The problem is the printf on the last line. Have a question about this project? However, this particular error message is telling you that you are not merely converting an integer to a pointer, but that you are converting an integer of one size e. No address that func should calculate ever exceeds the maximum value of the integer type it uses? Is that a reason for the warning? I know that this warning comes because of something to do with the size of int. So am I truncating 4 of the bytes when I typecast it? But I can't find it. Unused variables, type mis-matches, strict aliasing issues, you name it. That is, nothing will be lost by the missing high 32 bits? I am combining two words and sorting the merge word in alphbetical order. See for a discussion of the issue.
Keep in mind that while we go over all tickets some may take a few days, and it's important we have the file available when we actually need it. But I really dunno how to fix it. One caveat: if serverThread is called from multiple places, the calls in all these places need to be fixed. In that case, you must ensure that the computation performed by func works in the new architecture. If its computations can be done with pointers, then do them with pointers and return pointers. And this is particular issue if you cast the output of malloc when not in the presence of a predeclaration of malloc since the compiler then assumes it returns int which is why you shouldn't cast the output of malloc in C. Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
I would appreciate any constructive criticism of my code, but please don't come here to simply tell me I am doing things in a stupid way, as that has been my experience when asking for help on here, and it is unhelpful. Then the problem occurs regardless of whether main waits for children to exit. If func is using signed integer types, consider the sign bit too. I obviously can't do that on my null values or I will have a segmentation fault. I removed all of my int casts and I still get a segmentation fault. We may need to ask questions and we do everything inside GitHub's system.
I wonder where is virtual table located in memory?. Feb 6, 2015 I create an instance of a base class not derived class and assign it to base class pointer. I understand that printf requires a char or pointer to char. It's bad style, bad probably will work. Can someone please explain this error and how to fix it? If you cannot fix func, then you can use casts to tell the compiler that you intend to do the conversions that are being performed. How to I avoid doing so? Apr 25, 2013 I having a problem which I'm not able to resovle. There are plenty of other warnings produced by compiling the codebase with -Wall that should probably be fixed up at some point too.
In any case though it's better safe than sorry; consider if the thread creation is done in a helper function called by main. I try to dereference a void pointer but I always get a C2440 error. I was wondering whether this warning warrants a resolution. Sometimes there are valid reasons to work with addresses as integers e. How do I fix these warnings? Apr 18, 2014 I cannot get the following to compile. Oct 15, 2014 If I have an array and all I have is an upper limit on how big the array can get, and if the number of elements that get added can be considerably smaller than this limit, is it always the right choice to declare a pointer and just reallocate extra memory whenever the array grows? But how do I cast the integer into a character and then get it's pointer to pass into printf? Apr 4, 2014 Here is my code.
It is likely this code was originally written for a system where the integer type returned by func had the same size as the pointer type, but you are now compiling on a system where the pointer type is larger or less than that integer size. First, if you can fix func are allowed to modify its source , then fix it. In my patch, I've fixed all the warnings I was seeing in my local compilation environment, and this included adding the -fno-strict-aliasing flag — not to suppress any warnings per se, but to resolve some warnings by preventing strict aliasing optimisations which might cause some of the code to run incorrectly. I have only just recently started programming and have very limited experience. It comes every time I typecast something in my code, which I am doing to variable addresses in order to use integer arithmetic on them. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. In the first case, the return value from func will lose information, and potentially crash or worse, if int is smaller than the size of a data pointer, which it will be on most including Windows and Linux.
I'm not sure I completely understand your question — are you referring to my patch, or to something else? Mar 12, 2012 what is the size of integer in dos? It would be far more sensible for it to be of the same pointer type as dst i. Just as a rule of thumb, it's best not to pass local addresses to other threads. But I need the program to exit when an error has occurred. I understand that I can convert between datatypes by putting the target data type in parenthises in front of the variable. If you don't then the the value of those pointers are whatever happens to be in memory at the time they are declared, which may or may not be 0.
It would also be strange because there is no cast in your code. That way we cast integers to the right size first before turning them into pointers, and pointers are first covnerted to integers of the right size before converting them into integers. When I work with pointers defined by myself I don't use casts similar to this one. I'm working on socket programming. In main you suggest passing the address of a local variable as the parameter. In this case we will download the file and upload it to the private developer repository. Since class A should have a virtual table which contains three pointers pointing to foo, foo2,foo3 separately.
However I am not sure about it. String does not occur in file. If it is not possible to make it available publicly, send us a private invitation both Dropbox and Google Drive allow that. As far as I found out I should get the error if I try to dereference without cast but in my case I cast before and still get that error. Mine is do it with for on each element but when i use sizeof it gives me size of char and not real size of the name. So the virtual table should be of size 12 bytes.
Is there a difference between a self defined pointer and array name? This is a bug, if main exits before serverThread executes, and the latter tries to dereference the address which is no longer a valid address, since newsockfdd will be freed when main exits your program will crash. Have a question about this project? This can be silenced by additionally casting func to a suitable integer type, e. So since I know the ascii value of Null is 0 I was preventing it from reaching the strcmp with the cast. But the another name is a pointer. This also included adding -Wno-unused-but-set-variable to suppress one particular type of warning, but only because I think these warnings are mostly not worth fixing in some places, the code is better with the things that the warning complains about. Sign up for a free GitHub account to open an issue and contact its maintainers and the community.