Search Results

I'm fond of this method....


class Single
{
public:
static Single &getSingle()
{
static Single theSingle;
return theSingle;
}

private:
Single(); // private constructor...

Beaten...lol. That's what I was going to post. Malloc 1gb of memory does "nothing" until you touch the pages. Replace that statement with, for example, calloc, though, and...well...just go ahead...

Mine. Why?

I want to create an abstract factory template which will allow me to pass in an "ID" for a subclass and return the singleton instance of that class stored in the factory. It'd be easy to adapt for...

Not really, because I have no idea what the dlist structure looks like. But, I'd guess you have a head pointer in dlist. So:

if (p == NULL)
{
newPosition->next = l->head;
l->head =...

I'm not sure what you want the "dlist_position" to be, but what you're doing in that insert won't work at all. How you have it coded right now is very likely to crash when executing...

Is the output of the "time" command not what you're looking for? You can execute it as:


time <executable_name> <args>

I'm only guessing without line numbers, but I'd bet the compiler is complaining about this line:


p = dlist_insert(list, p, element[0]);


Because p is, indeed, uninitialized when being...

First, I'm going to let you know that there is A LOT wrong with these programs. I'll go into a few things, then answer your questions:

1) First and foremost, an integer...

edit: nevermind...your compiler's parser is more off than my mental parser, lol.

That's why you use sigaction; if you want the system call to restart after signal then supply the SA_RESTART flag, otherwise, don't and you'll get SIGINT. While the default behavior may be different...

man 2 chmod

It describes the modes there.

sleep doesn't send SIGALRM.

At any rate, pause will work, I've seen people do:


for ( ; ; ) sleep(UINT_MAX);


And then, as mentioned, pthread_kill can wake it provided the thread hasn't...

Maybe it's this:


while (fscanf(fptr, "%lf", &fArray[i]) != EOF);

You have a semi colon after the while, so you're reading in every line from the file until EOF, then looping and doing it...

Did you change the sizeof? You don't even use buffer in the first program, so you can get rid of that. Then when you shmget pass (sizeof(int) * 2) as the size argument.

Also, to the third...

You're welcome.

That will work, there is also the ftok function. I've seen hard-coded keys and ftok used, more often the former (don't know why, really). Another method I've seen is a hard-coded...

Yes, you either need a key or to pass the segment's ID. IPC_PRIVATE is meant to be used between two programs that can pass the ID, either because one forked the other and the ID is resident, or...

As others said, you should be very wary of doing work in a signal handler. There is a short list of async-signal safe functions...

The real problem is that when you say "*str = "hello there"" what you're telling the compiler is to set the value of the memory location pointed to by str to the address of the string "hello there"...

If you remove the virtual keyword then the function doesn't get put into the virtual function table. Therefore, I believe any calls to the function are bound to the function within the type's class....

Agreed with Corona, and I was going to make the same statement, but not seeing the rest of the code, and under the assumption it works, I figured maybe it was memory mapping the file to some fixed...

I think that's probably one of the most misunderstood things about floats. Using the equals operator on them is generally a bad idea. As Corona pointed out, you should test within a range of the...

This also sounds like homework, and my bet is that they don't want you to call the system's copy function, rather they want you to open the two files in binary and read from one and write to the...

I'm not sure what you're getting at here.... Are you saying the reason to call memset is to assist the VMM in keeping up with a fast transfer?

z = (z < 0) ? z + 2*r*cos(theta) : z - 2*r*cos(theta);

Or, if you'd like:

z += (z < 0) ? 2*r*cos(theta) : -2*r*cos(theta);


edit: ugh; beaten, twice over, lol.