Implementing a Thread-Safe Singleton in C++

A singleton ensures a class has only one instance. In multithreaded applications, making it thread-safe is crucial. Using mutexes helps synchronize access to the singleton instance. Here’s how you can implement it:

“`cpp
#include
#include
using namespace std;
class Singleton {
public:
static Singleton& getInstance() {
static Singleton instance;
return instance;
}
private:
Singleton() {} // Private constructor
};
int main() {
Singleton& s1 = Singleton::getInstance();
return 0;
}
“`

In this code, `getInstance` returns the singleton instance. This ensures only one instance is created safely. Thread safety is essential in concurrent programming.