code. compile. run. debug. share.
#include <future>
#include <mutex>
#include <chrono>
#include <iostream>
// using namespace std; <== dont do this
// mutex mu; avoid global variables.
class Object
{
public:
Object() :
m_var{ 1 }
{
}
~Object()
{
}
void do_something()
{
using namespace std::chrono_literals;
for(std::size_t n = 0; n < 30; ++n)
{
// extra scope to reduce time of the lock
{
std::scoped_lock<std::mutex> lock{ m_mtx };
m_var++;
std::cout << ".";
}
std::this_thread::sleep_for(150ms);
}
}
private:
std::mutex m_mtx;
char m_var;
};
int main()
{
Object object;
// extra scope to manage lifecycle of future
{
// use a lambda function to start the member function of object
auto future = std::async(std::launch::async, [&] {object.do_something(); });
std::cout << "do something started\n";
// destructor of future will synchronize with end of thread;
}
std::cout << "\n work done\n";
// safe to go out of scope now and destroy the object
return 0;
}
Compiling Program...
Standard Input:
Interactive Console
Text
Program is not being debugged. Click "Debug" button to start program in debug mode.
| # | Function | File:Line |
|---|
| Variable | Value |
|---|
| Register | Value |
|---|
| Expression | Value |
|---|
| # | Description |
|---|