INtime® 3.1 Software - tenAsys

Appendix D: INtime software components
RtIf.sys (RT Interface Driver)
A Windows kernel mode device driver that co-manages the OSEM used by the INtime
product to add RT capabilities to Windows. This driver:
• Establishes the initial RT kernel environment.
• Co-manages switching between the Windows and INtime runtime environments.
• Supports communication and synchronization mechanisms between Windows
threads and RT threads by relaying NTX library requests.
Note
For detailed information, see INtime Help. For information about accessing help, see Where to get
more information on page vi.
Item
Pathname
Invocation
Description
C:\windows\system32\drivers\rtif.sys
Windows loads this driver at system initialization time.
RtIOCons.exe (INtime I/O console)
The RT I/O Console is a 32-bit Windows program that provides support for Windows
console I/O for RT threads. It creates and manages a single console window and
executes keyboard data (input) requests and display (output) requests from the RT
thread.
Item
Pathname
Invocation
Description
C:\Program Files\INtime\bin\rtiocons.exe
Invoked by RtIOSrv.exe (INtime I/O Service)
RtIOSrv.exe (INtime I/O Service)
A 32-bit Windows program that provides Windows file system and console I/O support
for RT threads. This program acts as a server to RT “C” library to obtain a console
window for display (via printf) of application data and to receive (via scanf) user input
from the system keyboard.
When the RT “C” library receives an stdio request from a real-time thread, it checks to
see if a console exists. If a console exists, it relays the request to the appropriate RT I/O
console If no console exists, it blocks the thread making the request, creates an RT I/O
console window for the thread via the INtime I/O Service, and relays the request to the
RT I/O console. When a request completes, the INtime I/O Service unblocks the
corresponding thread and relays the reply. If Windows terminates execution, the RT
I/O Console terminates all pending requests with an E_EXIST error.
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