feat(Worklets): Worklet Runtime C++ scheduling API

[tjzel]

Summary

Inspired by #8425

I'm adding scheduling APIs for the WorkletRuntime class resembling the ones in TypeScript API. I preserved previous scheduling APIs as deprecated.

Synchronous call methods

• runSync
  • accepting jsi::Function or std::shared_ptr<SerializableWorklet>
  • mimicking runOn...Sync TS API etc.
  • always invokes via callGuard
  • perfectly forwards function arguments
  • returns jsi::Value

// example
jsi::Value foo(
    jsi::Function function,
    std::shared_ptr<WorkletRuntime> runtime,
    double value) {
  return runtime->runSync(function, value);
}

---

• runSync (2)
  • accepting a functor that takes jsi::Runtime & as an argument, i.e. std::function<TReturn(jsi::Runtime &)>
  • mimicking runOn...Sync TS API etc.
  • doesn't use callGuard - the user have to do it themselves
  • doesn't take function arguments - the user already passes a lambda so they can put them into closure
  • returns the type of the lambda

// example
double bar(std::shared_ptr<WorkletRuntime> runtime, double value) {
  return runtime->runSync([value](jsi::Runtime &rt) -> double {
    auto math = rt.global().getPropertyAsObject(rt, "Math");
    auto pow = math.getPropertyAsFunction(rt, "pow");
    return pow.call(rt, value).asNumber();
  });
}

---

• runSyncSerialized
  • syntax sugar that does the same as runSync but returns extracted Serializable from jsi::Value
  • worklet or jsi::Function passed must serialize on its own in JS with createSerializable
  • doesn't accept std::function<TReturn(jsi::Runtime &)> as TReturn might not be serializable

// example
std::shared_ptr<Serializable> baz(
    std::shared_ptr<WorkletRuntime> runtime,
    jsi::Function function,
    double value) {
  return runtime->runSyncSerialized(function, jsi::Value(value));
}

---

Asynchronous call methods

• schedule
  • mimicking scheduleOn... TS API etc.
  • accepts jsi::Function, std::shared_ptr<SerializableWorklet>, std::function<void()> or std::function<void(jsi::Runtime&)>
  • requires the Worklet Runtime to have the AsyncQueue set
  • doesn't take arguments
    • For jsi::Function and std::shared_ptr<SerializableWorklet> we don't want to be responsible for how arguments are stored in the lambda passed to AsyncQueue
    • For std::function the user can store the arguments in their lambda
  • doesn't return a value

// example
void baq(
    std::shared_ptr<WorkletRuntime> runtime,
    std::shared_ptr<SerializableWorklet> worklet) {
  runtime->schedule(worklet);
}

---

runAsync function possibly returning promises (futures) is yet to be considered for implementation in future PRs

Deprecated methods

• runGuarded - identical to runSync, replaced with runSync
• runAsyncGuarded - identical to schedule, replaced with schedule
• (1) executeSync - this function was a bit complicated. It took two runtimes, executed a worklet on the target runtime then serialized data back to the caller runtime. While it's a handy syntax sugar I think it shouldn't be a method of a runtime but rather some utility API. Replaced with runSyncSerialized and manual extraction on the caller runtime.
• (2) executeSync - identical to runSync replaced with runSync

Test plan

⭐ BokehExample ⭐