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#define MAYBE_DATA_P(pp) ((char *)(pp)>= (char *) DBEGIN)
#ifndef DBEGIN
#define DBEGIN 0
#endif
#define VALID_DATA_ADDRESS_P(pp) \
(MAYBE_DATA_P(pp) && ((char *)(pp) < heap_end))
#ifndef page
#define page(p) (((int)(((char *)(p))-DBEGIN)>>PAGEWIDTH))
#define pagetochar(x) ((char *)(((x) << PAGEWIDTH) + DBEGIN))
#endif
#ifdef UNIX
#define CHECK_FOR_INTERRUPT \
if (interrupt_flag) sigint()
#else
#define CHECK_FOR_INTERRUPT
#endif
#ifdef SGC
char sgc_type_map[MAXPAGE];
int memory_protect();
#define NORMAL_PAGE 0
/* writable til next gc at least */
#define SGC_TEMP_WRITABLE 1
/* Contains objects which will be gc'd */
#define SGC_PAGE_FLAG 2
/* keep writable eg malloc's for system call */
#define SGC_PERM_WRITABLE 4
#define SGC_WRITABLE (SGC_PERM_WRITABLE | SGC_TEMP_WRITABLE)
#define SGC_PAGE (SGC_TEMP_WRITABLE | SGC_PAGE_FLAG)
#define SGC_PAGE_P(p) (sgc_type_map[p] & SGC_PAGE_FLAG)
#define WRITABLE_PAGE_P(p) (sgc_type_map[p] & SGC_WRITABLE)
#define ON_SGC_PAGE(x) (sgc_type_map[page(x)] & SGC_PAGE_FLAG)
#define ON_WRITABLE_PAGE(x) (sgc_type_map[page(x)] & SGC_WRITABLE)
#define IF_WRITABLE(x,if_code) do {int xSG= page(x); \
if(((xSG & (-MAXPAGE)) ==0) && \
(sgc_type_map[xSG] & SGC_WRITABLE)) \
{if_code;}} while(0)
#define sgc_mark_object(x) IF_WRITABLE(x,if((x)->d.m==0) sgc_mark_object1(x))
/*
#define sgc_mark_object(x) sgc_mark_object1(x)
*/
/* When not 0, the free lists in the type manager are freelists
on SGC_PAGE's, for those types supporting sgc.
Marking and sweeping is done specially */
int sgc_on;
/* for the S field of the FIRSTWORD */
enum sgc_type { SGC_NORMAL, /* not allocated since the last sgc */
SGC_RECENT /* allocated since last sgc */
};
#define TM_BASE_TYPE_P(i) (((int) (tm_table[i].tm_type)) == i)
void perm_writable() ;
void make_writable();
#define ROUND_DOWN_PAGE_NO(x) ((x) - (x % page_multiple))
#define ROUND_UP_PAGE_NO(x) (page_multiple *(((x)+page_multiple \
-1)/page_multiple))
/* check if a relblock address is new relblock */
#define SGC_RELBLOCK_P(x) ((char *)(x) >= rb_start)
/* the following assumes that the char s,m fields of first word
have same length as a short
(x->d.m || x->d.s) would be an equivalent for our purposes */
struct sgc_firstword {short t; short sm;};
#define SGC_OR_M(x) (((struct sgc_firstword *)(x))->sm)
#ifndef SIGPROTV
#define SIGPROTV SIGSEGV
#endif
#ifndef INSTALL_MPROTECT_HANDLER
#define INSTALL_MPROTECT_HANDLER akcl_signal(SIGPROTV, memprotect_handler)
#endif
extern void memprotect_handler ();
#else /* END SGC */
#define sgc_quit()
#define sgc_start()
#define sgc_count_type(x) 0
#endif
extern int sgc_enabled;
#define TM_NUSED(pt) (((pt).tm_npage*(pt).tm_nppage) - (pt).tm_nfree)
#define F_LINK(x) ((struct freelist *) x)->f_link
/* virtual memory pages are this multiple of lisp page size */
#ifndef IN_MAIN
extern int page_multiple;
#endif
/*
Type map.
enum type type_map[MAXPAGE];
*/
char type_map[MAXPAGE];
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.