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Sdl ?

This is not surprising at all. An rwlock can also be "rdlock"ed, while a mutex can't. This means an rwlock can be in one of the three states:

1. free
2. locked with one wrlock
3. locked with one...

Java's .class files are platform independend. You can compile the .java files on any machine with any jdk version to .class files and use them there. Just install the jdk for windows on your windows...

Well, I don't think so. Passing a "char*" to a function that expects "const char*" is perfectly legal. And if it wasn't, then the compiler would say so.

On the other hand, if the function would in...

Either the constructor of Connection, or the Query() method throws an exception of type const char *. You can catch it, by enclosing the calls with try, and adding a catch block, like:


try {
...

A web browser is a pretty big application. A minimal browser would need an http client, an html parser, and something that displays html files. Even this would be a lot of work. And this minimal...

Yeah, on second thought I realized that if someone adds the variable "end" without initializing it, the result can crash. However the correct initial value is not NULL, but start (after the first...

error in trim_copy() was a typo: "ouput" -> "output" (but no segfault)

error in trim_nocopy() was an undeclared variable (that also needs to be initialized. segfault, if the new variable is not...

Why would they crash? Please explain to me the conditions, under which that happens. I tested them, and they don't crash. The change you made has the effect, that if the input is empty, or contains...

Yes, I realized that given the alternatives I have to "die one death". I think I will make a single threaded app, that multiplexes sockets using select(). File operations will then still block, but...

After some further reading, I found out that all this is not true for regular files. select() behaves as if a file is ready for reading and writing at any time:

"File descriptors associated with...

This is all just overkill. There are three variants to do trimming in C:

1. Output in another place

void trim_copy(char *input, char *output)
{
char *end = ouput;
char c;

// skip...

This is optimizing in the wrong place. Your algorithm is O(n²), with or without register. Trimming a string can be done in O(n), which is much more efficient. On the other hand the function has not...

The HTTP Protocol is designed to always send the size of the data in the "Content-Length:" field. You must count the bytes you read after the "\r\n\r\n", so you exactly stop, when there is nothing...

Thank you, didn't know that page. This really helped, since it confirmed my expectations :) and prove all other posters here wrong (no offence)

EDIT: well, not about the thing with the first write...

I use read(), not fread(). read() could for example only return 1 byte. As all available docs say, that read() *can* return less bytes then requested. So the return value of the read() call in your...

I don't want to use tape drives. But the term "slow device" is relative. Even with a fast device, a read can block, even if it is only about a few milliseconds. In that case I can use select to watch...

Seems like the ncurses maintainers would be the right people for this question.

Seems to me that this is exactly what changes, when stdout is redirected to disk. But an fflush should always flush buffers, so a printf done before forking should not be written twice anymore.

Granted, the OP seems to have some confusion in destinguishing input from output, but I don't think anyone suggested to him to fflush stdin.

First of all, you don't "read" to the screen (or stdout), you "write" to it.

Second, I would store the number of bytes received in a variable. This way you don't need to use memset. Instead you...

It's really a lot of work to read all that code. Do you think, you could isolate the error to a smaller program?

Also: I have never used shared memory in a multithreaded program. Why are you doing...

hmm... If this doesn't apply to slow devices, then what is select() for anyway? If I am working with a fast device, I wouldn't need it in the first place.

I know I could use async. or nonblocking...

rdtsc is not good for time measurement.

The problem is, that the CPU might throttle (with it does most of the time, when all processes are blocked), so a cpu clock might mean more time in that...

as far as i know, all functions using a FILE * do buffered I/O. This means, that data is not written immediately, but when the kernel thinks, it is the right time. This is normally the case, when a...