/* * 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. */ #ifndef GC_THREAD_LOCAL_ALLOC_H #define GC_THREAD_LOCAL_ALLOC_H #include "private/gc_priv.h" #ifdef 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? */ \ || defined(MSWINCE) # define USE_WIN32_SPECIFIC # else # define USE_WIN32_COMPILER_TLS # endif /* !GNU */ # elif defined(LINUX) && !defined(ARM32) && !defined(AVR32) \ && (__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) || defined(GC_RTEMS_PTHREADS) # 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 /* One of these should be declared as the tlfs field in the */ /* structure pointed to by a GC_thread. */ typedef struct thread_local_freelists { void * ptrfree_freelists[TINY_FREELISTS]; void * normal_freelists[TINY_FREELISTS]; # ifdef GC_GCJ_SUPPORT void * gcj_freelists[TINY_FREELISTS]; # define ERROR_FL ((void *)(word)-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. */ } *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) # ifndef WIN32_LEAN_AND_MEAN # define WIN32_LEAN_AND_MEAN 1 # endif # define NOSERVICE # include # define GC_getspecific TlsGetValue # define GC_setspecific(key, v) !TlsSetValue(key, v) /* We assume 0 == success, msft does the opposite. */ # ifndef TLS_OUT_OF_INDEXES /* this is currently missing in WinCE */ # define TLS_OUT_OF_INDEXES (DWORD)0xFFFFFFFF # endif # define GC_key_create(key, d) \ ((d) != 0 || (*(key) = TlsAlloc()) == TLS_OUT_OF_INDEXES ? -1 : 0) # define GC_remove_specific(key) /* No need for cleanup on 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. */ GC_INNER void GC_init_thread_local(GC_tlfs p); /* Called when a thread is unregistered, or exits. */ /* We hold the allocator lock. */ GC_INNER 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 how to find all threads; */ /* we take care of an individual thread freelist structure. */ GC_INNER 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. No need */ /* for cleanup on thread exit. But the thread support layer makes sure */ /* that GC_thread_key is traced, if necessary. */ #endif /* THREAD_LOCAL_ALLOC */ #endif /* GC_THREAD_LOCAL_ALLOC_H */