home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
- /* Boehm, March 28, 1994 1:58 pm PST */
- # include "gc_priv.h"
-
- # ifdef PCR
- /*
- * Note that POSIX PCR requires an ANSI C compiler. Hence we are allowed
- * to make the same assumption here.
- * We wrap all of the allocator functions to avoid questions of
- * compatibility between the prototyped and nonprototyped versions of the f
- */
- # include "config/PCR_StdTypes.h"
- # include "mm/PCR_MM.h"
- # include <errno.h>
-
- # define MY_MAGIC 17L
-
- void * GC_AllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear )
- {
- if (ptrFree) {
- void * result = (void *)GC_malloc_atomic(size);
- if (clear && result != 0) BZERO(result, size);
- return(result);
- } else {
- return((void *)GC_malloc(size));
- }
- }
-
- # define GC_ReallocProc GC_realloc
-
- # define GC_FreeProc GC_free
-
- typedef struct {
- PCR_ERes (*ed_proc)(void *p, size_t size, PCR_Any data);
- bool ed_pointerfree;
- PCR_ERes ed_fail_code;
- PCR_Any ed_client_data;
- } enumerate_data;
-
- void GC_enumerate_block(h, ed)
- register struct hblk *h;
- enumerate_data * ed;
- {
- register hdr * hhdr;
- register int sz;
- word *p;
- word * lim;
-
- hhdr = HDR(h);
- sz = hhdr -> hb_sz;
- if (sz >= 0 && ed -> ed_pointerfree
- || sz <= 0 && !(ed -> ed_pointerfree)) return;
- if (sz < 0) sz = -sz;
- lim = (word *)(h+1) - sz;
- p = (word *)h;
- do {
- if (PCR_ERes_IsErr(ed -> ed_fail_code)) return;
- ed -> ed_fail_code =
- (*(ed -> ed_proc))(p, WORDS_TO_BYTES(sz), ed -> ed_client_data);
- p+= sz;
- } while (p <= lim);
- }
-
- struct PCR_MM_ProcsRep * GC_old_allocator = 0;
-
- PCR_ERes GC_EnumerateProc(
- PCR_Bool ptrFree,
- PCR_ERes (*proc)(void *p, size_t size, PCR_Any data),
- PCR_Any data
- )
- {
- enumerate_data ed;
-
- ed.ed_proc = proc;
- ed.ed_pointerfree = ptrFree;
- ed.ed_fail_code = PCR_ERes_okay;
- ed.ed_client_data = data;
- GC_apply_to_all_blocks(GC_enumerate_block, &ed);
- if (ed.ed_fail_code != PCR_ERes_okay) {
- return(ed.ed_fail_code);
- } else {
- /* Also enumerate objects allocated by my predecessors */
- return((*(GC_old_allocator->mmp_enumerate))(ptrFree, proc, data));
- }
- }
-
- void GC_DummyFreeProc(void *p) {};
-
- void GC_DummyShutdownProc(void) {};
-
- struct PCR_MM_ProcsRep GC_Rep = {
- MY_MAGIC,
- GC_AllocProc,
- GC_ReallocProc,
- GC_DummyFreeProc, /* mmp_free */
- GC_FreeProc, /* mmp_unsafeFree */
- GC_EnumerateProc,
- GC_DummyShutdownProc /* mmp_shutdown */
- };
-
- void GC_pcr_install()
- {
- PCR_MM_Install(&GC_Rep, &GC_old_allocator);
- }
-
- PCR_ERes
- PCR_GC_Setup(void)
- {
- return PCR_ERes_okay;
- }
-
- PCR_ERes
- PCR_GC_Run(void)
- {
-
- if( !PCR_Base_TestPCRArg("-nogc") ) {
- GC_quiet = ( PCR_Base_TestPCRArg("-gctrace") ? 0 : 1 );
- GC_init();
- if( !PCR_Base_TestPCRArg("-nogc_incremental") ) {
- /*
- * awful hack to test whether VD is implemented ...
- */
- if( PCR_VD_Start( 0, NIL, 0) != PCR_ERes_FromErr(ENOSYS) ) {
- GC_enable_incremental();
- }
- }
- }
- return PCR_ERes_okay;
- }
-
- # endif
-