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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team, 1998-2005
*
* Signal processing / handling.
*
* ---------------------------------------------------------------------------*/
#ifndef RTS_SIGNALS_H
#define RTS_SIGNALS_H
#if !defined(PAR) && !defined(mingw32_HOST_OS)
#include "posix/Signals.h"
#elif defined(mingw32_HOST_OS)
#include "win32/ConsoleHandler.h"
#else /* PAR */
#define signals_pending() (rtsFalse)
#endif /* PAR */
#if RTS_USER_SIGNALS
/*
* Function: initUserSignals()
*
* Initialize the console handling substrate.
*/
extern void initUserSignals(void);
/*
* Function: initDefaultHandlers()
*
* Install any default signal/console handlers. Currently we install a
* Ctrl+C handler that shuts down the RTS in an orderly manner.
*/
extern void initDefaultHandlers(void);
extern void resetDefaultHandlers(void);
extern void freeSignalHandlers(void);
/*
* Function: blockUserSignals()
*
* Temporarily block the delivery of further console events. Needed to
* avoid race conditions when GCing the queue of outstanding handlers or
* when emptying the queue by running the handlers.
*
*/
extern void blockUserSignals(void);
/*
* Function: unblockUserSignals()
*
* The inverse of blockUserSignals(); re-enable the deliver of console events.
*/
extern void unblockUserSignals(void);
/*
* Function: awaitUserSignals()
*
* Wait for the next console event. Currently a NOP (returns immediately.)
*/
extern void awaitUserSignals(void);
/*
* Function: markSignalHandlers()
*
* Evacuate the handler queue. _Assumes_ that console event delivery
* has already been blocked.
*/
extern void markSignalHandlers (evac_fn evac, void *user);
#endif /* RTS_USER_SIGNALS */
#endif /* RTS_SIGNALS_H */
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