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Mutex example / tutorial? [closed]
... {
using namespace std;
this_thread::sleep_for(chrono::seconds(5));
// set event by setting the bool variable to true
// then notifying via the condition variable
m_bQuit = true;
cvQuit.notify_all();
}
...
Why do pthreads’ condition variable functions require a mutex?
...hat it was signaled (it is stateless). So then the original thread goes to sleep on the stateless synchronization object, and does not wake up, even though the condition it needs has already become true: lost wakeup.
The condition variable wait functions avoid the lost wake up by making sure that t...
How to measure time in milliseconds using ANSI C?
...fday(&tval_before, NULL);
// Some code you want to time, for example:
sleep(1);
gettimeofday(&tval_after, NULL);
timersub(&tval_after, &tval_before, &tval_result);
printf("Time elapsed: %ld.%06ld\n", (long int)tval_result.tv_sec, (long int)tval_result.tv_usec);
This returns...
How to design a multi-user ajax web application to be concurrently safe
...amount continuous CPU and I/O work done in each of these (you want lots of sleep/idle time)
backend scaling
Forget database and filesystem, you will need some sort of shared memory based backend for the frequent polling (if the client does not poll directly then each running server process will)...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...格地说不是不可缺少的。毕竟，混合这两个为一个单独的函数是很容易的： zmq_send (s, "tcp://192.168.0.111:5555", data, sizeof (data), 0); 分离的理论基础即是技术的又是学术的。技术方面的争论包括： 当我们打算以异步的方式接...
Lock-free multi-threading is for real threading experts
...he it will run fast. A cache miss is really expensive, it puts the CPU to sleep for as many as 10 cycles if the data is not in the 1st cache, as many as 200 cycles if it isn't in the 2nd cache and it needs to be read from RAM.
Every CPU core has its own cache, they store their own "view" of RAM. ...
Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
...Cancelled())
return null;
SystemClock.sleep(500);
mProgress = i * 10;
publishProgress();
}
return null;
}
@Override
protected void onProgressUpdate(Void... unused)
{
...
How to modify a global variable within a function in bash?
...e while the _passback x is running.
You can see this yourself if you add a sleep 1; before printf or _passback.
_xcapture a d; echo then outputs x or a first, respectively.
The _passback x should not be part of _xcapture,
because this makes it difficult to reuse that recipe.
Also we have some unned...
Why are Subjects not recommended in .NET Reactive Extensions?
...So assume we have our own thread, we will probably have some sort of While/Sleep loop that we sit in to poll. When the check finds some messages we publish them. Well all of this sounds perfect for Observable.Create. Now we probably cant use a While loop as that wont allow us to ever return a Dispos...
通信连接组件 · App Inventor 2 中文网
...解码方法，便于图像文件的通信传输。此插件仅提供2个函数，使用非常方便，几乎没有学习成本。
属性
无
事件
无
方法
EncodeImage
DecodeImage
MqttClient 拓展
.aix 拓展及demo程序打包下载：
UrsAI2Paho.zip
MQTT是机器对机器(M...