diff options
author | Pete Batard <pbatard@gmail.com> | 2010-03-10 13:14:51 +0000 |
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committer | Pete Batard <pbatard@gmail.com> | 2010-03-10 13:14:51 +0000 |
commit | fae9c17bd2405813d44186c94367d6e66d3994e6 (patch) | |
tree | 8e795a9400182bdabb61229a3791f060af1d5335 /libusb/os/driver/dispatch.c | |
parent | 4ee3179ae1e0adefc6c5d19c036c297856ebdef9 (diff) | |
download | libusb-fae9c17bd2405813d44186c94367d6e66d3994e6.tar.gz |
libusb0.sys backend integration - part 2 (Graeme Gill)c190
Diffstat (limited to 'libusb/os/driver/dispatch.c')
-rw-r--r-- | libusb/os/driver/dispatch.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/libusb/os/driver/dispatch.c b/libusb/os/driver/dispatch.c new file mode 100644 index 0000000..98cd8e8 --- /dev/null +++ b/libusb/os/driver/dispatch.c @@ -0,0 +1,95 @@ +/* LIBUSB-WIN32, Generic Windows USB Library + * Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include "libusb_driver.h" + +NTSTATUS DDKAPI dispatch(DEVICE_OBJECT *device_object, IRP *irp) +{ + libusb_device_t *dev = device_object->DeviceExtension; + + switch(IoGetCurrentIrpStackLocation(irp)->MajorFunction) + { + case IRP_MJ_PNP: + return dispatch_pnp(dev, irp); + + case IRP_MJ_POWER: + return dispatch_power(dev, irp); + } + + /* since this driver may run as an upper filter we have to check whether */ + /* the IRP is sent to this device object or to the lower one */ + if(accept_irp(dev, irp)) + { + switch(IoGetCurrentIrpStackLocation(irp)->MajorFunction) + { + case IRP_MJ_DEVICE_CONTROL: + + if(dev->is_started) + { + return dispatch_ioctl(dev, irp); + } + else /* not started yet */ + { + return complete_irp(irp, STATUS_INVALID_DEVICE_STATE, 0); + } + + case IRP_MJ_CREATE: + + if(dev->is_started) + { + if(InterlockedIncrement(&dev->ref_count) == 1) + { + if(dev->power_state.DeviceState != PowerDeviceD0) + { + /* power up the device, block until the call */ + /* completes */ + power_set_device_state(dev, PowerDeviceD0, TRUE); + } + } + + return complete_irp(irp, STATUS_SUCCESS, 0); + } + else /* not started yet */ + { + return complete_irp(irp, STATUS_INVALID_DEVICE_STATE, 0); + } + + case IRP_MJ_CLOSE: + + if(!InterlockedDecrement(&dev->ref_count)) + { + /* release all interfaces when the last handle is closed */ + release_all_interfaces(dev); + } + return complete_irp(irp, STATUS_SUCCESS, 0); + + case IRP_MJ_CLEANUP: + + return complete_irp(irp, STATUS_SUCCESS, 0); + + default: + return complete_irp(irp, STATUS_NOT_SUPPORTED, 0); + } + } + else /* the IRP is for the lower device object */ + { + return pass_irp_down(dev, irp, NULL, NULL); + } +} + |