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Why is volatile not considered useful in multithreaded C or C++ programming?
...ic operations necessary to implement a mutex; it only has volatile to make extra guarantees about ordinary operations.
Now you have something like this:
pthread_mutex_lock( &flag_guard_mutex );
my_local_state = my_shared_flag; // critical section
pthread_mutex_unlock( &flag_guard_mutex );
...
How to make a SIMPLE C++ Makefile
...
@jcoe It does an unnecessary extra preprocessor pass to generate dependencies. Doing unnecessary work it just dissipates heat melting the ice poles and, on a bigger scale, is nearing the heat death of our universe.
– Maxim Egorushki...
How to make a great R reproducible example
... and your code in the console and get exactly the same as you have.
Give extra information
In most cases, just the R version and the operating system will suffice. When conflicts arise with packages, giving the output of sessionInfo() can really help. When talking about connections to other appli...
When to use Storyboard and when to use XIBs
... segues. It's much easier to do such a change in code.
Storyboards add two extra liabilities to your project: (1) The Storyboard Editor tool that generates the storyboard XML and (2) the runtime component that parses the XML and creates UI and controller objects from it. Both parts can have bugs tha...
Separation of business logic and data access in django
... standard method in the forms API; it is intended to replace the
'extract-data-from-form-in-view-and-do-stuff' pattern by a more testable pattern.
"""
user_id = self.cleaned_data['user_id']
user = User.objects.get(pk=user_id)
# set active flag
user...
Why is x86 ugly? Why is it considered inferior when compared to others? [closed]
...rip through memory more frequently than would otherwise be necessary. The extra instructions needed to do this take execution resources that could be spent on useful work, although efficient store-forwarding keeps the latency low. Modern implementations with register renaming onto a large physical...
Relative imports in Python 2.7
...y shouldn't do this at all for single level packages.) If we wanted to be extra-clean, we might rewrite this as, e.g.:
import os, sys
_i = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if _i not in sys.path:
sys.path.insert(0, _i)
else:
_i = None
f...
How to create a video from images with FFmpeg?
...estions/587511/concatenate-multiple-wav-files-using-single-command-without-extra-file
Tested on
ffmpeg 3.4.4, vlc 3.0.3, Ubuntu 18.04.
Bibliography
http://trac.ffmpeg.org/wiki/Slideshow official wiki
share
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HTML5 Canvas Resize (Downscale) Image High Quality?
...otal and the result will be poor as you already noticed.
Try with just one extra step, or at tops two.
Convolutions
In case of Photoshop notice that it applies a convolution after the image has been re-sampled, such as sharpen. It's not just bi-cubic interpolation that takes place so in order to ful...
How to select rows from a DataFrame based on column values?
...orm the same boolean analysis we did above. This leaves us performing one extra step to accomplish the same task.
mask = df['A'] == 'foo'
pos = np.flatnonzero(mask)
df.iloc[pos]
A B C D
0 foo one 0 0
2 foo two 2 4
4 foo two 4 8
6 foo one 6 12
7 foo three ...