cdefs.h@ 9800

Last change on this file since 9800 was 9411, checked in by vboxsync, 17 years ago
Use a union for esp & rsp, so they are in-sync.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
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1	/** @file
2	* IPRT - Common C and C++ definitions.
3	*/
4
5	/*
6	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*
16	* The contents of this file may alternatively be used under the terms
17	* of the Common Development and Distribution License Version 1.0
18	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
19	* VirtualBox OSE distribution, in which case the provisions of the
20	* CDDL are applicable instead of those of the GPL.
21	*
22	* You may elect to license modified versions of this file under the
23	* terms and conditions of either the GPL or the CDDL or both.
24	*
25	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
26	* Clara, CA 95054 USA or visit http://www.sun.com if you need
27	* additional information or have any questions.
28	*/
29
30	#ifndef ___iprt_cdefs_h
31	#define ___iprt_cdefs_h
32
33
34	/** @defgroup grp_rt_cdefs IPRT Common Definitions and Macros
35	* @{
36	*/
37
38	/*
39	* Include sys/cdefs.h if present, if not define the stuff we need.
40	*/
41	#ifdef HAVE_SYS_CDEFS_H
42	# if defined(RT_ARCH_LINUX) && defined(__KERNEL__)
43	# error "oops"
44	# endif
45	# include <sys/cdefs.h>
46	#else
47
48	/** @def __BEGIN_DECLS
49	* Used to start a block of function declarations which are shared
50	* between C and C++ program.
51	*/
52
53	/** @def __END_DECLS
54	* Used to end a block of function declarations which are shared
55	* between C and C++ program.
56	*/
57
58	#if defined(__cplusplus)
59	# define __BEGIN_DECLS extern "C" {
60	# define __END_DECLS }
61	#else
62	# define __BEGIN_DECLS
63	# define __END_DECLS
64	#endif
65
66	#endif
67
68
69	/*
70	* Shut up DOXYGEN warnings and guide it properly thru the code.
71	*/
72	#ifdef DOXYGEN_RUNNING
73	#define __AMD64__
74	#define __X86__
75	#define RT_ARCH_AMD64
76	#define RT_ARCH_X86
77	#define IN_RING0
78	#define IN_RING3
79	#define IN_GC
80	#define IN_RT_GC
81	#define IN_RT_R0
82	#define IN_RT_R3
83	#define RT_STRICT
84	#define Breakpoint
85	#define RT_NO_DEPRECATED_MACROS
86	#endif /* DOXYGEN_RUNNING */
87
88	/** @def RT_ARCH_X86
89	* Indicates that we're compiling for the X86 architecture.
90	*/
91
92	/** @def RT_ARCH_AMD64
93	* Indicates that we're compiling for the AMD64 architecture.
94	*/
95	#if !defined(RT_ARCH_X86) && !defined(RT_ARCH_AMD64)
96	# if defined(__amd64__) \|\| defined(__x86_64__) \|\| defined(_M_X64) \|\| defined(__AMD64__)
97	# define RT_ARCH_AMD64
98	# elif defined(__i386__) \|\| defined(_M_IX86) \|\| defined(__X86__)
99	# define RT_ARCH_X86
100	# else /* PORTME: append test for new archs. */
101	# error "Check what predefined stuff your compiler uses to indicate architecture."
102	# endif
103	#elif defined(RT_ARCH_X86) && defined(RT_ARCH_AMD64) /* PORTME: append new archs. */
104	# error "Both RT_ARCH_X86 and RT_ARCH_AMD64 cannot be defined at the same time!"
105	#endif
106
107
108	/** @def __X86__
109	* Indicates that we're compiling for the X86 architecture.
110	* @deprecated
111	*/
112
113	/** @def __AMD64__
114	* Indicates that we're compiling for the AMD64 architecture.
115	* @deprecated
116	*/
117	#if !defined(__X86__) && !defined(__AMD64__)
118	# if defined(RT_ARCH_AMD64)
119	# define __AMD64__
120	# elif defined(RT_ARCH_X86)
121	# define __X86__
122	# else
123	# error "Check what predefined stuff your compiler uses to indicate architecture."
124	# endif
125	#elif defined(__X86__) && defined(__AMD64__)
126	# error "Both __X86__ and __AMD64__ cannot be defined at the same time!"
127	#elif defined(__X86__) && !defined(RT_ARCH_X86)
128	# error "Both __X86__ without RT_ARCH_X86!"
129	#elif defined(__AMD64__) && !defined(RT_ARCH_AMD64)
130	# error "Both __AMD64__ without RT_ARCH_AMD64!"
131	#endif
132
133	/** @def IN_RING0
134	* Used to indicate that we're compiling code which is running
135	* in Ring-0 Host Context.
136	*/
137
138	/** @def IN_RING3
139	* Used to indicate that we're compiling code which is running
140	* in Ring-3 Host Context.
141	*/
142
143	/** @def IN_GC
144	* Used to indicate that we're compiling code which is running
145	* in Guest Context (implies R0).
146	*/
147	#if !defined(IN_RING3) && !defined(IN_RING0) && !defined(IN_GC)
148	# error "You must defined which context the compiled code should run in; IN_RING3, IN_RING0 or IN_GC"
149	#endif
150	#if (defined(IN_RING3) && (defined(IN_RING0) \|\| defined(IN_GC)) ) \
151	\|\| (defined(IN_RING0) && (defined(IN_RING3) \|\| defined(IN_GC)) ) \
152	\|\| (defined(IN_GC) && (defined(IN_RING3) \|\| defined(IN_RING0)) )
153	# error "Only one of the IN_RING3, IN_RING0, IN_GC defines should be defined."
154	#endif
155
156
157	/** @def ARCH_BITS
158	* Defines the bit count of the current context.
159	*/
160	#if !defined(ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
161	# if defined(RT_ARCH_AMD64)
162	# define ARCH_BITS 64
163	# else
164	# define ARCH_BITS 32
165	# endif
166	#endif
167
168	/** @def HC_ARCH_BITS
169	* Defines the host architecture bit count.
170	*/
171	#if !defined(HC_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
172	# ifndef IN_GC
173	# define HC_ARCH_BITS ARCH_BITS
174	# else
175	# define HC_ARCH_BITS 32
176	# endif
177	#endif
178
179	/** @def GC_ARCH_BITS
180	* Defines the guest architecture bit count.
181	*/
182	#if !defined(GC_ARCH_BITS) && !defined(DOXYGEN_RUNNING)
183	# ifdef VBOX_WITH_64_BITS_GUESTS
184	# define GC_ARCH_BITS 64
185	# else
186	# define GC_ARCH_BITS 32
187	# endif
188	#endif
189
190	/** @def R3_ARCH_BITS
191	* Defines the host ring-3 architecture bit count.
192	*/
193	#if !defined(R3_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
194	# ifdef IN_RING3
195	# define R3_ARCH_BITS ARCH_BITS
196	# else
197	# define R3_ARCH_BITS HC_ARCH_BITS
198	# endif
199	#endif
200
201	/** @def R0_ARCH_BITS
202	* Defines the host ring-0 architecture bit count.
203	*/
204	#if !defined(R0_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
205	# ifdef IN_RING0
206	# define R0_ARCH_BITS ARCH_BITS
207	# else
208	# define R0_ARCH_BITS HC_ARCH_BITS
209	# endif
210	#endif
211
212	/** @def GC_ARCH_BITS
213	* Defines the guest architecture bit count.
214	*/
215	#if !defined(GC_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
216	# ifdef IN_GC
217	# define GC_ARCH_BITS ARCH_BITS
218	# else
219	# define GC_ARCH_BITS 32
220	# endif
221	#endif
222
223
224	/** @def CTXTYPE
225	* Declare a type differently in GC, R3 and R0.
226	*
227	* @param GCType The GC type.
228	* @param R3Type The R3 type.
229	* @param R0Type The R0 type.
230	* @remark For pointers used only in one context use RCPTRTYPE(), R3R0PTRTYPE(), R3PTRTYPE() or R0PTRTYPE().
231	*/
232	#ifdef IN_GC
233	# define CTXTYPE(GCType, R3Type, R0Type) GCType
234	#elif defined(IN_RING3)
235	# define CTXTYPE(GCType, R3Type, R0Type) R3Type
236	#else
237	# define CTXTYPE(GCType, R3Type, R0Type) R0Type
238	#endif
239
240	/** @def GCTYPE
241	* Declare a type differently in GC and HC.
242	*
243	* @param GCType The GC type.
244	* @param HCType The HC type.
245	* @remark For pointers used only in one context use RCPTRTYPE(), R3R0PTRTYPE(), R3PTRTYPE() or R0PTRTYPE().
246	*/
247	#define GCTYPE(GCType, HCType) CTXTYPE(GCType, HCType, HCType)
248
249	/** @def RCPTRTYPE
250	* Declare a pointer which is used in the raw mode context but appears in structure(s) used by
251	* both HC and RC. The main purpose is to make sure structures have the same
252	* size when built for different architectures.
253	*
254	* @param RCType The RC type.
255	*/
256	#define RCPTRTYPE(RCType) CTXTYPE(RCType, RTRCPTR, RTRCPTR)
257
258	/** @def R3R0PTRTYPE
259	* Declare a pointer which is used in HC, is explicitely valid in ring 3 and 0,
260	* but appears in structure(s) used by both HC and GC. The main purpose is to
261	* make sure structures have the same size when built for different architectures.
262	*
263	* @param R3R0Type The R3R0 type.
264	* @remarks This used to be called HCPTRTYPE.
265	*/
266	#define R3R0PTRTYPE(R3R0Type) CTXTYPE(RTHCPTR, R3R0Type, R3R0Type)
267
268	/** @def R3PTRTYPE
269	* Declare a pointer which is used in R3 but appears in structure(s) used by
270	* both HC and GC. The main purpose is to make sure structures have the same
271	* size when built for different architectures.
272	*
273	* @param R3Type The R3 type.
274	*/
275	#define R3PTRTYPE(R3Type) CTXTYPE(RTHCUINTPTR, R3Type, RTHCUINTPTR)
276
277	/** @def R0PTRTYPE
278	* Declare a pointer which is used in R0 but appears in structure(s) used by
279	* both HC and GC. The main purpose is to make sure structures have the same
280	* size when built for different architectures.
281	*
282	* @param R0Type The R0 type.
283	*/
284	#define R0PTRTYPE(R0Type) CTXTYPE(RTHCUINTPTR, RTHCUINTPTR, R0Type)
285
286	/** @def CTXSUFF
287	* Adds the suffix of the current context to the passed in
288	* identifier name. The suffix is HC or GC.
289	*
290	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
291	* @param var Identifier name.
292	*/
293	/** @def OTHERCTXSUFF
294	* Adds the suffix of the other context to the passed in
295	* identifier name. The suffix is HC or GC.
296	*
297	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
298	* @param var Identifier name.
299	*/
300	#ifdef IN_GC
301	# define CTXSUFF(var) var##GC
302	# define OTHERCTXSUFF(var) var##HC
303	#else
304	# define CTXSUFF(var) var##HC
305	# define OTHERCTXSUFF(var) var##GC
306	#endif
307
308	/** @def CTXALLSUFF
309	* Adds the suffix of the current context to the passed in
310	* identifier name. The suffix is R3, R0 or GC.
311	*
312	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
313	* @param var Identifier name.
314	*/
315	#ifdef IN_GC
316	# define CTXALLSUFF(var) var##GC
317	#elif defined(IN_RING0)
318	# define CTXALLSUFF(var) var##R0
319	#else
320	# define CTXALLSUFF(var) var##R3
321	#endif
322
323	/** @def CTXMID
324	* Adds the current context as a middle name of an identifier name
325	* The middle name is HC or GC.
326	*
327	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
328	* @param first First name.
329	* @param last Surname.
330	*/
331	/** @def OTHERCTXMID
332	* Adds the other context as a middle name of an identifier name
333	* The middle name is HC or GC.
334	*
335	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
336	* @param first First name.
337	* @param last Surname.
338	*/
339	#ifdef IN_GC
340	# define CTXMID(first, last) first##GC##last
341	# define OTHERCTXMID(first, last) first##HC##last
342	#else
343	# define CTXMID(first, last) first##HC##last
344	# define OTHERCTXMID(first, last) first##GC##last
345	#endif
346
347	/** @def CTXALLMID
348	* Adds the current context as a middle name of an identifier name
349	* The middle name is R3, R0 or GC.
350	*
351	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
352	* @param first First name.
353	* @param last Surname.
354	*/
355	#ifdef IN_GC
356	# define CTXALLMID(first, last) first##GC##last
357	#elif defined(IN_RING0)
358	# define CTXALLMID(first, last) first##R0##last
359	#else
360	# define CTXALLMID(first, last) first##R3##last
361	#endif
362
363
364	/** @def R3STRING
365	* A macro which in GC and R0 will return a dummy string while in R3 it will return
366	* the parameter.
367	*
368	* This is typically used to wrap description strings in structures shared
369	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_RING3 mess.
370	*
371	* @param pR3String The R3 string. Only referenced in R3.
372	* @see R0STRING and GCSTRING
373	*/
374	#ifdef IN_RING3
375	# define R3STRING(pR3String) (pR3String)
376	#else
377	# define R3STRING(pR3String) ("<R3_STRING>")
378	#endif
379
380	/** @def R0STRING
381	* A macro which in GC and R3 will return a dummy string while in R0 it will return
382	* the parameter.
383	*
384	* This is typically used to wrap description strings in structures shared
385	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_RING0 mess.
386	*
387	* @param pR0String The R0 string. Only referenced in R0.
388	* @see R3STRING and GCSTRING
389	*/
390	#ifdef IN_RING0
391	# define R0STRING(pR0String) (pR0String)
392	#else
393	# define R0STRING(pR0String) ("<R0_STRING>")
394	#endif
395
396	/** @def GCSTRING
397	* A macro which in R3 and R0 will return a dummy string while in GC it will return
398	* the parameter.
399	*
400	* This is typically used to wrap description strings in structures shared
401	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_GC mess.
402	*
403	* @param pR0String The GC string. Only referenced in GC.
404	* @see R3STRING, R0STRING
405	*/
406	#ifdef IN_GC
407	# define GCSTRING(pR0String) (pGCString)
408	#else
409	# define GCSTRING(pR0String) ("<GC_STRING>")
410	#endif
411
412	/** @def HCSTRING
413	* Macro which in GC will return a dummy string while in HC will return
414	* the parameter.
415	*
416	* This is typically used to wrap description strings in structures shared
417	* between HC and GC. The intention is to avoid the \#ifdef IN_GC kludge.
418	*
419	* @param pHCString The HC string. Only referenced in HC.
420	* @deprecated Use R3STRING or R0STRING instead.
421	*/
422	#ifdef IN_GC
423	# define HCSTRING(pHCString) ("<HC_STRING>")
424	#else
425	# define HCSTRING(pHCString) (pHCString)
426	#endif
427
428
429	/** @def RTCALL
430	* The standard calling convention for the Runtime interfaces.
431	*/
432	#ifdef _MSC_VER
433	# define RTCALL __cdecl
434	#elif defined(__GNUC__) && defined(IN_RING0) && !(defined(RT_OS_OS2) \|\| defined(RT_ARCH_AMD64)) /* the latter is kernel/gcc */
435	# define RTCALL __attribute__((cdecl,regparm(0)))
436	#else
437	# define RTCALL
438	#endif
439
440	/** @def DECLEXPORT
441	* How to declare an exported function.
442	* @param type The return type of the function declaration.
443	*/
444	#if defined(_MSC_VER) \|\| defined(RT_OS_OS2)
445	# define DECLEXPORT(type) __declspec(dllexport) type
446	#else
447	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
448	# define DECLEXPORT(type) __attribute__((visibility("default"))) type
449	# else
450	# define DECLEXPORT(type) type
451	# endif
452	#endif
453
454	/** @def DECLIMPORT
455	* How to declare an imported function.
456	* @param type The return type of the function declaration.
457	*/
458	#if defined(_MSC_VER) \|\| (defined(RT_OS_OS2) && !defined(__IBMC__) && !defined(__IBMCPP__))
459	# define DECLIMPORT(type) __declspec(dllimport) type
460	#else
461	# define DECLIMPORT(type) type
462	#endif
463
464	/** @def DECLASM
465	* How to declare an internal assembly function.
466	* @param type The return type of the function declaration.
467	*/
468	#ifdef __cplusplus
469	# ifdef _MSC_VER
470	# define DECLASM(type) extern "C" type __cdecl
471	# else
472	# define DECLASM(type) extern "C" type
473	# endif
474	#else
475	# ifdef _MSC_VER
476	# define DECLASM(type) type __cdecl
477	# else
478	# define DECLASM(type) type
479	# endif
480	#endif
481
482	/** @def DECLASMTYPE
483	* How to declare an internal assembly function type.
484	* @param type The return type of the function.
485	*/
486	#ifdef _MSC_VER
487	# define DECLASMTYPE(type) type __cdecl
488	#else
489	# define DECLASMTYPE(type) type
490	#endif
491
492	/** @def DECLNORETURN
493	* How to declare a function which does not return.
494	* @note: This macro can be combined with other macros, for example
495	* @code
496	* EMR3DECL(DECLNORETURN(void)) foo(void);
497	* @endcode
498	*/
499	#ifdef _MSC_VER
500	# define DECLNORETURN(type) __declspec(noreturn) type
501	#elif defined(__GNUC__)
502	# define DECLNORETURN(type) __attribute__((noreturn)) type
503	#else
504	# define DECLNORETURN(type) type
505	#endif
506
507	/** @def DECLCALLBACK
508	* How to declare an call back function type.
509	* @param type The return type of the function declaration.
510	*/
511	#define DECLCALLBACK(type) type RTCALL
512
513	/** @def DECLCALLBACKPTR
514	* How to declare an call back function pointer.
515	* @param type The return type of the function declaration.
516	* @param name The name of the variable member.
517	*/
518	#define DECLCALLBACKPTR(type, name) type (RTCALL * name)
519
520	/** @def DECLCALLBACKMEMBER
521	* How to declare an call back function pointer member.
522	* @param type The return type of the function declaration.
523	* @param name The name of the struct/union/class member.
524	*/
525	#define DECLCALLBACKMEMBER(type, name) type (RTCALL * name)
526
527	/** @def DECLR3CALLBACKMEMBER
528	* How to declare an call back function pointer member - R3 Ptr.
529	* @param type The return type of the function declaration.
530	* @param name The name of the struct/union/class member.
531	* @param args The argument list enclosed in parentheses.
532	*/
533	#ifdef IN_RING3
534	# define DECLR3CALLBACKMEMBER(type, name, args) type (RTCALL * name) args
535	#else
536	# define DECLR3CALLBACKMEMBER(type, name, args) RTR3PTR name
537	#endif
538
539	/** @def DECLGCCALLBACKMEMBER
540	* How to declare an call back function pointer member - GC Ptr.
541	* @param type The return type of the function declaration.
542	* @param name The name of the struct/union/class member.
543	* @param args The argument list enclosed in parentheses.
544	*/
545	#ifdef IN_GC
546	# define DECLGCCALLBACKMEMBER(type, name, args) type (RTCALL * name) args
547	#else
548	# define DECLGCCALLBACKMEMBER(type, name, args) RTRCPTR name
549	#endif
550
551	/** @def DECLR0CALLBACKMEMBER
552	* How to declare an call back function pointer member - R0 Ptr.
553	* @param type The return type of the function declaration.
554	* @param name The name of the struct/union/class member.
555	* @param args The argument list enclosed in parentheses.
556	*/
557	#ifdef IN_RING0
558	# define DECLR0CALLBACKMEMBER(type, name, args) type (RTCALL * name) args
559	#else
560	# define DECLR0CALLBACKMEMBER(type, name, args) RTR0PTR name
561	#endif
562
563	/** @def DECLINLINE
564	* How to declare a function as inline.
565	* @param type The return type of the function declaration.
566	* @remarks Don't use this macro on C++ methods.
567	*/
568	#ifdef __GNUC__
569	# define DECLINLINE(type) static __inline__ type
570	#elif defined(__cplusplus)
571	# define DECLINLINE(type) inline type
572	#elif defined(_MSC_VER)
573	# define DECLINLINE(type) _inline type
574	#elif defined(__IBMC__)
575	# define DECLINLINE(type) _Inline type
576	#else
577	# define DECLINLINE(type) inline type
578	#endif
579
580
581	/** @def IN_RT_R0
582	* Used to indicate whether we're inside the same link module as
583	* the HC Ring-0 Runtime Library.
584	*/
585	/** @def RTR0DECL(type)
586	* Runtime Library HC Ring-0 export or import declaration.
587	* @param type The return type of the function declaration.
588	*/
589	#ifdef IN_RT_R0
590	# define RTR0DECL(type) DECLEXPORT(type) RTCALL
591	#else
592	# define RTR0DECL(type) DECLIMPORT(type) RTCALL
593	#endif
594
595	/** @def IN_RT_R3
596	* Used to indicate whether we're inside the same link module as
597	* the HC Ring-3 Runtime Library.
598	*/
599	/** @def RTR3DECL(type)
600	* Runtime Library HC Ring-3 export or import declaration.
601	* @param type The return type of the function declaration.
602	*/
603	#ifdef IN_RT_R3
604	# define RTR3DECL(type) DECLEXPORT(type) RTCALL
605	#else
606	# define RTR3DECL(type) DECLIMPORT(type) RTCALL
607	#endif
608
609	/** @def IN_RT_GC
610	* Used to indicate whether we're inside the same link module as
611	* the GC Runtime Library.
612	*/
613	/** @def RTGCDECL(type)
614	* Runtime Library HC Ring-3 export or import declaration.
615	* @param type The return type of the function declaration.
616	*/
617	#ifdef IN_RT_GC
618	# define RTGCDECL(type) DECLEXPORT(type) RTCALL
619	#else
620	# define RTGCDECL(type) DECLIMPORT(type) RTCALL
621	#endif
622
623	/** @def RTDECL(type)
624	* Runtime Library export or import declaration.
625	* Functions declared using this macro exists in all contexts.
626	* @param type The return type of the function declaration.
627	*/
628	#if defined(IN_RT_R3) \|\| defined(IN_RT_GC) \|\| defined(IN_RT_R0)
629	# define RTDECL(type) DECLEXPORT(type) RTCALL
630	#else
631	# define RTDECL(type) DECLIMPORT(type) RTCALL
632	#endif
633
634	/** @def RTDATADECL(type)
635	* Runtime Library export or import declaration.
636	* Data declared using this macro exists in all contexts.
637	* @param type The return type of the function declaration.
638	*/
639	#if defined(IN_RT_R3) \|\| defined(IN_RT_GC) \|\| defined(IN_RT_R0)
640	# define RTDATADECL(type) DECLEXPORT(type)
641	#else
642	# define RTDATADECL(type) DECLIMPORT(type)
643	#endif
644
645
646	/** @def RT_NOCRT
647	* Symbol name wrapper for the No-CRT bits.
648	*
649	* In order to coexist in the same process as other CRTs, we need to
650	* decorate the symbols such that they don't conflict the ones in the
651	* other CRTs. The result of such conflicts / duplicate symbols can
652	* confuse the dynamic loader on unix like systems.
653	*
654	* Define RT_WITHOUT_NOCRT_WRAPPERS to drop the wrapping.
655	* Define RT_WITHOUT_NOCRT_WRAPPER_ALIASES to drop the aliases to the
656	* wrapped names.
657	*/
658	/** @def RT_NOCRT_STR
659	* Same as RT_NOCRT only it'll return a double quoted string of the result.
660	*/
661	#ifndef RT_WITHOUT_NOCRT_WRAPPERS
662	# define RT_NOCRT(name) nocrt_ ## name
663	# define RT_NOCRT_STR(name) "nocrt_" # name
664	#else
665	# define RT_NOCRT(name) name
666	# define RT_NOCRT_STR(name) #name
667	#endif
668
669
670
671	/** @def RT_LIKELY
672	* Give the compiler a hint that an expression is very likely to hold true.
673	*
674	* Some compilers support explicit branch prediction so that the CPU backend
675	* can hint the processor and also so that code blocks can be reordered such
676	* that the predicted path sees a more linear flow, thus improving cache
677	* behaviour, etc.
678	*
679	* IPRT provides the macros RT_LIKELY() and RT_UNLIKELY() as a way to utilize
680	* this compiler feature when present.
681	*
682	* A few notes about the usage:
683	*
684	* - Generally, use RT_UNLIKELY() with error condition checks (unless you
685	* have some _strong_ reason to do otherwise, in which case document it),
686	* and/or RT_LIKELY() with success condition checks, assuming you want
687	* to optimize for the success path.
688	*
689	* - Other than that, if you don't know the likelihood of a test succeeding
690	* from empirical or other 'hard' evidence, don't make predictions unless
691	* you happen to be a Dirk Gently.
692	*
693	* - These macros are meant to be used in places that get executed a lot. It
694	* is wasteful to make predictions in code that is executed seldomly (e.g.
695	* at subsystem initialization time) as the basic block reording that this
696	* affecs can often generate larger code.
697	*
698	* - Note that RT_SUCCESS() and RT_FAILURE() already makes use of RT_LIKELY()
699	* and RT_UNLIKELY(). Should you wish for prediction free status checks,
700	* use the RT_SUCCESS_NP() and RT_FAILURE_NP() macros instead.
701	*
702	*
703	* @returns the boolean result of the expression.
704	* @param expr The expression that's very likely to be true.
705	* @see RT_UNLIKELY
706	*/
707	/** @def RT_UNLIKELY
708	* Give the compiler a hint that an expression is highly unlikely hold true.
709	*
710	* See the usage instructions give in the RT_LIKELY() docs.
711	*
712	* @returns the boolean result of the expression.
713	* @param expr The expression that's very unlikely to be true.
714	* @see RT_LIKELY
715	*/
716	#if defined(__GNUC__)
717	# if __GNUC__ >= 3
718	# define RT_LIKELY(expr) __builtin_expect(!!(expr), 1)
719	# define RT_UNLIKELY(expr) __builtin_expect(!!(expr), 0)
720	# else
721	# define RT_LIKELY(expr) (expr)
722	# define RT_UNLIKELY(expr) (expr)
723	# endif
724	#else
725	# define RT_LIKELY(expr) (expr)
726	# define RT_UNLIKELY(expr) (expr)
727	#endif
728
729
730	/** @def RT_BIT
731	* Make a bitmask for one integer sized bit.
732	* @param bit Bit number.
733	*/
734	#define RT_BIT(bit) (1U << (bit))
735
736	/** @def RT_BIT_32
737	* Make a 32-bit bitmask for one bit.
738	* @param bit Bit number.
739	*/
740	#define RT_BIT_32(bit) (UINT32_C(1) << (bit))
741
742	/** @def RT_BIT_64
743	* Make a 64-bit bitmask for one bit.
744	* @param bit Bit number.
745	*/
746	#define RT_BIT_64(bit) (UINT64_C(1) << (bit))
747
748	/** @def RT_ALIGN
749	* Align macro.
750	* @param u Value to align.
751	* @param uAlignment The alignment. Power of two!
752	*
753	* @remark Be extremely careful when using this macro with type which sizeof != sizeof int.
754	* When possible use any of the other RT_ALIGN_* macros. And when that's not
755	* possible, make 101% sure that uAlignment is specified with a right sized type.
756	*
757	* Specifying an unsigned 32-bit alignment constant with a 64-bit value will give
758	* you a 32-bit return value!
759	*
760	* In short: Don't use this macro. Use RT_ALIGN_T() instead.
761	*/
762	#define RT_ALIGN(u, uAlignment) ( ((u) + ((uAlignment) - 1)) & ~((uAlignment) - 1) )
763
764	/** @def RT_ALIGN_T
765	* Align macro.
766	* @param u Value to align.
767	* @param uAlignment The alignment. Power of two!
768	* @param type Integer type to use while aligning.
769	* @remark This macro is the prefered alignment macro, it doesn't have any of the pitfalls RT_ALIGN has.
770	*/
771	#define RT_ALIGN_T(u, uAlignment, type) ( ((type)(u) + ((uAlignment) - 1)) & ~(type)((uAlignment) - 1) )
772
773	/** @def RT_ALIGN_32
774	* Align macro for a 32-bit value.
775	* @param u32 Value to align.
776	* @param uAlignment The alignment. Power of two!
777	*/
778	#define RT_ALIGN_32(u32, uAlignment) RT_ALIGN_T(u32, uAlignment, uint32_t)
779
780	/** @def RT_ALIGN_64
781	* Align macro for a 64-bit value.
782	* @param u64 Value to align.
783	* @param uAlignment The alignment. Power of two!
784	*/
785	#define RT_ALIGN_64(u64, uAlignment) RT_ALIGN_T(u64, uAlignment, uint64_t)
786
787	/** @def RT_ALIGN_Z
788	* Align macro for size_t.
789	* @param cb Value to align.
790	* @param uAlignment The alignment. Power of two!
791	*/
792	#define RT_ALIGN_Z(cb, uAlignment) RT_ALIGN_T(cb, uAlignment, size_t)
793
794	/** @def RT_ALIGN_P
795	* Align macro for pointers.
796	* @param pv Value to align.
797	* @param uAlignment The alignment. Power of two!
798	*/
799	#define RT_ALIGN_P(pv, uAlignment) RT_ALIGN_PT(pv, uAlignment, void *)
800
801	/** @def RT_ALIGN_PT
802	* Align macro for pointers with type cast.
803	* @param u Value to align.
804	* @param uAlignment The alignment. Power of two!
805	* @param CastType The type to cast the result to.
806	*/
807	#define RT_ALIGN_PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, uintptr_t))
808
809	/** @def RT_ALIGN_R3PT
810	* Align macro for ring-3 pointers with type cast.
811	* @param u Value to align.
812	* @param uAlignment The alignment. Power of two!
813	* @param CastType The type to cast the result to.
814	*/
815	#define RT_ALIGN_R3PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTR3UINTPTR))
816
817	/** @def RT_ALIGN_R0PT
818	* Align macro for ring-0 pointers with type cast.
819	* @param u Value to align.
820	* @param uAlignment The alignment. Power of two!
821	* @param CastType The type to cast the result to.
822	*/
823	#define RT_ALIGN_R0PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTR0UINTPTR))
824
825	/** @def RT_ALIGN_GCPT
826	* Align macro for GC pointers with type cast.
827	* @param u Value to align.
828	* @param uAlignment The alignment. Power of two!
829	* @param CastType The type to cast the result to.
830	*/
831	#define RT_ALIGN_GCPT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTGCUINTPTR))
832
833
834	/** @def RT_OFFSETOF
835	* Our own special offsetof() variant, returns a signed result.
836	*
837	* This differs from the usual offsetof() in that it's not relying on builtin
838	* compiler stuff and thus can use variables in arrays the structure may
839	* contain. If in this usful to determin the sizes of structures ending
840	* with a variable length field.
841	*
842	* @returns offset into the structure of the specified member. signed.
843	* @param type Structure type.
844	* @param member Member.
845	*/
846	#define RT_OFFSETOF(type, member) ( (int)(uintptr_t)&( ((type )(void )0)->member) )
847
848	/** @def RT_UOFFSETOF
849	* Our own special offsetof() variant, returns an unsigned result.
850	*
851	* This differs from the usual offsetof() in that it's not relying on builtin
852	* compiler stuff and thus can use variables in arrays the structure may
853	* contain. If in this usful to determin the sizes of structures ending
854	* with a variable length field.
855	*
856	* @returns offset into the structure of the specified member. unsigned.
857	* @param type Structure type.
858	* @param member Member.
859	*/
860	#define RT_UOFFSETOF(type, member) ( (uintptr_t)&( ((type )(void )0)->member) )
861
862	/** @def RT_SIZEOFMEMB
863	* Get the size of a structure member.
864	*
865	* @returns size of the structure member.
866	* @param type Structure type.
867	* @param member Member.
868	*/
869	#define RT_SIZEOFMEMB(type, member) ( sizeof(((type )(void )0)->member) )
870
871	/** @def RT_ELEMENTS
872	* Calcs the number of elements in an array.
873	* @returns Element count.
874	* @param aArray Array in question.
875	*/
876	#define RT_ELEMENTS(aArray) ( sizeof(aArray) / sizeof((aArray)[0]) )
877
878	#ifdef RT_OS_OS2
879	/* Undefine RT_MAX since there is an unfortunate clash with the max
880	resource type define in os2.h. */
881	# undef RT_MAX
882	#endif
883
884	/** @def RT_MAX
885	* Finds the maximum value.
886	* @returns The higher of the two.
887	* @param Value1 Value 1
888	* @param Value2 Value 2
889	*/
890	#define RT_MAX(Value1, Value2) ((Value1) >= (Value2) ? (Value1) : (Value2))
891
892	/** @def RT_MIN
893	* Finds the minimum value.
894	* @returns The lower of the two.
895	* @param Value1 Value 1
896	* @param Value2 Value 2
897	*/
898	#define RT_MIN(Value1, Value2) ((Value1) <= (Value2) ? (Value1) : (Value2))
899
900	/** @def RT_ABS
901	* Get the absolute (non-negative) value.
902	* @returns The absolute value of Value.
903	* @param Value The value.
904	*/
905	#define RT_ABS(Value) ((Value) >= 0 ? (Value) : -(Value))
906
907	/** @def RT_LOWORD
908	* Gets the low word (=uint16_t) of something. */
909	#define RT_LOWORD(a) ((a) & 0xffff)
910
911	/** @def RT_HIWORD
912	* Gets the high word (=uint16_t) of a 32 bit something. */
913	#define RT_HIWORD(a) ((a) >> 16)
914
915	/** @def RT_LOBYTE
916	* Gets the low byte of something. */
917	#define RT_LOBYTE(a) ((a) & 0xff)
918
919	/** @def RT_HIBYTE
920	* Gets the low byte of a 16 bit something. */
921	#define RT_HIBYTE(a) ((a) >> 8)
922
923	/** @def RT_BYTE1
924	* Gets first byte of something. */
925	#define RT_BYTE1(a) ((a) & 0xff)
926
927	/** @def RT_BYTE2
928	* Gets second byte of something. */
929	#define RT_BYTE2(a) (((a) >> 8) & 0xff)
930
931	/** @def RT_BYTE3
932	* Gets second byte of something. */
933	#define RT_BYTE3(a) (((a) >> 16) & 0xff)
934
935	/** @def RT_BYTE4
936	* Gets fourth byte of something. */
937	#define RT_BYTE4(a) (((a) >> 24) & 0xff)
938
939
940	/** @def RT_MAKE_U64
941	* Constructs a uint64_t value from two uint32_t values.
942	*/
943	#define RT_MAKE_U64(Lo, Hi) ( (uint64_t)((uint32_t)(Hi)) << 32 \| (uint32_t)(Lo) )
944
945	/** @def RT_MAKE_U64_FROM_U16
946	* Constructs a uint64_t value from four uint16_t values.
947	*/
948	#define RT_MAKE_U64_FROM_U16(w0, w1, w2, w3) \
949	( (uint64_t)((uint16_t)(w3)) << 48 \
950	\| (uint64_t)((uint16_t)(w2)) << 32 \
951	\| (uint32_t)((uint16_t)(w1)) << 16 \
952	\| (uint16_t)(w0) )
953
954	/** @def RT_MAKE_U64_FROM_U8
955	* Constructs a uint64_t value from eight uint8_t values.
956	*/
957	#define RT_MAKE_U64_FROM_U8(b0, b1, b2, b3, b4, b5, b6, b7) \
958	( (uint64_t)((uint8_t)(b7)) << 56 \
959	\| (uint64_t)((uint8_t)(b6)) << 48 \
960	\| (uint64_t)((uint8_t)(b5)) << 40 \
961	\| (uint64_t)((uint8_t)(b4)) << 32 \
962	\| (uint32_t)((uint8_t)(b3)) << 24 \
963	\| (uint32_t)((uint8_t)(b2)) << 16 \
964	\| (uint16_t)((uint8_t)(b1)) << 8 \
965	\| (uint8_t)(b0) )
966
967	/** @def RT_MAKE_U32
968	* Constructs a uint32_t value from two uint16_t values.
969	*/
970	#define RT_MAKE_U32(Lo, Hi) ( (uint32_t)((uint16_t)(Hi)) << 16 \| (uint16_t)(Lo) )
971
972	/** @def RT_MAKE_U32_FROM_U8
973	* Constructs a uint32_t value from four uint8_t values.
974	*/
975	#define RT_MAKE_U32_FROM_U8(b0, b1, b2, b3) \
976	( (uint32_t)((uint8_t)(b3)) << 24 \
977	\| (uint32_t)((uint8_t)(b2)) << 16 \
978	\| (uint16_t)((uint8_t)(b1)) << 8 \
979	\| (uint8_t)(b0) )
980
981	/** @def RT_MAKE_U16
982	* Constructs a uint32_t value from two uint16_t values.
983	*/
984	#define RT_MAKE_U16(Lo, Hi) ( (uint16_t)((uint8_t)(Hi)) << 8 \| (uint8_t)(Lo) )
985
986
987	/** @def RT_H2LE_U64
988	* Converts uint64_t value from host to little endian byte order. */
989	#define RT_H2LE_U64(u64) (u64)
990
991	/** @def RT_H2LE_U32
992	* Converts uint32_t value from host to little endian byte order. */
993	#define RT_H2LE_U32(u32) (u32)
994
995	/** @def RT_H2LE_U16
996	* Converts uint16_t value from host to little endian byte order. */
997	#define RT_H2LE_U16(u16) (u16)
998
999	/** @def RT_LE2H_U64
1000	* Converts uint64_t value from little endian to host byte order. */
1001	#define RT_LE2H_U64(u64) (u64)
1002
1003	/** @def RT_LE2H_U32
1004	* Converts uint32_t value from little endian to host byte order. */
1005	#define RT_LE2H_U32(u32) (u32)
1006
1007	/** @def RT_LE2H_U16
1008	* Converts uint16_t value from little endian to host byte order. */
1009	#define RT_LE2H_U16(u16) (u16)
1010
1011
1012	/** @def RT_H2BE_U64
1013	* Converts uint64_t value from host to big endian byte order. */
1014	#define RT_H2BE_U64(u64) RT_MAKE_U64(RT_H2BE_U32((u64) >> 32), RT_H2BE_U32((u64) & 0xffffffff))
1015
1016	/** @def RT_H2BE_U32
1017	* Converts uint32_t value from host to big endian byte order. */
1018	#define RT_H2BE_U32(u32) (RT_BYTE4(u32) \| (RT_BYTE3(u32) << 8) \| (RT_BYTE2(u32) << 16) \| (RT_BYTE1(u32) << 24))
1019
1020	/** @def RT_H2BE_U16
1021	* Converts uint16_t value from host to big endian byte order. */
1022	#define RT_H2BE_U16(u16) (RT_HIBYTE(u16) \| (RT_LOBYTE(u16) << 8))
1023
1024	/** @def RT_BE2H_U64
1025	* Converts uint64_t value from big endian to host byte order. */
1026	#define RT_BE2H_U64(u64) RT_MAKE_U64(RT_H2BE_U32((u64) >> 32), RT_H2BE_U32((u64) & 0xffffffff))
1027
1028	/** @def RT_BE2H_U32
1029	* Converts uint32_t value from big endian to host byte order. */
1030	#define RT_BE2H_U32(u32) (RT_BYTE4(u32) \| (RT_BYTE3(u32) << 8) \| (RT_BYTE2(u32) << 16) \| (RT_BYTE1(u32) << 24))
1031
1032	/** @def RT_BE2H_U16
1033	* Converts uint16_t value from big endian to host byte order. */
1034	#define RT_BE2H_U16(u16) (RT_HIBYTE(u16) \| (RT_LOBYTE(u16) << 8))
1035
1036
1037	/** @def RT_H2N_U32
1038	* Converts uint32_t value from host to network byte order. */
1039	#define RT_H2N_U32(u32) RT_H2BE_U32(u32)
1040
1041	/** @def RT_H2N_U16
1042	* Converts uint16_t value from host to network byte order. */
1043	#define RT_H2N_U16(u16) RT_H2BE_U16(u16)
1044
1045	/** @def RT_N2H_U32
1046	* Converts uint32_t value from network to host byte order. */
1047	#define RT_N2H_U32(u32) RT_BE2H_U32(u32)
1048
1049	/** @def RT_N2H_U16
1050	* Converts uint16_t value from network to host byte order. */
1051	#define RT_N2H_U16(u16) RT_BE2H_U16(u16)
1052
1053
1054	/** @def RT_NO_DEPRECATED_MACROS
1055	* Define RT_NO_DEPRECATED_MACROS to not define deprecated macros.
1056	*/
1057	#ifndef RT_NO_DEPRECATED_MACROS
1058	/** @copydoc RT_ELEMENTS
1059	* @deprecated use RT_ELEMENTS. */
1060	# define ELEMENTS(aArray) RT_ELEMENTS(aArray)
1061	#endif
1062
1063
1064	/*
1065	* The BSD sys/param.h + machine/param.h file is a major source of
1066	* namespace pollution. Kill off some of the worse ones unless we're
1067	* compiling kernel code.
1068	*/
1069	#if defined(RT_OS_DARWIN) \
1070	&& !defined(KERNEL) \
1071	&& !defined(RT_NO_BSD_PARAM_H_UNDEFING) \
1072	&& ( defined(_SYS_PARAM_H_) \|\| defined(_I386_PARAM_H_) )
1073	/* sys/param.h: */
1074	# undef PSWP
1075	# undef PVM
1076	# undef PINOD
1077	# undef PRIBO
1078	# undef PVFS
1079	# undef PZERO
1080	# undef PSOCK
1081	# undef PWAIT
1082	# undef PLOCK
1083	# undef PPAUSE
1084	# undef PUSER
1085	# undef PRIMASK
1086	# undef MINBUCKET
1087	# undef MAXALLOCSAVE
1088	# undef FSHIFT
1089	# undef FSCALE
1090
1091	/* i386/machine.h: */
1092	# undef ALIGN
1093	# undef ALIGNBYTES
1094	# undef DELAY
1095	# undef STATUS_WORD
1096	# undef USERMODE
1097	# undef BASEPRI
1098	# undef MSIZE
1099	# undef CLSIZE
1100	# undef CLSIZELOG2
1101	#endif
1102
1103
1104	/** @def NULL
1105	* NULL pointer.
1106	*/
1107	#ifndef NULL
1108	# ifdef __cplusplus
1109	# define NULL 0
1110	# else
1111	# define NULL ((void*)0)
1112	# endif
1113	#endif
1114
1115	/** @def NIL_OFFSET
1116	* NIL offset.
1117	* Whenever we use offsets instead of pointers to save space and relocation effort
1118	* NIL_OFFSET shall be used as the equivalent to NULL.
1119	*/
1120	#define NIL_OFFSET (~0U)
1121
1122	/** @def NOREF
1123	* Keeps the compiler from bitching about an unused parameters.
1124	*/
1125	#define NOREF(var) (void)(var)
1126
1127	/** @def Breakpoint
1128	* Emit a debug breakpoint instruction.
1129	*
1130	* Use this for instrumenting a debugging session only!
1131	* No comitted code shall use Breakpoint().
1132	*/
1133	#ifdef __GNUC__
1134	# define Breakpoint() __asm__ __volatile__("int $3\n\t")
1135	#endif
1136	#ifdef _MSC_VER
1137	# define Breakpoint() __asm int 3
1138	#endif
1139	#if defined(__IBMC__) \|\| defined(__IBMCPP__)
1140	# define Breakpoint() __interrupt(3)
1141	#endif
1142	#ifndef Breakpoint
1143	# error "This compiler is not supported!"
1144	#endif
1145
1146
1147	/** Size Constants
1148	* (Of course, these are binary computer terms, not SI.)
1149	* @{
1150	*/
1151	/** 1 K (Kilo) (1 024). */
1152	#define _1K 0x00000400
1153	/** 4 K (Kilo) (4 096). */
1154	#define _4K 0x00001000
1155	/** 32 K (Kilo) (32 678). */
1156	#define _32K 0x00008000
1157	/** 64 K (Kilo) (65 536). */
1158	#define _64K 0x00010000
1159	/** 128 K (Kilo) (131 072). */
1160	#define _128K 0x00020000
1161	/** 256 K (Kilo) (262 144). */
1162	#define _256K 0x00040000
1163	/** 512 K (Kilo) (524 288). */
1164	#define _512K 0x00080000
1165	/** 1 M (Mega) (1 048 576). */
1166	#define _1M 0x00100000
1167	/** 2 M (Mega) (2 097 152). */
1168	#define _2M 0x00200000
1169	/** 4 M (Mega) (4 194 304). */
1170	#define _4M 0x00400000
1171	/** 1 G (Giga) (1 073 741 824). */
1172	#define _1G 0x40000000
1173	/** 2 G (Giga) (2 147 483 648). (32-bit) */
1174	#define _2G32 0x80000000U
1175	/** 2 G (Giga) (2 147 483 648). (64-bit) */
1176	#define _2G 0x0000000080000000LL
1177	/** 4 G (Giga) (4 294 967 296). */
1178	#define _4G 0x0000000100000000LL
1179	/** 1 T (Tera) (1 099 511 627 776). */
1180	#define _1T 0x0000010000000000LL
1181	/** 1 P (Peta) (1 125 899 906 842 624). */
1182	#define _1P 0x0004000000000000LL
1183	/** 1 E (Exa) (1 152 921 504 606 846 976). */
1184	#define _1E 0x1000000000000000LL
1185	/** 2 E (Exa) (2 305 843 009 213 693 952). */
1186	#define _2E 0x2000000000000000ULL
1187	/** @} */
1188
1189	/** @def VALID_PTR
1190	* Pointer validation macro.
1191	* @param ptr
1192	*/
1193	#if defined(RT_ARCH_AMD64)
1194	# ifdef IN_RING3
1195	# if defined(RT_OS_DARWIN) /* first 4GB is reserved for legacy kernel. */
1196	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) >= _4G \
1197	&& !((uintptr_t)(ptr) & 0xffff800000000000ULL) )
1198	# elif defined(RT_OS_SOLARIS) /* The kernel only used the top 2TB, but keep it simple. */
1199	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1200	&& ( ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0xffff800000000000ULL \
1201	\|\| ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0) )
1202	# else
1203	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1204	&& !((uintptr_t)(ptr) & 0xffff800000000000ULL) )
1205	# endif
1206	# else /* !IN_RING3 */
1207	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1208	&& ( ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0xffff800000000000ULL \
1209	\|\| ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0) )
1210	# endif /* !IN_RING3 */
1211	#elif defined(RT_ARCH_X86)
1212	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U )
1213	#else
1214	# error "Architecture identifier missing / not implemented."
1215	#endif
1216
1217
1218	/** @def VALID_PHYS32
1219	* 32 bits physical address validation macro.
1220	* @param Phys The RTGCPHYS address.
1221	*/
1222	#define VALID_PHYS32(Phys) ( (uint64_t)(Phys) < (uint64_t)_4G )
1223
1224	/** @def N_
1225	* The \#define N_ is used mark a string for translation. This is usable in
1226	* any part of the code, as it is only used by the tools that create message
1227	* catalogs. This macro is a no-op as far as the compiler and code generation
1228	* is concerned.
1229	*
1230	* If you want to both mark a string for translation and translate it, use _.
1231	*/
1232	#define N_(s) (s)
1233
1234	/** @def _
1235	* The \#define _ is used mark a string for translation and to translate it in
1236	* one step.
1237	*
1238	* If you want to only mark a string for translation, use N_.
1239	*/
1240	#define _(s) gettext(s)
1241
1242
1243	/** @def __PRETTY_FUNCTION__
1244	* With GNU C we'd like to use the builtin __PRETTY_FUNCTION__, so define that for the other compilers.
1245	*/
1246	#if !defined(__GNUC__) && !defined(__PRETTY_FUNCTION__)
1247	# define __PRETTY_FUNCTION__ __FUNCTION__
1248	#endif
1249
1250
1251	/** @def RT_STRICT
1252	* The \#define RT_STRICT controls whether or not assertions and other runtime checks
1253	* should be compiled in or not.
1254	*
1255	* If you want assertions which are not a subject to compile time options use
1256	* the AssertRelease*() flavors.
1257	*/
1258	#if !defined(RT_STRICT) && defined(DEBUG)
1259	# define RT_STRICT
1260	#endif
1261
1262	/** Source position. */
1263	#define RT_SRC_POS __FILE__, __LINE__, __PRETTY_FUNCTION__
1264
1265	/** Source position declaration. */
1266	#define RT_SRC_POS_DECL const char pszFile, unsigned iLine, const char pszFunction
1267
1268	/** Source position arguments. */
1269	#define RT_SRC_POS_ARGS pszFile, iLine, pszFunction
1270
1271	/** @} */
1272
1273
1274	/** @defgroup grp_rt_cdefs_cpp Special Macros for C++
1275	* @ingroup grp_rt_cdefs
1276	* @{
1277	*/
1278
1279	#ifdef __cplusplus
1280
1281	/** @def DECLEXPORT_CLASS
1282	* How to declare an exported class. Place this macro after the 'class'
1283	* keyword in the declaration of every class you want to export.
1284	*
1285	* @note It is necessary to use this macro even for inner classes declared
1286	* inside the already exported classes. This is a GCC specific requirement,
1287	* but it seems not to harm other compilers.
1288	*/
1289	#if defined(_MSC_VER) \|\| defined(RT_OS_OS2)
1290	# define DECLEXPORT_CLASS __declspec(dllexport)
1291	#else
1292	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
1293	# define DECLEXPORT_CLASS __attribute__((visibility("default")))
1294	# else
1295	# define DECLEXPORT_CLASS
1296	# endif
1297	#endif
1298
1299	/** @def DECLIMPORT_CLASS
1300	* How to declare an imported class Place this macro after the 'class'
1301	* keyword in the declaration of every class you want to export.
1302	*
1303	* @note It is necessary to use this macro even for inner classes declared
1304	* inside the already exported classes. This is a GCC specific requirement,
1305	* but it seems not to harm other compilers.
1306	*/
1307	#if defined(_MSC_VER) \|\| (defined(RT_OS_OS2) && !defined(__IBMC__) && !defined(__IBMCPP__))
1308	# define DECLIMPORT_CLASS __declspec(dllimport)
1309	#else
1310	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
1311	# define DECLIMPORT_CLASS __attribute__((visibility("default")))
1312	# else
1313	# define DECLIMPORT_CLASS
1314	# endif
1315	#endif
1316
1317	/** @def WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP
1318	* Macro to work around error C2593 of the not-so-smart MSVC 7.x ambiguity
1319	* resolver. The following snippet clearly demonstrates the code causing this
1320	* error:
1321	* @code
1322	* class A
1323	* {
1324	* public:
1325	* operator bool() const { return false; }
1326	* operator int*() const { return NULL; }
1327	* };
1328	* int main()
1329	* {
1330	* A a;
1331	* if (!a);
1332	* if (a && 0);
1333	* return 0;
1334	* }
1335	* @endcode
1336	* The code itself seems pretty valid to me and GCC thinks the same.
1337	*
1338	* This macro fixes the compiler error by explicitly overloading implicit
1339	* global operators !, && and \|\| that take the given class instance as one of
1340	* their arguments.
1341	*
1342	* The best is to use this macro right after the class declaration.
1343	*
1344	* @note The macro expands to nothing for compilers other than MSVC.
1345	*
1346	* @param Cls Class to apply the workaround to
1347	*/
1348	#if defined(_MSC_VER)
1349	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP(Cls) \
1350	inline bool operator! (const Cls &that) { return !bool (that); } \
1351	inline bool operator&& (const Cls &that, bool b) { return bool (that) && b; } \
1352	inline bool operator\|\| (const Cls &that, bool b) { return bool (that) \|\| b; } \
1353	inline bool operator&& (bool b, const Cls &that) { return b && bool (that); } \
1354	inline bool operator\|\| (bool b, const Cls &that) { return b \|\| bool (that); }
1355	#else
1356	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP(Cls)
1357	#endif
1358
1359	/** @def WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL
1360	* Version of WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP for template classes.
1361	*
1362	* @param Tpl Name of the template class to apply the workaround to
1363	* @param ArgsDecl arguments of the template, as declared in \|<>\| after the
1364	* \|template\| keyword, including \|<>\|
1365	* @param Args arguments of the template, as specified in \|<>\| after the
1366	* template class name when using the, including \|<>\|
1367	*
1368	* Example:
1369	* @code
1370	* // template class declaration
1371	* template <class C>
1372	* class Foo { ... };
1373	* // applied workaround
1374	* WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL (Foo, <class C>, <C>)
1375	* @endcode
1376	*/
1377	#if defined(_MSC_VER)
1378	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL(Tpl, ArgsDecl, Args) \
1379	template ArgsDecl \
1380	inline bool operator! (const Tpl Args &that) { return !bool (that); } \
1381	template ArgsDecl \
1382	inline bool operator&& (const Tpl Args &that, bool b) { return bool (that) && b; } \
1383	template ArgsDecl \
1384	inline bool operator\|\| (const Tpl Args &that, bool b) { return bool (that) \|\| b; } \
1385	template ArgsDecl \
1386	inline bool operator&& (bool b, const Tpl Args &that) { return b && bool (that); } \
1387	template ArgsDecl \
1388	inline bool operator\|\| (bool b, const Tpl Args &that) { return b \|\| bool (that); }
1389	#else
1390	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL(Tpl, ArgsDecl, Args)
1391	#endif
1392
1393
1394	/** @def DECLARE_CLS_COPY_CTOR_ASSIGN_NOOP
1395	* Declares the copy constructor and the assignment operation as inlined no-ops
1396	* (non-existent functions) for the given class. Use this macro inside the
1397	* private section if you want to effectively disable these operations for your
1398	* class.
1399	*
1400	* @param Cls class name to declare for
1401	*/
1402
1403	#define DECLARE_CLS_COPY_CTOR_ASSIGN_NOOP(Cls) \
1404	inline Cls (const Cls &); \
1405	inline Cls &operator= (const Cls &);
1406
1407
1408	/** @def DECLARE_CLS_NEW_DELETE_NOOP
1409	* Declares the new and delete operations as no-ops (non-existent functions)
1410	* for the given class. Use this macro inside the private section if you want
1411	* to effectively limit creating class instances on the stack only.
1412	*
1413	* @note The destructor of the given class must not be virtual, otherwise a
1414	* compile time error will occur. Note that this is not a drawback: having
1415	* the virtual destructor for a stack-based class is absolutely useless
1416	* (the real class of the stack-based instance is always known to the compiler
1417	* at compile time, so it will always call the correct destructor).
1418	*
1419	* @param Cls class name to declare for
1420	*/
1421	#define DECLARE_CLS_NEW_DELETE_NOOP(Cls) \
1422	inline static void *operator new (size_t); \
1423	inline static void operator delete (void *);
1424
1425	#endif /* defined(__cplusplus) */
1426
1427	/** @} */
1428
1429	#endif
1430

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