2 * This software is part of the SBCL system. See the README file for
5 * This software is derived from the CMU CL system, which was
6 * written at Carnegie Mellon University and released into the
7 * public domain. The software is in the public domain and is
8 * provided with absolutely no warranty. See the COPYING and CREDITS
9 * files for more information.
12 /* FIXME: Aren't symbols with underscore prefixes supposed to be
13 * reserved for system libraries? Perhaps rename stuff like this
14 * to names like INCLUDED_SBCL_RUNTIME_H. */
15 #ifndef _SBCL_RUNTIME_H_
16 #define _SBCL_RUNTIME_H_
18 #if defined(LISP_FEATURE_SB_THREAD)
19 #define thread_self() pthread_self()
20 #define thread_kill pthread_kill
21 #define thread_sigmask pthread_sigmask
22 #define thread_mutex_lock(l) pthread_mutex_lock(l)
23 #define thread_mutex_unlock(l) pthread_mutex_unlock(l)
25 #define thread_self() 0
26 #define thread_kill kill_safely
27 #define thread_sigmask sigprocmask
28 #define thread_mutex_lock(l) 0
29 #define thread_mutex_unlock(l) 0
32 /* Block blockable interrupts for each SHOW, if not 0. */
33 #define QSHOW_SIGNAL_SAFE 1
34 /* Enable extra-verbose low-level debugging output for signals? (You
35 * probably don't want this unless you're trying to debug very early
36 * cold boot on a new machine, or one where you've just messed up
39 * Note: It may be that doing this is fundamentally unsound, since it
40 * causes output from signal handlers, and the i/o libraries aren't
41 * necessarily reentrant. But it can still be very convenient for
42 * figuring out what's going on when you have a signal handling
44 #define QSHOW_SIGNALS 0
45 /* Enable low-level debugging output, if not zero. Defaults to enabled
46 * if QSHOW_SIGNALS, disabled otherwise. Change it to 1 if you want
47 * low-level debugging output but not the whole signal mess. */
48 #define QSHOW QSHOW_SIGNALS
52 #if QSHOW_SIGNAL_SAFE == 1 && !defined(LISP_FEATURE_WIN32)
55 extern sigset_t blockable_sigset;
59 thread_sigmask(SIG_BLOCK, &blockable_sigset, &oldset);
60 #define QSHOW_UNBLOCK thread_sigmask(SIG_SETMASK,&oldset,0);
66 #ifdef LISP_FEATURE_SB_THREAD
67 #define QSHOW_PREFIX fprintf(stderr, "%lu ", pthread_self());
79 #define SHOW(string) FSHOW((stderr, "/%s\n", string))
89 #define FSHOW_SIGNAL FSHOW
91 #define FSHOW_SIGNAL(args)
94 /* KLUDGE: These are in theory machine-dependent and OS-dependent, but
95 * in practice the "foo int" definitions work for all the machines
96 * that SBCL runs on as of 0.6.7. If we port to the Alpha or some
97 * other non-32-bit machine we'll probably need real machine-dependent
98 * and OS-dependent definitions again. */
99 /* even on alpha, int happens to be 4 bytes. long is longer. */
100 /* FIXME: these names really shouldn't reflect their length and this
101 is not quite right for some of the FFI stuff */
102 typedef unsigned long u64;
103 typedef signed long s64;
104 typedef unsigned int u32;
105 typedef signed int s32;
107 /* this is an integral type the same length as a machine pointer */
108 typedef unsigned long pointer_sized_uint_t ;
110 #include <sys/types.h>
112 #if defined(LISP_FEATURE_SB_THREAD)
114 typedef pthread_t os_thread_t;
116 typedef pid_t os_thread_t;
119 /* FIXME: we do things this way because of the alpha32 port. once
120 alpha64 has arrived, all this nastiness can go away */
121 #if 64 == N_WORD_BITS
122 #define LOW_WORD(c) ((pointer_sized_uint_t)c)
123 #define OBJ_FMTX "lx"
124 typedef unsigned long lispobj;
127 #define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
128 /* fake it on alpha32 */
129 typedef unsigned int lispobj;
133 lowtag_of(lispobj obj)
135 return obj & LOWTAG_MASK;
139 widetag_of(lispobj obj)
141 return obj & WIDETAG_MASK;
144 static inline unsigned long
145 HeaderValue(lispobj obj)
147 return obj >> N_WIDETAG_BITS;
150 static inline struct cons *
153 return (struct cons *)(obj - LIST_POINTER_LOWTAG);
156 static inline struct symbol *
159 return (struct symbol *)(obj - OTHER_POINTER_LOWTAG);
162 static inline struct fdefn *
165 return (struct fdefn *)(obj - OTHER_POINTER_LOWTAG);
168 /* Is the Lisp object obj something with pointer nature (as opposed to
169 * e.g. a fixnum or character or unbound marker)? */
171 is_lisp_pointer(lispobj obj)
173 #if N_WORD_BITS == 64
174 return (obj & 3) == 3;
182 /* Is the Lisp object obj something with immediate nature (e.g. a
183 * fixnum or character or unbound marker)? */
185 is_lisp_immediate(lispobj obj)
188 || (widetag_of(obj) == CHARACTER_WIDETAG)
189 #if N_WORD_BITS == 64
190 || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
192 || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
195 /* Convert from a lispobj with type bits to a native (ordinary
196 * C/assembly) pointer to the beginning of the object. */
197 static inline lispobj *
198 native_pointer(lispobj obj)
200 return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
203 /* inverse operation: create a suitably tagged lispobj from a native
204 * pointer or integer.*/
205 static inline lispobj
206 make_lispobj(void *o, int low_tag)
208 return LOW_WORD(o) | low_tag;
211 #define MAKE_FIXNUM(n) (n << N_FIXNUM_TAG_BITS)
212 static inline lispobj
215 return MAKE_FIXNUM(n);
219 fixnum_value(lispobj n)
221 return n >> N_FIXNUM_TAG_BITS;
224 #if defined(LISP_FEATURE_WIN32)
225 /* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
228 * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
229 * or get rid of our own boolean type. If the boolean type is only used in
230 * the runtime, and never passed to Lisp, then it doesn't matter which one
233 #define boolean rpcndr_boolean
239 static inline boolean
240 other_immediate_lowtag_p(lispobj header)
242 /* These lowtags are spaced 4 apart throughout the lowtag space. */
243 return (lowtag_of(header) & 3) == OTHER_IMMEDIATE_0_LOWTAG;
246 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
247 * "this function never returns". This is the way that you do it
248 * in GCC later than version 2.5 or so. */
249 #if defined(__GNUC__)
250 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
251 #define never_returns __attribute__ ((noreturn))
253 #define never_returns
256 #define never_returns
259 extern void *successful_malloc (size_t size);
260 extern char *copied_string (char *string);
262 #endif /* _SBCL_RUNTIME_H_ */