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Diffstat (limited to 'gc/pcr_interface.c')
| -rw-r--r-- | gc/pcr_interface.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/gc/pcr_interface.c b/gc/pcr_interface.c new file mode 100644 index 0000000..4c95093 --- /dev/null +++ b/gc/pcr_interface.c @@ -0,0 +1,173 @@ +/* + * 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, February 7, 1996 11:09 am 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 +# define MY_DEBUGMAGIC 42L + +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)); + } +} + +void * GC_DebugAllocProc(size_t size, PCR_Bool ptrFree, PCR_Bool clear ) +{ + if (ptrFree) { + void * result = (void *)GC_debug_malloc_atomic(size, __FILE__, + __LINE__); + if (clear && result != 0) BZERO(result, size); + return(result); + } else { + return((void *)GC_debug_malloc(size, __FILE__, __LINE__)); + } +} + +# define GC_ReallocProc GC_realloc +void * GC_DebugReallocProc(void * old_object, size_t new_size_in_bytes) +{ + return(GC_debug_realloc(old_object, new_size_in_bytes, __FILE__, __LINE__)); +} + +# define GC_FreeProc GC_free +# define GC_DebugFreeProc GC_debug_free + +typedef struct { + PCR_ERes (*ed_proc)(void *p, size_t size, PCR_Any data); + GC_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 */ +}; + +struct PCR_MM_ProcsRep GC_DebugRep = { + MY_DEBUGMAGIC, + GC_DebugAllocProc, + GC_DebugReallocProc, + GC_DummyFreeProc, /* mmp_free */ + GC_DebugFreeProc, /* mmp_unsafeFree */ + GC_EnumerateProc, + GC_DummyShutdownProc /* mmp_shutdown */ +}; + +GC_bool GC_use_debug = 0; + +void GC_pcr_install() +{ + PCR_MM_Install((GC_use_debug? &GC_DebugRep : &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_use_debug = (GC_bool)PCR_Base_TestPCRArg("-debug_alloc"); + 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 |