Suppose I have the following C++ class: class Foo { double bar(double sth); }; double Foo::bar(double sth) { double a,b,c,d,e,f a = b = c = d = e = f = 0; /* do stuff with a..f and sth */ } The function bar() will be called millions of times in a loop. Obviously, each time it's called, the variables a..f have to be allocated....
Hello, If we have this code in our interface .h file: @interface CarModelSelectViewController : UITableViewController { NSString *fieldNameToStoreModel; NSFetchedResultsController *fetchedResultsController; NSManagedObjectContext *managedObjectContext; DataEntered *dataEntered; } @property (nonatomic, retain) NSString *fieldNameTo...
I understand the purpose of the NULL constant in C/C++, and I understand that it needs to be represented some way internally. My question is: Is there some fundamental reason why the 0-address would be an invalid memory-location for an object in C/C++? Or are we in theory "wasting" one byte of memory due to this reservation? ...
The MFC program I am debugging is printing this message in the "Output" window in Visual Studio 9.0: HEAP[AppName.exe]: Invalid allocation size - 99999998 (exceeded 7ffdefff) I'm pretty sure this is due to a bad "new", uninitialized variable or similar error. The question is: how do I get the debugger to stop on this message so that ...
Hi, Is it the correct way of allocating memory to a char*. char* sides ="5"; char* tempSides; tempSides = (char*)malloc(strlen(inSides) * sizeof(char)); ...
I have tested my iphone app using XCode and instrument. I am watching the memory allocation tables, its showing me that every things is increasing i.e Bytes, Live Bytes and so on. What does it means? Am i not deallocating the objects? Can i find which objects are not deallocating using instruments? ...
Hello, Has anybody used SmallObjectAllocator from Modern C++ Design by Andrei Alexandrescu in a big project? I want to implement this allocator but I need some opinions about it before using it in my project. I made some tests and it seems very fast, but the tests were made in a small test environment. I want to know how fast it is whe...
When editing a large fla (400mb - don't ask!) Flash will sometimes run out of memory and tell me to allocate more memory (in Finder I think). Obviously these are instructions for Mac that have erroneously made it to the Windows version - but is there anything I can do to allocate more memory in Windows Vista? ...
I have been assigned to work on some legacy C++ code in MFC. One of the things I am finding all over the place are allocations like the following: struct Point { float x,y,z; }; ... void someFunc( void ) { int numPoints = ...; Point* pArray = (Point*)new BYTE[ numPoints * sizeof(Point) ]; ... //do some stuff with points...
Do I need to allocate memory when performing a Delphi string copy? I've a function which posts a Windows message to another form in my application. It looks something like this: // Note: PThreadMessage = ^TThreadMessage; TThreadMessage = String; function PostMyMessage( aStr : string ); var gMsgPtr : PThreadMessage; gStrLen : Int...
I was wondering how I could allocate (and De-Allocate) an array of char pointers (char*[64]) in C. I've looked around on the web for examples but they all focus on other datatypes or one dimension arrays. ...
I have a UIViewController and I'm noticing that I've done something to where the didReceiveMemoryWarning method is getting called every time I run it on an actual device. I've run the project with Run > Run With Performance Tool > Object Allocations (and Leaks also). There are no leaks but I have no idea how to read or understand the "...
I'm sorry to ask such a simple question, but it's a specific question I've not been able to find an answer for. I'm not a native objective-c programmer, so I apologise if I use any C# terms! If I define an object in test.h @interface test : something { NSString *_testString; } Then initialise it in test.m -(id)init { _test...
I've slurped in a big file using File::Slurp but given the size of the file I can see that I must have it in memory twice or perhaps it's getting inflated by being turned into 16 bit unicode. How can I best diagnose that sort of a problem in Perl? The file I pulled in is 800mb in size and my perl process that's analysing that data has ...
How does one use VirtualAllocEx do make room for a code cave? I am currently in possession of a piece of software with very little "free space" and i read that VirtualAllocEx is used for making this space.. Thanks! Jake ...
Having tried this int main(void) { int a[10]; a[20]=5; } gcc -Wall -O2 main.c It gives me no warning... It's gcc within windows (mingw) and I am not able to detect this kind of boundary limit bug how to tell compiler to check it? can mingw do it? thanks ...
This might be a dupe. I did not find enough information on this. I was discussing memory allocation for collections in .Net. Where is the memory for elements allocated in a collection? List<int> myList = new List<int>(); The variable myList is allocated on stack and it references the List object created on heap. The question is wh...
Hi all, I need to optimize the RAM usage of my application. PLEASE spare me the lectures telling me I shouldn't care about memory when coding Python. I have a memory problem because I use very large default-dictionaries (yes, I also want to be fast). My current memory consumption is 350MB and growing. I already cannot use shared hosting...
The code for this question is too long to be of any use. But I'm pretty sure my problem has to do with releasing a class. I have a helper class, ConnectionHelper.h/.m, that handles a NSURLConnection for me. Basically, I give it the URL I want and it returns the data (it happens to do a quick json parse on it too). It has a delegate w...
Hi, We have sql 2005 32 bit running on win 2003 64 bit box containing 5 gb RAM. Is there a way that sql starts using more than 2 gb? some switch or some setting in sql server? When I go to my sql server properties and try to increase the max server memory to > 2GB, it reverts back to old 2 GB. Thanks, Anand Correction - Guys: I nev...