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#include "module.h"
#include "async_commands.h"
static Pipe *me;
static CommandMutex *current_command = NULL;
static std::list<CommandMutex *> commands;
/* Mutex held by the core when it is processing. Used by threads to halt the core */
static Mutex main_mutex;
class AsynchCommandMutex : public CommandMutex
{
public:
AsynchCommandMutex() : CommandMutex()
{
commands.push_back(this);
current_command = this;
}
~AsynchCommandMutex()
{
std::list<CommandMutex *>::iterator it = std::find(commands.begin(), commands.end(), this);
if (it != commands.end())
commands.erase(it);
if (this == current_command)
current_command = NULL;
}
void Run()
{
User *u = this->source.u;
BotInfo *bi = this->source.owner;
if (!command->permission.empty() && !u->Account()->HasCommand(command->permission))
{
u->SendMessage(bi, LanguageString::ACCESS_DENIED);
Log(LOG_COMMAND, "denied", bi) << "Access denied for user " << u->GetMask() << " with command " << command;
}
else
{
CommandReturn ret = command->Execute(source, params);
if (ret == MOD_CONT)
{
FOREACH_MOD(I_OnPostCommand, OnPostCommand(source, command, params));
}
}
main_mutex.Unlock();
}
void Lock()
{
this->processing = true;
me->Notify();
this->mutex.Lock();
}
void Unlock()
{
this->processing = false;
main_mutex.Unlock();
}
};
class ModuleAsynchCommands : public Module, public Pipe, public AsynchCommandsService
{
public:
ModuleAsynchCommands(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator), Pipe(), AsynchCommandsService(this, "asynch_commands")
{
me = this;
this->SetPermanent(true);
main_mutex.Lock();
Implementation i[] = { I_OnPreCommand };
ModuleManager::Attach(i, this, 1);
ModuleManager::RegisterService(this);
}
EventReturn OnPreCommand(CommandSource &source, Command *command, const std::vector<Anope::string> ¶ms)
{
AsynchCommandMutex *cm = new AsynchCommandMutex();
try
{
cm->mutex.Lock();
cm->command = command;
cm->source = source;
cm->params = params;
// Give processing to the command thread
Log(LOG_DEBUG_2) << "Waiting for command thread " << cm->command->name << " from " << source.u->nick;
threadEngine.Start(cm);
main_mutex.Lock();
return EVENT_STOP;
}
catch (const CoreException &ex)
{
delete cm;
Log() << "Unable to thread for command: " << ex.GetReason();
}
return EVENT_CONTINUE;
}
void OnNotify()
{
for (std::list<CommandMutex *>::iterator it = commands.begin(), it_end = commands.end(); it != it_end; ++it)
{
CommandMutex *cm = *it;
// Thread engine will pick this up later
if (cm->GetExitState() || !cm->processing)
continue;
Log(LOG_DEBUG_2) << "Waiting for command thread " << cm->command->name << " from " << cm->source.u->nick;
current_command = cm;
// Unlock to give processing back to the command thread
cm->mutex.Unlock();
// Relock to regain processing once the command thread hangs for any reason
main_mutex.Lock();
current_command = NULL;
}
}
CommandMutex *CurrentCommand()
{
return current_command;
}
};
MODULE_INIT(ModuleAsynchCommands)
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