projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| f54d4287 BM |
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. | |
| 30c3de1f JS |
36 | * |
| 37 | * These routines normally require an explicit call to GC_init(), though | |
| 38 | * that may be done from a constructor function. | |
| f54d4287 BM |
39 | */ |
| 40 | ||
| 41 | #ifndef GC_LOCAL_ALLOC_H | |
| 42 | #define GC_LOCAL_ALLOC_H | |
| 43 | ||
| 44 | #ifndef _GC_H | |
| 45 | # include "gc.h" | |
| 46 | #endif | |
| 47 | ||
| 48 | #if defined(GC_GCJ_SUPPORT) && !defined(GC_GCJ_H) | |
| 49 | # include "gc_gcj.h" | |
| 50 | #endif | |
| 51 | ||
| 52 | /* We assume ANSI C for this interface. */ | |
| 53 | ||
| 54 | GC_PTR GC_local_malloc(size_t bytes); | |
| 55 | ||
| 56 | GC_PTR GC_local_malloc_atomic(size_t bytes); | |
| 57 | ||
| 58 | #if defined(GC_GCJ_SUPPORT) | |
| 59 | GC_PTR GC_local_gcj_malloc(size_t bytes, | |
| 60 | void * ptr_to_struct_containing_descr); | |
| 61 | #endif | |
| 62 | ||
| 63 | # ifdef GC_DEBUG | |
| 4109fe85 | 64 | /* We don't really use local allocation in this case. */ |
| f54d4287 BM |
65 | # define GC_LOCAL_MALLOC(s) GC_debug_malloc(s,GC_EXTRAS) |
| 66 | # define GC_LOCAL_MALLOC_ATOMIC(s) GC_debug_malloc_atomic(s,GC_EXTRAS) | |
| 67 | # ifdef GC_GCJ_SUPPORT | |
| 68 | # define GC_LOCAL_GCJ_MALLOC(s,d) GC_debug_gcj_malloc(s,d,GC_EXTRAS) | |
| 69 | # endif | |
| 70 | # else | |
| 71 | # define GC_LOCAL_MALLOC(s) GC_local_malloc(s) | |
| 72 | # define GC_LOCAL_MALLOC_ATOMIC(s) GC_local_malloc_atomic(s) | |
| 73 | # ifdef GC_GCJ_SUPPORT | |
| 74 | # define GC_LOCAL_GCJ_MALLOC(s,d) GC_local_gcj_malloc(s,d) | |
| 75 | # endif | |
| 76 | # endif | |
| 77 | ||
| 78 | # ifdef GC_REDIRECT_TO_LOCAL | |
| 79 | # undef GC_MALLOC | |
| 80 | # define GC_MALLOC(s) GC_LOCAL_MALLOC(s) | |
| 81 | # undef GC_MALLOC_ATOMIC | |
| 82 | # define GC_MALLOC_ATOMIC(s) GC_LOCAL_MALLOC_ATOMIC(s) | |
| 83 | # ifdef GC_GCJ_SUPPORT | |
| 84 | # undef GC_GCJ_MALLOC | |
| 85 | # define GC_GCJ_MALLOC(s,d) GC_LOCAL_GCJ_MALLOC(s,d) | |
| 86 | # endif | |
| 87 | # endif | |
| 88 | ||
| 89 | #endif /* GC_LOCAL_ALLOC_H */ |