/*
- * allocation routines for C code. For allocation done by Lisp look
+ * allocation routines for C code. For allocation done by Lisp look
* instead at src/compiler/target/alloc.lisp and .../macros.lisp
*/
#include "genesis/bignum.h"
#include "genesis/sap.h"
-#define GET_FREE_POINTER() dynamic_space_free_pointer
-#define SET_FREE_POINTER(new_value) \
- (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);
+#define ALIGNED_SIZE(n) ((n) + LOWTAG_MASK) & ~LOWTAG_MASK
-#define ALIGNED_SIZE(n) (n+LOWTAG_MASK) & ~LOWTAG_MASK
-
-#if defined LISP_FEATURE_GENCGC
+#ifdef LISP_FEATURE_GENCGC
extern lispobj *alloc(int bytes);
-lispobj *
-pa_alloc(int bytes)
-{
- lispobj *result=0;
- struct thread *th=arch_os_get_current_thread();
- SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0),th);
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1),th);
- result=alloc(bytes);
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0),th);
- if (SymbolValue(PSEUDO_ATOMIC_INTERRUPTED,th))
- /* even if we gc at this point, the new allocation will be
- * protected from being moved, because result is on the c stack
- * and points to it */
- do_pending_interrupt();
- return result;
-}
+#endif
-#else
static lispobj *
pa_alloc(int bytes)
{
- char *result;
+ lispobj *result;
+#ifdef LISP_FEATURE_GENCGC
+ struct thread *th = arch_os_get_current_thread();
- /* Round to dual word boundary. */
- bytes = (bytes + LOWTAG_MASK) & ~LOWTAG_MASK;
+ /* FIXME: OOAO violation: see arch_pseudo_* */
+ SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0),th);
+ SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1),th);
+ result = alloc(bytes);
+ SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0),th);
+ if (fixnum_value(SymbolValue(PSEUDO_ATOMIC_INTERRUPTED,th)))
+ /* Even if we gc at this point, the new allocation will be
+ * protected from being moved, because result is on the c stack
+ * and points to it. */
+ do_pending_interrupt();
+#else
+ /* FIXME: this is not pseudo atomic at all, but is called only from
+ * interrupt safe places like interrupt handlers. MG - 2005-08-09 */
+ result = dynamic_space_free_pointer;
- result = (char *)GET_FREE_POINTER();
+ /* Align up to next dual word boundary. */
+ bytes = ALIGNED_SIZE(bytes);
- SET_FREE_POINTER((lispobj *)(result + bytes));
+ dynamic_space_free_pointer = (lispobj *)((char *)result + bytes);
- if (GET_GC_TRIGGER() && GET_FREE_POINTER() > GET_GC_TRIGGER()) {
- SET_GC_TRIGGER((char *)GET_FREE_POINTER()
- - (char *)current_dynamic_space);
+ if (current_auto_gc_trigger
+ && dynamic_space_free_pointer > current_auto_gc_trigger) {
+ clear_auto_gc_trigger();
+ set_auto_gc_trigger((char *)dynamic_space_free_pointer
+ - (char *)current_dynamic_space);
}
- return (lispobj *) result;
-}
#endif
+ return result;
+}
lispobj *
ptr->digits[0] = n;
- return make_lispobj(ptr, OTHER_POINTER_LOWTAG);
+ return make_lispobj(ptr, OTHER_POINTER_LOWTAG);
}
}
{
struct sap *sap;
sap=(struct sap *)
- alloc_unboxed((int)SAP_WIDETAG, sizeof(struct sap)/sizeof(lispobj) -1);
+ alloc_unboxed((int)SAP_WIDETAG, sizeof(struct sap)/sizeof(lispobj) -1);
sap->pointer = ptr;
return make_lispobj(sap,OTHER_POINTER_LOWTAG);
}