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.
13 # include "private/gc_priv.h"
17 * Note that POSIX PCR requires an ANSI C compiler. Hence we are allowed
18 * to make the same assumption here.
19 * We wrap all of the allocator functions to avoid questions of
20 * compatibility between the prototyped and nonprototyped versions of the f
22 # include "config/PCR_StdTypes.h"
23 # include "mm/PCR_MM.h"
27 # define MY_DEBUGMAGIC 42L
29 void * GC_AllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear )
32 void * result = (void *)GC_malloc_atomic(size);
33 if (clear && result != 0) BZERO(result, size);
36 return((void *)GC_malloc(size));
40 void * GC_DebugAllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear )
43 void * result = (void *)GC_debug_malloc_atomic(size, __FILE__,
45 if (clear && result != 0) BZERO(result, size);
48 return((void *)GC_debug_malloc(size, __FILE__, __LINE__));
52 # define GC_ReallocProc GC_realloc
53 void * GC_DebugReallocProc(void * old_object, size_t new_size_in_bytes)
55 return(GC_debug_realloc(old_object, new_size_in_bytes, __FILE__, __LINE__));
58 # define GC_FreeProc GC_free
59 # define GC_DebugFreeProc GC_debug_free
62 PCR_ERes (*ed_proc)(void *p, size_t size, PCR_Any data);
63 GC_bool ed_pointerfree;
64 PCR_ERes ed_fail_code;
65 PCR_Any ed_client_data;
68 void GC_enumerate_block(struct hblk *h; enumerate_data * ed)
75 # error This code was updated without testing.
76 # error and its precursor was clearly broken.
79 descr = hhdr -> hb_descr;
81 if (descr != 0 && ed -> ed_pointerfree
82 || descr == 0 && !(ed -> ed_pointerfree)) return;
83 lim = (ptr_t)(h+1) - sz;
86 if (PCR_ERes_IsErr(ed -> ed_fail_code)) return;
88 (*(ed -> ed_proc))(p, sz, ed -> ed_client_data);
93 struct PCR_MM_ProcsRep * GC_old_allocator = 0;
95 PCR_ERes GC_EnumerateProc(
97 PCR_ERes (*proc)(void *p, size_t size, PCR_Any data),
104 ed.ed_pointerfree = ptrFree;
105 ed.ed_fail_code = PCR_ERes_okay;
106 ed.ed_client_data = data;
107 GC_apply_to_all_blocks(GC_enumerate_block, &ed);
108 if (ed.ed_fail_code != PCR_ERes_okay) {
109 return(ed.ed_fail_code);
111 /* Also enumerate objects allocated by my predecessors */
112 return((*(GC_old_allocator->mmp_enumerate))(ptrFree, proc, data));
116 void GC_DummyFreeProc(void *p) {}
118 void GC_DummyShutdownProc(void) {}
120 struct PCR_MM_ProcsRep GC_Rep = {
124 GC_DummyFreeProc, /* mmp_free */
125 GC_FreeProc, /* mmp_unsafeFree */
127 GC_DummyShutdownProc /* mmp_shutdown */
130 struct PCR_MM_ProcsRep GC_DebugRep = {
134 GC_DummyFreeProc, /* mmp_free */
135 GC_DebugFreeProc, /* mmp_unsafeFree */
137 GC_DummyShutdownProc /* mmp_shutdown */
140 GC_bool GC_use_debug = 0;
142 void GC_pcr_install()
144 PCR_MM_Install((GC_use_debug? &GC_DebugRep : &GC_Rep), &GC_old_allocator);
150 return PCR_ERes_okay;
157 if( !PCR_Base_TestPCRArg("-nogc") ) {
158 GC_quiet = ( PCR_Base_TestPCRArg("-gctrace") ? 0 : 1 );
159 GC_use_debug = (GC_bool)PCR_Base_TestPCRArg("-debug_alloc");
161 if( !PCR_Base_TestPCRArg("-nogc_incremental") ) {
163 * awful hack to test whether VD is implemented ...
165 if( PCR_VD_Start( 0, NIL, 0) != PCR_ERes_FromErr(ENOSYS) ) {
166 GC_enable_incremental();
170 return PCR_ERes_okay;
173 void GC_push_thread_structures(void)
175 /* PCR doesn't work unless static roots are pushed. Can't get here. */
176 ABORT("In GC_push_thread_structures()");