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ntoskrnl.exe: Introduce common kernel object allocator and use it for driver object. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2019-02-26 13:39:11 +01:00 committed by Alexandre Julliard
parent 38eebddc1d
commit bb94d94bb0
2 changed files with 47 additions and 11 deletions
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57
dlls/ntoskrnl.exe/ntoskrnl.c
View File

@ -98,11 +98,10 @@ static DWORD client_pid;
struct wine_driver
{
struct wine_rb_entry entry;
DRIVER_OBJECT driver_obj;
DRIVER_EXTENSION driver_extension;
SERVICE_STATUS_HANDLE service_handle;
struct wine_rb_entry entry;
};
struct device_interface
@ -252,6 +251,38 @@ static HANDLE get_device_manager(void)
}
struct object_header
{
LONG ref;
POBJECT_TYPE type;
};
static void free_kernel_object( void *obj )
{
struct object_header *header = (struct object_header *)obj - 1;
HeapFree( GetProcessHeap(), 0, header );
}
void *alloc_kernel_object( POBJECT_TYPE type, SIZE_T size, LONG ref )
{
struct object_header *header;
if (!(header = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*header) + size)) )
return NULL;
header->ref = ref;
header->type = type;
return header + 1;
}
/* FIXME: Use ObDereferenceObject instead. */
static void dereference_kernel_object( void *obj )
{
struct object_header *header = (struct object_header*)obj - 1;
if (!InterlockedDecrement( &header->ref ) && header->type->release)
header->type->release( obj );
}
static const WCHAR file_type_name[] = {'F','i','l','e',0};
static struct _OBJECT_TYPE file_type = {
@ -1100,11 +1131,20 @@ static NTSTATUS WINAPI unhandled_irp( DEVICE_OBJECT *device, IRP *irp )
}
static void free_driver_object( void *obj )
{
struct wine_driver *driver = obj;
RtlFreeUnicodeString( &driver->driver_obj.DriverName );
RtlFreeUnicodeString( &driver->driver_obj.DriverExtension->ServiceKeyName );
free_kernel_object( driver );
}
static const WCHAR driver_type_name[] = {'D','r','i','v','e','r',0};
static struct _OBJECT_TYPE driver_type =
{
driver_type_name,
free_driver_object
};
POBJECT_TYPE IoDriverObjectType = &driver_type;
@ -1121,13 +1161,12 @@ NTSTATUS WINAPI IoCreateDriver( UNICODE_STRING *name, PDRIVER_INITIALIZE init )
TRACE("(%s, %p)\n", debugstr_us(name), init);
if (!(driver = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof(*driver) )))
if (!(driver = alloc_kernel_object( IoDriverObjectType, sizeof(*driver), 1 )))
return STATUS_NO_MEMORY;
if ((status = RtlDuplicateUnicodeString( 1, name, &driver->driver_obj.DriverName )))
{
RtlFreeHeap( GetProcessHeap(), 0, driver );
free_kernel_object( driver );
return status;
}
@ -1142,9 +1181,7 @@ NTSTATUS WINAPI IoCreateDriver( UNICODE_STRING *name, PDRIVER_INITIALIZE init )
status = driver->driver_obj.DriverInit( &driver->driver_obj, &driver->driver_extension.ServiceKeyName );
if (status)
{
RtlFreeUnicodeString( &driver->driver_obj.DriverName );
RtlFreeUnicodeString( &driver->driver_extension.ServiceKeyName );
RtlFreeHeap( GetProcessHeap(), 0, driver );
dereference_kernel_object( driver );
return status;
}
@ -1173,9 +1210,7 @@ void WINAPI IoDeleteDriver( DRIVER_OBJECT *driver_object )
wine_rb_remove_key( &wine_drivers, &driver_object->DriverName );
LeaveCriticalSection( &drivers_cs );
RtlFreeUnicodeString( &driver_object->DriverName );
RtlFreeUnicodeString( &driver_object->DriverExtension->ServiceKeyName );
RtlFreeHeap( GetProcessHeap(), 0, CONTAINING_RECORD( driver_object, struct wine_driver, driver_obj ) );
dereference_kernel_object( driver_object );
}

1
dlls/ntoskrnl.exe/ntoskrnl_private.h
View File

@ -23,6 +23,7 @@
struct _OBJECT_TYPE {
const WCHAR *name; /* object type name used for type validation */
void (*release)(void*); /* called when the last reference is released */
};
#ifdef __i386__