| /* | |
| * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers | |
| * Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved. | |
| * Copyright 1996-1999 by Silicon Graphics. All rights reserved. | |
| * Copyright 1999 by Hewlett-Packard Company. 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. | |
| */ | |
| /* This file assumes the collector has been compiled with GC_GCJ_SUPPORT */ | |
| /* and that an ANSI C compiler is available. */ | |
| /* | |
| * We allocate objects whose first word contains a pointer to a struct | |
| * describing the object type. This struct contains a garbage collector mark | |
| * descriptor at offset MARK_DESCR_OFFSET. Alternatively, the objects | |
| * may be marked by the mark procedure passed to GC_init_gcj_malloc. | |
| */ | |
| /* Gcj keeps GC descriptor as second word of vtable. This */ | |
| /* probably needs to be adjusted for other clients. */ | |
| /* We currently assume that this offset is such that: */ | |
| /* - all objects of this kind are large enough to have */ | |
| /* a value at that offset, and */ | |
| /* - it is not zero. */ | |
| /* These assumptions allow objects on the free list to be */ | |
| /* marked normally. */ | |
| /* The following allocators signal an out of memory condition with */ | |
| /* return GC_oom_fn(bytes); */ | |
| /* The following function must be called before the gcj allocators */ | |
| /* can be invoked. */ | |
| /* mp_index and mp are the index and mark_proc (see gc_mark.h) */ | |
| /* respectively for the allocated objects. Mark_proc will be */ | |
| /* used to build the descriptor for objects allocated through the */ | |
| /* debugging interface. The mark_proc will be invoked on all such */ | |
| /* objects with an "environment" value of 1. The client may choose */ | |
| /* to use the same mark_proc for some of its generated mark descriptors.*/ | |
| /* In that case, it should use a different "environment" value to */ | |
| /* detect the presence or absence of the debug header. */ | |
| /* Mp is really of type mark_proc, as defined in gc_mark.h. We don't */ | |
| /* want to include that here for namespace pollution reasons. */ | |
| extern void GC_init_gcj_malloc(int mp_index, void * /* really mark_proc */mp); | |
| /* Allocate an object, clear it, and store the pointer to the */ | |
| /* type structure (vtable in gcj). */ | |
| /* This adds a byte at the end of the object if GC_malloc would.*/ | |
| extern void * GC_gcj_malloc(size_t lb, void * ptr_to_struct_containing_descr); | |
| /* The debug versions allocate such that the specified mark_proc */ | |
| /* is always invoked. */ | |
| extern void * GC_debug_gcj_malloc(size_t lb, | |
| void * ptr_to_struct_containing_descr, | |
| GC_EXTRA_PARAMS); | |
| /* Similar to GC_gcj_malloc, but assumes that a pointer to near the */ | |
| /* beginning of the resulting object is always maintained. */ | |
| extern void * GC_gcj_malloc_ignore_off_page(size_t lb, | |
| void * ptr_to_struct_containing_descr); | |
| /* The kind numbers of normal and debug gcj objects. */ | |
| /* Useful only for debug support, we hope. */ | |
| extern int GC_gcj_kind; | |
| extern int GC_gcj_debug_kind; | |