How to pass function as parameter to parameter?


Java Prophet

So I'm using callbacks in GNUTLS.

I want to pass my function handleSNIto the function, but I also want to pass some other important parameters (to it when calling SNI).

I can execute them outside the function of the global variable, but this is not thread safe.

is it possible? If not, how can this be done?

cookies

GnuTLS supports user-defined parameters in callbacks. For the push-pull function, you can set it via . You pass a pointer to the struct containing the data and use it in the callback.gnutls_transport_set_ptr

On a more general level, the answer is: if your library doesn't support user-defined parameters, you're out of luck. In C, there is no way to spoof extra parameters. If you find such a library, do yourself a favor and don't use it. If there are no other options, you can use thread-safe containers or thread-local storage. But it's really ugly.

Related


How to pass function as parameter to parameter?

Java Prophet So I'm using callbacks in GNUTLS. I want to pass my function handleSNIto the function, but I also want to pass some other important parameters (to it when calling SNI). I can execute them outside the function of the global variable, but this is no

How to pass function as parameter to parameter?

Java Prophet So I'm using callbacks in GNUTLS. I want to pass my function handleSNIto the function, but I also want to pass some other important parameters (to it when calling SNI). I can execute them outside the function of the global variable, but this is no

How to pass function as parameter

epinephrine I have a function that takes a vector and sums all elements. (def rec (fn [numbers acc] (if (empty? numbers) acc (recur (rest numbers) (+ acc (first numbers)))))) (prn (rec [1 2 3] 0)) However, instead of calling the function "+"

How to pass function as parameter

epinephrine I have a function that takes a vector and sums all elements. (def rec (fn [numbers acc] (if (empty? numbers) acc (recur (rest numbers) (+ acc (first numbers)))))) (prn (rec [1 2 3] 0)) However, instead of calling the function "+"

How to pass function as parameter

epinephrine I have a function that takes a vector and sums all elements. (def rec (fn [numbers acc] (if (empty? numbers) acc (recur (rest numbers) (+ acc (first numbers)))))) (prn (rec [1 2 3] 0)) However, instead of calling the function "+"

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass cstring as function parameter/parameter

black tail I have a small program that prints out the upper case of each letter of a word, but when I compile it I get an error, signed/unsigned mismatch, because I pass cstrings normally stringin that program . How do I pass it correctly so I can still use it

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass parameter name as parameter to function

early pd I understand that the title probably doesn't make any sense. I searched everywhere but couldn't find an answer. What I'm trying to do is create a function that will take the parameter names of another function, a vector, and then proceed to call the f

How to pass a class as a function parameter

xypher: I know this question has been asked before, but I don't quite understand/the answer is not helpful, so as I start learning Java I'd like some help in this regard. I want to create a function that calculates an instance of a class and returns me a numbe

How to pass function as parameter in Java?

Jason: In Java, how do I pass a function as an argument to another function? jk。: Java 8 and above If your class or interface has only one abstract method (sometimes called a SAM type ), use a Java 8+ lambda expression like: public interface MyInterface {

How to pass a type as a function parameter

Isaac I have the following type checking code to verify that userInput is one of the defined values const variantColorValues = ['primary', 'black', 'green', 'red', 'white'] as const; export type VariantColor = (typeof variantColorValues)[number]; function isO

How to pass a struct as a parameter to a function

Mirabeau: I have several configuration JSON files, each with a specific struc type Currently, I create a function for each file/struct name: type ConfigOne struct { App string `json:"app"` Web string `json:"web"` Archive string `json:"archi

How to pass function as parameter in Java

you must: I have a matrix class and I want to create a function called map in this class that looks like this public void map(T fn) { //do something } The idea behind the function is to take as parameter fn which can be any method and apply this me

How to pass struct as parameter to function

Nagri: what should I do? I am trying to pass a structas a parameter to Go. func handleEntityProperties(w http.ResponseWriter, r *http.Request) { const sliceSize = 100 var entityProperties struct { Instance string `json:"instance"` Entit

How to pass Backbone function as parameter

Dan Dan I have a requirement to pass a function in a backbone view into another function in the same view. I used the following method which works perfectly for global functions. However, when it comes to Backbone view instances, it doesn't work. I believe the

How to pass function as parameter in Java?

Jason: In Java, how do I pass a function as an argument to another function? jk。: Java 8 and above If your class or interface has only one abstract method (sometimes called a SAM type ), use a Java 8+ lambda expression like: public interface MyInterface {

How to pass member function as parameter?

bad user C++ syntax is killing me. I tried to pass this+ pointer to member function: so I did the following: template <void(Myclass::*func)()> static void Myfunction(Myclass* theThis) { theThis->*func(); } This is good. But now I want to pass from this fu

How to pass a tuple as a function parameter

AJcodez Got a function with three parameters. f(a, b, c) = # do stuff There is another function that returns a tuple. g() = (1, 2, 3) How to pass a tuple as a function parameter? f(g()) # ERROR Guillermo Garza Using Nanashi's example, the hint is that you m

How to pass a struct as a parameter to a function?

mess How to pass struct to use as parameter in golang? There is my code: package main import ( "fmt" ) type MyClass struct { Name string } func test(class interface{}) { fmt.Println(class.Name) } func main() { test(MyClass{Name: "Jhon"}) }

How to pass function as context parameter?

Truman 1 I want to pass a delegate in the context and try to do something like this: func process(value: Float) -> Float { return value * 999.9 } ----------- self.pushControllerWithName("someController", context: [ "func": SomeUtils

How to pass template as parameter to function

Goodfellas 95 // Example program #include <iostream> #include <string> #include <array> using namespace std; int returnSize(template z <class T, size_t>) { /*if(arr.size() ==0) return 1; else return 2; */ return 1; } int main() {

How to pass a struct as a parameter to a function

Mirabeau: I have several configuration JSON files, each with a specific struc type Currently, I create a function for each file/struct name: type ConfigOne struct { App string `json:"app"` Web string `json:"web"` Archive string `json:"archi