when watching Modern operating system, there are the following: conditional variables (unlike semaphores) will not exist in memory . If you send a semaphore to a semaphore that no thread is waiting for, the signal will be lost I would like to ask y...
on Linux, while executing sem_timewait (), will the current thread sleep, choose another thread to execute, or block in place until it times out? after the timeout, if the lock has not been acquired, do you sleep or block the current process? ...
spin locks are easy to understand, which is constantly polling, so what is the mechanism of mutexes? What are the drawbacks of this mechanism that make it better to use spin locks in some situations? ...
I have not come into contact with the background before. Will it be very difficult to learn node directly, and there are few documents related to node? is it necessary to learn php, to understand some programming ideas in the background before learning n...
problem description how do you implement such a layout when you encounter such a layout in your development? the environmental background of the problems and what methods you have tried try to use postion to find some redundancy in css code. Is...
Promise function app(num,data){ } if you want to execute yourself again after a successful call var data=[...] data.length=3 app(0) .then(function(res){ console.log(res) return app(1) }) .then(function(res){ console.log(res) retu...
ask a question of choosing the best among different combinations of various modules. assume that a main program is essentially a process, first A, then B, then C. But A, B, and C all have a variety of implementations. For example, A can be A1, or A2, ...
< H2 > problem description < H2 > now I m going to take a screenshot of the website . but I found that the screenshot shows a picture of the unexecuted page script JS. I have seen a lot of documents and netizens answers, but my search ability is...