164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/*
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* ntoskrnl.exe implementation
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*
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* Copyright (C) 2007 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "ddk/wdm.h"
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#include "wine/unicode.h"
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#include "wine/server.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ntoskrnl);
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static inline LPCSTR debugstr_us( const UNICODE_STRING *us )
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{
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if (!us) return "<null>";
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return debugstr_wn( us->Buffer, us->Length / sizeof(WCHAR) );
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}
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static HANDLE get_device_manager(void)
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{
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static HANDLE device_manager;
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HANDLE handle = 0, ret = device_manager;
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if (!ret)
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{
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SERVER_START_REQ( create_device_manager )
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{
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req->access = SYNCHRONIZE;
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req->attributes = 0;
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if (!wine_server_call( req )) handle = reply->handle;
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}
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SERVER_END_REQ;
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if (!handle)
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{
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ERR( "failed to create the device manager\n" );
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return 0;
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}
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if (!(ret = InterlockedCompareExchangePointer( &device_manager, handle, 0 )))
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ret = handle;
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else
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NtClose( handle ); /* somebody beat us to it */
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}
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return ret;
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}
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/***********************************************************************
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* IoCreateDevice (NTOSKRNL.EXE.@)
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*/
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NTSTATUS WINAPI IoCreateDevice( DRIVER_OBJECT *driver, ULONG ext_size,
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UNICODE_STRING *name, DEVICE_TYPE type,
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ULONG characteristics, BOOLEAN exclusive,
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DEVICE_OBJECT **ret_device )
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{
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NTSTATUS status;
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DEVICE_OBJECT *device;
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HANDLE handle = 0;
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HANDLE manager = get_device_manager();
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TRACE( "(%p, %u, %s, %u, %x, %u, %p)\n",
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driver, ext_size, debugstr_us(name), type, characteristics, exclusive, ret_device );
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if (!(device = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*device) + ext_size )))
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return STATUS_NO_MEMORY;
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SERVER_START_REQ( create_device )
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{
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req->access = 0;
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req->attributes = 0;
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req->rootdir = 0;
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req->manager = manager;
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req->user_ptr = device;
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if (name) wine_server_add_data( req, name->Buffer, name->Length );
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if (!(status = wine_server_call( req ))) handle = reply->handle;
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}
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SERVER_END_REQ;
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if (status == STATUS_SUCCESS)
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{
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device->DriverObject = driver;
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device->DeviceExtension = device + 1;
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device->DeviceType = type;
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device->Reserved = handle;
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device->NextDevice = driver->DeviceObject;
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driver->DeviceObject = device;
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*ret_device = device;
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}
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else HeapFree( GetProcessHeap(), 0, device );
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return status;
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}
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/***********************************************************************
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* IoDeleteDevice (NTOSKRNL.EXE.@)
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*/
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void WINAPI IoDeleteDevice( DEVICE_OBJECT *device )
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{
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NTSTATUS status;
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TRACE( "%p\n", device );
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SERVER_START_REQ( delete_device )
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{
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req->handle = device->Reserved;
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status = wine_server_call( req );
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}
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SERVER_END_REQ;
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if (status == STATUS_SUCCESS)
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{
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DEVICE_OBJECT **prev = &device->DriverObject->DeviceObject;
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while (*prev && *prev != device) prev = &(*prev)->NextDevice;
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if (*prev) *prev = (*prev)->NextDevice;
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NtClose( device->Reserved );
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HeapFree( GetProcessHeap(), 0, device );
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}
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}
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/*****************************************************
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* DllMain
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*/
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BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, LPVOID reserved )
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{
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switch(reason)
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{
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case DLL_PROCESS_ATTACH:
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DisableThreadLibraryCalls( inst );
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break;
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}
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return TRUE;
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}
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