#ifndef _GC_H_
#define _GC_H_
+typedef signed long page_index_t;
+typedef signed char generation_index_t;
extern void gc_init(void);
extern void gc_initialize_pointers(void);
-extern void collect_garbage(unsigned last_gen);
+extern void collect_garbage(generation_index_t last_gen);
extern void gc_init_tables(void);
extern void clear_auto_gc_trigger(void);
extern int maybe_gc_pending;
-extern int gc_thread_pid;
+
+#include "fixnump.h"
+
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+
+#define set_alloc_pointer(value) \
+ SetSymbolValue(ALLOCATION_POINTER, value, 0)
+#define get_alloc_pointer() \
+ SymbolValue(ALLOCATION_POINTER, 0)
+#define get_binding_stack_pointer(thread) \
+ SymbolValue(BINDING_STACK_POINTER, thread)
+#define get_pseudo_atomic_atomic(thread) \
+ SymbolValue(PSEUDO_ATOMIC_ATOMIC, thread)
+#define set_pseudo_atomic_atomic(thread) \
+ SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1), thread);
+#define clear_pseudo_atomic_atomic(thread) \
+ SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0), thread);
+#define get_pseudo_atomic_interrupted(thread) \
+ fixnum_value(SymbolValue(PSEUDO_ATOMIC_INTERRUPTED, thread))
+#define clear_pseudo_atomic_interrupted(thread) \
+ SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0), thread)
+#define set_pseudo_atomic_interrupted(thread) \
+ SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(1), thread)
+
+#elif defined(LISP_FEATURE_PPC) && defined(LISP_FEATURE_GENCGC)
+
+#define set_alloc_pointer(value) \
+ (dynamic_space_free_pointer = \
+ (value) | (((unsigned long)dynamic_space_free_pointer) & LOWTAG_MASK))
+
+#define get_alloc_pointer() \
+ ((unsigned long) dynamic_space_free_pointer & ~LOWTAG_MASK)
+#define get_binding_stack_pointer(thread) \
+ (current_binding_stack_pointer)
+#define get_pseudo_atomic_atomic(thread) \
+ ((unsigned long)dynamic_space_free_pointer & flag_PseudoAtomic)
+#define set_pseudo_atomic_atomic(thread) \
+ (dynamic_space_free_pointer \
+ = (lispobj*) ((unsigned long)dynamic_space_free_pointer | flag_PseudoAtomic))
+#define clear_pseudo_atomic_atomic(thread) \
+ (dynamic_space_free_pointer \
+ = (lispobj*) ((unsigned long) dynamic_space_free_pointer & ~flag_PseudoAtomic))
+#define get_pseudo_atomic_interrupted(thread) \
+ ((unsigned long) dynamic_space_free_pointer & flag_PseudoAtomicInterrupted)
+#define clear_pseudo_atomic_interrupted(thread) \
+ (dynamic_space_free_pointer \
+ = (lispobj*) ((unsigned long) dynamic_space_free_pointer & ~flag_PseudoAtomicInterrupted))
+#define set_pseudo_atomic_interrupted(thread) \
+ (dynamic_space_free_pointer \
+ = (lispobj*) ((unsigned long) dynamic_space_free_pointer | flag_PseudoAtomicInterrupted))
+
+#endif
+
#endif /* _GC_H_ */