2 * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
4 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
5 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
7 * Permission is hereby granted to use or copy this program
8 * for any purpose, provided the above notices are retained on all copies.
9 * Permission to modify the code and to distribute modified code is granted,
10 * provided the above notices are retained, and a notice that the code was
11 * modified is included with the above copyright notice.
16 # include "private/gc_priv.h"
20 * Note that POSIX PCR requires an ANSI C compiler. Hence we are allowed
21 * to make the same assumption here.
22 * We wrap all of the allocator functions to avoid questions of
23 * compatibility between the prototyped and nonprototyped versions of the f
25 # include "config/PCR_StdTypes.h"
26 # include "mm/PCR_MM.h"
30 # define MY_DEBUGMAGIC 42L
32 void * GC_AllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear )
35 void * result = (void *)GC_malloc_atomic(size);
36 if (clear && result != 0) BZERO(result, size);
39 return((void *)GC_malloc(size));
43 void * GC_DebugAllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear )
46 void * result = (void *)GC_debug_malloc_atomic(size, __FILE__,
48 if (clear && result != 0) BZERO(result, size);
51 return((void *)GC_debug_malloc(size, __FILE__, __LINE__));
55 # define GC_ReallocProc GC_realloc
56 void * GC_DebugReallocProc(void * old_object, size_t new_size_in_bytes)
58 return(GC_debug_realloc(old_object, new_size_in_bytes, __FILE__, __LINE__));
61 # define GC_FreeProc GC_free
62 # define GC_DebugFreeProc GC_debug_free
65 PCR_ERes (*ed_proc)(void *p, size_t size, PCR_Any data);
66 GC_bool ed_pointerfree;
67 PCR_ERes ed_fail_code;
68 PCR_Any ed_client_data;
71 void GC_enumerate_block(h, ed)
72 register struct hblk *h;
82 if (sz >= 0 && ed -> ed_pointerfree
83 || sz <= 0 && !(ed -> ed_pointerfree)) return;
85 lim = (word *)(h+1) - sz;
88 if (PCR_ERes_IsErr(ed -> ed_fail_code)) return;
90 (*(ed -> ed_proc))(p, WORDS_TO_BYTES(sz), ed -> ed_client_data);
95 struct PCR_MM_ProcsRep * GC_old_allocator = 0;
97 PCR_ERes GC_EnumerateProc(
99 PCR_ERes (*proc)(void *p, size_t size, PCR_Any data),
106 ed.ed_pointerfree = ptrFree;
107 ed.ed_fail_code = PCR_ERes_okay;
108 ed.ed_client_data = data;
109 GC_apply_to_all_blocks(GC_enumerate_block, &ed);
110 if (ed.ed_fail_code != PCR_ERes_okay) {
111 return(ed.ed_fail_code);
113 /* Also enumerate objects allocated by my predecessors */
114 return((*(GC_old_allocator->mmp_enumerate))(ptrFree, proc, data));
118 void GC_DummyFreeProc(void *p) {}
120 void GC_DummyShutdownProc(void) {}
122 struct PCR_MM_ProcsRep GC_Rep = {
126 GC_DummyFreeProc, /* mmp_free */
127 GC_FreeProc, /* mmp_unsafeFree */
129 GC_DummyShutdownProc /* mmp_shutdown */
132 struct PCR_MM_ProcsRep GC_DebugRep = {
136 GC_DummyFreeProc, /* mmp_free */
137 GC_DebugFreeProc, /* mmp_unsafeFree */
139 GC_DummyShutdownProc /* mmp_shutdown */
142 GC_bool GC_use_debug = 0;
144 void GC_pcr_install()
146 PCR_MM_Install((GC_use_debug? &GC_DebugRep : &GC_Rep), &GC_old_allocator);
152 return PCR_ERes_okay;
159 if( !PCR_Base_TestPCRArg("-nogc") ) {
160 GC_quiet = ( PCR_Base_TestPCRArg("-gctrace") ? 0 : 1 );
161 GC_use_debug = (GC_bool)PCR_Base_TestPCRArg("-debug_alloc");
163 if( !PCR_Base_TestPCRArg("-nogc_incremental") ) {
165 * awful hack to test whether VD is implemented ...
167 if( PCR_VD_Start( 0, NIL, 0) != PCR_ERes_FromErr(ENOSYS) ) {
168 GC_enable_incremental();
172 return PCR_ERes_okay;
175 void GC_push_thread_structures(void)
177 /* PCR doesn't work unless static roots are pushed. Can't get here. */
178 ABORT("In GC_push_thread_structures()");