osd-contiki/platform/win32/loader/dll-loader.c

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Oliver Schmidt <ol.sc@web.de>
*
*/
#define WIN32_LEAN_AND_MEAN
#define _WIN32_WINNT 0x0501
#include <windows.h>
#include "contiki.h"
/*---------------------------------------------------------------------------*/
int
dll_loader_load(char *name, char *arg)
{
HMODULE handle;
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FARPROC p;
/* Load and link the program. */
handle = LoadLibrary(name);
if(handle == NULL) {
debug_printf("dll_loader_load: loading failed: %d\n", GetLastError());
return LOADER_ERR_OPEN;
}
/* Find the processes to be started from the loaded program. */
p = GetProcAddress(handle, "autostart_processes");
if(p == NULL) {
debug_printf("dll_loader_load: could not find symbol 'autostart_processes'\n");
return LOADER_ERR_READ;
}
/* Start the process. */
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debug_printf("Starting '%s'\n", (**(struct process ***)&p)->name);
process_start(**(struct process ***)&p, (void *)arg);
return LOADER_OK;
}
/*---------------------------------------------------------------------------*/
void
dll_loader_unload(void *addr)
{
/* Avoid Access Violation Exception due to unloading code still being executed. */
QueueUserAPC((PAPCFUNC)dll_loader_unload_dsc, GetCurrentThread(), (ULONG_PTR)addr);
}
/*---------------------------------------------------------------------------*/
struct dsc *
dll_loader_load_dsc(char *name)
{
HMODULE handle;
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FARPROC d;
char symbol[24];
handle = LoadLibrary(name);
if(handle == NULL) {
debug_printf("dll_loader_load_dsc: loading failed: %d\n", GetLastError());
return NULL;
}
strcpy(symbol, name);
*strchr(symbol, '.') = '_';
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d = GetProcAddress(handle, symbol);
if(d == NULL) {
debug_printf("dll_loader_load_dsc: could not find symbol '%s'\n", symbol);
return NULL;
}
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return *(struct dsc **)&d;
}
/*---------------------------------------------------------------------------*/
void __stdcall
dll_loader_unload_dsc(void *addr)
{
HMODULE handle;
GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, addr, &handle);
FreeLibrary(handle);
}
/*---------------------------------------------------------------------------*/