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Diffstat (limited to 'boehm-gc/include/gc_local_alloc.h')
| -rw-r--r-- | boehm-gc/include/gc_local_alloc.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/boehm-gc/include/gc_local_alloc.h b/boehm-gc/include/gc_local_alloc.h new file mode 100644 index 000000000..1874c7b6d --- /dev/null +++ b/boehm-gc/include/gc_local_alloc.h @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2000 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. + */ + +/* + * Interface for thread local allocation. Memory obtained + * this way can be used by all threads, as though it were obtained + * from an allocator like GC_malloc. The difference is that GC_local_malloc + * counts the number of allocations of a given size from the current thread, + * and uses GC_malloc_many to perform the allocations once a threashold + * is exceeded. Thus far less synchronization may be needed. + * Allocation of known large objects should not use this interface. + * This interface is designed primarily for fast allocation of small + * objects on multiprocessors, e.g. for a JVM running on an MP server. + * + * If this file is included with GC_GCJ_SUPPORT defined, GCJ-style + * bitmap allocation primitives will also be included. + * + * If this file is included with GC_REDIRECT_TO_LOCAL defined, then + * GC_MALLOC, GC_MALLOC_ATOMIC, and possibly GC_GCJ_MALLOC will + * be redefined to use the thread local allocatoor. + * + * The interface is available only if the collector is built with + * -DTHREAD_LOCAL_ALLOC, which is currently supported only on Linux. + * + * The debugging allocators use standard, not thread-local allocation. + * + * These routines normally require an explicit call to GC_init(), though + * that may be done from a constructor function. + */ + +#ifndef GC_LOCAL_ALLOC_H +#define GC_LOCAL_ALLOC_H + +#ifndef _GC_H +# include "gc.h" +#endif + +#if defined(GC_GCJ_SUPPORT) && !defined(GC_GCJ_H) +# include "gc_gcj.h" +#endif + +/* We assume ANSI C for this interface. */ + +GC_PTR GC_local_malloc(size_t bytes); + +GC_PTR GC_local_malloc_atomic(size_t bytes); + +#if defined(GC_GCJ_SUPPORT) + GC_PTR GC_local_gcj_malloc(size_t bytes, + void * ptr_to_struct_containing_descr); +#endif + +# ifdef GC_DEBUG + /* We don't really use local allocation in this case. */ +# define GC_LOCAL_MALLOC(s) GC_debug_malloc(s,GC_EXTRAS) +# define GC_LOCAL_MALLOC_ATOMIC(s) GC_debug_malloc_atomic(s,GC_EXTRAS) +# ifdef GC_GCJ_SUPPORT +# define GC_LOCAL_GCJ_MALLOC(s,d) GC_debug_gcj_malloc(s,d,GC_EXTRAS) +# endif +# else +# define GC_LOCAL_MALLOC(s) GC_local_malloc(s) +# define GC_LOCAL_MALLOC_ATOMIC(s) GC_local_malloc_atomic(s) +# ifdef GC_GCJ_SUPPORT +# define GC_LOCAL_GCJ_MALLOC(s,d) GC_local_gcj_malloc(s,d) +# endif +# endif + +# ifdef GC_REDIRECT_TO_LOCAL +# undef GC_MALLOC +# define GC_MALLOC(s) GC_LOCAL_MALLOC(s) +# undef GC_MALLOC_ATOMIC +# define GC_MALLOC_ATOMIC(s) GC_LOCAL_MALLOC_ATOMIC(s) +# ifdef GC_GCJ_SUPPORT +# undef GC_GCJ_MALLOC +# define GC_GCJ_MALLOC(s,d) GC_LOCAL_GCJ_MALLOC(s,d) +# endif +# endif + +#endif /* GC_LOCAL_ALLOC_H */ |