schedule.h

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#pragma once
#include "utils/queue.h"
namespace Schedule {
//XXX: figure out a way to simplify this whole namespace
//I'm not satisfied with each schedulable deciding whether it wants to
//run by itself. That probably belongs into the registries instead.
//Then we could probably do away with the whole 'Schedulable' concept
//and just keep 'callable's or smth
struct Schedulable {
    virtual ~Schedulable(){}
    virtual bool schedule(uint32_t) { return true; }
    virtual void call()=0;
};
struct Registry {
    Buffer<Schedulable *> list = 20;
    ~Registry() {
        for (auto &entry: list) {
            delete entry;
        }
    }
};
}
 
struct Scheduler {
    // this is pointing to the actual callables in the registries
    // we do not own them
    Queue<Schedule::Schedulable*> q;
    bool schedule(uint32_t time, Schedule::Registry &reg) {
        for (auto &c: reg.list) {
            if (q.full()) return false;
            if (c->schedule(time)) q.push(c);
        }
        return true;
    }
    void run() {
        while (!q.empty()) {
            auto s = q.pop();
            s->call();
        }
    }
};