6 * This software is part of the SBCL system. See the README file for
9 * This software is derived from the CMU CL system, which was
10 * written at Carnegie Mellon University and released into the
11 * public domain. The software is in the public domain and is
12 * provided with absolutely no warranty. See the COPYING and CREDITS
13 * files for more information.
23 #define GET_FREE_POINTER() ((lispobj *)SymbolValue(ALLOCATION_POINTER))
24 #define SET_FREE_POINTER(new_value) \
25 (SetSymbolValue(ALLOCATION_POINTER,(lispobj)(new_value)))
26 #define GET_GC_TRIGGER() ((lispobj *)SymbolValue(INTERNAL_GC_TRIGGER))
27 #define SET_GC_TRIGGER(new_value) \
28 (SetSymbolValue(INTERNAL_GC_TRIGGER,(lispobj)(new_value)))
30 #define GET_FREE_POINTER() dynamic_space_free_pointer
31 #define SET_FREE_POINTER(new_value) (dynamic_space_free_pointer = (new_value))
32 #define GET_GC_TRIGGER() current_auto_gc_trigger
33 #define SET_GC_TRIGGER(new_value) \
34 clear_auto_gc_trigger(); set_auto_gc_trigger(new_value);
37 #define ALIGNED_SIZE(n) (n+lowtag_Mask) & ~lowtag_Mask
39 #if defined(WANT_CGC) || defined(GENCGC)
40 extern lispobj *alloc(int bytes);
42 static lispobj *alloc(int bytes)
46 /* Round to dual word boundary. */
47 bytes = (bytes + lowtag_Mask) & ~lowtag_Mask;
49 result = GET_FREE_POINTER();
50 SET_FREE_POINTER(result + (bytes / sizeof(lispobj)));
52 if (GET_GC_TRIGGER() && GET_FREE_POINTER() > GET_GC_TRIGGER()) {
53 SET_GC_TRIGGER((char *)GET_FREE_POINTER()
54 - (char *)DYNAMIC_SPACE_START);
61 static lispobj *alloc_unboxed(int type, int words)
65 result = alloc(ALIGNED_SIZE((1 + words) * sizeof(lispobj)));
67 *result = (lispobj) (words << type_Bits) | type;
72 static lispobj alloc_vector(int type, int length, int size)
74 struct vector *result;
76 result = (struct vector *)
77 alloc(ALIGNED_SIZE((2 + (length*size + 31) / 32) * sizeof(lispobj)));
79 result->header = type;
80 result->length = make_fixnum(length);
82 return ((lispobj)result)|type_OtherPointer;
85 lispobj alloc_cons(lispobj car, lispobj cdr)
87 struct cons *ptr = (struct cons *)alloc(ALIGNED_SIZE(sizeof(struct cons)));
92 return (lispobj)ptr | type_ListPointer;
95 lispobj alloc_number(long n)
99 if (-0x20000000 < n && n < 0x20000000)
100 return make_fixnum(n);
102 ptr = (struct bignum *)alloc_unboxed(type_Bignum, 1);
106 return (lispobj) ptr | type_OtherPointer;
110 lispobj alloc_string(char *str)
112 int len = strlen(str);
113 lispobj result = alloc_vector(type_SimpleString, len+1, 8);
114 struct vector *vec = (struct vector *)PTR(result);
116 vec->length = make_fixnum(len);
117 strcpy((char *)vec->data, str);
122 lispobj alloc_sap(void *ptr)
124 /* FIXME: It would probably be good to grep for "alpha" everywhere
125 * and replace this kind of weirdness with nicer parameterizations
126 * like N_WORDS_IN_POINTER. However, it might be hard to do this
127 * well enough to be useful without an Alpha to test on. What to do? */
129 struct sap *sap = (struct sap *)alloc_unboxed(type_Sap, 1);
131 struct sap *sap = (struct sap *)alloc_unboxed(type_Sap, 3);
135 return (lispobj) sap | type_OtherPointer;