Structures to track state of features.

src/cpp/ripple/FeatureTable.cpp

@@ -0,0 +1,61 @@
+#include "FeatureTable.h"
+
+FeatureTable::FeatureState* FeatureTable::getCreateFeature(const uint256& feature, bool create)
+{ // call with the mutex held
+	featureMap_t::iterator it = mFeatureMap.find(feature);
+	if (it == mFeatureMap.end())
+	{
+		if (!create)
+			return NULL;
+		return &(mFeatureMap[feature]);
+	}
+	return &(it->second);
+}
+
+bool FeatureTable::vetoFeature(const uint256& feature)
+{
+	boost::mutex::scoped_lock sl(mMutex);
+	FeatureState *s = getCreateFeature(feature, true);
+	if (s->mVetoed)
+		return false;
+	s->mVetoed = true;
+	return true;
+}
+
+bool FeatureTable::unVetoFeature(const uint256& feature)
+{
+	boost::mutex::scoped_lock sl(mMutex);
+	FeatureState *s = getCreateFeature(feature, false);
+	if (!s || !s->mVetoed)
+		return false;
+	s->mVetoed = false;
+	return true;
+}
+
+bool FeatureTable::enableFeature(const uint256& feature)
+{
+	boost::mutex::scoped_lock sl(mMutex);
+	FeatureState *s = getCreateFeature(feature, true);
+	if (s->mEnabled)
+		return false;
+	s->mEnabled = true;
+	return true;
+}
+
+bool FeatureTable::disableFeature(const uint256& feature)
+{
+	boost::mutex::scoped_lock sl(mMutex);
+	FeatureState *s = getCreateFeature(feature, false);
+	if (!s || !s->mEnabled)
+		return false;
+	s->mEnabled = false;
+	return true;
+}
+
+bool FeatureTable::isFeatureEnabled(const uint256& feature)
+{
+	boost::mutex::scoped_lock sl(mMutex);
+	FeatureState *s = getCreateFeature(feature, false);
+	return s && s->mEnabled;
+}
+