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(svn r25898) -Codechange: Add second timestamp for 'restricted links' to all edges.

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This commit is contained in:
fonsinchen
2013-10-22 16:13:28 +00:00
parent ec2d36a4a4
commit 29e987f3fc
5 changed files with 104 additions and 31 deletions
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58
src/linkgraph/linkgraph.cpp
View File

@@ -39,7 +39,8 @@ inline void LinkGraph::BaseEdge::Init(uint distance)
this->distance = distance;
this->capacity = 0;
this->usage = 0;
this->last_update = INVALID_DATE;
this->last_unrestricted_update = INVALID_DATE;
this->last_restricted_update = INVALID_DATE;
this->next_edge = INVALID_NODE;
}
@@ -56,7 +57,8 @@ void LinkGraph::ShiftDates(int interval)
if (source.last_update != INVALID_DATE) source.last_update += interval;
for (NodeID node2 = 0; node2 < this->Size(); ++node2) {
BaseEdge &edge = this->edges[node1][node2];
if (edge.last_update != INVALID_DATE) edge.last_update += interval;
if (edge.last_unrestricted_update != INVALID_DATE) edge.last_unrestricted_update += interval;
if (edge.last_restricted_update != INVALID_DATE) edge.last_restricted_update += interval;
}
}
}
@@ -178,9 +180,11 @@ NodeID LinkGraph::AddNode(const Station *st)
}
/**
* Fill an edge with values from a link.
* Fill an edge with values from a link. If usage < capacity set the usage,
* otherwise set the restricted or unrestricted update timestamp.
* @param to Destination node of the link.
* @param capacity Capacity of the link.
* @param usage Usage to be added or REFRESH_UNRESTRICTED or REFRESH_RESTRICTED.
*/
void LinkGraph::Node::AddEdge(NodeID to, uint capacity, uint usage)
{
@@ -188,17 +192,32 @@ void LinkGraph::Node::AddEdge(NodeID to, uint capacity, uint usage)
BaseEdge &edge = this->edges[to];
BaseEdge &first = this->edges[this->index];
edge.capacity = capacity;
edge.usage = usage == UINT_MAX ? 0 : usage;
edge.next_edge = first.next_edge;
first.next_edge = to;
edge.last_update = _date;
switch (usage) {
case REFRESH_UNRESTRICTED:
edge.last_unrestricted_update = _date;
break;
case REFRESH_RESTRICTED:
edge.last_restricted_update = _date;
break;
default:
edge.usage = usage;
break;
}
}
/**
* Creates an edge if none exists yet or updates an existing edge.
* @param to Target node.
* @param capacity Capacity of the link.
* @param usage Usage to be added or REFRESH_UNRESTRICTED or REFRESH_RESTRICTED.
*/
void LinkGraph::Node::UpdateEdge(NodeID to, uint capacity, uint usage)
{
assert(capacity > 0);
assert(usage <= capacity || usage == UINT_MAX);
if (this->edges[to].last_update == INVALID_DATE) {
assert(usage <= capacity || usage == REFRESH_RESTRICTED || usage == REFRESH_UNRESTRICTED);
if (this->edges[to].capacity == 0) {
this->AddEdge(to, capacity, usage);
} else {
(*this)[to].Update(capacity, usage);
@@ -214,7 +233,8 @@ void LinkGraph::Node::RemoveEdge(NodeID to)
if (this->index == to) return;
BaseEdge &edge = this->edges[to];
edge.capacity = 0;
edge.last_update = INVALID_DATE;
edge.last_unrestricted_update = INVALID_DATE;
edge.last_restricted_update = INVALID_DATE;
edge.usage = 0;
NodeID prev = this->index;
@@ -233,24 +253,34 @@ void LinkGraph::Node::RemoveEdge(NodeID to)
}
/**
* Create a new edge or update an existing one. If usage is UINT_MAX refresh
* the edge to have at least the given capacity, otherwise add the capacity.
* Create a new edge or update an existing one. If usage is REFRESH_UNRESTRICTED
* or REFRESH_RESTRICTED refresh the edge to have at least the given capacity
* and also update the respective update timestamp, otherwise add the capacity.
* @param from Start node of the edge.
* @param to End node of the edge.
* @param capacity Capacity to be added/updated.
* @param usage Usage to be added or UINT_MAX.
* @param usage Usage to be added or REFRESH_UNRESTRICTED or REFRESH_RESTRICTED.
*/
void LinkGraph::Edge::Update(uint capacity, uint usage)
{
assert(this->edge.capacity > 0);
if (usage == UINT_MAX) {
if (usage > capacity) {
this->edge.capacity = max(this->edge.capacity, capacity);
switch (usage) {
case REFRESH_UNRESTRICTED:
this->edge.last_unrestricted_update = _date;
break;
case REFRESH_RESTRICTED:
this->edge.last_restricted_update = _date;
break;
default:
NOT_REACHED();
break;
}
} else {
assert(capacity >= usage);
this->edge.capacity += capacity;
this->edge.usage += usage;
}
this->edge.last_update = _date;
}
/**

45
src/linkgraph/linkgraph.h
View File

@@ -40,6 +40,22 @@ extern LinkGraphPool _link_graph_pool;
class LinkGraph : public LinkGraphPool::PoolItem<&_link_graph_pool> {
public:
/**
* Special modes for updating links. 'Restricted' means that vehicles with
* 'no loading' orders are serving the link. If a link is only served by
* such vehicles it's 'fully restricted'. This means the link can be used
* by cargo arriving in such vehicles, but not by cargo generated or
* transferring at the source station of the link. In order to find out
* about this condition we keep two update timestamps in each link, one for
* the restricted and one for the unrestricted part of it. If either one
* times out while the other is still valid the link becomes fully
* restricted or fully unrestricted, respectively.
*/
enum UpdateMode {
REFRESH_RESTRICTED = UINT_MAX - 1, ///< Refresh restricted link.
REFRESH_UNRESTRICTED = UINT_MAX ///< Refresh unrestricted link.
};
/**
* Node of the link graph. contains all relevant information from the associated
* station. It's copied so that the link graph job can work on its own data set
@@ -60,11 +76,12 @@ public:
* the column as next_edge.
*/
struct BaseEdge {
uint distance; ///< Length of the link.
uint capacity; ///< Capacity of the link.
uint usage; ///< Usage of the link.
Date last_update; ///< When the link was last updated.
NodeID next_edge; ///< Destination of next valid edge starting at the same source node.
uint distance; ///< Length of the link.
uint capacity; ///< Capacity of the link.
uint usage; ///< Usage of the link.
Date last_unrestricted_update; ///< When the unrestricted part of the link was last updated.
Date last_restricted_update; ///< When the restricted part of the link was last updated.
NodeID next_edge; ///< Destination of next valid edge starting at the same source node.
void Init(uint distance = 0);
};
@@ -104,10 +121,22 @@ public:
uint Distance() const { return this->edge.distance; }
/**
* Get edge's last update.
* Get the date of the last update to the edge's unrestricted capacity.
* @return Last update.
*/
Date LastUpdate() const { return this->edge.last_update; }
Date LastUnrestrictedUpdate() const { return this->edge.last_unrestricted_update; }
/**
* Get the date of the last update to the edge's restricted capacity.
* @return Last update.
*/
Date LastRestrictedUpdate() const { return this->edge.last_restricted_update; }
/**
* Get the date of the last update to any part of the edge's capacity.
* @return Last update.
*/
Date LastUpdate() const { return max(this->edge.last_unrestricted_update, this->edge.last_restricted_update); }
};
/**
@@ -285,6 +314,8 @@ public:
*/
Edge(BaseEdge &edge) : EdgeWrapper<BaseEdge>(edge) {}
void Update(uint capacity, uint usage);
void Restrict() { this->edge.last_unrestricted_update = INVALID_DATE; }
void Release() { this->edge.last_restricted_update = INVALID_DATE; }
};
/**