Leetcode-1115. 交替打印 FooBar [medium] (多线程)
最编程
2024-10-17 12:15:47
...
class FooBar {
private:
int n;
sem_t fooSem;
sem_t barSem;
public:
FooBar(int n) {
this->n = n;
sem_init(&fooSem, 0, 1);
sem_init(&barSem, 0, 0);
}
~FooBar() {
sem_destroy(&fooSem);
sem_destroy(&barSem);
}
void foo(function<void()> printFoo) {
for (int i = 0; i < n; i++) {
sem_wait(&fooSem);
// printFoo() outputs "foo". Do not change or remove this line.
printFoo();
sem_post(&barSem);
}
}
void bar(function<void()> printBar) {
for (int i = 0; i < n; i++) {
sem_wait(&barSem);
// printBar() outputs "bar". Do not change or remove this line.
printBar();
sem_post(&fooSem);
}
}
};