Notice that we overflow the count // to 1 here, not zero, as otherwise the // reader below could get a division by zero _sum[ch] = 0; _count[ch] = 1; } _sum[ch] += (v >> 3); } bit_set(PORTC, 4); // Disable Chip Select (PIN PC4) } void ADC::init(AP_Pe...
On the other hand,geti2()effectively accesses the value ofi2from "main" memory. Avolatilevariable is not allowed to have a local copy of a variable that is different from the value currently held in "main" memory. Effectively, a variable declaredvolatilemust have it's data synchronized acr...
For example, if you declare a primitive variable as volatile, the compiler is not permitted to cache it in a register -- a common optimization that would be disastrous if that variable were shared among multiple threads. So the general rule is, if you have variables of primitive type that ...
there are times when its use is required for correct operation of c/c+ programs. in general, whenever a variable may be altered asynchronously, such as by a signal handler or mapped hardware, the variable must be declared to be volatile.since volatile prevents re-using values in registers, ...
There are times when its use is required for correct operation of C/C++ programs. In general, whenever a variable may be altered asynchronously, such as by a signal handler or mapped hardware, the variable must be declared to be volatile. Since volatile prevents re-using values in registers,...
C programmers have often taken volatile to mean that the variable could be changed outside of the current thread of execution; as a result,they are sometimes tempted to use it in kernel code when shared data structures are being used. In other words, they have been known totreat volatile ...
在rust 中创建空向量 - C 编程语言代码示例 我的名字是-C编程语言代码示例 代码示例2 C's volatile keyword is a qualifier that is applied to a variable when it is declared. It tells the compiler that the value of the variable may change at any time--without any action being taken by the...
3.volatile- marked by erratic changeableness in affections or attachments; "fickle friends"; "a flirt's volatile affections" fickle inconstant- likely to change frequently often without apparent or cogent reason; variable; "inconstant affections"; "an inconstant lover"; "swear not by...the incons...
variable See all Synonyms & Antonyms in Thesaurus Examples ofvolatilein a Sentence AdjectiveI am beginning to hear investors say that the best way to beat thisvolatilemarket is by trading—anxiously moving in and out of securities as the market ebbs and flows. In my view there is no surer ...
I don't think there's a better person to answer this thanEric Lippert(emphasis in the original): In C#, "volatile" means not only "make sure that the compiler and the jitter do not perform any code reordering or register caching optimizations on this variable". It also means "tell the...