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A Device Driver for W2K Signals

By Panagiotis E., August 01, 2001

Unix signals provide a simple IPC that is also asynchronous - your signal handler gets invoked when the signal arrives, no matter what your code was in the middle of. Achieving the same effect under Windows 2000 requires a device driver, so that you can make use of asynchronous procedure calls (APCs).
August 2001/A Device Driver for W2K Signals/Listing 1

Listing 1: signals.h — Interface to signal library

/* Number of supported signals */
#define MAX_SIGNALS     4

/* Signal names */
#define SIGNAL0 0
#define SIGNAL1 1
#define SIGNAL2 2
#define SIGNAL3 3

#ifndef SIGNALSLIBAPI
#define SIGNALSLIBAPI __declspec(dllimport)
#endif

/* Set a signal handler */
SIGNALSLIBAPI DWORD SetSignalHandler(DWORD, PVOID);

/* Send a signal to a thread */
SIGNALSLIBAPI DWORD SendSignalToThread(HANDLE, DWORD);
/* End of File */


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