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/** (c) Nullsoft, Inc. C O N F I D E N T I A L
** Filename:
** Project:
** Description:
** Author: Ben Allison benski@nullsoft.com
** Created:
**/
#include "main.h"
#include "SysCallbacks.h"
#include <api/syscb/callbacks/syscb.h>
#include "../nu/AutoLock.h"
using namespace Nullsoft::Utility;
SysCallbacks::SysCallbacks()
{
reentry=0;
inCallback=false;
}
//note: it's OK to add in the middle of an issueCallback
//because new callbacks go at the end of the list
//and the lockguard prevents list corruption
int SysCallbacks::syscb_registerCallback(SysCallback *cb, void *param)
{
AutoLock lock(callbackGuard LOCKNAME("SysCallbacks::syscb_registerCallback"));
int event_type = cb->getEventType();
//CallbackList *&callbacks = callback_map[event_type];
//if (!callbacks)
// callbacks = new CallbackList;
//callbacks->push_back(cb);
EventMap::iterator find = callback_map.find(event_type);
CallbackList* callbacks = 0;
if (find != callback_map.end())
{
callbacks = find->second;
}
else
{
callbacks = new CallbackList();
callback_map.insert({ event_type, callbacks });
}
if (callbacks)
{
callbacks->push_back(cb);
}
return 1;
}
int SysCallbacks::syscb_deregisterCallback(SysCallback *cb)
{
AutoLock lock(callbackGuard LOCKNAME("SysCallbacks::syscb_deregisterCallback"));
if (inCallback)
deleteMeAfterCallbacks.push_back(cb);
else
{
int event_type = cb->getEventType();
EventMap::iterator find = callback_map.find(event_type);
if (find != callback_map.end())
{
CallbackList *callbacks = find->second;
if (callbacks)
{
//callbacks->eraseAll(cb);
auto it = callbacks->begin();
while ( it != callbacks->end())
{
if (*it != cb)
{
it++;
continue;
}
it = callbacks->erase(it);
}
}
}
}
return 1;
}
int SysCallbacks::syscb_issueCallback(int event_type, int msg, intptr_t param1 , intptr_t param2)
{
AutoLock lock(callbackGuard LOCKNAME("SysCallbacks::syscb_issueCallback"));
reentry++;
inCallback=true;
EventMap::iterator find = callback_map.find(event_type);
if (find != callback_map.end())
{
CallbackList *callbacks = find->second;
if (callbacks)
{
for (size_t i=0;i<callbacks->size();i++)
{
SysCallback *callback = callbacks->at(i);
//if (!deleteMeAfterCallbacks.contains(callback))
// callback->notify(msg, param1, param2);
bool found = false;
for (auto obj : deleteMeAfterCallbacks)
{
if (obj == callback)
{
found = true;
break;
}
}
if (!found)
callback->notify(msg, param1, param2);
}
}
}
inCallback=false;
reentry--;
if (reentry==0)
{
for ( SysCallback *l_sys_call_back : deleteMeAfterCallbacks )
{
for (EventMap::iterator itr=callback_map.begin(); itr != callback_map.end(); itr++)
{
CallbackList *callbacks = itr->second;
if (callbacks)
{
//callbacks->eraseAll(cb);
auto it = callbacks->begin();
while (it != callbacks->end())
{
if (*it != l_sys_call_back )
{
it++;
continue;
}
it = callbacks->erase(it);
}
}
}
}
deleteMeAfterCallbacks.clear();
}
return 1;
}
SysCallback *SysCallbacks::syscb_enum(int event_type, size_t n)
{
AutoLock lock(callbackGuard LOCKNAME("SysCallbacks::syscb_enum"));
// TODO: maybe check !deleteMeAfterCallbacks.contains(callbacks[i])
if (event_type)
{
EventMap::iterator find = callback_map.find(event_type);
if (find != callback_map.end())
{
CallbackList *callbacks = find->second;
if (callbacks)
{
if (n <= callbacks->size())
{
SysCallback *callback = callbacks->at(n);
if (callback)
callback->AddRef(); // benski> don't be fooled. most objects don't actually support reference counting
return callback;
}
}
}
}
else
{
// enumerates ALL syscallbacks
for (EventMap::iterator itr=callback_map.begin(); itr != callback_map.end(); itr++)
{
CallbackList *callbacks = itr->second;
if (callbacks)
{
if (n >= callbacks->size())
{
n-=callbacks->size();
}
else
{
SysCallback *callback = callbacks->at(n);
if (callback)
callback->AddRef(); // benski> don't be fooled. most objects don't actually support reference counting
return callback;
}
}
}
}
return 0;
}
#define CBCLASS SysCallbacks
START_DISPATCH;
CB(API_SYSCB_SYSCB_REGISTERCALLBACK, syscb_registerCallback)
CB(API_SYSCB_SYSCB_DEREGISTERCALLBACK, syscb_deregisterCallback)
CB(API_SYSCB_SYSCB_ISSUECALLBACK, syscb_issueCallback)
CB(API_SYSCB_SYSCB_ENUM, syscb_enum)
END_DISPATCH;
#undef CBCLASS
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