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Implement local notification.

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The default behavior is to only notify remote changes, but for some
applications (e.g. GUI's) it's advantageous to know about local
changes as well.

This is (slightly) optimized in that local changes only result in
additional resources being consumed if (any) local listeners have been
created.
This commit is contained in:
Peter Johnson
2015-09-23 00:56:08 -07:00
parent 75358e6c45
commit 424bf51a7b
14 changed files with 173 additions and 42 deletions
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29
src/networktables/NetworkTable.cpp
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@@ -97,11 +97,16 @@ NetworkTable::~NetworkTable() {
}
void NetworkTable::AddTableListener(ITableListener* listener) {
AddTableListener(listener, false);
AddTableListener(listener, false, false);
}
void NetworkTable::AddTableListener(ITableListener* listener,
bool immediateNotify) {
AddTableListener(listener, immediateNotify, false);
}
void NetworkTable::AddTableListener(ITableListener* listener,
bool immediateNotify, bool localNotify) {
std::lock_guard<std::mutex> lock(m_mutex);
llvm::SmallString<128> path(m_path);
path += PATH_SEPARATOR_CHAR;
@@ -114,13 +119,18 @@ void NetworkTable::AddTableListener(ITableListener* listener,
if (relative_key.find(PATH_SEPARATOR_CHAR) != StringRef::npos) return;
listener->ValueChanged(this, relative_key, value, is_new);
},
immediateNotify);
immediateNotify,
localNotify);
m_listeners.emplace_back(listener, id);
}
void NetworkTable::AddTableListener(StringRef key,
ITableListener* listener,
void NetworkTable::AddTableListener(StringRef key, ITableListener* listener,
bool immediateNotify) {
AddTableListener(key, listener, immediateNotify, false);
}
void NetworkTable::AddTableListener(StringRef key, ITableListener* listener,
bool immediateNotify, bool localNotify) {
std::lock_guard<std::mutex> lock(m_mutex);
llvm::SmallString<128> path(m_path);
path += PATH_SEPARATOR_CHAR;
@@ -133,11 +143,17 @@ void NetworkTable::AddTableListener(StringRef key,
if (name != path) return;
listener->ValueChanged(this, name.substr(prefix_len), value, is_new);
},
immediateNotify);
immediateNotify,
localNotify);
m_listeners.emplace_back(listener, id);
}
void NetworkTable::AddSubTableListener(ITableListener* listener) {
AddSubTableListener(listener, false);
}
void NetworkTable::AddSubTableListener(ITableListener* listener,
bool localNotify) {
std::lock_guard<std::mutex> lock(m_mutex);
llvm::SmallString<128> path(m_path);
path += PATH_SEPARATOR_CHAR;
@@ -160,7 +176,8 @@ void NetworkTable::AddSubTableListener(ITableListener* listener) {
notified_tables->insert(std::make_pair(sub_table_key, '\0'));
listener->ValueChanged(this, sub_table_key, nullptr, true);
},
true);
true,
localNotify);
m_listeners.emplace_back(listener, id);
}