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Category: OS

Operating System (Operating System, referred to as OS) is a computer program that manages and controls computer hardware and software resources. It is the most basic system software that runs directly on the “bare metal”. Any other software must be supported by the operating system to run .

How to write a C function that is binding to open a file handle in RUST?

I have played with writing library bindings in Rust, and it’s not difficult. However, now, I’m stuck: I’m trying to write a binding for librsync, and it’s Some functions expect you to pass an open

October 17, 2021By Simo Os Theory Bind, file, function, handle, How to Write, need, open, RustLeave a Comment

From the single-chip microcomputer to the operating system 7 – In-depth understanding of the delay mechanism of Freertos

If you haven’t studied the source code of the operating system, it’s not considered learning the operating system.

Time management includes two aspects: system beat and task delay management.

October 17, 2021By Simo Os Theory delay, freertos, in-depth, Mechanism, Operating System, single chip, UnderstandingLeave a Comment

How to choose a server operating system

A server is needed to build a website. In the process of purchasing a server, in addition to the common CPU, memory, hard disk, bandwidth and other configurations, users also need to choose the ope

October 17, 2021By Simo Os Theory choose, How to, Operating System, serverLeave a Comment

Use Group_by to find the percentage in the subgroup and summarize

I am new to dplyr and tried to make the following conversion without luck. I have searched on the internet and I found an example of doing the same in ddply, but I want to use dplyr .

I have

October 17, 2021By Simo Mathematics Find, Group, incorporated, line, Medium, percentage, Sub, Summary, useLeave a Comment

Data Structure and Algorithm – Arrange

An array is a data structure composed of a collection of elements of the same type, and a contiguous memory is allocated for storage. The index of the element can be used to calculate the storage a

October 17, 2021By Simo Mathematics Algorithm, array, data, structureLeave a Comment

Two-forked tree, full binary tree, full binary tree

Definition Tree node (node): contains a data element and several branches pointing to the subtree;

Child node: node The root of the subtree of a point is called the child of the node;

P

October 17, 2021By Simo Mathematics binary tree, complete, full, Two-forkLeave a Comment

Operating system core principle -3. Process principle (medium): process schedule

PS: In a multi-process concurrent environment, although conceptually, there are multiple processes executing at the same time, but under a single CPU, at any time Only one process can be in the exe

October 17, 2021By Simo Os Theory Core, Medium, Operating System, principle, process, SchedulingLeave a Comment

Conversion of recursive functions to asynchronous CPS implementation (JavaScript)

This is my function.

function duplicate_step_through_highlighted (element_jq, target_jq, char_cb) {
console. log( element_jq);
var contents = element_jq.contents();
for (var i = 0; i }
}

October 17, 2021By Simo Mathematics asynchronous, conversion, CPS, function, Implementation, JavaScript, Recursive, willLeave a Comment

CRC test vector of crc16 (ccitt)

Does anyone know some CRC test vectors of CRC16-CCITT?

I don’t have a trusted CRC implementation. I either need to test someone’s implementation or test my own implementation. (For CRC32, I u

October 17, 2021By Simo Os Theory CCITT, CRC, CRC16, test, vectorLeave a Comment

The operating system is upgraded from Tizen 2.3.2.3 to Tizen 3.0.0.1, the signature error in Gear S3 is incorrect.

My Gear S3 is running on Tizen 2.3.2.3. Yesterday, I updated it to Tizen 3.0.0.1. Now, when I try to install the app from Tizen Studio 1.2, it The following error is displayed

“The applicatio

October 17, 2021By Simo Os Theory 2.3.2.3, 3.0.0.1, error, Gear, Operating System, S3, signature, Tizen, UpgradeLeave a Comment

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