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I am trying to create a timer app which have multiple countdown timer for different task. Issue, I am facing is that, if I start one timer, and press back button, timer stops. So I want, that timer to run till either it is being paused or timer ends and alerts the user or app is destroyed. Help me how can I do this using Flutter? Any Sample Code Will be Appreciated? Solution will be rewarded

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I would like to be able to robustly stop a video when the video arrives on some specified frames in order to do oral presentations based on videos made with Blender, Manim...

I'm aware of this question, but the problem is that the video does not stops exactly at the good frame. Sometimes it continues forward for one frame and when I force it to come back to the initial frame we see the video going backward, which is weird. Even worse, if the next frame is completely different (different background...) this will be very visible.

To illustrate my issues, I created a demo project here (just click "next" and see that when the video stops, sometimes it goes backward). The full code is here.

The important part of the code I'm using is:

In std::hint there's a spin_loop function with the following definition in its documentation:

Emits a machine instruction to signal the processor that it is running in a busy-wait spin-loop (“spin lock”).

Upon receiving the spin-loop signal the processor can optimize its behavior by, for example, saving power or switching hyper-threads.

Depending on the target architecture, this compiles to either:

• _mm_pause, A.K.A. the pause intrinsic on x86
• yield instruction on 32-bit arm
• ISB SY on 64-bit arm (aarch64)

That last one has got my head spinning a little bit (😉). I thought that ISB is a lengthy operation, which would mean that, if used within a spin lock, the thread lags a bit in trying to detect whether the lock is open again, but otherwise there's hardly any profit to it.

What are the advantages of using ISB SY instead of a NOP in a spin loop on aarch64?

I found a post describing how to recover an Ethereum wallet keystore by guessing a single password, however, it uses node synchronous code, and I'm trying to convert it into asynchronous code so that I can use multithreading using worker_threads.

run.js (snippet)

Is there a way to detect when the app has been minimized? Simply using WidgetsBindingObserver with the paused event doesn't work as it's indistinguishable from when the user turns off the screen / phone locks. Note, I need this to work for both android and ios.

A bit of context of what I'm doing. In the application, I'm running a timer. I want to stop this timer if the user minimizes the app (e.g. uses its phone for something else). If the user, however, turns off the screen/locks it, I want the timer to continue.

I am trying to use the video_player, but I am getting the below error. I have also added an MRE (minimum reproducible example).

I have used an emulated Pixel 4, an emulated Pixel 4 XL, and an emulator Pixel 5 with the Android Studio Beta, but none of them worked.

The below error was when I was using a Pixel 4 XL, but the error was the same with all of them.

Error:

This only applies to Visual Studio 2022. I had uninstalled VS2019 and Preview where F# worked absolutely fine (F# 5.0). I am using VS2022 to use F# 6.0 and do not want to go back to F# 5.0.

The issue is specific to F#. I also use C# and I have no issues running the latest C# under VS2022.

There are near continual DevEnv processes running consuming anywhere from 1 to 4 of my CPU's 4 Hyperthreads. I have switched off all experimental options I can find in F# settings.

Sometimes there are 2 or more background processes running , sometimes paused and sometimes none - there appears to be no correlation between this and the background CPU consumption

Sometimes I have a pop up Dialog about waiting to complete an editor process or a compile process.

When devenev.exe is consuming CPU cycles under the properties I see there is always one clr.dllCoUnInitializeEE+0x6790 that is the culprit. I though this was meant to be a short-lived process? Sometimes there are two or three of these consuming most of a HyperThread (There are identical others but with very low or no CPU consumption). The stack on the guilty thread is as follows:

I have the following code:

I'm planning to move away from Docker to Podman. I use docker-compose a lot so am planning to switch to podman-compose as well.

However I'm stuck at the simplest of podman examples, I can't seem to mount a volume onto my container? Obviously I'm doing something wrong however I cant figure out what it is.

My source file definitely exists on my (hardware) host (so not the podman machine). but I keep getting the error 'no such file or directory'.

Funny thing is if I manually create the same file locally on the podman machine (podman machine ssh --> touch /tmp/test.txt) it works perfectly fine.

Question is;

• should I (manually?) mount all my local files onto the Fedora VM (podman machine) so that in turn this Fedora mount can be used in my actual container? and if so, how do I do this?
• The podman run cmd below should work and there is something else I'm doing wrong?