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/* -----------------------------------------------------------------------------
* $Id: Rts.h,v 1.7 1999/08/25 16:11:44 simonmar Exp $
*
* (c) The GHC Team, 1998-1999
*
* Top-level include file for the RTS itself
*
* ---------------------------------------------------------------------------*/
#ifndef RTS_H
#define RTS_H
#ifndef NO_REGS
#define NO_REGS /* don't define fixed registers */
#endif
#include "Stg.h"
/* -----------------------------------------------------------------------------
Miscellaneous garbage
-------------------------------------------------------------------------- */
#if ! defined(EXIT_SUCCESS) || ! defined(EXIT_FAILURE)
/* "stdlib.h" should have defined these; but at least
on SunOS 4.1.3, this is not so.
*/
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#endif
/* declarations for runtime flags/values */
#define MAX_RTS_ARGS 32
/* -----------------------------------------------------------------------------
Useful typedefs
-------------------------------------------------------------------------- */
typedef unsigned int nat; /* at least 32 bits (like int) */
typedef unsigned long lnat; /* at least 32 bits */
typedef unsigned long long ullong; /* at least 32 bits */
typedef enum {
rtsFalse = 0,
rtsTrue
} rtsBool;
/* -----------------------------------------------------------------------------
Assertions and Debuggery
-------------------------------------------------------------------------- */
#ifndef DEBUG
#define IF_DEBUG(c,s) doNothing()
#else
#define IF_DEBUG(c,s) if (RtsFlags.DebugFlags.c) { s; }
#endif
/* -----------------------------------------------------------------------------
Attributes
-------------------------------------------------------------------------- */
#ifdef __GNUC__ /* Avoid spurious warnings */
#if __GNUC__ >= 2 && __GNUC_MINOR__ >= 7
#define STG_NORETURN __attribute__ ((noreturn))
#define STG_UNUSED __attribute__ ((unused))
#else
#define STG_NORETURN
#define STG_UNUSED
#endif
#else
#define STG_NORETURN
#define STG_UNUSED
#endif
/* -----------------------------------------------------------------------------
Useful macros and inline functions
-------------------------------------------------------------------------- */
/*
* Use this on the RHS of macros which expand to nothing
* to make sure that the macro can be used in a context which
* demands a non-empty statement.
*/
#define doNothing() do { } while (0)
#define stg_min(a,b) ({typeof(a) _a = (a), _b = (b); _a <= _b ? _a : _b; })
#define stg_max(a,b) ({typeof(a) _a = (a), _b = (b); _a <= _b ? _b : _a; })
#endif RTS_H
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