bank_account_1.cpp
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#include <asio/execution.hpp>
#include <asio/static_thread_pool.hpp>
#include <iostream>
using asio::static_thread_pool;
namespace execution = asio::execution;
// Traditional active object pattern.
// Member functions do not block.
class bank_account
{
int balance_ = 0;
mutable static_thread_pool pool_{1};
public:
void deposit(int amount)
{
execution::execute(
pool_.executor(),
[this, amount]
{
balance_ += amount;
});
}
void withdraw(int amount)
{
execution::execute(
pool_.executor(),
[this, amount]
{
if (balance_ >= amount)
balance_ -= amount;
});
}
void print_balance() const
{
execution::execute(
pool_.executor(),
[this]
{
std::cout << "balance = " << balance_ << "\n";
});
}
~bank_account()
{
pool_.wait();
}
};
int main()
{
bank_account acct;
acct.deposit(20);
acct.withdraw(10);
acct.print_balance();
}