Binary semaphore P/V operations are encapsulated into dynamic/static libraries and tested separately.
P, V operation
PV operation is related to signal processing, P means pass, V means release.
Ftok function, not to understand its role first to say why it is used, shared memory, message queue, semaphore they are three to find an intermediate medium for communication, this medium is many. It's how to distinguish, just like the ...
Posted by richarro1234 on Wed, 15 May 2019 11:54:58 +0200
CoinCap API Query Mainstream Exchange Transaction Basic Data Block Chain Data Development Practice
Introduction: CoinCap is a useful tool for querying real-time pricing and marketing activities for more than 1,000 encrypted currencies.By collecting exchange data from thousands of markets, we can provide transparent and accurate data on asset prices and availability.This paper summarizes the basic operation and introduction of Co ...
Posted by dynamicallystatic on Sat, 11 May 2019 20:54:06 +0200
A Glance at the [APUE] Process
Basic concepts
Program: Executable file stored in disk file
Processes: Instances of program execution
Cmd: ps ，top
Process ID: Each process has a unique process ID identified by a non-negative integer
0 is the dispatch process, 1 is the init process, (most UNIX systems) 2 is the page daemon
/*In addition to the process ...
Posted by JOWP on Tue, 07 May 2019 21:05:03 +0200