in an active process, instead of sending a SIGTRAP.

Added a test case.

requests to a common file.

a kernel race condition.

refuse to change the thread desktop when it's in use.

- Implement checking tokens for privileges in the server.
- Implement NtPrivilegeCheck.

equivalent.

headers (with help from Dimitrie O. Paun).

structure, and make sure the queue is allocated when setting a hook.

always take 3 parameters.
Implemented a number of other ntdll thread functions, and use them
from the kernel ones.

signals with the main poll loop.

pid for platforms that use both.

(reported by Eric Pouech). Misc cleanups.

by the thread having already died when we send it a signal.
Use -1 instead of 0 as invalid Unix pid value.

depend on the parent pid to find the startup info.

structure.
Changed the poll()-related routines to deal with file descriptors
instead of objects and integrated poll support into fd.c.

Split off 16-bit hook functions and re-implemented them on top of the
32-bit ones; system-wide 16-bit hooks are no longer supported at this
point.

instead of using void*, and removed a number of type casts.