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Annotation of OpenXM_contrib2/asir2000/gc/include/gc_local_alloc.h, Revision 1.1

1.1     ! noro        1: /*
        !             2:  * Copyright (c) 2000 by Hewlett-Packard Company.  All rights reserved.
        !             3:  *
        !             4:  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
        !             5:  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
        !             6:  *
        !             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.
        !            12:  */
        !            13:
        !            14: /*
        !            15:  * Interface for thread local allocation.  Memory obtained
        !            16:  * this way can be used by all threads, as though it were obtained
        !            17:  * from an allocator like GC_malloc.  The difference is that GC_local_malloc
        !            18:  * counts the number of allocations of a given size from the current thread,
        !            19:  * and uses GC_malloc_many to perform the allocations once a threashold
        !            20:  * is exceeded.  Thus far less synchronization may be needed.
        !            21:  * Allocation of known large objects should not use this interface.
        !            22:  * This interface is designed primarily for fast allocation of small
        !            23:  * objects on multiprocessors, e.g. for a JVM running on an MP server.
        !            24:  *
        !            25:  * If this file is included with GC_GCJ_SUPPORT defined, GCJ-style
        !            26:  * bitmap allocation primitives will also be included.
        !            27:  *
        !            28:  * If this file is included with GC_REDIRECT_TO_LOCAL defined, then
        !            29:  * GC_MALLOC, GC_MALLOC_ATOMIC, and possibly GC_GCJ_MALLOC will
        !            30:  * be redefined to use the thread local allocatoor.
        !            31:  *
        !            32:  * The interface is available only if the collector is built with
        !            33:  * -DTHREAD_LOCAL_ALLOC, which is currently supported only on Linux.
        !            34:  *
        !            35:  * The debugging allocators use standard, not thread-local allocation.
        !            36:  */
        !            37:
        !            38: #ifndef GC_LOCAL_ALLOC_H
        !            39: #define GC_LOCAL_ALLOC_H
        !            40:
        !            41: #ifndef _GC_H
        !            42: #   include "gc.h"
        !            43: #endif
        !            44:
        !            45: #if defined(GC_GCJ_SUPPORT) && !defined(GC_GCJ_H)
        !            46: #   include "gc_gcj.h"
        !            47: #endif
        !            48:
        !            49: /* We assume ANSI C for this interface.        */
        !            50:
        !            51: GC_PTR GC_local_malloc(size_t bytes);
        !            52:
        !            53: GC_PTR GC_local_malloc_atomic(size_t bytes);
        !            54:
        !            55: #if defined(GC_GCJ_SUPPORT)
        !            56:   GC_PTR GC_local_gcj_malloc(size_t bytes,
        !            57:                             void * ptr_to_struct_containing_descr);
        !            58: #endif
        !            59:
        !            60: # ifdef GC_DEBUG
        !            61: #   define GC_LOCAL_MALLOC(s) GC_debug_malloc(s,GC_EXTRAS)
        !            62: #   define GC_LOCAL_MALLOC_ATOMIC(s) GC_debug_malloc_atomic(s,GC_EXTRAS)
        !            63: #   ifdef GC_GCJ_SUPPORT
        !            64: #      define GC_LOCAL_GCJ_MALLOC(s,d) GC_debug_gcj_malloc(s,d,GC_EXTRAS)
        !            65: #   endif
        !            66: # else
        !            67: #   define GC_LOCAL_MALLOC(s) GC_local_malloc(s)
        !            68: #   define GC_LOCAL_MALLOC_ATOMIC(s) GC_local_malloc_atomic(s)
        !            69: #   ifdef GC_GCJ_SUPPORT
        !            70: #      define GC_LOCAL_GCJ_MALLOC(s,d) GC_local_gcj_malloc(s,d)
        !            71: #   endif
        !            72: # endif
        !            73:
        !            74: # ifdef GC_REDIRECT_TO_LOCAL
        !            75: #   undef GC_MALLOC
        !            76: #   define GC_MALLOC(s) GC_LOCAL_MALLOC(s)
        !            77: #   undef GC_MALLOC_ATOMIC
        !            78: #   define GC_MALLOC_ATOMIC(s) GC_LOCAL_MALLOC_ATOMIC(s)
        !            79: #   ifdef GC_GCJ_SUPPORT
        !            80: #      undef GC_GCJ_MALLOC
        !            81: #      define GC_GCJ_MALLOC(s,d) GC_LOCAL_GCJ_MALLOC(s,d)
        !            82: #   endif
        !            83: # endif
        !            84:
        !            85: #endif /* GC_LOCAL_ALLOC_H */