67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2007-2011 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef GC_DISCLAIM_H
|
|
#define GC_DISCLAIM_H
|
|
|
|
#include "gc.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* This API is defined only if the library has been suitably compiled */
|
|
/* (i.e. with ENABLE_DISCLAIM defined). */
|
|
|
|
/* Prepare the object kind used by GC_finalized_malloc. Call it from */
|
|
/* your initialization code or, at least, at some point before using */
|
|
/* finalized allocations. The function is thread-safe. */
|
|
GC_API void GC_CALL GC_init_finalized_malloc(void);
|
|
|
|
/* Type of a disclaim call-back. */
|
|
typedef int (GC_CALLBACK * GC_disclaim_proc)(void * /*obj*/);
|
|
|
|
/* Register "proc" to be called on each object of "kind" ready to be */
|
|
/* reclaimed. If "proc" returns non-zero, the collector will not */
|
|
/* reclaim the object on this GC cycle. Objects reachable from "proc" */
|
|
/* will be protected from collection if "mark_from_all" is non-zero, */
|
|
/* but at the expense that long chains of objects will take many cycles */
|
|
/* to reclaim. */
|
|
GC_API void GC_CALL GC_register_disclaim_proc(int /*kind*/,
|
|
GC_disclaim_proc /*proc*/,
|
|
int /*mark_from_all*/);
|
|
|
|
/* The finalizer closure used by GC_finalized_malloc. */
|
|
struct GC_finalizer_closure {
|
|
GC_finalization_proc proc;
|
|
void *cd;
|
|
};
|
|
|
|
/* Allocate "size" bytes which is finalized by "fc". This uses a */
|
|
/* dedicated object kind with a disclaim procedure, and is more */
|
|
/* efficient than GC_register_finalizer and friends. */
|
|
/* GC_init_finalized_malloc must be called before using this. */
|
|
/* Note that GC_size (applied to such allocated object) returns a value */
|
|
/* slightly bigger than the specified allocation size, and that GC_base */
|
|
/* result points to a word prior to the start of the allocated object. */
|
|
GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL
|
|
GC_finalized_malloc(size_t /*size*/,
|
|
const struct GC_finalizer_closure * /*fc*/);
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif
|