diff options
Diffstat (limited to 'tools/build/src/engine/boehm_gc/include/private/thread_local_alloc.h')
| -rw-r--r-- | tools/build/src/engine/boehm_gc/include/private/thread_local_alloc.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/tools/build/src/engine/boehm_gc/include/private/thread_local_alloc.h b/tools/build/src/engine/boehm_gc/include/private/thread_local_alloc.h new file mode 100644 index 000000000..4c2c5362f --- /dev/null +++ b/tools/build/src/engine/boehm_gc/include/private/thread_local_alloc.h @@ -0,0 +1,152 @@ +/* + * Copyright (c) 2000-2005 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. + */ + +/* Included indirectly from a thread-library-specific file. */ +/* This is the interface for thread-local allocation, whose */ +/* implementation is mostly thread-library-independent. */ +/* Here we describe only the interface that needs to be known */ +/* and invoked from the thread support layer; the actual */ +/* implementation also exports GC_malloc and friends, which */ +/* are declared in gc.h. */ + +#include "private/gc_priv.h" + +#if defined(THREAD_LOCAL_ALLOC) + +#include "gc_inline.h" + + +# if defined USE_HPUX_TLS +# error USE_HPUX_TLS macro was replaced by USE_COMPILER_TLS +# endif + +# if !defined(USE_PTHREAD_SPECIFIC) && !defined(USE_WIN32_SPECIFIC) && \ + !defined(USE_WIN32_COMPILER_TLS) && !defined(USE_COMPILER_TLS) && \ + !defined(USE_CUSTOM_SPECIFIC) +# if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32) +# if defined(__GNUC__) /* Fixed for versions past 2.95? */ +# define USE_WIN32_SPECIFIC +# else +# define USE_WIN32_COMPILER_TLS +# endif /* !GNU */ +# elif defined(LINUX) && !defined(ARM32) && \ + (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >=3)) +# define USE_COMPILER_TLS +# elif (defined(GC_DGUX386_THREADS) || defined(GC_OSF1_THREADS) || \ + defined(GC_DARWIN_THREADS) || defined(GC_AIX_THREADS)) || \ + defined(GC_NETBSD_THREADS) +# define USE_PTHREAD_SPECIFIC +# elif defined(GC_HPUX_THREADS) +# ifdef __GNUC__ +# define USE_PTHREAD_SPECIFIC + /* Empirically, as of gcc 3.3, USE_COMPILER_TLS doesn't work. */ +# else +# define USE_COMPILER_TLS +# endif +# else +# define USE_CUSTOM_SPECIFIC /* Use our own. */ +# endif +# endif + +# include <stdlib.h> + +/* One of these should be declared as the tlfs field in the */ +/* structure pointed to by a GC_thread. */ +typedef struct thread_local_freelists { +# ifdef THREAD_LOCAL_ALLOC + void * ptrfree_freelists[TINY_FREELISTS]; + void * normal_freelists[TINY_FREELISTS]; +# ifdef GC_GCJ_SUPPORT + void * gcj_freelists[TINY_FREELISTS]; +# define ERROR_FL (void *)(-1) + /* Value used for gcj_freelist[-1]; allocation is */ + /* erroneous. */ +# endif + /* Free lists contain either a pointer or a small count */ + /* reflecting the number of granules allocated at that */ + /* size. */ + /* 0 ==> thread-local allocation in use, free list */ + /* empty. */ + /* > 0, <= DIRECT_GRANULES ==> Using global allocation, */ + /* too few objects of this size have been */ + /* allocated by this thread. */ + /* >= HBLKSIZE => pointer to nonempty free list. */ + /* > DIRECT_GRANULES, < HBLKSIZE ==> transition to */ + /* local alloc, equivalent to 0. */ +# define DIRECT_GRANULES (HBLKSIZE/GRANULE_BYTES) + /* Don't use local free lists for up to this much */ + /* allocation. */ + +# endif +} *GC_tlfs; + +# if defined(USE_PTHREAD_SPECIFIC) +# define GC_getspecific pthread_getspecific +# define GC_setspecific pthread_setspecific +# define GC_key_create pthread_key_create +# define GC_remove_specific(key) /* No need for cleanup on exit. */ + typedef pthread_key_t GC_key_t; +# elif defined(USE_COMPILER_TLS) || defined(USE_WIN32_COMPILER_TLS) +# define GC_getspecific(x) (x) +# define GC_setspecific(key, v) ((key) = (v), 0) +# define GC_key_create(key, d) 0 +# define GC_remove_specific(key) /* No need for cleanup on exit. */ + typedef void * GC_key_t; +# elif defined(USE_WIN32_SPECIFIC) +# include <windows.h> +# define GC_getspecific TlsGetValue +# define GC_setspecific(key, v) !TlsSetValue(key, v) + /* We assume 0 == success, msft does the opposite. */ +# define GC_key_create(key, d) \ + ((d) != 0? (ABORT("Destructor unsupported by TlsAlloc"),0) \ + : (*(key) = TlsAlloc(), 0)) +# define GC_remove_specific(key) /* No need for cleanup on thread exit. */ + /* Need TlsFree on process exit/detach ? */ + typedef DWORD GC_key_t; +# elif defined(USE_CUSTOM_SPECIFIC) +# include "private/specific.h" +# else +# error implement me +# endif + + +/* Each thread structure must be initialized. */ +/* This call must be made from the new thread. */ +/* Caller holds allocation lock. */ +void GC_init_thread_local(GC_tlfs p); + +/* Called when a thread is unregistered, or exits. */ +/* We hold the allocator lock. */ +void GC_destroy_thread_local(GC_tlfs p); + +/* The thread support layer must arrange to mark thread-local */ +/* free lists explicitly, since the link field is often */ +/* invisible to the marker. It knows hoe to find all threads; */ +/* we take care of an individual thread freelist structure. */ +void GC_mark_thread_local_fls_for(GC_tlfs p); + +extern +#if defined(USE_COMPILER_TLS) + __thread +#elif defined(USE_WIN32_COMPILER_TLS) + __declspec(thread) +#endif +GC_key_t GC_thread_key; + +/* This is set up by the thread_local_alloc implementation. But the */ +/* thread support layer calls GC_remove_specific(GC_thread_key) */ +/* before a thread exits. */ +/* And the thread support layer makes sure that GC_thread_key is traced,*/ +/* if necessary. */ + +#endif /* THREAD_LOCAL_ALLOC */ |