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/*
* plugin.c
*
* This file is a part of NSIS.
*
* Copyright (C) 1999-2018 Nullsoft and Contributors
*
* Licensed under the zlib/libpng license (the "License");
* you may not use this file except in compliance with the License.
*
* Licence details can be found in the file COPYING.
*
* This software is provided 'as-is', without any express or implied
* warranty.
*/
#include "plugin.h"
#ifdef NSIS_CONFIG_PLUGIN_SUPPORT
typedef struct _loaded_plugin
{
struct _loaded_plugin* next;
NSISPLUGINCALLBACK proc;
HMODULE dll;
}
loaded_plugin;
static loaded_plugin* g_plugins = 0; // not thread safe!
void NSISCALL Plugins_SendMsgToAllPlugins(int msg)
{
loaded_plugin* p;
for (p = g_plugins; p; p = p->next)
{
p->proc(msg);
}
}
void NSISCALL Plugins_UnloadAll()
{
loaded_plugin* p = g_plugins;
Plugins_SendMsgToAllPlugins(NSPIM_UNLOAD);
while (p)
{
loaded_plugin* oldp = p;
p = oldp->next;
FreeLibrary(oldp->dll);
GlobalFree(oldp);
}
g_plugins = NULL;
}
BOOL NSISCALL Plugins_CanUnload(HANDLE pluginHandle)
{
loaded_plugin* p;
for (p = g_plugins; p; p = p->next)
{
if (p->dll == pluginHandle)
{
return FALSE;
}
}
return TRUE;
}
int NSISCALL RegisterPluginCallback(HMODULE pluginHandle, NSISPLUGINCALLBACK proc)
{
loaded_plugin* p;
if (!Plugins_CanUnload(pluginHandle))
{
// already registered
return 1;
}
p = (loaded_plugin*) GlobalAlloc(GPTR, sizeof(loaded_plugin));
if (p)
{
p->proc = proc;
p->dll = pluginHandle;
p->next = g_plugins;
g_plugins = p;
return 0;
}
return -1;
}
#endif /* #ifdef NSIS_CONFIG_PLUGIN_SUPPORT */
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