problem in freeing a "tree" of stuctures

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Originally Posted by tabstop

And how does it "not work"?

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i get a segmentation fault

I've tried to do some print on screen to understand why
as it seems it occurs while trying to run a FreedVector(curs->point,3);
and it is not possible to print out that vector point even if curs is not a NULL pointer

So that node apparently doesn't have a point vector? Is that expected? If so, you'll have to deal with that. If not, you should check that you didn't forget to do so?

Quote:

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Originally Posted by tabstop

So that node apparently doesn't have a point vector? Is that expected? If so, you'll have to deal with that. If not, you should check that you didn't forget to do so?

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it is not expected and it shouldn't be possible
the vector point is the information of the node without that the node shouldn't even exist

edit
and I find quite strange that if there is no point vector in that node I don't get an error previously in the program while trying to use that vector that don't exist

some news, I don't know if good or bad ones
as it seems if I change the input file to an easier one, it works
or at least it does not give me the segmentation fault

so it might be a problem in the allocation rather than in freeing the memory, am I wrong?

edit

there is a way to check if the memory is freed for real? (to check if the function actually works)

Quote:

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Originally Posted by stealthisnick

some news, I don't know if good or bad ones
as it seems if I change the input file to an easier one, it works
or at least it does not give me the segmentation fault

so it might be a problem in the allocation rather than in freeing the memory, am I wrong?

edit

there is a way to check if the memory is freed for real? (to check if the function actually works)

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Most implementations of the C runtime library has some functions that tell you the state of the heap. However, those are unique to the C runtime library, and non-standard, so you'd have to tell us which C library (which compiler) you are using.

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Mats

Quote:

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Originally Posted by matsp

Most implementations of the C runtime library has some functions that tell you the state of the heap. However, those are unique to the C runtime library, and non-standard, so you'd have to tell us which C library (which compiler) you are using.

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Mats

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well, I run that program on a UNIX station so I have a command to compile and that's it, as far as I know

Quote:

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Originally Posted by stealthisnick

well, I run that program on a UNIX station so I have a command to compile and that's it, as far as I know

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That's not quite enough information to tell us what C library you are using, and as it's unique to each C library, we can't tell.

Alternatively, you could make your own malloc/free replacement functions that keep track of how much you've allocated and how much you've freed.

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Mats

Quote:

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Originally Posted by matsp

That's not quite enough information to tell us what C library you are using, and as it's unique to each C library, we can't tell.

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so how can I see what C library I'm using?

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Originally Posted by stealthisnick

so how can I see what C library I'm using?

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By either telling us what compiler it is, or by looking at the linker stage of the compilation (which you may not normally see, so you may have to change your makefile or such to get that out).

What flavour of Unix is it?

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Mats

Quote:

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Originally Posted by matsp

By either telling us what compiler it is, or by looking at the linker stage of the compilation (which you may not normally see, so you may have to change your makefile or such to get that out).

What flavour of Unix is it?

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Mats

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as I've said I have no idea what compiler it is, I just have a file with the command

Code:

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cc -g namefile.c ./lib/sol/*.o -lm -o namefile

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and that's all I know about how I compile it

about UNIX it should be (actually I'm using it remotely with X-Win32) Solaris OS (if that was the question)

Maybe this page (I didn't actually read much of it) will help:
http://developers.sun.com/solaris/ar...m_library.html

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Mats

I'll have a look, thanks