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/* $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/lisp/alloc.c,v 1.2 1994/03/27 15:19:55 hallgren Exp $ */
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#include "lisp.h"
#include "internals.h"
#include "alloc.h"
#include "globals.h"
#include "gc.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(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;
}
static lispobj *alloc_unboxed(int type, int words)
{
lispobj *result;
result = alloc((1 + words) * sizeof(lispobj));
*result = (lispobj) (words << type_Bits) | type;
return result;
}
static lispobj alloc_vector(int type, int length, int size)
{
struct vector *result;
result = (struct vector *)alloc((2 + (length*size + 31) / 32) * sizeof(lispobj));
result->header = type;
result->length = make_fixnum(length);
return ((lispobj)result)|type_OtherPointer;
}
lispobj alloc_cons(lispobj car, lispobj cdr)
{
struct cons *ptr = (struct cons *)alloc(sizeof(struct cons));
ptr->car = car;
ptr->cdr = cdr;
return (lispobj)ptr | type_ListPointer;
}
lispobj alloc_number(long n)
{
struct bignum *ptr;
if (-0x20000000 < n && n < 0x20000000)
return make_fixnum(n);
else {
ptr = (struct bignum *)alloc_unboxed(type_Bignum, 1);
ptr->digits[0] = n;
return (lispobj) ptr | type_OtherPointer;
}
}
lispobj alloc_string(char *str)
{
int len = strlen(str);
lispobj result = alloc_vector(type_SimpleString, len+1, 8);
struct vector *vec = (struct vector *)PTR(result);
vec->length = make_fixnum(len);
strcpy((char *)vec->data, str);
return result;
}
lispobj alloc_sap(void *ptr)
{
#else
struct sap *sap = (struct sap *)alloc_unboxed(type_Sap, 3);
#endif