Sweden-Number/programs/explorer/hal.c

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/*
* HAL devices support
*
* Copyright 2006 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/time.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winuser.h"
#include "excpt.h"
#include "wine/library.h"
#include "wine/exception.h"
#include "wine/debug.h"
#include "explorer_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(explorer);
#ifdef SONAME_LIBHAL
#include <dbus/dbus.h>
#include <hal/libhal.h>
#define DBUS_FUNCS \
DO_FUNC(dbus_bus_get); \
DO_FUNC(dbus_connection_close); \
DO_FUNC(dbus_connection_read_write_dispatch); \
DO_FUNC(dbus_error_init); \
DO_FUNC(dbus_error_free); \
DO_FUNC(dbus_error_is_set)
#define HAL_FUNCS \
DO_FUNC(libhal_ctx_free); \
DO_FUNC(libhal_ctx_init); \
DO_FUNC(libhal_ctx_new); \
DO_FUNC(libhal_ctx_set_dbus_connection); \
DO_FUNC(libhal_ctx_set_device_added); \
DO_FUNC(libhal_ctx_set_device_property_modified); \
DO_FUNC(libhal_ctx_set_device_removed); \
DO_FUNC(libhal_ctx_shutdown); \
DO_FUNC(libhal_device_get_property_bool); \
DO_FUNC(libhal_device_get_property_string); \
DO_FUNC(libhal_device_add_property_watch); \
DO_FUNC(libhal_device_remove_property_watch); \
DO_FUNC(libhal_free_string); \
DO_FUNC(libhal_free_string_array); \
DO_FUNC(libhal_get_all_devices)
#define DO_FUNC(f) static typeof(f) * p_##f
DBUS_FUNCS;
HAL_FUNCS;
#undef DO_FUNC
static BOOL load_functions(void)
{
void *hal_handle;
char error[128];
/* Load libhal with RTLD_GLOBAL so that the dbus symbols are available.
* We can't load libdbus directly since libhal may have been built against a
* different version but with the same soname. Binary compatibility is for wimps. */
if (!(hal_handle = wine_dlopen(SONAME_LIBHAL, RTLD_NOW|RTLD_GLOBAL, error, sizeof(error))))
goto failed;
#define DO_FUNC(f) if (!(p_##f = wine_dlsym( RTLD_DEFAULT, #f, error, sizeof(error) ))) goto failed
DBUS_FUNCS;
#undef DO_FUNC
#define DO_FUNC(f) if (!(p_##f = wine_dlsym( hal_handle, #f, error, sizeof(error) ))) goto failed
HAL_FUNCS;
#undef DO_FUNC
return TRUE;
failed:
WINE_WARN( "failed to load HAL support: %s\n", error );
return FALSE;
}
static LONG WINAPI assert_fault(EXCEPTION_POINTERS *eptr)
{
if (eptr->ExceptionRecord->ExceptionCode == EXCEPTION_WINE_ASSERTION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
/* HAL callback for new device */
static void new_device( LibHalContext *ctx, const char *udi )
{
DBusError error;
char *parent = NULL;
char *mount_point = NULL;
char *device = NULL;
char *type = NULL;
p_dbus_error_init( &error );
if (!(device = p_libhal_device_get_property_string( ctx, udi, "block.device", &error )))
goto done;
if (!(mount_point = p_libhal_device_get_property_string( ctx, udi, "volume.mount_point", &error )))
goto done;
if (!(parent = p_libhal_device_get_property_string( ctx, udi, "info.parent", &error )))
goto done;
if (!p_libhal_device_get_property_bool( ctx, parent, "storage.removable", &error ))
goto done;
if (!(type = p_libhal_device_get_property_string( ctx, parent, "storage.drive_type", &error )))
p_dbus_error_free( &error ); /* ignore error */
add_dos_device( udi, device, mount_point, type );
/* add property watch for mount point */
p_libhal_device_add_property_watch( ctx, udi, &error );
done:
if (type) p_libhal_free_string( type );
if (parent) p_libhal_free_string( parent );
if (device) p_libhal_free_string( device );
if (mount_point) p_libhal_free_string( mount_point );
p_dbus_error_free( &error );
}
/* HAL callback for removed device */
static void removed_device( LibHalContext *ctx, const char *udi )
{
DBusError error;
WINE_TRACE( "removed %s\n", wine_dbgstr_a(udi) );
if (remove_dos_device( udi ))
{
p_dbus_error_init( &error );
p_libhal_device_remove_property_watch( ctx, udi, &error );
p_dbus_error_free( &error );
}
}
/* HAL callback for property changes */
static void property_modified (LibHalContext *ctx, const char *udi,
const char *key, dbus_bool_t is_removed, dbus_bool_t is_added)
{
WINE_TRACE( "udi %s key %s %s\n", wine_dbgstr_a(udi), wine_dbgstr_a(key),
is_added ? "added" : is_removed ? "removed" : "modified" );
if (!strcmp( key, "volume.mount_point" )) new_device( ctx, udi );
}
static DWORD WINAPI hal_thread( void *arg )
{
DBusError error;
DBusConnection *dbc;
LibHalContext *ctx;
int i, num;
char **list;
if (!(ctx = p_libhal_ctx_new())) return 1;
p_dbus_error_init( &error );
if (!(dbc = p_dbus_bus_get( DBUS_BUS_SYSTEM, &error )))
{
WINE_WARN( "failed to get system dbus connection: %s\n", error.message );
p_dbus_error_free( &error );
return 1;
}
p_libhal_ctx_set_dbus_connection( ctx, dbc );
p_libhal_ctx_set_device_added( ctx, new_device );
p_libhal_ctx_set_device_removed( ctx, removed_device );
p_libhal_ctx_set_device_property_modified( ctx, property_modified );
if (!p_libhal_ctx_init( ctx, &error ))
{
WINE_WARN( "HAL context init failed: %s\n", error.message );
p_dbus_error_free( &error );
return 1;
}
/* retrieve all existing devices */
if (!(list = p_libhal_get_all_devices( ctx, &num, &error ))) p_dbus_error_free( &error );
else
{
for (i = 0; i < num; i++) new_device( ctx, list[i] );
p_libhal_free_string_array( list );
}
__TRY
{
while (p_dbus_connection_read_write_dispatch( dbc, -1 )) /* nothing */ ;
}
__EXCEPT( assert_fault )
{
WINE_WARN( "dbus assertion failure, disabling HAL support\n" );
return 1;
}
__ENDTRY;
p_libhal_ctx_shutdown( ctx, &error );
p_dbus_error_free( &error ); /* just in case */
p_dbus_connection_close( dbc );
p_libhal_ctx_free( ctx );
return 0;
}
void initialize_hal(void)
{
HANDLE handle;
if (!load_functions()) return;
if (!(handle = CreateThread( NULL, 0, hal_thread, NULL, 0, NULL ))) return;
CloseHandle( handle );
}
#else /* SONAME_LIBHAL */
void initialize_hal(void)
{
WINE_TRACE( "Skipping, HAL support not compiled in\n" );
}
#endif /* SONAME_LIBHAL */