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 #if defined(LISP_FEATURE_SB_SAFEPOINT)
35 int check_pending_interrupts();
38 /* Block blockable interrupts for each SHOW, if not 0. */
39 #define QSHOW_SIGNAL_SAFE 1
40 /* Enable extra-verbose low-level debugging output for signals? (You
41 * probably don't want this unless you're trying to debug very early
42 * cold boot on a new machine, or one where you've just messed up
45 * Note: It may be that doing this is fundamentally unsound, since it
46 * causes output from signal handlers, and the i/o libraries aren't
47 * necessarily reentrant. But it can still be very convenient for
48 * figuring out what's going on when you have a signal handling
50 #define QSHOW_SIGNALS 0
51 /* Enable low-level debugging output, if not zero. Defaults to enabled
52 * if QSHOW_SIGNALS, disabled otherwise. Change it to 1 if you want
53 * low-level debugging output but not the whole signal mess. */
54 #define QSHOW QSHOW_SIGNALS
58 #if QSHOW_SIGNAL_SAFE == 1 && !defined(LISP_FEATURE_WIN32)
61 extern sigset_t blockable_sigset;
65 thread_sigmask(SIG_BLOCK, &blockable_sigset, &oldset);
66 #define QSHOW_UNBLOCK thread_sigmask(SIG_SETMASK,&oldset,0);
72 #ifdef LISP_FEATURE_SB_THREAD
73 #define QSHOW_PREFIX fprintf(stderr, "%p ", pthread_self());
85 #define SHOW(string) FSHOW((stderr, "/%s\n", string))
95 #define FSHOW_SIGNAL FSHOW
97 #define FSHOW_SIGNAL(args)
100 /* KLUDGE: These are in theory machine-dependent and OS-dependent, but
101 * in practice the "foo int" definitions work for all the machines
102 * that SBCL runs on as of 0.6.7. If we port to the Alpha or some
103 * other non-32-bit machine we'll probably need real machine-dependent
104 * and OS-dependent definitions again. */
105 /* even on alpha, int happens to be 4 bytes. long is longer. */
106 /* FIXME: these names really shouldn't reflect their length and this
107 is not quite right for some of the FFI stuff */
108 typedef unsigned long u64;
109 typedef signed long s64;
110 typedef unsigned int u32;
111 typedef signed int s32;
113 /* this is an integral type the same length as a machine pointer */
114 typedef unsigned long pointer_sized_uint_t ;
116 #include <sys/types.h>
118 #if defined(LISP_FEATURE_SB_THREAD)
120 typedef pthread_t os_thread_t;
122 typedef pid_t os_thread_t;
125 /* FIXME: we do things this way because of the alpha32 port. once
126 alpha64 has arrived, all this nastiness can go away */
127 #if 64 == N_WORD_BITS
128 #define LOW_WORD(c) ((pointer_sized_uint_t)c)
129 #define OBJ_FMTX "lx"
130 typedef unsigned long lispobj;
133 #define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
134 /* fake it on alpha32 */
135 typedef unsigned int lispobj;
139 lowtag_of(lispobj obj)
141 return obj & LOWTAG_MASK;
145 widetag_of(lispobj obj)
147 return obj & WIDETAG_MASK;
150 static inline unsigned long
151 HeaderValue(lispobj obj)
153 return obj >> N_WIDETAG_BITS;
156 static inline struct cons *
159 return (struct cons *)(obj - LIST_POINTER_LOWTAG);
162 static inline struct symbol *
165 return (struct symbol *)(obj - OTHER_POINTER_LOWTAG);
168 static inline struct fdefn *
171 return (struct fdefn *)(obj - OTHER_POINTER_LOWTAG);
174 /* Is the Lisp object obj something with pointer nature (as opposed to
175 * e.g. a fixnum or character or unbound marker)? */
177 is_lisp_pointer(lispobj obj)
179 #if N_WORD_BITS == 64
180 return (obj & 3) == 3;
188 /* Is the Lisp object obj something with immediate nature (e.g. a
189 * fixnum or character or unbound marker)? */
191 is_lisp_immediate(lispobj obj)
194 || (widetag_of(obj) == CHARACTER_WIDETAG)
195 #if N_WORD_BITS == 64
196 || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
198 || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
201 /* Convert from a lispobj with type bits to a native (ordinary
202 * C/assembly) pointer to the beginning of the object. */
203 static inline lispobj *
204 native_pointer(lispobj obj)
206 return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
209 /* inverse operation: create a suitably tagged lispobj from a native
210 * pointer or integer.*/
211 static inline lispobj
212 make_lispobj(void *o, int low_tag)
214 return LOW_WORD(o) | low_tag;
217 #define MAKE_FIXNUM(n) (n << N_FIXNUM_TAG_BITS)
218 static inline lispobj
221 return MAKE_FIXNUM(n);
225 fixnum_value(lispobj n)
227 return n >> N_FIXNUM_TAG_BITS;
230 #if defined(LISP_FEATURE_WIN32)
231 /* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
234 * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
235 * or get rid of our own boolean type. If the boolean type is only used in
236 * the runtime, and never passed to Lisp, then it doesn't matter which one
239 #define boolean rpcndr_boolean
245 static inline boolean
246 other_immediate_lowtag_p(lispobj header)
248 /* These lowtags are spaced 4 apart throughout the lowtag space. */
249 return (lowtag_of(header) & 3) == OTHER_IMMEDIATE_0_LOWTAG;
252 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
253 * "this function never returns". This is the way that you do it
254 * in GCC later than version 2.5 or so. */
255 #if defined(__GNUC__)
256 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)
257 #define never_returns __attribute__ ((noreturn))
259 #define never_returns
262 #define never_returns
265 extern void *successful_malloc (size_t size);
266 extern char *copied_string (char *string);
268 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_SAFEPOINT)
269 # define THREADS_USING_GCSIGNAL 1
272 #endif /* _SBCL_RUNTIME_H_ */