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- /* $Header: alloc.c,v 1.7 91/10/22 18:36:50 wlott Exp $ */
- #include "lisp.h"
- #include "ldb.h"
- #include "alloc.h"
- #include "globals.h"
-
- #ifdef ibmrt
- #define GET_FREE_POINTER() ((lispobj *)SymbolValue(ALLOCATION_POINTER))
- #define SET_FREE_POINTER(new_value) \
- (SetSymbolValue(ALLOCATION_POINTER,(lispobj)(new_value)))
- #define GET_GC_TRIGGER() ((lispobj *)SymbolValue(INTERNAL_GC_TRIGGER))
- #define SET_GC_TRIGGER(new_value) \
- (SetSymbolValue(INTERNAL_GC_TRIGGER,(lispobj)(new_value)))
- #else
- #define GET_FREE_POINTER() current_dynamic_space_free_pointer
- #define SET_FREE_POINTER(new_value) \
- (current_dynamic_space_free_pointer = (new_value))
- #define GET_GC_TRIGGER() current_auto_gc_trigger
- #define SET_GC_TRIGGER(new_value) \
- clear_auto_gc_trigger(); set_auto_gc_trigger(new_value);
- #endif
-
-
-
- /****************************************************************
- Allocation Routines.
- ****************************************************************/
-
- static lispobj *alloc(bytes)
- int bytes;
- {
- lispobj *result;
-
- /* Round to dual word boundry. */
- bytes = (bytes + lowtag_Mask) & ~lowtag_Mask;
-
- result = GET_FREE_POINTER();
- SET_FREE_POINTER(result + (bytes / sizeof(lispobj)));
-
- if (GET_GC_TRIGGER() && GET_FREE_POINTER() > GET_GC_TRIGGER()) {
- SET_GC_TRIGGER((char *)GET_FREE_POINTER()
- - (char *)current_dynamic_space);
- }
-
- return result;
- }
-
- lispobj *alloc_unboxed(type, words)
- int type, words;
- {
- lispobj *result;
-
- result = alloc((1 + words) * sizeof(lispobj));
-
- *result = (lispobj) (words << type_Bits) | type;
-
- return result;
- }
-
- lispobj alloc_vector(type, length, size)
- int type, length, size;
- {
- struct vector *result;
-
- result = (struct vector *)alloc((2 + (length*size + 31) / 32) * sizeof(lispobj));
-
- result->header = type;
- result->length = fixnum(length);
-
- return ((lispobj)result)|type_OtherPointer;
- }
-
- lispobj alloc_cons(car, cdr)
- lispobj car, cdr;
- {
- struct cons *ptr = (struct cons *)alloc(sizeof(struct cons));
-
- ptr->car = car;
- ptr->cdr = cdr;
-
- return (lispobj)ptr | type_ListPointer;
- }
-
- lispobj alloc_number(n)
- long n;
- {
- struct bignum *ptr;
-
- if (-0x20000000 < n && n < 0x20000000)
- return fixnum(n);
- else {
- ptr = (struct bignum *)alloc_unboxed(type_Bignum, 1);
-
- ptr->digits[0] = n;
-
- return (lispobj) ptr | type_OtherPointer;
- }
- }
-
- lispobj alloc_string(str)
- char *str;
- {
- int len = strlen(str);
- lispobj result = alloc_vector(type_SimpleString, len+1, 8);
- struct vector *vec = (struct vector *)PTR(result);
-
- vec->length = fixnum(len);
- strcpy(vec->data, str);
-
- return result;
- }
-
- lispobj alloc_sap(ptr)
- char *ptr;
- {
- struct sap *sap = (struct sap *)alloc_unboxed(type_Sap, 1);
-
- sap->pointer = ptr;
-
- return (lispobj) sap | type_OtherPointer;
- }
-
-