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-rw-r--r--src/Bindings/ManualBindings.cpp32
-rw-r--r--src/Bindings/PluginLua.cpp77
-rw-r--r--src/Bindings/PluginLua.h84
3 files changed, 134 insertions, 59 deletions
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index 035be55ae..cdc01ae09 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -1299,23 +1299,27 @@ tolua_lerror:
class cLuaWorldTask :
- public cWorld::cTask
+ public cWorld::cTask,
+ public cPluginLua::cResettable
{
public:
cLuaWorldTask(cPluginLua & a_Plugin, int a_FnRef) :
- m_Plugin(a_Plugin),
+ cPluginLua::cResettable(a_Plugin),
m_FnRef(a_FnRef)
{
}
protected:
- cPluginLua & m_Plugin;
int m_FnRef;
// cWorld::cTask overrides:
virtual void Run(cWorld & a_World) override
{
- m_Plugin.Call(m_FnRef, &a_World);
+ cCSLock Lock(m_CSPlugin);
+ if (m_Plugin != nullptr)
+ {
+ m_Plugin->Call(m_FnRef, &a_World);
+ }
}
} ;
@@ -1354,7 +1358,9 @@ static int tolua_cWorld_QueueTask(lua_State * tolua_S)
return lua_do_error(tolua_S, "Error in function call '#funcname#': Could not get function reference of parameter #1");
}
- self->QueueTask(make_unique<cLuaWorldTask>(*Plugin, FnRef));
+ auto task = std::make_shared<cLuaWorldTask>(*Plugin, FnRef);
+ Plugin->AddResettable(task);
+ self->QueueTask(task);
return 0;
}
@@ -1363,23 +1369,27 @@ static int tolua_cWorld_QueueTask(lua_State * tolua_S)
class cLuaScheduledWorldTask :
- public cWorld::cTask
+ public cWorld::cTask,
+ public cPluginLua::cResettable
{
public:
cLuaScheduledWorldTask(cPluginLua & a_Plugin, int a_FnRef) :
- m_Plugin(a_Plugin),
+ cPluginLua::cResettable(a_Plugin),
m_FnRef(a_FnRef)
{
}
protected:
- cPluginLua & m_Plugin;
int m_FnRef;
// cWorld::cTask overrides:
virtual void Run(cWorld & a_World) override
{
- m_Plugin.Call(m_FnRef, &a_World);
+ cCSLock Lock(m_CSPlugin);
+ if (m_Plugin != nullptr)
+ {
+ m_Plugin->Call(m_FnRef, &a_World);
+ }
}
};
@@ -1425,7 +1435,9 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
int DelayTicks = (int)tolua_tonumber(tolua_S, 2, 0);
- World->ScheduleTask(DelayTicks, new cLuaScheduledWorldTask(*Plugin, FnRef));
+ auto task = std::make_shared<cLuaScheduledWorldTask>(*Plugin, FnRef);
+ Plugin->AddResettable(task);
+ World->ScheduleTask(DelayTicks, task);
return 0;
}
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index 263d1f005..d133c091a 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -6,10 +6,11 @@
#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#ifdef __APPLE__
-#define LUA_USE_MACOSX
+ #define LUA_USE_MACOSX
#else
-#define LUA_USE_POSIX
+ #define LUA_USE_POSIX
#endif
+
#include "PluginLua.h"
#include "../CommandOutput.h"
#include "PluginManager.h"
@@ -52,24 +53,35 @@ cPluginLua::~cPluginLua()
void cPluginLua::Close(void)
{
- if (m_LuaState.IsValid())
+ cCSLock Lock(m_CriticalSection);
+
+ // If already closed, bail out:
+ if (!m_LuaState.IsValid())
{
- // Release all the references in the hook map:
- for (cHookMap::iterator itrH = m_HookMap.begin(), endH = m_HookMap.end(); itrH != endH; ++itrH)
- {
- for (cLuaRefs::iterator itrR = itrH->second.begin(), endR = itrH->second.end(); itrR != endR; ++itrR)
- {
- delete *itrR;
- } // for itrR - itrH->second[]
- } // for itrH - m_HookMap[]
- m_HookMap.clear();
-
- m_LuaState.Close();
+ ASSERT(m_Resettables.empty());
+ ASSERT(m_HookMap.empty());
+ return;
}
- else
+
+ // Notify and remove all m_Resettables:
+ for (auto resettable: m_Resettables)
{
- ASSERT(m_HookMap.empty());
+ resettable->Reset();
}
+ m_Resettables.clear();
+
+ // Release all the references in the hook map:
+ for (cHookMap::iterator itrH = m_HookMap.begin(), endH = m_HookMap.end(); itrH != endH; ++itrH)
+ {
+ for (cLuaRefs::iterator itrR = itrH->second.begin(), endR = itrH->second.end(); itrR != endR; ++itrR)
+ {
+ delete *itrR;
+ } // for itrR - itrH->second[]
+ } // for itrH - m_HookMap[]
+ m_HookMap.clear();
+
+ // Close the Lua engine:
+ m_LuaState.Close();
}
@@ -1709,6 +1721,16 @@ int cPluginLua::CallFunctionFromForeignState(
+void cPluginLua::AddResettable(cPluginLua::cResettablePtr a_Resettable)
+{
+ cCSLock Lock(m_CriticalSection);
+ m_Resettables.push_back(a_Resettable);
+}
+
+
+
+
+
AString cPluginLua::HandleWebRequest(const HTTPRequest * a_Request)
{
cCSLock Lock(m_CriticalSection);
@@ -1826,3 +1848,26 @@ void cPluginLua::CallbackWindowSlotChanged(int a_FnRef, cWindow & a_Window, int
+
+////////////////////////////////////////////////////////////////////////////////
+// cPluginLua::cResettable:
+
+cPluginLua::cResettable::cResettable(cPluginLua & a_Plugin):
+ m_Plugin(&a_Plugin),
+ m_CSPlugin(a_Plugin.m_CriticalSection)
+{
+}
+
+
+
+
+
+void cPluginLua::cResettable::Reset(void)
+{
+ cCSLock Lock(m_CSPlugin);
+ m_Plugin = nullptr;
+}
+
+
+
+
diff --git a/src/Bindings/PluginLua.h b/src/Bindings/PluginLua.h
index 4f3529fc9..e358693bc 100644
--- a/src/Bindings/PluginLua.h
+++ b/src/Bindings/PluginLua.h
@@ -59,6 +59,38 @@ public:
/** RAII lock for m_Plugin.m_CriticalSection */
cCSLock m_Lock;
} ;
+
+
+
+ /** A base class that represents something related to a plugin
+ The plugin can reset this class so that the instance can continue to exist but will not engage the (possibly non-existent) plugin anymore.
+ This is used for scheduled tasks etc., so that they can be queued and reset when the plugin is terminated, without removing them from the queue. */
+ class cResettable
+ {
+ public:
+ /** Creates a new instance bound to the specified plugin. */
+ cResettable(cPluginLua & a_Plugin);
+
+ // Force a virtual destructor in descendants:
+ virtual ~cResettable() {}
+
+ /** Resets the plugin instance stored within.
+ The instance will continue to exist, but should not call into the plugin anymore. */
+ virtual void Reset(void);
+
+ protected:
+ /** The plugin that this instance references.
+ If nullptr, the plugin has already unloaded and the instance should bail out any processing.
+ Protected against multithreaded access by m_CSPlugin. */
+ cPluginLua * m_Plugin;
+
+ /** The mutex protecting m_Plugin against multithreaded access.
+ Actually points to m_Plugin's internal m_CriticalSection in order to prevent deadlocks. */
+ cCriticalSection & m_CSPlugin;
+ };
+
+ typedef SharedPtr<cResettable> cResettablePtr;
+ typedef std::vector<cResettablePtr> cResettablePtrs;
cPluginLua(const AString & a_PluginDirectory);
@@ -187,42 +219,16 @@ public:
int a_ParamEnd
);
- // The following templates allow calls to arbitrary Lua functions residing in the plugin:
-
- /** Call a Lua function with 0 args */
- template <typename FnT> bool Call(FnT a_Fn)
- {
- cCSLock Lock(m_CriticalSection);
- return m_LuaState.Call(a_Fn);
- }
-
- /** Call a Lua function with 1 arg */
- template <typename FnT, typename ArgT0> bool Call(FnT a_Fn, ArgT0 a_Arg0)
- {
- cCSLock Lock(m_CriticalSection);
- return m_LuaState.Call(a_Fn, a_Arg0);
- }
-
- /** Call a Lua function with 2 args */
- template <typename FnT, typename ArgT0, typename ArgT1> bool Call(FnT a_Fn, ArgT0 a_Arg0, ArgT1 a_Arg1)
+ /** Call a Lua function residing in the plugin. */
+ template <typename FnT, typename... Args>
+ bool Call(FnT a_Fn, Args && ... a_Args)
{
cCSLock Lock(m_CriticalSection);
- return m_LuaState.Call(a_Fn, a_Arg0, a_Arg1);
+ return m_LuaState.Call(a_Fn, a_Args...);
}
- /** Call a Lua function with 3 args */
- template <typename FnT, typename ArgT0, typename ArgT1, typename ArgT2> bool Call(FnT a_Fn, ArgT0 a_Arg0, ArgT1 a_Arg1, ArgT2 a_Arg2)
- {
- cCSLock Lock(m_CriticalSection);
- return m_LuaState.Call(a_Fn, a_Arg0, a_Arg1, a_Arg2);
- }
-
- /** Call a Lua function with 4 args */
- template <typename FnT, typename ArgT0, typename ArgT1, typename ArgT2, typename ArgT3> bool Call(FnT a_Fn, ArgT0 a_Arg0, ArgT1 a_Arg1, ArgT2 a_Arg2, ArgT3 a_Arg3)
- {
- cCSLock Lock(m_CriticalSection);
- return m_LuaState.Call(a_Fn, a_Arg0, a_Arg1, a_Arg2, a_Arg3);
- }
+ /** Adds the specified cResettable instance to m_Resettables, so that it is notified when the plugin is being closed. */
+ void AddResettable(cResettablePtr a_Resettable);
protected:
/** Maps command name into Lua function reference */
@@ -234,15 +240,27 @@ protected:
/** Maps hook types into arrays of Lua function references to call for each hook type */
typedef std::map<int, cLuaRefs> cHookMap;
+
+ /** The mutex protecting m_LuaState and each of the m_Resettables[] against multithreaded use. */
cCriticalSection m_CriticalSection;
+
+ /** The plugin's Lua state. */
cLuaState m_LuaState;
+ /** Objects that need notification when the plugin is about to be unloaded. */
+ cResettablePtrs m_Resettables;
+
+ /** In-game commands that the plugin has registered. */
CommandMap m_Commands;
+
+ /** Console commands that the plugin has registered. */
CommandMap m_ConsoleCommands;
+ /** Hooks that the plugin has registered. */
cHookMap m_HookMap;
- /** Releases all Lua references and closes the LuaState */
+
+ /** Releases all Lua references, notifies and removes all m_Resettables[] and closes the m_LuaState. */
void Close(void);
} ; // tolua_export
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 12:28:43 +0200