cdefs.h@ 8245

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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 architechture 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 R3_ARCH_BITS
180	* Defines the host ring-3 architechture bit count.
181	*/
182	#if !defined(R3_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
183	# ifdef IN_RING3
184	# define R3_ARCH_BITS ARCH_BITS
185	# else
186	# define R3_ARCH_BITS HC_ARCH_BITS
187	# endif
188	#endif
189
190	/** @def R0_ARCH_BITS
191	* Defines the host ring-0 architechture bit count.
192	*/
193	#if !defined(R0_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
194	# ifdef IN_RING0
195	# define R0_ARCH_BITS ARCH_BITS
196	# else
197	# define R0_ARCH_BITS HC_ARCH_BITS
198	# endif
199	#endif
200
201	/** @def GC_ARCH_BITS
202	* Defines the guest architechture bit count.
203	*/
204	#if !defined(GC_ARCH_BITS) \|\| defined(DOXYGEN_RUNNING)
205	# ifdef IN_GC
206	# define GC_ARCH_BITS ARCH_BITS
207	# else
208	# define GC_ARCH_BITS 32
209	# endif
210	#endif
211
212
213	/** @def CTXTYPE
214	* Declare a type differently in GC, R3 and R0.
215	*
216	* @param GCType The GC type.
217	* @param R3Type The R3 type.
218	* @param R0Type The R0 type.
219	* @remark For pointers used only in one context use GCPTRTYPE(), R3R0PTRTYPE(), R3PTRTYPE() or R0PTRTYPE().
220	*/
221	#ifdef IN_GC
222	# define CTXTYPE(GCType, R3Type, R0Type) GCType
223	#elif defined(IN_RING3)
224	# define CTXTYPE(GCType, R3Type, R0Type) R3Type
225	#else
226	# define CTXTYPE(GCType, R3Type, R0Type) R0Type
227	#endif
228
229	/** @def GCTYPE
230	* Declare a type differently in GC and HC.
231	*
232	* @param GCType The GC type.
233	* @param HCType The HC type.
234	* @remark For pointers used only in one context use GCPTRTYPE(), R3R0PTRTYPE(), R3PTRTYPE() or R0PTRTYPE().
235	*/
236	#define GCTYPE(GCType, HCType) CTXTYPE(GCType, HCType, HCType)
237
238	/** @def GCPTRTYPE
239	* Declare a pointer which is used in GC but appears in structure(s) used by
240	* both HC and GC. The main purpose is to make sure structures have the same
241	* size when built for different architectures.
242	*
243	* @param GCType The GC type.
244	*/
245	#define GCPTRTYPE(GCType) CTXTYPE(GCType, RTGCPTR, RTGCPTR)
246
247	/** @def R3R0PTRTYPE
248	* Declare a pointer which is used in HC, is explicitely valid in ring 3 and 0,
249	* but appears in structure(s) used by both HC and GC. The main purpose is to
250	* make sure structures have the same size when built for different architectures.
251	*
252	* @param R3R0Type The R3R0 type.
253	* @remarks This used to be called HCPTRTYPE.
254	*/
255	#define R3R0PTRTYPE(R3R0Type) CTXTYPE(RTHCPTR, R3R0Type, R3R0Type)
256
257	/** @def R3PTRTYPE
258	* Declare a pointer which is used in R3 but appears in structure(s) used by
259	* both HC and GC. The main purpose is to make sure structures have the same
260	* size when built for different architectures.
261	*
262	* @param R3Type The R3 type.
263	*/
264	#define R3PTRTYPE(R3Type) CTXTYPE(RTHCUINTPTR, R3Type, RTHCUINTPTR)
265
266	/** @def R0PTRTYPE
267	* Declare a pointer which is used in R0 but appears in structure(s) used by
268	* both HC and GC. The main purpose is to make sure structures have the same
269	* size when built for different architectures.
270	*
271	* @param R0Type The R0 type.
272	*/
273	#define R0PTRTYPE(R0Type) CTXTYPE(RTHCUINTPTR, RTHCUINTPTR, R0Type)
274
275	/** @def CTXSUFF
276	* Adds the suffix of the current context to the passed in
277	* identifier name. The suffix is HC or GC.
278	*
279	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
280	* @param var Identifier name.
281	*/
282	/** @def OTHERCTXSUFF
283	* Adds the suffix of the other context to the passed in
284	* identifier name. The suffix is HC or GC.
285	*
286	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
287	* @param var Identifier name.
288	*/
289	#ifdef IN_GC
290	# define CTXSUFF(var) var##GC
291	# define OTHERCTXSUFF(var) var##HC
292	#else
293	# define CTXSUFF(var) var##HC
294	# define OTHERCTXSUFF(var) var##GC
295	#endif
296
297	/** @def CTXALLSUFF
298	* Adds the suffix of the current context to the passed in
299	* identifier name. The suffix is R3, R0 or GC.
300	*
301	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
302	* @param var Identifier name.
303	*/
304	#ifdef IN_GC
305	# define CTXALLSUFF(var) var##GC
306	#elif defined(IN_RING0)
307	# define CTXALLSUFF(var) var##R0
308	#else
309	# define CTXALLSUFF(var) var##R3
310	#endif
311
312	/** @def CTXMID
313	* Adds the current context as a middle name of an identifier name
314	* The middle name is HC or GC.
315	*
316	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
317	* @param first First name.
318	* @param last Surname.
319	*/
320	/** @def OTHERCTXMID
321	* Adds the other context as a middle name of an identifier name
322	* The middle name is HC or GC.
323	*
324	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
325	* @param first First name.
326	* @param last Surname.
327	*/
328	#ifdef IN_GC
329	# define CTXMID(first, last) first##GC##last
330	# define OTHERCTXMID(first, last) first##HC##last
331	#else
332	# define CTXMID(first, last) first##HC##last
333	# define OTHERCTXMID(first, last) first##GC##last
334	#endif
335
336	/** @def CTXALLMID
337	* Adds the current context as a middle name of an identifier name
338	* The middle name is R3, R0 or GC.
339	*
340	* This is macro should only be used in shared code to avoid a forrest of ifdefs.
341	* @param first First name.
342	* @param last Surname.
343	*/
344	#ifdef IN_GC
345	# define CTXALLMID(first, last) first##GC##last
346	#elif defined(IN_RING0)
347	# define CTXALLMID(first, last) first##R0##last
348	#else
349	# define CTXALLMID(first, last) first##R3##last
350	#endif
351
352
353	/** @def R3STRING
354	* A macro which in GC and R0 will return a dummy string while in R3 it will return
355	* the parameter.
356	*
357	* This is typically used to wrap description strings in structures shared
358	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_RING3 mess.
359	*
360	* @param pR3String The R3 string. Only referenced in R3.
361	* @see R0STRING and GCSTRING
362	*/
363	#ifdef IN_RING3
364	# define R3STRING(pR3String) (pR3String)
365	#else
366	# define R3STRING(pR3String) ("<R3_STRING>")
367	#endif
368
369	/** @def R0STRING
370	* A macro which in GC and R3 will return a dummy string while in R0 it will return
371	* the parameter.
372	*
373	* This is typically used to wrap description strings in structures shared
374	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_RING0 mess.
375	*
376	* @param pR0String The R0 string. Only referenced in R0.
377	* @see R3STRING and GCSTRING
378	*/
379	#ifdef IN_RING0
380	# define R0STRING(pR0String) (pR0String)
381	#else
382	# define R0STRING(pR0String) ("<R0_STRING>")
383	#endif
384
385	/** @def GCSTRING
386	* A macro which in R3 and R0 will return a dummy string while in GC it will return
387	* the parameter.
388	*
389	* This is typically used to wrap description strings in structures shared
390	* between R3, R0 and/or GC. The intention is to avoid the \#ifdef IN_GC mess.
391	*
392	* @param pR0String The GC string. Only referenced in GC.
393	* @see R3STRING, R0STRING
394	*/
395	#ifdef IN_GC
396	# define GCSTRING(pR0String) (pGCString)
397	#else
398	# define GCSTRING(pR0String) ("<GC_STRING>")
399	#endif
400
401	/** @def HCSTRING
402	* Macro which in GC will return a dummy string while in HC will return
403	* the parameter.
404	*
405	* This is typically used to wrap description strings in structures shared
406	* between HC and GC. The intention is to avoid the \#ifdef IN_GC kludge.
407	*
408	* @param pHCString The HC string. Only referenced in HC.
409	* @deprecated Use R3STRING or R0STRING instead.
410	*/
411	#ifdef IN_GC
412	# define HCSTRING(pHCString) ("<HC_STRING>")
413	#else
414	# define HCSTRING(pHCString) (pHCString)
415	#endif
416
417
418	/** @def RTCALL
419	* The standard calling convention for the Runtime interfaces.
420	*/
421	#ifdef _MSC_VER
422	# define RTCALL __cdecl
423	#elif defined(__GNUC__) && defined(IN_RING0) && !(defined(RT_OS_OS2) \|\| defined(RT_ARCH_AMD64)) /* the latter is kernel/gcc */
424	# define RTCALL __attribute__((cdecl,regparm(0)))
425	#else
426	# define RTCALL
427	#endif
428
429	/** @def DECLEXPORT
430	* How to declare an exported function.
431	* @param type The return type of the function declaration.
432	*/
433	#if defined(_MSC_VER) \|\| defined(RT_OS_OS2)
434	# define DECLEXPORT(type) __declspec(dllexport) type
435	#else
436	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
437	# define DECLEXPORT(type) __attribute__((visibility("default"))) type
438	# else
439	# define DECLEXPORT(type) type
440	# endif
441	#endif
442
443	/** @def DECLIMPORT
444	* How to declare an imported function.
445	* @param type The return type of the function declaration.
446	*/
447	#if defined(_MSC_VER) \|\| (defined(RT_OS_OS2) && !defined(__IBMC__) && !defined(__IBMCPP__))
448	# define DECLIMPORT(type) __declspec(dllimport) type
449	#else
450	# define DECLIMPORT(type) type
451	#endif
452
453	/** @def DECLASM
454	* How to declare an internal assembly function.
455	* @param type The return type of the function declaration.
456	*/
457	#ifdef __cplusplus
458	# ifdef _MSC_VER
459	# define DECLASM(type) extern "C" type __cdecl
460	# else
461	# define DECLASM(type) extern "C" type
462	# endif
463	#else
464	# ifdef _MSC_VER
465	# define DECLASM(type) type __cdecl
466	# else
467	# define DECLASM(type) type
468	# endif
469	#endif
470
471	/** @def DECLASMTYPE
472	* How to declare an internal assembly function type.
473	* @param type The return type of the function.
474	*/
475	#ifdef _MSC_VER
476	# define DECLASMTYPE(type) type __cdecl
477	#else
478	# define DECLASMTYPE(type) type
479	#endif
480
481	/** @def DECLNORETURN
482	* How to declare a function which does not return.
483	* @note: This macro can be combined with other macros, for example
484	* @code
485	* EMR3DECL(DECLNORETURN(void)) foo(void);
486	* @endcode
487	*/
488	#ifdef _MSC_VER
489	# define DECLNORETURN(type) __declspec(noreturn) type
490	#elif defined(__GNUC__)
491	# define DECLNORETURN(type) __attribute__((noreturn)) type
492	#else
493	# define DECLNORETURN(type) type
494	#endif
495
496	/** @def DECLCALLBACK
497	* How to declare an call back function type.
498	* @param type The return type of the function declaration.
499	*/
500	#define DECLCALLBACK(type) type RTCALL
501
502	/** @def DECLCALLBACKPTR
503	* How to declare an call back function pointer.
504	* @param type The return type of the function declaration.
505	* @param name The name of the variable member.
506	*/
507	#define DECLCALLBACKPTR(type, name) type (RTCALL * name)
508
509	/** @def DECLCALLBACKMEMBER
510	* How to declare an call back function pointer member.
511	* @param type The return type of the function declaration.
512	* @param name The name of the struct/union/class member.
513	*/
514	#define DECLCALLBACKMEMBER(type, name) type (RTCALL * name)
515
516	/** @def DECLR3CALLBACKMEMBER
517	* How to declare an call back function pointer member - R3 Ptr.
518	* @param type The return type of the function declaration.
519	* @param name The name of the struct/union/class member.
520	* @param args The argument list enclosed in parentheses.
521	*/
522	#ifdef IN_RING3
523	# define DECLR3CALLBACKMEMBER(type, name, args) type (RTCALL * name) args
524	#else
525	# define DECLR3CALLBACKMEMBER(type, name, args) RTR3PTR name
526	#endif
527
528	/** @def DECLGCCALLBACKMEMBER
529	* How to declare an call back function pointer member - GC Ptr.
530	* @param type The return type of the function declaration.
531	* @param name The name of the struct/union/class member.
532	* @param args The argument list enclosed in parentheses.
533	*/
534	#ifdef IN_GC
535	# define DECLGCCALLBACKMEMBER(type, name, args) type (RTCALL * name) args
536	#else
537	# define DECLGCCALLBACKMEMBER(type, name, args) RTGCPTR name
538	#endif
539
540	/** @def DECLR0CALLBACKMEMBER
541	* How to declare an call back function pointer member - R0 Ptr.
542	* @param type The return type of the function declaration.
543	* @param name The name of the struct/union/class member.
544	* @param args The argument list enclosed in parentheses.
545	*/
546	#ifdef IN_RING0
547	# define DECLR0CALLBACKMEMBER(type, name, args) type (RTCALL * name) args
548	#else
549	# define DECLR0CALLBACKMEMBER(type, name, args) RTR0PTR name
550	#endif
551
552	/** @def DECLINLINE
553	* How to declare a function as inline.
554	* @param type The return type of the function declaration.
555	* @remarks Don't use this macro on C++ methods.
556	*/
557	#ifdef __GNUC__
558	# define DECLINLINE(type) static __inline__ type
559	#elif defined(__cplusplus)
560	# define DECLINLINE(type) inline type
561	#elif defined(_MSC_VER)
562	# define DECLINLINE(type) _inline type
563	#elif defined(__IBMC__)
564	# define DECLINLINE(type) _Inline type
565	#else
566	# define DECLINLINE(type) inline type
567	#endif
568
569
570	/** @def IN_RT_R0
571	* Used to indicate whether we're inside the same link module as
572	* the HC Ring-0 Runtime Library.
573	*/
574	/** @def RTR0DECL(type)
575	* Runtime Library HC Ring-0 export or import declaration.
576	* @param type The return type of the function declaration.
577	*/
578	#ifdef IN_RT_R0
579	# define RTR0DECL(type) DECLEXPORT(type) RTCALL
580	#else
581	# define RTR0DECL(type) DECLIMPORT(type) RTCALL
582	#endif
583
584	/** @def IN_RT_R3
585	* Used to indicate whether we're inside the same link module as
586	* the HC Ring-3 Runtime Library.
587	*/
588	/** @def RTR3DECL(type)
589	* Runtime Library HC Ring-3 export or import declaration.
590	* @param type The return type of the function declaration.
591	*/
592	#ifdef IN_RT_R3
593	# define RTR3DECL(type) DECLEXPORT(type) RTCALL
594	#else
595	# define RTR3DECL(type) DECLIMPORT(type) RTCALL
596	#endif
597
598	/** @def IN_RT_GC
599	* Used to indicate whether we're inside the same link module as
600	* the GC Runtime Library.
601	*/
602	/** @def RTGCDECL(type)
603	* Runtime Library HC Ring-3 export or import declaration.
604	* @param type The return type of the function declaration.
605	*/
606	#ifdef IN_RT_GC
607	# define RTGCDECL(type) DECLEXPORT(type) RTCALL
608	#else
609	# define RTGCDECL(type) DECLIMPORT(type) RTCALL
610	#endif
611
612	/** @def RTDECL(type)
613	* Runtime Library export or import declaration.
614	* Functions declared using this macro exists in all contexts.
615	* @param type The return type of the function declaration.
616	*/
617	#if defined(IN_RT_R3) \|\| defined(IN_RT_GC) \|\| defined(IN_RT_R0)
618	# define RTDECL(type) DECLEXPORT(type) RTCALL
619	#else
620	# define RTDECL(type) DECLIMPORT(type) RTCALL
621	#endif
622
623	/** @def RTDATADECL(type)
624	* Runtime Library export or import declaration.
625	* Data 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 RTDATADECL(type) DECLEXPORT(type)
630	#else
631	# define RTDATADECL(type) DECLIMPORT(type)
632	#endif
633
634
635	/** @def RT_NOCRT
636	* Symbol name wrapper for the No-CRT bits.
637	*
638	* In order to coexist in the same process as other CRTs, we need to
639	* decorate the symbols such that they don't conflict the ones in the
640	* other CRTs. The result of such conflicts / duplicate symbols can
641	* confuse the dynamic loader on unix like systems.
642	*
643	* Define RT_WITHOUT_NOCRT_WRAPPERS to drop the wrapping.
644	* Define RT_WITHOUT_NOCRT_WRAPPER_ALIASES to drop the aliases to the
645	* wrapped names.
646	*/
647	/** @def RT_NOCRT_STR
648	* Same as RT_NOCRT only it'll return a double quoted string of the result.
649	*/
650	#ifndef RT_WITHOUT_NOCRT_WRAPPERS
651	# define RT_NOCRT(name) nocrt_ ## name
652	# define RT_NOCRT_STR(name) "nocrt_" # name
653	#else
654	# define RT_NOCRT(name) name
655	# define RT_NOCRT_STR(name) #name
656	#endif
657
658
659
660	/** @def RT_LIKELY
661	* Give the compiler a hint that an expression is very likely to hold true.
662	*
663	* Some compilers support explicit branch prediction so that the CPU backend
664	* can hint the processor and also so that code blocks can be reordered such
665	* that the predicted path sees a more linear flow, thus improving cache
666	* behaviour, etc.
667	*
668	* IPRT provides the macros RT_LIKELY() and RT_UNLIKELY() as a way to utilize
669	* this compiler feature when present.
670	*
671	* A few notes about the usage:
672	*
673	* - Generally, use RT_UNLIKELY() with error condition checks (unless you
674	* have some _strong_ reason to do otherwise, in which case document it),
675	* and/or RT_LIKELY() with success condition checks, assuming you want
676	* to optimize for the success path.
677	*
678	* - Other than that, if you don't know the likelihood of a test succeeding
679	* from empirical or other 'hard' evidence, don't make predictions unless
680	* you happen to be a Dirk Gently.
681	*
682	* - These macros are meant to be used in places that get executed a lot. It
683	* is wasteful to make predictions in code that is executed seldomly (e.g.
684	* at subsystem initialization time) as the basic block reording that this
685	* affecs can often generate larger code.
686	*
687	* - Note that RT_SUCCESS() and RT_FAILURE() already makes use of RT_LIKELY()
688	* and RT_UNLIKELY(). Should you wish for prediction free status checks,
689	* use the RT_SUCCESS_NP() and RT_FAILURE_NP() macros instead.
690	*
691	*
692	* @returns the boolean result of the expression.
693	* @param expr The expression that's very likely to be true.
694	* @see RT_UNLIKELY
695	*/
696	/** @def RT_UNLIKELY
697	* Give the compiler a hint that an expression is highly unlikely hold true.
698	*
699	* See the usage instructions give in the RT_LIKELY() docs.
700	*
701	* @returns the boolean result of the expression.
702	* @param expr The expression that's very unlikely to be true.
703	* @see RT_LIKELY
704	*/
705	#if defined(__GNUC__)
706	# if __GNUC__ >= 3
707	# define RT_LIKELY(expr) __builtin_expect(!!(expr), 1)
708	# define RT_UNLIKELY(expr) __builtin_expect(!!(expr), 0)
709	# else
710	# define RT_LIKELY(expr) (expr)
711	# define RT_UNLIKELY(expr) (expr)
712	# endif
713	#else
714	# define RT_LIKELY(expr) (expr)
715	# define RT_UNLIKELY(expr) (expr)
716	#endif
717
718
719	/** @def RT_BIT
720	* Make a bitmask for one integer sized bit.
721	* @param bit Bit number.
722	*/
723	#define RT_BIT(bit) (1U << (bit))
724
725	/** @def RT_BIT_32
726	* Make a 32-bit bitmask for one bit.
727	* @param bit Bit number.
728	*/
729	#define RT_BIT_32(bit) (UINT32_C(1) << (bit))
730
731	/** @def RT_BIT_64
732	* Make a 64-bit bitmask for one bit.
733	* @param bit Bit number.
734	*/
735	#define RT_BIT_64(bit) (UINT64_C(1) << (bit))
736
737	/** @def RT_ALIGN
738	* Align macro.
739	* @param u Value to align.
740	* @param uAlignment The alignment. Power of two!
741	*
742	* @remark Be extremely careful when using this macro with type which sizeof != sizeof int.
743	* When possible use any of the other RT_ALIGN_* macros. And when that's not
744	* possible, make 101% sure that uAlignment is specified with a right sized type.
745	*
746	* Specifying an unsigned 32-bit alignment constant with a 64-bit value will give
747	* you a 32-bit return value!
748	*
749	* In short: Don't use this macro. Use RT_ALIGN_T() instead.
750	*/
751	#define RT_ALIGN(u, uAlignment) ( ((u) + ((uAlignment) - 1)) & ~((uAlignment) - 1) )
752
753	/** @def RT_ALIGN_T
754	* Align macro.
755	* @param u Value to align.
756	* @param uAlignment The alignment. Power of two!
757	* @param type Integer type to use while aligning.
758	* @remark This macro is the prefered alignment macro, it doesn't have any of the pitfalls RT_ALIGN has.
759	*/
760	#define RT_ALIGN_T(u, uAlignment, type) ( ((type)(u) + ((uAlignment) - 1)) & ~(type)((uAlignment) - 1) )
761
762	/** @def RT_ALIGN_32
763	* Align macro for a 32-bit value.
764	* @param u32 Value to align.
765	* @param uAlignment The alignment. Power of two!
766	*/
767	#define RT_ALIGN_32(u32, uAlignment) RT_ALIGN_T(u32, uAlignment, uint32_t)
768
769	/** @def RT_ALIGN_64
770	* Align macro for a 64-bit value.
771	* @param u64 Value to align.
772	* @param uAlignment The alignment. Power of two!
773	*/
774	#define RT_ALIGN_64(u64, uAlignment) RT_ALIGN_T(u64, uAlignment, uint64_t)
775
776	/** @def RT_ALIGN_Z
777	* Align macro for size_t.
778	* @param cb Value to align.
779	* @param uAlignment The alignment. Power of two!
780	*/
781	#define RT_ALIGN_Z(cb, uAlignment) RT_ALIGN_T(cb, uAlignment, size_t)
782
783	/** @def RT_ALIGN_P
784	* Align macro for pointers.
785	* @param pv Value to align.
786	* @param uAlignment The alignment. Power of two!
787	*/
788	#define RT_ALIGN_P(pv, uAlignment) RT_ALIGN_PT(pv, uAlignment, void *)
789
790	/** @def RT_ALIGN_PT
791	* Align macro for pointers with type cast.
792	* @param u Value to align.
793	* @param uAlignment The alignment. Power of two!
794	* @param CastType The type to cast the result to.
795	*/
796	#define RT_ALIGN_PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, uintptr_t))
797
798	/** @def RT_ALIGN_R3PT
799	* Align macro for ring-3 pointers with type cast.
800	* @param u Value to align.
801	* @param uAlignment The alignment. Power of two!
802	* @param CastType The type to cast the result to.
803	*/
804	#define RT_ALIGN_R3PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTR3UINTPTR))
805
806	/** @def RT_ALIGN_R0PT
807	* Align macro for ring-0 pointers with type cast.
808	* @param u Value to align.
809	* @param uAlignment The alignment. Power of two!
810	* @param CastType The type to cast the result to.
811	*/
812	#define RT_ALIGN_R0PT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTR0UINTPTR))
813
814	/** @def RT_ALIGN_GCPT
815	* Align macro for GC pointers with type cast.
816	* @param u Value to align.
817	* @param uAlignment The alignment. Power of two!
818	* @param CastType The type to cast the result to.
819	*/
820	#define RT_ALIGN_GCPT(u, uAlignment, CastType) ((CastType)RT_ALIGN_T(u, uAlignment, RTGCUINTPTR))
821
822
823	/** @def RT_OFFSETOF
824	* Our own special offsetof() variant, returns a signed result.
825	*
826	* This differs from the usual offsetof() in that it's not relying on builtin
827	* compiler stuff and thus can use variables in arrays the structure may
828	* contain. If in this usful to determin the sizes of structures ending
829	* with a variable length field.
830	*
831	* @returns offset into the structure of the specified member. signed.
832	* @param type Structure type.
833	* @param member Member.
834	*/
835	#define RT_OFFSETOF(type, member) ( (int)(uintptr_t)&( ((type )(void )0)->member) )
836
837	/** @def RT_UOFFSETOF
838	* Our own special offsetof() variant, returns an unsigned result.
839	*
840	* This differs from the usual offsetof() in that it's not relying on builtin
841	* compiler stuff and thus can use variables in arrays the structure may
842	* contain. If in this usful to determin the sizes of structures ending
843	* with a variable length field.
844	*
845	* @returns offset into the structure of the specified member. unsigned.
846	* @param type Structure type.
847	* @param member Member.
848	*/
849	#define RT_UOFFSETOF(type, member) ( (uintptr_t)&( ((type )(void )0)->member) )
850
851	/** @def RT_SIZEOFMEMB
852	* Get the size of a structure member.
853	*
854	* @returns size of the structure member.
855	* @param type Structure type.
856	* @param member Member.
857	*/
858	#define RT_SIZEOFMEMB(type, member) ( sizeof(((type )(void )0)->member) )
859
860	/** @def RT_ELEMENTS
861	* Calcs the number of elements in an array.
862	* @returns Element count.
863	* @param aArray Array in question.
864	*/
865	#define RT_ELEMENTS(aArray) ( sizeof(aArray) / sizeof((aArray)[0]) )
866
867	#ifdef RT_OS_OS2
868	/* Undefine RT_MAX since there is an unfortunate clash with the max
869	resource type define in os2.h. */
870	# undef RT_MAX
871	#endif
872
873	/** @def RT_MAX
874	* Finds the maximum value.
875	* @returns The higher of the two.
876	* @param Value1 Value 1
877	* @param Value2 Value 2
878	*/
879	#define RT_MAX(Value1, Value2) ((Value1) >= (Value2) ? (Value1) : (Value2))
880
881	/** @def RT_MIN
882	* Finds the minimum value.
883	* @returns The lower of the two.
884	* @param Value1 Value 1
885	* @param Value2 Value 2
886	*/
887	#define RT_MIN(Value1, Value2) ((Value1) <= (Value2) ? (Value1) : (Value2))
888
889	/** @def RT_ABS
890	* Get the absolute (non-negative) value.
891	* @returns The absolute value of Value.
892	* @param Value The value.
893	*/
894	#define RT_ABS(Value) ((Value) >= 0 ? (Value) : -(Value))
895
896	/** @def RT_LOWORD
897	* Gets the low word (=uint16_t) of something. */
898	#define RT_LOWORD(a) ((a) & 0xffff)
899
900	/** @def RT_HIWORD
901	* Gets the high word (=uint16_t) of a 32 bit something. */
902	#define RT_HIWORD(a) ((a) >> 16)
903
904	/** @def RT_LOBYTE
905	* Gets the low byte of something. */
906	#define RT_LOBYTE(a) ((a) & 0xff)
907
908	/** @def RT_HIBYTE
909	* Gets the low byte of a 16 bit something. */
910	#define RT_HIBYTE(a) ((a) >> 8)
911
912	/** @def RT_BYTE1
913	* Gets first byte of something. */
914	#define RT_BYTE1(a) ((a) & 0xff)
915
916	/** @def RT_BYTE2
917	* Gets second byte of something. */
918	#define RT_BYTE2(a) (((a) >> 8) & 0xff)
919
920	/** @def RT_BYTE3
921	* Gets second byte of something. */
922	#define RT_BYTE3(a) (((a) >> 16) & 0xff)
923
924	/** @def RT_BYTE4
925	* Gets fourth byte of something. */
926	#define RT_BYTE4(a) (((a) >> 24) & 0xff)
927
928
929	/** @def RT_MAKE_U64
930	* Constructs a uint64_t value from two uint32_t values.
931	*/
932	#define RT_MAKE_U64(Lo, Hi) ( (uint64_t)((uint32_t)(Hi)) << 32 \| (uint32_t)(Lo) )
933
934	/** @def RT_MAKE_U64_FROM_U16
935	* Constructs a uint64_t value from four uint16_t values.
936	*/
937	#define RT_MAKE_U64_FROM_U16(w0, w1, w2, w3) \
938	( (uint64_t)((uint16_t)(w3)) << 48 \
939	\| (uint64_t)((uint16_t)(w2)) << 32 \
940	\| (uint32_t)((uint16_t)(w1)) << 16 \
941	\| (uint16_t)(w0) )
942
943	/** @def RT_MAKE_U64_FROM_U8
944	* Constructs a uint64_t value from eight uint8_t values.
945	*/
946	#define RT_MAKE_U64_FROM_U8(b0, b1, b2, b3, b4, b5, b6, b7) \
947	( (uint64_t)((uint8_t)(b7)) << 56 \
948	\| (uint64_t)((uint8_t)(b6)) << 48 \
949	\| (uint64_t)((uint8_t)(b5)) << 40 \
950	\| (uint64_t)((uint8_t)(b4)) << 32 \
951	\| (uint32_t)((uint8_t)(b3)) << 24 \
952	\| (uint32_t)((uint8_t)(b2)) << 16 \
953	\| (uint16_t)((uint8_t)(b1)) << 8 \
954	\| (uint8_t)(b0) )
955
956	/** @def RT_MAKE_U32
957	* Constructs a uint32_t value from two uint16_t values.
958	*/
959	#define RT_MAKE_U32(Lo, Hi) ( (uint32_t)((uint16_t)(Hi)) << 16 \| (uint16_t)(Lo) )
960
961	/** @def RT_MAKE_U32_FROM_U8
962	* Constructs a uint32_t value from four uint8_t values.
963	*/
964	#define RT_MAKE_U32_FROM_U8(b0, b1, b2, b3) \
965	( (uint32_t)((uint8_t)(b3)) << 24 \
966	\| (uint32_t)((uint8_t)(b2)) << 16 \
967	\| (uint16_t)((uint8_t)(b1)) << 8 \
968	\| (uint8_t)(b0) )
969	/** @todo remove this after uses in VUSBUrb.cpp has been corrected. */
970	#define MAKE_U32_FROM_U8(b0,b1,b2,b3) RT_MAKE_U32_FROM_U8(b0,b1,b2,b3)
971
972	/** @def RT_MAKE_U16
973	* Constructs a uint32_t value from two uint16_t values.
974	*/
975	#define RT_MAKE_U16(Lo, Hi) ( (uint16_t)((uint8_t)(Hi)) << 8 \| (uint8_t)(Lo) )
976
977
978	/** @def RT_H2LE_U64
979	* Converts uint64_t value from host to little endian byte order. */
980	#define RT_H2LE_U64(u64) (u64)
981
982	/** @def RT_H2LE_U32
983	* Converts uint32_t value from host to little endian byte order. */
984	#define RT_H2LE_U32(u32) (u32)
985
986	/** @def RT_H2LE_U16
987	* Converts uint16_t value from host to little endian byte order. */
988	#define RT_H2LE_U16(u16) (u16)
989
990	/** @def RT_LE2H_U64
991	* Converts uint64_t value from little endian to host byte order. */
992	#define RT_LE2H_U64(u64) (u64)
993
994	/** @def RT_LE2H_U32
995	* Converts uint32_t value from little endian to host byte order. */
996	#define RT_LE2H_U32(u32) (u32)
997
998	/** @def RT_LE2H_U16
999	* Converts uint16_t value from little endian to host byte order. */
1000	#define RT_LE2H_U16(u16) (u16)
1001
1002
1003	/** @def RT_H2BE_U64
1004	* Converts uint64_t value from host to big endian byte order. */
1005	#define RT_H2BE_U64(u64) RT_MAKE_U64(RT_H2BE_U32((u64) >> 32), RT_H2BE_U32((u64) & 0xffffffff))
1006
1007	/** @def RT_H2BE_U32
1008	* Converts uint32_t value from host to big endian byte order. */
1009	#define RT_H2BE_U32(u32) (RT_BYTE4(u32) \| (RT_BYTE3(u32) << 8) \| (RT_BYTE2(u32) << 16) \| (RT_BYTE1(u32) << 24))
1010
1011	/** @def RT_H2BE_U16
1012	* Converts uint16_t value from host to big endian byte order. */
1013	#define RT_H2BE_U16(u16) (RT_HIBYTE(u16) \| (RT_LOBYTE(u16) << 8))
1014
1015	/** @def RT_BE2H_U64
1016	* Converts uint64_t value from big endian to host byte order. */
1017	#define RT_BE2H_U64(u64) RT_MAKE_U64(RT_H2BE_U32((u64) >> 32), RT_H2BE_U32((u64) & 0xffffffff))
1018
1019	/** @def RT_BE2H_U32
1020	* Converts uint32_t value from big endian to host byte order. */
1021	#define RT_BE2H_U32(u32) (RT_BYTE4(u32) \| (RT_BYTE3(u32) << 8) \| (RT_BYTE2(u32) << 16) \| (RT_BYTE1(u32) << 24))
1022
1023	/** @def RT_BE2H_U16
1024	* Converts uint16_t value from big endian to host byte order. */
1025	#define RT_BE2H_U16(u16) (RT_HIBYTE(u16) \| (RT_LOBYTE(u16) << 8))
1026
1027
1028	/** @def RT_H2N_U32
1029	* Converts uint32_t value from host to network byte order. */
1030	#define RT_H2N_U32(u32) RT_H2BE_U32(u32)
1031
1032	/** @def RT_H2N_U16
1033	* Converts uint16_t value from host to network byte order. */
1034	#define RT_H2N_U16(u16) RT_H2BE_U16(u16)
1035
1036	/** @def RT_N2H_U32
1037	* Converts uint32_t value from network to host byte order. */
1038	#define RT_N2H_U32(u32) RT_BE2H_U32(u32)
1039
1040	/** @def RT_N2H_U16
1041	* Converts uint16_t value from network to host byte order. */
1042	#define RT_N2H_U16(u16) RT_BE2H_U16(u16)
1043
1044
1045	/** @def RT_NO_DEPRECATED_MACROS
1046	* Define RT_NO_DEPRECATED_MACROS to not define deprecated macros.
1047	*/
1048	#ifndef RT_NO_DEPRECATED_MACROS
1049	/** @copydoc RT_ELEMENTS
1050	* @deprecated use RT_ELEMENTS. */
1051	# define ELEMENTS(aArray) RT_ELEMENTS(aArray)
1052	#endif
1053
1054
1055	/*
1056	* The BSD sys/param.h + machine/param.h file is a major source of
1057	* namespace pollution. Kill off some of the worse ones unless we're
1058	* compiling kernel code.
1059	*/
1060	#if defined(RT_OS_DARWIN) \
1061	&& !defined(KERNEL) \
1062	&& !defined(RT_NO_BSD_PARAM_H_UNDEFING) \
1063	&& ( defined(_SYS_PARAM_H_) \|\| defined(_I386_PARAM_H_) )
1064	/* sys/param.h: */
1065	# undef PSWP
1066	# undef PVM
1067	# undef PINOD
1068	# undef PRIBO
1069	# undef PVFS
1070	# undef PZERO
1071	# undef PSOCK
1072	# undef PWAIT
1073	# undef PLOCK
1074	# undef PPAUSE
1075	# undef PUSER
1076	# undef PRIMASK
1077	# undef MINBUCKET
1078	# undef MAXALLOCSAVE
1079	# undef FSHIFT
1080	# undef FSCALE
1081
1082	/* i386/machine.h: */
1083	# undef ALIGN
1084	# undef ALIGNBYTES
1085	# undef DELAY
1086	# undef STATUS_WORD
1087	# undef USERMODE
1088	# undef BASEPRI
1089	# undef MSIZE
1090	# undef CLSIZE
1091	# undef CLSIZELOG2
1092	#endif
1093
1094
1095	/** @def NULL
1096	* NULL pointer.
1097	*/
1098	#ifndef NULL
1099	# ifdef __cplusplus
1100	# define NULL 0
1101	# else
1102	# define NULL ((void*)0)
1103	# endif
1104	#endif
1105
1106	/** @def NIL_OFFSET
1107	* NIL offset.
1108	* Whenever we use offsets instead of pointers to save space and relocation effort
1109	* NIL_OFFSET shall be used as the equivalent to NULL.
1110	*/
1111	#define NIL_OFFSET (~0U)
1112
1113	/** @def NOREF
1114	* Keeps the compiler from bitching about an unused parameters.
1115	*/
1116	#define NOREF(var) (void)(var)
1117
1118	/** @def Breakpoint
1119	* Emit a debug breakpoint instruction.
1120	*
1121	* Use this for instrumenting a debugging session only!
1122	* No comitted code shall use Breakpoint().
1123	*/
1124	#ifdef __GNUC__
1125	# define Breakpoint() __asm__ __volatile__("int $3\n\t")
1126	#endif
1127	#ifdef _MSC_VER
1128	# define Breakpoint() __asm int 3
1129	#endif
1130	#if defined(__IBMC__) \|\| defined(__IBMCPP__)
1131	# define Breakpoint() __interrupt(3)
1132	#endif
1133	#ifndef Breakpoint
1134	# error "This compiler is not supported!"
1135	#endif
1136
1137
1138	/** Size Constants
1139	* (Of course, these are binary computer terms, not SI.)
1140	* @{
1141	*/
1142	/** 1 K (Kilo) (1 024). */
1143	#define _1K 0x00000400
1144	/** 4 K (Kilo) (4 096). */
1145	#define _4K 0x00001000
1146	/** 32 K (Kilo) (32 678). */
1147	#define _32K 0x00008000
1148	/** 64 K (Kilo) (65 536). */
1149	#define _64K 0x00010000
1150	/** 128 K (Kilo) (131 072). */
1151	#define _128K 0x00020000
1152	/** 256 K (Kilo) (262 144). */
1153	#define _256K 0x00040000
1154	/** 512 K (Kilo) (524 288). */
1155	#define _512K 0x00080000
1156	/** 1 M (Mega) (1 048 576). */
1157	#define _1M 0x00100000
1158	/** 2 M (Mega) (2 097 152). */
1159	#define _2M 0x00200000
1160	/** 4 M (Mega) (4 194 304). */
1161	#define _4M 0x00400000
1162	/** 1 G (Giga) (1 073 741 824). */
1163	#define _1G 0x40000000
1164	/** 2 G (Giga) (2 147 483 648). (32-bit) */
1165	#define _2G32 0x80000000U
1166	/** 2 G (Giga) (2 147 483 648). (64-bit) */
1167	#define _2G 0x0000000080000000LL
1168	/** 4 G (Giga) (4 294 967 296). */
1169	#define _4G 0x0000000100000000LL
1170	/** 1 T (Tera) (1 099 511 627 776). */
1171	#define _1T 0x0000010000000000LL
1172	/** 1 P (Peta) (1 125 899 906 842 624). */
1173	#define _1P 0x0004000000000000LL
1174	/** 1 E (Exa) (1 152 921 504 606 846 976). */
1175	#define _1E 0x1000000000000000LL
1176	/** 2 E (Exa) (2 305 843 009 213 693 952). */
1177	#define _2E 0x2000000000000000ULL
1178	/** @} */
1179
1180	/** @def VALID_PTR
1181	* Pointer validation macro.
1182	* @param ptr
1183	*/
1184	#if defined(RT_ARCH_AMD64)
1185	# ifdef IN_RING3
1186	# if defined(RT_OS_DARWIN) /* first 4GB is reserved for legacy kernel. */
1187	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) >= _4G \
1188	&& !((uintptr_t)(ptr) & 0xffff800000000000ULL) )
1189	# elif defined(RT_OS_SOLARIS) /* The kernel only used the top 2TB, but keep it simple. */
1190	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1191	&& ( ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0xffff800000000000ULL \
1192	\|\| ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0) )
1193	# else
1194	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1195	&& !((uintptr_t)(ptr) & 0xffff800000000000ULL) )
1196	# endif
1197	# else /* !IN_RING3 */
1198	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U \
1199	&& ( ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0xffff800000000000ULL \
1200	\|\| ((uintptr_t)(ptr) & 0xffff800000000000ULL) == 0) )
1201	# endif /* !IN_RING3 */
1202	#elif defined(RT_ARCH_X86)
1203	# define VALID_PTR(ptr) ( (uintptr_t)(ptr) + 0x1000U >= 0x2000U )
1204	#else
1205	# error "Architecture identifier missing / not implemented."
1206	#endif
1207
1208
1209	/** @def VALID_PHYS32_PTR
1210	* 32 bits physical address validation macro.
1211	* @param ptr
1212	*/
1213	#define VALID_PHYS32_PTR(ptr) ( (RTGCPHYS64)(ptr) < _4G )
1214
1215	/** @def N_
1216	* The \#define N_ is used mark a string for translation. This is usable in
1217	* any part of the code, as it is only used by the tools that create message
1218	* catalogs. This macro is a no-op as far as the compiler and code generation
1219	* is concerned.
1220	*
1221	* If you want to both mark a string for translation and translate it, use _.
1222	*/
1223	#define N_(s) (s)
1224
1225	/** @def _
1226	* The \#define _ is used mark a string for translation and to translate it in
1227	* one step.
1228	*
1229	* If you want to only mark a string for translation, use N_.
1230	*/
1231	#define _(s) gettext(s)
1232
1233
1234	/** @def __PRETTY_FUNCTION__
1235	* With GNU C we'd like to use the builtin __PRETTY_FUNCTION__, so define that for the other compilers.
1236	*/
1237	#if !defined(__GNUC__) && !defined(__PRETTY_FUNCTION__)
1238	# define __PRETTY_FUNCTION__ __FUNCTION__
1239	#endif
1240
1241
1242	/** @def RT_STRICT
1243	* The \#define RT_STRICT controls whether or not assertions and other runtime checks
1244	* should be compiled in or not.
1245	*
1246	* If you want assertions which are not a subject to compile time options use
1247	* the AssertRelease*() flavors.
1248	*/
1249	#if !defined(RT_STRICT) && defined(DEBUG)
1250	# define RT_STRICT
1251	#endif
1252
1253	/** Source position. */
1254	#define RT_SRC_POS __FILE__, __LINE__, __PRETTY_FUNCTION__
1255
1256	/** Source position declaration. */
1257	#define RT_SRC_POS_DECL const char pszFile, unsigned iLine, const char pszFunction
1258
1259	/** Source position arguments. */
1260	#define RT_SRC_POS_ARGS pszFile, iLine, pszFunction
1261
1262	/** @} */
1263
1264
1265	/** @defgroup grp_rt_cdefs_cpp Special Macros for C++
1266	* @ingroup grp_rt_cdefs
1267	* @{
1268	*/
1269
1270	#ifdef __cplusplus
1271
1272	/** @def DECLEXPORT_CLASS
1273	* How to declare an exported class. Place this macro after the 'class'
1274	* keyword in the declaration of every class you want to export.
1275	*
1276	* @note It is necessary to use this macro even for inner classes declared
1277	* inside the already exported classes. This is a GCC specific requirement,
1278	* but it seems not to harm other compilers.
1279	*/
1280	#if defined(_MSC_VER) \|\| defined(RT_OS_OS2)
1281	# define DECLEXPORT_CLASS __declspec(dllexport)
1282	#else
1283	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
1284	# define DECLEXPORT_CLASS __attribute__((visibility("default")))
1285	# else
1286	# define DECLEXPORT_CLASS
1287	# endif
1288	#endif
1289
1290	/** @def DECLIMPORT_CLASS
1291	* How to declare an imported class Place this macro after the 'class'
1292	* keyword in the declaration of every class you want to export.
1293	*
1294	* @note It is necessary to use this macro even for inner classes declared
1295	* inside the already exported classes. This is a GCC specific requirement,
1296	* but it seems not to harm other compilers.
1297	*/
1298	#if defined(_MSC_VER) \|\| (defined(RT_OS_OS2) && !defined(__IBMC__) && !defined(__IBMCPP__))
1299	# define DECLIMPORT_CLASS __declspec(dllimport)
1300	#else
1301	# ifdef VBOX_HAVE_VISIBILITY_HIDDEN
1302	# define DECLIMPORT_CLASS __attribute__((visibility("default")))
1303	# else
1304	# define DECLIMPORT_CLASS
1305	# endif
1306	#endif
1307
1308	/** @def WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP
1309	* Macro to work around error C2593 of the not-so-smart MSVC 7.x ambiguity
1310	* resolver. The following snippet clearly demonstrates the code causing this
1311	* error:
1312	* @code
1313	* class A
1314	* {
1315	* public:
1316	* operator bool() const { return false; }
1317	* operator int*() const { return NULL; }
1318	* };
1319	* int main()
1320	* {
1321	* A a;
1322	* if (!a);
1323	* if (a && 0);
1324	* return 0;
1325	* }
1326	* @endcode
1327	* The code itself seems pretty valid to me and GCC thinks the same.
1328	*
1329	* This macro fixes the compiler error by explicitly overloading implicit
1330	* global operators !, && and \|\| that take the given class instance as one of
1331	* their arguments.
1332	*
1333	* The best is to use this macro right after the class declaration.
1334	*
1335	* @note The macro expands to nothing for compilers other than MSVC.
1336	*
1337	* @param Cls Class to apply the workaround to
1338	*/
1339	#if defined(_MSC_VER)
1340	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP(Cls) \
1341	inline bool operator! (const Cls &that) { return !bool (that); } \
1342	inline bool operator&& (const Cls &that, bool b) { return bool (that) && b; } \
1343	inline bool operator\|\| (const Cls &that, bool b) { return bool (that) \|\| b; } \
1344	inline bool operator&& (bool b, const Cls &that) { return b && bool (that); } \
1345	inline bool operator\|\| (bool b, const Cls &that) { return b \|\| bool (that); }
1346	#else
1347	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP(Cls)
1348	#endif
1349
1350	/** @def WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL
1351	* Version of WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP for template classes.
1352	*
1353	* @param Tpl Name of the template class to apply the workaround to
1354	* @param ArgsDecl arguments of the template, as declared in \|<>\| after the
1355	* \|template\| keyword, including \|<>\|
1356	* @param Args arguments of the template, as specified in \|<>\| after the
1357	* template class name when using the, including \|<>\|
1358	*
1359	* Example:
1360	* @code
1361	* // template class declaration
1362	* template <class C>
1363	* class Foo { ... };
1364	* // applied workaround
1365	* WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL (Foo, <class C>, <C>)
1366	* @endcode
1367	*/
1368	#if defined(_MSC_VER)
1369	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL(Tpl, ArgsDecl, Args) \
1370	template ArgsDecl \
1371	inline bool operator! (const Tpl Args &that) { return !bool (that); } \
1372	template ArgsDecl \
1373	inline bool operator&& (const Tpl Args &that, bool b) { return bool (that) && b; } \
1374	template ArgsDecl \
1375	inline bool operator\|\| (const Tpl Args &that, bool b) { return bool (that) \|\| b; } \
1376	template ArgsDecl \
1377	inline bool operator&& (bool b, const Tpl Args &that) { return b && bool (that); } \
1378	template ArgsDecl \
1379	inline bool operator\|\| (bool b, const Tpl Args &that) { return b \|\| bool (that); }
1380	#else
1381	# define WORKAROUND_MSVC7_ERROR_C2593_FOR_BOOL_OP_TPL(Tpl, ArgsDecl, Args)
1382	#endif
1383
1384
1385	/** @def DECLARE_CLS_COPY_CTOR_ASSIGN_NOOP
1386	* Declares the copy constructor and the assignment operation as inlined no-ops
1387	* (non-existent functions) for the given class. Use this macro inside the
1388	* private section if you want to effectively disable these operations for your
1389	* class.
1390	*
1391	* @param Cls class name to declare for
1392	*/
1393
1394	#define DECLARE_CLS_COPY_CTOR_ASSIGN_NOOP(Cls) \
1395	inline Cls (const Cls &); \
1396	inline Cls &operator= (const Cls &);
1397
1398
1399	/** @def DECLARE_CLS_NEW_DELETE_NOOP
1400	* Declares the new and delete operations as no-ops (non-existent functions)
1401	* for the given class. Use this macro inside the private section if you want
1402	* to effectively limit creating class instances on the stack only.
1403	*
1404	* @note The destructor of the given class must not be virtual, otherwise a
1405	* compile time error will occur. Note that this is not a drawback: having
1406	* the virtual destructor for a stack-based class is absolutely useless
1407	* (the real class of the stack-based instance is always known to the compiler
1408	* at compile time, so it will always call the correct destructor).
1409	*
1410	* @param Cls class name to declare for
1411	*/
1412	#define DECLARE_CLS_NEW_DELETE_NOOP(Cls) \
1413	inline static void *operator new (size_t); \
1414	inline static void operator delete (void *);
1415
1416	#endif /* defined(__cplusplus) */
1417
1418	/** @} */
1419
1420	#endif
1421

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