void c_ExternalThreadEventWaitHandle::process() {
assert(getState() == STATE_WAITING);
if (isInContext()) {
unregisterFromContext();
}
// clean up once event is processed
auto exit_guard = folly::makeGuard([&] { destroyEvent(); });
Cell result;
try {
m_event->unserialize(result);
} catch (const Object& exception) {
assert(exception->instanceof(SystemLib::s_ExceptionClass));
auto const parentChain = getFirstParent();
setState(STATE_FAILED);
tvWriteObject(exception.get(), &m_resultOrException);
c_BlockableWaitHandle::UnblockChain(parentChain);
auto session = AsioSession::Get();
if (UNLIKELY(session->hasOnExternalThreadEventFailCallback())) {
session->onExternalThreadEventFail(this, exception);
}
return;
} catch (...) {
auto const parentChain = getFirstParent();
setState(STATE_FAILED);
tvWriteObject(AsioSession::Get()->getAbruptInterruptException(),
&m_resultOrException);
c_BlockableWaitHandle::UnblockChain(parentChain);
throw;
}
assert(cellIsPlausible(result));
auto const parentChain = getFirstParent();
setState(STATE_SUCCEEDED);
cellCopy(result, m_resultOrException);
c_BlockableWaitHandle::UnblockChain(parentChain);
auto session = AsioSession::Get();
if (UNLIKELY(session->hasOnExternalThreadEventSuccessCallback())) {
session->onExternalThreadEventSuccess(this, tvAsCVarRef(&result));
}
}
bool c_ExternalThreadEventWaitHandle::cancel(const Object& exception) {
if (getState() != STATE_WAITING) {
return false; // already finished
}
if (!m_event->cancel()) {
return false;
}
// canceled; the processing thread will take care of cleanup
if (isInContext()) {
unregisterFromContext();
}
// clean up once we finish canceling event
auto exit_guard = folly::makeGuard([&] {
// unregister Sweepable
m_sweepable.unregister();
m_privData.reset();
// drop ownership by pending event (see initialize())
decRefObj(this);
});
auto parentChain = getParentChain();
setState(STATE_FAILED);
tvWriteObject(exception.get(), &m_resultOrException);
parentChain.unblock();
auto session = AsioSession::Get();
if (UNLIKELY(session->hasOnExternalThreadEventFail())) {
session->onExternalThreadEventFail(this, exception, 0);
}
return true;
}
void c_ExternalThreadEventWaitHandle::process() {
assertx(getState() == STATE_WAITING);
if (isInContext()) {
unregisterFromContext();
}
// Store the finish time of the underlying IO operation
// So we can pass it in the finish callbacks
// clean up once event is processed
auto exit_guard = folly::makeGuard([&] { destroyEvent(); });
Cell result;
try {
try {
m_event->unserialize(result);
} catch (ExtendedException& exception) {
exception.recomputeBacktraceFromWH(this);
throw exception;
}
} catch (const Object& exception) {
assertx(exception->instanceof(SystemLib::s_ThrowableClass));
throwable_recompute_backtrace_from_wh(exception.get(), this);
auto parentChain = getParentChain();
setState(STATE_FAILED);
tvWriteObject(exception.get(), &m_resultOrException);
parentChain.unblock();
auto session = AsioSession::Get();
if (UNLIKELY(session->hasOnExternalThreadEventFail())) {
session->onExternalThreadEventFail(
this,
exception,
std::chrono::duration_cast<std::chrono::nanoseconds>(
m_event->getFinishTime().time_since_epoch()
).count()
);
}
return;
} catch (...) {
auto parentChain = getParentChain();
setState(STATE_FAILED);
tvWriteObject(AsioSession::Get()->getAbruptInterruptException(),
&m_resultOrException);
parentChain.unblock();
throw;
}
assertx(cellIsPlausible(result));
auto parentChain = getParentChain();
setState(STATE_SUCCEEDED);
cellCopy(result, m_resultOrException);
parentChain.unblock();
auto session = AsioSession::Get();
if (UNLIKELY(session->hasOnExternalThreadEventSuccess())) {
session->onExternalThreadEventSuccess(
this,
tvAsCVarRef(&result),
std::chrono::duration_cast<std::chrono::nanoseconds>(
m_event->getFinishTime().time_since_epoch()
).count()
);
}
}
