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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
729dbac3 DH |
3 | #ifndef SCM___SCM_H |
4 | #define SCM___SCM_H | |
8c494e99 | 5 | |
be90d0b6 | 6 | /* Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2006, |
921cd222 | 7 | * 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. |
8c494e99 | 8 | * |
d3cf93bc | 9 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
10 | * modify it under the terms of the GNU Lesser General Public License |
11 | * as published by the Free Software Foundation; either version 3 of | |
12 | * the License, or (at your option) any later version. | |
8c494e99 | 13 | * |
53befeb7 NJ |
14 | * This library is distributed in the hope that it will be useful, but |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
d3cf93bc NJ |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | * Lesser General Public License for more details. | |
8c494e99 | 18 | * |
d3cf93bc NJ |
19 | * You should have received a copy of the GNU Lesser General Public |
20 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | * 02110-1301 USA | |
d3cf93bc | 23 | */ |
8c494e99 | 24 | |
0f2d19dd | 25 | \f |
176067df | 26 | |
92e6989f RB |
27 | /********************************************************************** |
28 | This file is Guile's central public header. | |
29 | ||
30 | When included by other files, this file should preceed any include | |
31 | other than __scm.h. | |
32 | ||
33 | Under *NO* circumstances should new items be added to the global | |
34 | namespace (via adding #define, typedef, or similar to this file) with | |
35 | generic names. This usually means that any new names should be | |
36 | prefixed by either SCM_ or GUILE_. i.e. do *not* #define HAVE_FOO or | |
37 | SIZEOF_BAR. See configure.in, gen-scmconfig.h.in, and | |
38 | gen-scmconfig.c for examples of how to properly handle this issue. | |
39 | The main documentation is in gen-scmconfig.c. | |
40 | ||
41 | "What's the difference between _scm.h and __scm.h?" | |
176067df JB |
42 | |
43 | _scm.h is not installed; it's only visible to the libguile sources | |
92e6989f | 44 | themselves, and it includes config.h, the private config header. |
176067df JB |
45 | |
46 | __scm.h is installed, and is #included by <libguile.h>. If both | |
47 | the client and libguile need some piece of information, and it | |
48 | doesn't fit well into the header file for any particular module, it | |
92e6989f RB |
49 | should go in __scm.h. __scm.h includes scmconfig.h, the public |
50 | config header. | |
51 | **********************************************************************/ | |
52 | ||
53 | /* What did the configure script discover about the outside world? */ | |
54 | #include "libguile/scmconfig.h" | |
176067df | 55 | |
92e6989f | 56 | \f |
176067df | 57 | |
e81d98ec DH |
58 | /* {Compiler hints} |
59 | * | |
60 | * The following macros are used to provide additional information for the | |
61 | * compiler, which may help to do better error checking and code | |
62 | * optimization. A second benefit of these macros is, that they also provide | |
63 | * additional information to the developers. | |
64 | */ | |
65 | ||
553d4bf8 LC |
66 | /* Return true (non-zero) if GCC version MAJ.MIN or later is being used |
67 | * (macro taken from glibc.) */ | |
68 | #if defined __GNUC__ && defined __GNUC_MINOR__ | |
69 | # define SCM_GNUC_PREREQ(maj, min) \ | |
70 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
71 | #else | |
72 | # define SCM_GNUC_PREREQ(maj, min) 0 | |
73 | #endif | |
74 | ||
e81d98ec DH |
75 | /* The macro SCM_NORETURN indicates that a function will never return. |
76 | * Examples: | |
77 | * 1) int foo (char arg) SCM_NORETURN; | |
78 | */ | |
79 | #ifdef __GNUC__ | |
36c40440 | 80 | #define SCM_NORETURN __attribute__ ((__noreturn__)) |
e81d98ec DH |
81 | #else |
82 | #define SCM_NORETURN | |
83 | #endif | |
84 | ||
85 | /* The macro SCM_UNUSED indicates that a function, function argument or | |
86 | * variable may potentially be unused. | |
87 | * Examples: | |
88 | * 1) static int unused_function (char arg) SCM_UNUSED; | |
89 | * 2) int foo (char unused_argument SCM_UNUSED); | |
90 | * 3) int unused_variable SCM_UNUSED; | |
91 | */ | |
92 | #ifdef __GNUC__ | |
93 | #define SCM_UNUSED __attribute__ ((unused)) | |
94 | #else | |
95 | #define SCM_UNUSED | |
96 | #endif | |
97 | ||
98 | ||
9cc37597 LC |
99 | /* The SCM_EXPECT macros provide branch prediction hints to the compiler. To |
100 | * use only in places where the result of the expression under "normal" | |
101 | * circumstances is known. */ | |
553d4bf8 | 102 | #if SCM_GNUC_PREREQ (3, 0) |
9cc37597 LC |
103 | # define SCM_EXPECT __builtin_expect |
104 | #else | |
105 | # define SCM_EXPECT(_expr, _value) (_expr) | |
106 | #endif | |
107 | ||
108 | #define SCM_LIKELY(_expr) SCM_EXPECT ((_expr), 1) | |
109 | #define SCM_UNLIKELY(_expr) SCM_EXPECT ((_expr), 0) | |
110 | ||
102dbb6f | 111 | /* The SCM_INTERNAL macro makes it possible to explicitly declare a function |
442f3f20 AW |
112 | * as having "internal" linkage. However our current tack on this problem is |
113 | * to use GCC 4's -fvisibility=hidden, making functions internal by default, | |
114 | * and then SCM_API marks them for export. */ | |
115 | #define SCM_INTERNAL extern | |
102dbb6f | 116 | |
743b8872 LC |
117 | /* The SCM_DEPRECATED macro is used in declarations of deprecated functions |
118 | * or variables. Defining `SCM_BUILDING_DEPRECATED_CODE' allows deprecated | |
119 | * functions to be implemented in terms of deprecated functions, and allows | |
120 | * deprecated functions to be referred to by `scm_c_define_gsubr ()'. */ | |
553d4bf8 | 121 | #if !defined (SCM_BUILDING_DEPRECATED_CODE) && SCM_GNUC_PREREQ (3, 0) |
743b8872 LC |
122 | # define SCM_DEPRECATED SCM_API __attribute__ ((__deprecated__)) |
123 | #else | |
124 | # define SCM_DEPRECATED SCM_API | |
125 | #endif | |
126 | ||
c6054fea LC |
127 | /* The SCM_ALIGNED macro, when defined, can be used to instruct the compiler |
128 | * to honor the given alignment constraint. */ | |
5e33d0aa DM |
129 | /* Sun Studio supports alignment since Sun Studio 12 */ |
130 | #if defined __GNUC__ || (defined( __SUNPRO_C ) && (__SUNPRO_C - 0 >= 0x590)) | |
c6054fea | 131 | # define SCM_ALIGNED(x) __attribute__ ((aligned (x))) |
731dd0ce | 132 | #elif defined __INTEL_COMPILER |
c6054fea LC |
133 | # define SCM_ALIGNED(x) __declspec (align (x)) |
134 | #else | |
135 | /* Don't know how to align things. */ | |
136 | # undef SCM_ALIGNED | |
137 | #endif | |
e3401c65 LC |
138 | |
139 | /* The SCM_MALLOC macro can be used in function declarations to tell the | |
140 | * compiler that a function may be treated as if any non-NULL pointer it returns | |
141 | * cannot alias any other pointer valid when the function returns. */ | |
553d4bf8 | 142 | #if SCM_GNUC_PREREQ (3, 0) |
e3401c65 LC |
143 | # define SCM_MALLOC __attribute__ ((__malloc__)) |
144 | #else | |
145 | # define SCM_MALLOC | |
146 | #endif | |
9cc37597 LC |
147 | |
148 | \f | |
0f2d19dd | 149 | |
1174045c | 150 | /* SCM_API is a macro prepended to all function and data definitions |
442f3f20 AW |
151 | which should be exported from libguile. */ |
152 | ||
56a3dcd4 | 153 | #if defined BUILDING_LIBGUILE && defined HAVE_VISIBILITY |
442f3f20 | 154 | # define SCM_API extern __attribute__((__visibility__("default"))) |
56a3dcd4 | 155 | #elif defined BUILDING_LIBGUILE && defined _MSC_VER |
442f3f20 AW |
156 | # define SCM_API __declspec(dllexport) extern |
157 | #elif defined _MSC_VER | |
158 | # define SCM_API __declspec(dllimport) extern | |
1174045c MV |
159 | #else |
160 | # define SCM_API extern | |
161 | #endif | |
162 | ||
163 | \f | |
164 | ||
4cf77f09 AW |
165 | /* We would like gnu89 extern inline semantics, not C99 extern inline |
166 | semantics, so that we can be sure to avoid reifying definitions of | |
167 | inline functions in all compilation units, which is a possibility at | |
168 | low optimization levels, or if a user takes the address of an inline | |
169 | function. | |
170 | ||
171 | Hence the `__gnu_inline__' attribute, in accordance with: | |
172 | http://gcc.gnu.org/gcc-4.3/porting_to.html . | |
173 | ||
174 | With GCC 4.2, `__GNUC_STDC_INLINE__' is never defined (because C99 inline | |
175 | semantics are not supported), but a warning is issued in C99 mode if | |
176 | `__gnu_inline__' is not used. | |
177 | ||
178 | Apple's GCC build >5400 (since Xcode 3.0) doesn't support GNU inline in | |
179 | C99 mode and doesn't define `__GNUC_STDC_INLINE__'. Fall back to "static | |
180 | inline" in that case. */ | |
181 | ||
182 | # if (defined __GNUC__) && (!(((defined __APPLE_CC__) && (__APPLE_CC__ > 5400)) && __STDC_VERSION__ >= 199901L)) | |
183 | # if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__ == 2) | |
184 | # define SCM_C_EXTERN_INLINE \ | |
185 | extern __inline__ __attribute__ ((__gnu_inline__)) | |
186 | # else | |
187 | # define SCM_C_EXTERN_INLINE extern __inline__ | |
188 | # endif | |
189 | # endif | |
190 | ||
191 | /* SCM_INLINE is a macro prepended to all public inline function | |
192 | declarations. Implementations of those functions should also be in | |
193 | the header file, prefixed by SCM_INLINE_IMPLEMENTATION, and protected | |
194 | by SCM_CAN_INLINE and a CPP define for the C file in question, like | |
195 | SCM_INLINE_C_INCLUDING_INLINE_H. See inline.h for an example | |
196 | usage. */ | |
197 | ||
198 | #if defined SCM_IMPLEMENT_INLINES | |
199 | /* Reifying functions to a file, whether or not inlining is available. */ | |
200 | # define SCM_CAN_INLINE 0 | |
201 | # define SCM_INLINE SCM_API | |
202 | # define SCM_INLINE_IMPLEMENTATION | |
203 | #elif defined SCM_C_INLINE | |
204 | /* Declarations when inlining is available. */ | |
205 | # define SCM_CAN_INLINE 1 | |
206 | # ifdef SCM_C_EXTERN_INLINE | |
207 | # define SCM_INLINE SCM_C_EXTERN_INLINE | |
208 | # else | |
209 | /* Fall back to static inline if GNU "extern inline" is unavailable. */ | |
210 | # define SCM_INLINE static SCM_C_INLINE | |
211 | # endif | |
212 | # define SCM_INLINE_IMPLEMENTATION SCM_INLINE | |
213 | #else | |
214 | /* Declarations when inlining is not available. */ | |
215 | # define SCM_CAN_INLINE 0 | |
216 | # define SCM_INLINE SCM_API | |
217 | /* Don't define SCM_INLINE_IMPLEMENTATION; it should never be seen in | |
218 | this case. */ | |
219 | #endif | |
220 | ||
221 | \f | |
222 | ||
3a9809df DH |
223 | /* {Debugging Options} |
224 | * | |
225 | * These compile time options determine whether to include code that is only | |
226 | * useful for debugging guile itself or C level extensions to guile. The | |
227 | * common prefix for all option macros of this kind is "SCM_DEBUG_". It is | |
fce0b22d DH |
228 | * guaranteed that a macro named SCM_DEBUG_XXX is always defined (typically to |
229 | * either 0 or 1), i. e. there is no need to test for the undefined case. | |
230 | * This allows to use these definitions comfortably within code, as in the | |
231 | * following example: | |
3a9809df DH |
232 | * #define FOO do { if (SCM_DEBUG_XXX) bar(); else baz(); } while (0) |
233 | * Any sane compiler will remove the unused branch without any performance | |
234 | * penalty for the resulting code. | |
235 | * | |
236 | * Note: Some SCM_DEBUG_XXX options are not settable at configure time. | |
237 | * To change the value of such options you will have to edit this header | |
56100716 DH |
238 | * file or give suitable options to make, like: |
239 | * make all CFLAGS="-DSCM_DEBUG_XXX=1 ..." | |
3a9809df DH |
240 | */ |
241 | ||
242 | ||
c8a54c4b DH |
243 | /* The value of SCM_DEBUG determines the default for most of the not yet |
244 | * defined debugging options. This allows, for example, to enable most of the | |
245 | * debugging options by simply defining SCM_DEBUG as 1. | |
246 | */ | |
247 | #ifndef SCM_DEBUG | |
248 | #define SCM_DEBUG 0 | |
249 | #endif | |
250 | ||
46d53380 DH |
251 | /* If SCM_DEBUG_CELL_ACCESSES is set to 1, cell accesses will perform |
252 | * exhaustive parameter checking: It will be verified that cell parameters | |
253 | * actually point to a valid heap cell. Note: If this option is enabled, | |
254 | * guile will run about ten times slower than normally. | |
255 | */ | |
256 | #ifndef SCM_DEBUG_CELL_ACCESSES | |
257 | #define SCM_DEBUG_CELL_ACCESSES SCM_DEBUG | |
258 | #endif | |
259 | ||
e81d98ec DH |
260 | /* If SCM_DEBUG_PAIR_ACCESSES is set to 1, accesses to cons cells will be |
261 | * exhaustively checked. Note: If this option is enabled, guile will run | |
262 | * slower than normally. | |
263 | */ | |
264 | #ifndef SCM_DEBUG_PAIR_ACCESSES | |
265 | #define SCM_DEBUG_PAIR_ACCESSES SCM_DEBUG | |
266 | #endif | |
267 | ||
af45e3b0 DH |
268 | /* If SCM_DEBUG_REST_ARGUMENT is set to 1, functions that take rest arguments |
269 | * will check whether the rest arguments are actually passed as a proper list. | |
270 | * Otherwise, if SCM_DEBUG_REST_ARGUMENT is 0, functions that take rest | |
271 | * arguments will take it for granted that these are passed as a proper list. | |
c8a54c4b | 272 | */ |
af45e3b0 DH |
273 | #ifndef SCM_DEBUG_REST_ARGUMENT |
274 | #define SCM_DEBUG_REST_ARGUMENT SCM_DEBUG | |
3a9809df DH |
275 | #endif |
276 | ||
75917d62 AW |
277 | /* The macro SCM_DEBUG_TYPING_STRICTNESS indicates what level of type checking |
278 | * shall be performed with respect to the use of the SCM datatype. The macro | |
279 | * may be defined to one of the values 0, 1 and 2. | |
280 | * | |
281 | * A value of 0 means that there will be no compile time type checking, since | |
282 | * the SCM datatype will be declared as an integral type. This setting should | |
283 | * only be used on systems, where casting from integral types to pointers may | |
284 | * lead to loss of bit information. | |
285 | * | |
286 | * A value of 1 means that there will an intermediate level of compile time | |
287 | * type checking, since the SCM datatype will be declared as a pointer to an | |
288 | * undefined struct. This setting is the default, since it does not cost | |
289 | * anything in terms of performance or code size. | |
290 | * | |
291 | * A value of 2 provides a maximum level of compile time type checking since | |
292 | * the SCM datatype will be declared as a struct. This setting should be used | |
293 | * for _compile time_ type checking only, since the compiled result is likely | |
294 | * to be quite inefficient. The right way to make use of this option is to do | |
295 | * a 'make clean; make CFLAGS=-DSCM_DEBUG_TYPING_STRICTNESS=2', fix your | |
296 | * errors, and then do 'make clean; make'. | |
297 | */ | |
298 | #ifndef SCM_DEBUG_TYPING_STRICTNESS | |
299 | #define SCM_DEBUG_TYPING_STRICTNESS 1 | |
300 | #endif | |
301 | ||
3a9809df DH |
302 | \f |
303 | ||
8c494e99 DH |
304 | /* {Feature Options} |
305 | * | |
306 | * These compile time options determine whether code for certain features | |
307 | * should be compiled into guile. The common prefix for all option macros | |
308 | * of this kind is "SCM_ENABLE_". It is guaranteed that a macro named | |
309 | * SCM_ENABLE_XXX is defined to be either 0 or 1, i. e. there is no need to | |
310 | * test for the undefined case. This allows to use these definitions | |
311 | * comfortably within code, as in the following example: | |
312 | * #define FOO do { if (SCM_ENABLE_XXX) bar(); else baz(); } while (0) | |
313 | * Any sane compiler will remove the unused branch without any performance | |
314 | * penalty for the resulting code. | |
315 | * | |
316 | * Note: Some SCM_ENABLE_XXX options are not settable at configure time. | |
317 | * To change the value of such options you will have to edit this header | |
318 | * file or give suitable options to make, like: | |
319 | * make all CFLAGS="-DSCM_ENABLE_XXX=1 ..." | |
0f2d19dd | 320 | */ |
1be6b49c | 321 | |
8c494e99 DH |
322 | /* If SCM_ENABLE_DEPRECATED is set to 1, deprecated code will be included in |
323 | * guile, as well as some functions to issue run-time warnings about uses of | |
324 | * deprecated functions. | |
325 | */ | |
326 | #ifndef SCM_ENABLE_DEPRECATED | |
327 | #define SCM_ENABLE_DEPRECATED 0 | |
1be6b49c | 328 | #endif |
0f2d19dd | 329 | |
b971d089 | 330 | \f |
0f2d19dd | 331 | |
5c75b29f | 332 | /* {Architecture and compiler properties} |
0f2d19dd | 333 | * |
5c75b29f DH |
334 | * Guile as of today can only work on systems which fulfill at least the |
335 | * following requirements: | |
59c4bb82 DH |
336 | * |
337 | * - scm_t_bits and SCM variables have at least 32 bits. | |
5c75b29f | 338 | * Guile's type system is based on this assumption. |
59c4bb82 DH |
339 | * |
340 | * - sizeof (scm_t_bits) >= sizeof (void*) and sizeof (SCM) >= sizeof (void*) | |
341 | * Guile's type system is based on this assumption, since it must be | |
342 | * possible to store pointers to cells on the heap in scm_t_bits and SCM | |
343 | * variables. | |
344 | * | |
345 | * - sizeof (scm_t_bits) >= 4 and sizeof (scm_t_bits) is a power of 2. | |
346 | * Guile's type system is based on this assumption. In particular, it is | |
347 | * assumed that cells, i. e. pairs of scm_t_bits variables, are eight | |
348 | * character aligned. This is because three bits of a scm_t_bits variable | |
349 | * that is holding a pointer to a cell on the heap must be available for | |
350 | * storing type data. | |
351 | * | |
352 | * - sizeof (scm_t_bits) <= sizeof (void*) and sizeof (SCM) <= sizeof (void*) | |
353 | * In some parts of guile, scm_t_bits and SCM variables are passed to | |
354 | * functions as void* arguments. Together with the requirement above, this | |
355 | * requires a one-to-one correspondence between the size of a void* and the | |
356 | * sizes of scm_t_bits and SCM variables. | |
357 | * | |
5c75b29f DH |
358 | * - numbers are encoded using two's complement. |
359 | * The implementation of the bitwise scheme level operations is based on | |
360 | * this assumption. | |
59c4bb82 | 361 | * |
5c75b29f | 362 | * - ... add more |
0f2d19dd JB |
363 | */ |
364 | ||
5c75b29f DH |
365 | #ifdef CHAR_BIT |
366 | # define SCM_CHAR_BIT CHAR_BIT | |
367 | #else | |
368 | # define SCM_CHAR_BIT 8 | |
369 | #endif | |
370 | ||
371 | #ifdef LONG_BIT | |
372 | # define SCM_LONG_BIT LONG_BIT | |
373 | #else | |
6db7ee7b | 374 | # define SCM_LONG_BIT (SCM_SIZEOF_LONG * 8) |
5c75b29f DH |
375 | #endif |
376 | ||
e88d45aa MV |
377 | #define SCM_I_UTYPE_MAX(type) ((type)-1) |
378 | #define SCM_I_TYPE_MAX(type,umax) ((type)((umax)/2)) | |
379 | #define SCM_I_TYPE_MIN(type,umax) (-((type)((umax)/2))-1) | |
380 | ||
381 | #define SCM_T_UINT8_MAX SCM_I_UTYPE_MAX(scm_t_uint8) | |
382 | #define SCM_T_INT8_MIN SCM_I_TYPE_MIN(scm_t_int8,SCM_T_UINT8_MAX) | |
383 | #define SCM_T_INT8_MAX SCM_I_TYPE_MAX(scm_t_int8,SCM_T_UINT8_MAX) | |
384 | ||
385 | #define SCM_T_UINT16_MAX SCM_I_UTYPE_MAX(scm_t_uint16) | |
386 | #define SCM_T_INT16_MIN SCM_I_TYPE_MIN(scm_t_int16,SCM_T_UINT16_MAX) | |
387 | #define SCM_T_INT16_MAX SCM_I_TYPE_MAX(scm_t_int16,SCM_T_UINT16_MAX) | |
388 | ||
389 | #define SCM_T_UINT32_MAX SCM_I_UTYPE_MAX(scm_t_uint32) | |
390 | #define SCM_T_INT32_MIN SCM_I_TYPE_MIN(scm_t_int32,SCM_T_UINT32_MAX) | |
391 | #define SCM_T_INT32_MAX SCM_I_TYPE_MAX(scm_t_int32,SCM_T_UINT32_MAX) | |
392 | ||
e88d45aa MV |
393 | #define SCM_T_UINT64_MAX SCM_I_UTYPE_MAX(scm_t_uint64) |
394 | #define SCM_T_INT64_MIN SCM_I_TYPE_MIN(scm_t_int64,SCM_T_UINT64_MAX) | |
395 | #define SCM_T_INT64_MAX SCM_I_TYPE_MAX(scm_t_int64,SCM_T_UINT64_MAX) | |
e88d45aa | 396 | |
e88d45aa MV |
397 | #define SCM_T_UINTMAX_MAX SCM_I_UTYPE_MAX(scm_t_uintmax) |
398 | #define SCM_T_INTMAX_MIN SCM_I_TYPE_MIN(scm_t_intmax,SCM_T_UINTMAX_MAX) | |
399 | #define SCM_T_INTMAX_MAX SCM_I_TYPE_MAX(scm_t_intmax,SCM_T_UINTMAX_MAX) | |
400 | ||
114bc68a LC |
401 | #define SCM_T_UINTPTR_MAX SCM_I_UTYPE_MAX(scm_t_uintptr) |
402 | #define SCM_T_INTPTR_MIN SCM_I_TYPE_MIN(scm_t_intptr,SCM_T_UINTPTR_MAX) | |
403 | #define SCM_T_INTPTR_MAX SCM_I_TYPE_MAX(scm_t_intptr,SCM_T_UINTPTR_MAX) | |
404 | ||
0f2d19dd JB |
405 | \f |
406 | ||
2a1d8241 | 407 | #include "libguile/tags.h" |
0f2d19dd | 408 | |
be90d0b6 LC |
409 | |
410 | /* The type of subrs, i.e., Scheme procedures implemented in C. Empty | |
411 | function declarators are used internally for pointers to functions of | |
412 | any arity. However, these are equivalent to `(void)' in C++, are | |
413 | obsolescent as of C99, and trigger `strict-prototypes' GCC warnings | |
414 | (bug #23681). */ | |
415 | ||
416 | #ifdef BUILDING_LIBGUILE | |
417 | typedef SCM (* scm_t_subr) (); | |
418 | #else | |
419 | typedef void *scm_t_subr; | |
420 | #endif | |
421 | ||
0f2d19dd | 422 | \f |
5c838a97 | 423 | |
04245bb7 AW |
424 | /* scm_i_jmp_buf |
425 | * | |
426 | * The corresponding SCM_I_SETJMP and SCM_I_LONGJMP are defined in the | |
427 | * _scm.h private header. | |
5c838a97 AW |
428 | */ |
429 | ||
430 | #if defined (vms) | |
04245bb7 | 431 | typedef int scm_i_jmp_buf[17]; |
5c838a97 AW |
432 | |
433 | #elif defined (_CRAY1) | |
04245bb7 | 434 | typedef int scm_i_jmp_buf[112]; |
5c838a97 AW |
435 | |
436 | #elif defined (__ia64__) | |
5c838a97 AW |
437 | # include <signal.h> |
438 | # include <ucontext.h> | |
439 | typedef struct { | |
440 | ucontext_t ctx; | |
441 | int fresh; | |
442 | } scm_i_jmp_buf; | |
5c838a97 AW |
443 | |
444 | #else | |
5c838a97 | 445 | # include <setjmp.h> |
04245bb7 | 446 | typedef jmp_buf scm_i_jmp_buf; |
5c838a97 | 447 | #endif |
0f2d19dd | 448 | |
04245bb7 AW |
449 | |
450 | \f | |
a4dbe1ac | 451 | |
3dd84ef1 | 452 | /* If stack is not longword aligned then |
0f2d19dd JB |
453 | */ |
454 | ||
455 | /* #define SHORT_ALIGN */ | |
456 | #ifdef THINK_C | |
457 | # define SHORT_ALIGN | |
458 | #endif | |
459 | #ifdef MSDOS | |
460 | # define SHORT_ALIGN | |
461 | #endif | |
462 | #ifdef atarist | |
463 | # define SHORT_ALIGN | |
464 | #endif | |
465 | ||
466 | #ifdef SHORT_ALIGN | |
467 | typedef short SCM_STACKITEM; | |
468 | #else | |
469 | typedef long SCM_STACKITEM; | |
470 | #endif | |
79f55b7c MD |
471 | |
472 | /* Cast pointer through (void *) in order to avoid compiler warnings | |
473 | when strict aliasing is enabled */ | |
474 | #define SCM_STACK_PTR(ptr) ((SCM_STACKITEM *) (void *) (ptr)) | |
0f2d19dd JB |
475 | \f |
476 | ||
f311754e AW |
477 | #ifdef BUILDING_LIBGUILE |
478 | #define SCM_TICK SCM_ASYNC_TICK | |
479 | #else | |
480 | #define SCM_TICK scm_async_tick () | |
481 | #endif | |
0f2d19dd JB |
482 | |
483 | \f | |
484 | ||
c751e5e3 GB |
485 | #ifndef SCM_MAGIC_SNARFER |
486 | /* Let these macros pass through if | |
487 | we are snarfing; thus we can tell the | |
488 | difference between the use of an actual | |
489 | number vs. the use of one of these macros -- | |
f5421cfc | 490 | actual numbers in SCM_VALIDATE_* and SCM_ASSERT |
c751e5e3 GB |
491 | constructs must match the formal argument name, |
492 | but using SCM_ARG* avoids the test */ | |
493 | ||
0f2d19dd JB |
494 | #define SCM_ARGn 0 |
495 | #define SCM_ARG1 1 | |
496 | #define SCM_ARG2 2 | |
497 | #define SCM_ARG3 3 | |
498 | #define SCM_ARG4 4 | |
499 | #define SCM_ARG5 5 | |
1146b6cd | 500 | #define SCM_ARG6 6 |
3dd84ef1 | 501 | #define SCM_ARG7 7 |
0f2d19dd | 502 | |
c751e5e3 | 503 | #endif /* SCM_MAGIC_SNARFER */ |
0f2d19dd | 504 | |
0f2d19dd JB |
505 | \f |
506 | ||
570b6821 MV |
507 | /* Define SCM_C_INLINE_KEYWORD so that it can be used as a replacement |
508 | for the "inline" keyword, expanding to nothing when "inline" is not | |
509 | available. | |
510 | */ | |
511 | ||
512 | #ifdef SCM_C_INLINE | |
513 | #define SCM_C_INLINE_KEYWORD SCM_C_INLINE | |
514 | #else | |
515 | #define SCM_C_INLINE_KEYWORD | |
516 | #endif | |
517 | ||
705edb95 LC |
518 | /* Handling thread-local storage (TLS). */ |
519 | ||
520 | #ifdef SCM_HAVE_THREAD_STORAGE_CLASS | |
521 | # define SCM_THREAD_LOCAL __thread | |
522 | #else | |
523 | # define SCM_THREAD_LOCAL | |
524 | #endif | |
525 | ||
729dbac3 | 526 | #endif /* SCM___SCM_H */ |
89e00824 ML |
527 | |
528 | /* | |
529 | Local Variables: | |
530 | c-file-style: "gnu" | |
531 | End: | |
532 | */ |