new function: is_lisp_immediate()

[sbcl.git] / src / runtime / runtime.h

diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 5768f8a..9905632 100644 (file)
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -37,7 +37,7 @@
  * problem.. */
 #define QSHOW_SIGNALS 0
 
-#ifdef QSHOW_SIGNALS
+#if QSHOW_SIGNALS
 #define FSHOW_SIGNAL FSHOW
 #else
 #define FSHOW_SIGNAL(args)
@@ -80,12 +80,14 @@ typedef unsigned int lispobj;
 #endif
 
 static inline int
-lowtag_of(lispobj obj) {
+lowtag_of(lispobj obj)
+{
     return obj & LOWTAG_MASK;
 }
 
 static inline int
-widetag_of(lispobj obj) {
+widetag_of(lispobj obj)
+{
     return obj & WIDETAG_MASK;
 }
 
@@ -121,6 +123,21 @@ is_lisp_pointer(lispobj obj)
     return obj & 1;
 }
 
+#include "fixnump.h"
+
+/* Is the Lisp object obj something with immediate nature (e.g. a
+ * fixnum or character or unbound marker)? */
+static inline int
+is_lisp_immediate(lispobj obj)
+{
+    return (fixnump(obj)
+            || (widetag_of(obj) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+            || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
+#endif
+            || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
+}
+
 /* Convert from a lispobj with type bits to a native (ordinary
  * C/assembly) pointer to the beginning of the object. */
 static inline lispobj *
@@ -128,23 +145,41 @@ native_pointer(lispobj obj)
 {
     return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
 }
+
 /* inverse operation: create a suitably tagged lispobj from a native
- * pointer or integer.  Needs to be a macro due to the tedious C type
- * system */
-#define make_lispobj(o,low_tag) ((lispobj)(LOW_WORD(o)|low_tag))
+ * pointer or integer.*/
+static inline lispobj
+make_lispobj(void *o, int low_tag)
+{
+    return LOW_WORD(o) | low_tag;
+}
 
-/* FIXME: There seems to be no reason that make_fixnum and fixnum_value
- * can't be implemented as (possibly inline) functions. */
-#define make_fixnum(n) ((lispobj)((n)<<N_FIXNUM_TAG_BITS))
-#define fixnum_value(n) (((long)n)>>N_FIXNUM_TAG_BITS)
+static inline lispobj
+make_fixnum(long n)
+{
+    return n << N_FIXNUM_TAG_BITS;
+}
 
-/* Too bad ANSI C doesn't define "bool" as C++ does.. */
-typedef int boolean;
+static inline long
+fixnum_value(lispobj n)
+{
+    return n >> N_FIXNUM_TAG_BITS;
+}
 
-/* This only works for static symbols. */
-/* FIXME: should be called StaticSymbolFunction, right? */
-#define SymbolFunction(sym) \
-    (((struct fdefn *)(native_pointer(SymbolValue(sym,0))))->fun)
+#if defined(LISP_FEATURE_WIN32)
+/* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
+ * shlobj.h.
+ *
+ * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
+ * or get rid of our own boolean type.  If the boolean type is only used in
+ * the runtime, and never passed to Lisp, then it doesn't matter which one
+ * we use.
+ */
+#define boolean rpcndr_boolean
+#include <shlobj.h>
+#undef boolean
+#endif
+typedef int boolean;
 
 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
  * "this function never returns". This is the way that you do it