I was told the
new standards are being finalized and I am hoping minor but important
changes could be applied before anything else.
To give a quick overview on the current status of this topic, you will find
below the latest text...
|
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...
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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...
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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...
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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...
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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: 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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