void Fiber::resume() {
DCHECK_EQ(state_, AWAITING);
state_ = READY_TO_RUN;
if (fiberManager_.observer_) {
fiberManager_.observer_->runnable(reinterpret_cast<uintptr_t>(this));
}
if (LIKELY(threadId_ == localThreadId())) {
fiberManager_.readyFibers_.push_back(*this);
fiberManager_.ensureLoopScheduled();
} else {
fiberManager_.remoteReadyInsert(this);
}
}
void Fiber::fiberFunc() {
#ifdef FOLLY_SANITIZE_ADDRESS
fiberManager_.registerFinishSwitchStackWithAsan(
nullptr, &asanMainStackBase_, &asanMainStackSize_);
#endif
while (true) {
DCHECK_EQ(state_, NOT_STARTED);
threadId_ = localThreadId();
state_ = RUNNING;
try {
if (resultFunc_) {
DCHECK(finallyFunc_);
DCHECK(!func_);
resultFunc_();
} else {
DCHECK(func_);
func_();
}
} catch (...) {
fiberManager_.exceptionCallback_(
std::current_exception(), "running Fiber func_/resultFunc_");
}
if (UNLIKELY(recordStackUsed_)) {
fiberManager_.stackHighWatermark_ = std::max(
fiberManager_.stackHighWatermark_, nonMagicInBytes(fcontext_));
VLOG(3) << "Max stack usage: " << fiberManager_.stackHighWatermark_;
CHECK(
fiberManager_.stackHighWatermark_ <
fiberManager_.options_.stackSize - 64)
<< "Fiber stack overflow";
}
state_ = INVALID;
auto context = fiberManager_.deactivateFiber(this);
DCHECK_EQ(reinterpret_cast<Fiber*>(context), this);
}
}
