mirror of
https://github.com/wpilibsuite/allwpilib
synced 2026-06-22 01:11:42 +00:00
90 lines
3.6 KiB
C++
90 lines
3.6 KiB
C++
/*----------------------------------------------------------------------------*/
|
|
/* Copyright (c) 2015-2019 FIRST. All Rights Reserved. */
|
|
/* Open Source Software - may be modified and shared by FRC teams. The code */
|
|
/* must be accompanied by the FIRST BSD license file in the root directory of */
|
|
/* the project. */
|
|
/*----------------------------------------------------------------------------*/
|
|
|
|
#include "EntryNotifier.h"
|
|
|
|
#include "Log.h"
|
|
|
|
using namespace nt;
|
|
|
|
EntryNotifier::EntryNotifier(int inst, wpi::Logger& logger)
|
|
: m_inst(inst), m_logger(logger) {
|
|
m_local_notifiers = false;
|
|
}
|
|
|
|
void EntryNotifier::Start() { DoStart(m_inst); }
|
|
|
|
bool EntryNotifier::local_notifiers() const { return m_local_notifiers; }
|
|
|
|
bool impl::EntryNotifierThread::Matches(const EntryListenerData& listener,
|
|
const EntryNotification& data) {
|
|
if (!data.value) return false;
|
|
|
|
// Flags must be within requested flag set for this listener.
|
|
// Because assign messages can result in both a value and flags update,
|
|
// we handle that case specially.
|
|
unsigned int listen_flags =
|
|
listener.flags & ~(NT_NOTIFY_IMMEDIATE | NT_NOTIFY_LOCAL);
|
|
unsigned int flags = data.flags & ~(NT_NOTIFY_IMMEDIATE | NT_NOTIFY_LOCAL);
|
|
unsigned int assign_both = NT_NOTIFY_UPDATE | NT_NOTIFY_FLAGS;
|
|
if ((flags & assign_both) == assign_both) {
|
|
if ((listen_flags & assign_both) == 0) return false;
|
|
listen_flags &= ~assign_both;
|
|
flags &= ~assign_both;
|
|
}
|
|
if ((flags & ~listen_flags) != 0) return false;
|
|
|
|
// must match local id or prefix
|
|
if (listener.entry != 0 && data.entry != listener.entry) return false;
|
|
if (listener.entry == 0 &&
|
|
!wpi::StringRef(data.name).startswith(listener.prefix))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
unsigned int EntryNotifier::Add(
|
|
std::function<void(const EntryNotification& event)> callback,
|
|
StringRef prefix, unsigned int flags) {
|
|
if ((flags & NT_NOTIFY_LOCAL) != 0) m_local_notifiers = true;
|
|
return DoAdd(callback, prefix, flags);
|
|
}
|
|
|
|
unsigned int EntryNotifier::Add(
|
|
std::function<void(const EntryNotification& event)> callback,
|
|
unsigned int local_id, unsigned int flags) {
|
|
if ((flags & NT_NOTIFY_LOCAL) != 0) m_local_notifiers = true;
|
|
return DoAdd(callback, Handle(m_inst, local_id, Handle::kEntry), flags);
|
|
}
|
|
|
|
unsigned int EntryNotifier::AddPolled(unsigned int poller_uid,
|
|
wpi::StringRef prefix,
|
|
unsigned int flags) {
|
|
if ((flags & NT_NOTIFY_LOCAL) != 0) m_local_notifiers = true;
|
|
return DoAdd(poller_uid, prefix, flags);
|
|
}
|
|
|
|
unsigned int EntryNotifier::AddPolled(unsigned int poller_uid,
|
|
unsigned int local_id,
|
|
unsigned int flags) {
|
|
if ((flags & NT_NOTIFY_LOCAL) != 0) m_local_notifiers = true;
|
|
return DoAdd(poller_uid, Handle(m_inst, local_id, Handle::kEntry), flags);
|
|
}
|
|
|
|
void EntryNotifier::NotifyEntry(unsigned int local_id, StringRef name,
|
|
std::shared_ptr<Value> value,
|
|
unsigned int flags,
|
|
unsigned int only_listener) {
|
|
// optimization: don't generate needless local queue entries if we have
|
|
// no local listeners (as this is a common case on the server side)
|
|
if ((flags & NT_NOTIFY_LOCAL) != 0 && !m_local_notifiers) return;
|
|
DEBUG0("notifying '" << name << "' (local=" << local_id
|
|
<< "), flags=" << flags);
|
|
Send(only_listener, 0, Handle(m_inst, local_id, Handle::kEntry).handle(),
|
|
name, value, flags);
|
|
}
|