MultiThreading in C++

[ktxn1020]

Hi,

I am pretty new to multithreaded programming. I have a question with a
hope someone can help me out.

I want to find distances between points using thread (Win MFC)

For instance distance from:
p1 to p2, p3, p4, p5
p2 to p1, p3, p4, p5
p3 to p1, p2, p4, p5
p4 to p1, p2, p3, p5
p5 to p1, p2, p3, p4

with

p1(x1, y1) = p1(42.67,73.75)
p2(x2, y2) = p2 (61.22, 149.9)
p3(x3, y3) = p3(30.27, 97.73)
p4(x4, y4) = p4(35.18,101.83)
p5(x5, y5) = p5(41.15, 104.87)


using formular distance = square root (square (x2 - x1) + square (y2 -
y1))

How can I do it and what is the best way to do this?

Thanks in advance,

 

[Gennady Bystritsky]

Hi,

I am pretty new to multithreaded programming. I have a question with
a hope someone can help me out.

I want to find distances between points using thread (Win MFC)

For instance distance from:
p1 to p2, p3, p4, p5
p2 to p1, p3, p4, p5
p3 to p1, p2, p4, p5
p4 to p1, p2, p3, p5
p5 to p1, p2, p3, p4

with

p1(x1, y1) = p1(42.67,73.75)
p2(x2, y2) = p2 (61.22, 149.9)
p3(x3, y3) = p3(30.27, 97.73)
p4(x4, y4) = p4(35.18,101.83)
p5(x5, y5) = p5(41.15, 104.87)


using formular distance = square root (square (x2 - x1) + square (y2
- y1))

How can I do it and what is the best way to do this?

Thanks in advance,

The best way is to do your school assignments yourself ;-), you will
benefit from it in the future the great deal. Besides, it may be the
wrong list as Ruby is discussed here.

Gennady.

 

[Avdi Grimm]

Hi,

I am pretty new to multithreaded programming. I have a question with a
hope someone can help me out.

First, this is a mailing list for the Ruby programming language, not
C++. You would probably have better luck on a mailing list devoted to
C++ programming, or on the comp.lang.c++ newsgroup.

Second, why are on earth are you using threads to solve the problem you stated?

 

[Logan Capaldo]

The best way to solve this problem is not to use threads. It's local-compute
and local-memory bound so there is no capturable system latency. The problem
appears to be parallelizable to some degree. If you are sure you'll be
running it on multi-processor or multicore hardware, then break up the
dataset into multiple chunks, and run each one through a separate process.
Threads add nothing here.

*applauds*

 

[David Vallner]

If you are sure you'll be
running it on multi-processor or multicore hardware, then break up the
dataset into multiple chunks, and run each one through a separate
process.
Threads add nothing here.

Threads for a single process only get scheduled on one of the cores? This
is new to me, I thought at least on Windowsen, threads are the base
scheduling unit.

David Vallner

 

[Patrick Hurley]

Threads for a single process only get scheduled on one of the cores? This
is new to me, I thought at least on Windowsen, threads are the base
scheduling unit.

Difference between a Windows (native) thread and a Ruby (green)
thread. The Ruby interpreter does not (yet) support native threads.

pth

 

[David Vallner]

Difference between a Windows (native) thread and a Ruby (green)
thread. The Ruby interpreter does not (yet) support native threads.

The whole thread is horribly off-topic with C++ and MFC being involved
from the beginning from someone who thought ruby-talk is there to work out
his homework. So the threads in my (equally off-topic) question are in
fact native Win32 threads.

David Vallner