generic-library/ChaiScript
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Add shared objects that can be used by all threads at their root scope only

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This commit is contained in:
Jason Turner
2009-09-03 11:42:23 +00:00
parent a427d2c1a9
commit 4d42d6ff33
4 changed files with 70 additions and 24 deletions
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77
include/chaiscript/dispatchkit/dispatchkit.hpp
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@@ -13,6 +13,7 @@
#include <set>
#include <boost/shared_ptr.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/tuple/tuple.hpp>
#include <stdexcept>
#include <vector>
#include <iostream>
@@ -156,14 +157,14 @@ namespace chaiscript
public:
typedef std::map<std::string, chaiscript::Type_Info> Type_Name_Map;
typedef std::map<std::string, Boxed_Value> Scope;
typedef std::pair<std::map<std::string, Boxed_Value>, std::deque<Scope> > StackData;
typedef boost::tuples::tuple<std::map<std::string, Boxed_Value>, std::deque<Scope>, bool> StackData;
typedef boost::shared_ptr<StackData> Stack;
Dispatch_Engine()
: m_place_holder(boost::shared_ptr<Placeholder_Object>(new Placeholder_Object()))
{
StackData &stack = get_stack_data();
stack.second.push_back(Scope());
stack.get<1>().push_back(Scope());
}
/**
@@ -174,7 +175,7 @@ namespace chaiscript
validate_object_name(name);
StackData &stack = get_stack_data();
stack.first.erase(name);
stack.get<0>().erase(name);
return add_function(f, name);
}
@@ -195,13 +196,13 @@ namespace chaiscript
validate_object_name(name);
StackData &stack = get_stack_data();
for (int i = stack.second.size()-1; i >= 0; --i)
for (int i = stack.get<1>().size()-1; i >= 0; --i)
{
std::map<std::string, Boxed_Value>::const_iterator itr = (stack.second)[i].find(name);
if (itr != (stack.second)[i].end())
std::map<std::string, Boxed_Value>::const_iterator itr = (stack.get<1>())[i].find(name);
if (itr != (stack.get<1>())[i].end())
{
stack.first.erase(name);
(stack.second)[i][name] = Boxed_Value(obj);
stack.get<0>().erase(name);
(stack.get<1>())[i][name] = obj;
return;
}
}
@@ -216,8 +217,21 @@ namespace chaiscript
{
StackData &stack = get_stack_data();
validate_object_name(name);
stack.first.erase(name);
stack.second.back()[name] = Boxed_Value(obj);
stack.get<0>().erase(name);
stack.get<1>().back()[name] = obj;
}
/**
* Adds a new shared object, between all the threads
*/
void add_shared_object(const Boxed_Value &obj, const std::string &name)
{
StackData &stack = get_stack_data();
validate_object_name(name);
stack.get<0>().erase(name);
boost::unique_lock<boost::shared_mutex> l(m_shared_object_mutex);
m_shared_objects[name] = obj;
}
/**
@@ -226,7 +240,7 @@ namespace chaiscript
void new_scope()
{
StackData &stack = get_stack_data();
stack.second.push_back(Scope());
stack.get<1>().push_back(Scope());
}
/**
@@ -235,16 +249,16 @@ namespace chaiscript
void pop_scope()
{
StackData &stack = get_stack_data();
if (stack.second.size() > 1)
if (stack.get<1>().size() > 1)
{
Scope &scope(stack.second.back());
Scope &scope(stack.get<1>().back());
for (Scope::const_iterator itr = scope.begin();
itr != scope.end();
++itr)
{
stack.first.erase(itr->first);
stack.get<0>().erase(itr->first);
}
stack.second.pop_back();
stack.get<1>().pop_back();
} else {
throw std::range_error("Unable to pop global stack");
}
@@ -276,13 +290,14 @@ namespace chaiscript
Stack new_stack() const
{
Stack s(new Stack::element_type());
s->second.push_back(Scope());
s->get<1>().push_back(Scope());
s->get<2>() = false;
return s;
}
void sync_cache()
{
get_stack()->first.clear();
get_stack()->get<0>().clear();
boost::shared_lock<boost::shared_mutex> l(m_mutex);
get_function_cache() = m_functions;
}
@@ -294,30 +309,46 @@ namespace chaiscript
*/
Boxed_Value get_object(const std::string &name) const
{
// Is it a placeholder object?
if (name == "_")
{
return m_place_holder;
}
StackData &stack = get_stack_data();
std::map<std::string, Boxed_Value> &cache = stack.first;
std::map<std::string, Boxed_Value> &cache = stack.get<0>();
// Is it in the cache?
std::map<std::string, Boxed_Value>::const_iterator itr = cache.find(name);
if (itr != cache.end())
{
return itr->second;
}
for (int i = stack.second.size()-1; i >= 0; --i)
// Is it in the stack?
for (int i = stack.get<1>().size()-1; i >= 0; --i)
{
std::map<std::string, Boxed_Value>::const_iterator itr = (stack.second)[i].find(name);
if (itr != (stack.second)[i].end())
std::map<std::string, Boxed_Value>::const_iterator itr = (stack.get<1>())[i].find(name);
if (itr != (stack.get<1>())[i].end())
{
cache[name] = itr->second;
return itr->second;
}
}
// Are we in the 0th stack and should check the shared objects?
if (stack.get<2>())
{
boost::shared_lock<boost::shared_mutex> l(m_shared_object_mutex);
itr = m_shared_objects.find(name);
if (itr != m_shared_objects.end())
{
cache[name] = itr->second;
return itr->second;
}
}
// If all that failed, then check to see if it's a function
std::vector<std::pair<std::string, std::multimap<std::string, Proxy_Function >::mapped_type> > funcs = get_function(name);
if (funcs.empty())
@@ -451,6 +482,7 @@ namespace chaiscript
if (!m_thread_stack.get())
{
m_thread_stack.reset(new Stack_Holder(new_stack()));
m_thread_stack->stack->get<2>() = true;
}
}
@@ -495,6 +527,7 @@ namespace chaiscript
}
mutable boost::shared_mutex m_mutex;
mutable boost::shared_mutex m_shared_object_mutex;
struct Stack_Holder
{
@@ -511,6 +544,8 @@ namespace chaiscript
mutable boost::thread_specific_ptr<Stack_Holder> m_thread_stack;
std::multimap<std::string, Proxy_Function> m_functions;
std::map<std::string, Boxed_Value> m_shared_objects;
Type_Name_Map m_types;
Boxed_Value m_place_holder;