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C++ Dynamic Shared Library on Linux
... can try ldd:
LD_LIBRARY_PATH=. ldd main
Prints on my machine:
~/prj/test/shared$ LD_LIBRARY_PATH=. ldd main
linux-gate.so.1 => (0xb7f88000)
libshared.so => ./libshared.so (0xb7f85000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7e74000)
libm.so.6 => /lib/libm.so...
Lock, mutex, semaphore… what's the difference?
...uld be implemented as a simple 'boolean flag').
Busy waiting= Continuosly testing of a variable until some value appears.
Finally:
Spin-lock (aka Spinlock)= A lock which uses busy waiting. (The acquiring of the lock is made by xchg or similar atomic operations).
[No thread sleeping, mostly used ...
Why does Unicorn need to be deployed together with Nginx?
...ts creators made the decision to leverage existing software that is battle-tested and very well designed and to avoid wasting time and energy on problems already solved by other software.
But let's get technical and answer your question:
Why does Unicorn needs to be deployed together with nginx...
Why is C so fast, and why aren't other languages as fast or faster? [closed]
...be a pointer to an array of ASCII integers, which we call chars. In C, we test for character existence one at a time. In Delphi, I use Pos.
And this is just a small example. In a large program, a C programmer has to make these kinds of low-level decisions with every few lines of code. It adds u...
docker mounting volumes on host
...> /myvol/greeting
VOLUME /myvol
build the image:
$ docker build -t testing_volume .
Run the container, say container1:
$ docker run -it <image-id of above image> bash
Now run another container with volumes-from option as (say-container2)
$ docker run -it --volumes-from <id-o...
How do you validate a URL with a regular expression in Python?
... return url is not None and regex.search(url)
You can always check the latest version here: https://github.com/django/django/blob/master/django/core/validators.py#L74
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Is SHA-1 secure for password storage?
...ack is an attack where the attacker has all the data he needs in order to "test" passwords; e.g. the attacker could get a copy of the database holding the hashed passwords. In an offline attack, the attacker is limited only by his computational resources. Conversely, an online attack is an attack wh...
Why does pthread_cond_wait have spurious wakeups?
...es - How about the classic "spurious" EINTR? I will agree that constantly testing for EINTR in a loop is a tad annoying and makes code rather ugly but developers do it anyway to avoid random breakages.
– CubicleSoft
May 23 '16 at 9:42
...
Cocoa: What's the difference between the frame and the bounds?
...lf
In addition to reading the above articles, it helps me a lot to make a test app. You might want to try to do something similar. (I got the idea from this video course but unfortunately it isn't free.)
Here is the code for your reference:
import UIKit
class ViewController: UIViewController {...
What does “fragment” mean in ANTLR?
...arser.ContentContext):
pass
# (For Case1 Only) enable it when testing Case1
# Exit a parse tree produced by AlphabetParser#rule0.
def exitRule0(self, ctx:AlphabetParser.Rule0Context):
print(ctx.getText())
# end-of-class
def main():
file_name = sys.argv[1]
input ...