--- /dev/null
+/*
+ * 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 <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 {
+ 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 <windows.h>
+# 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 */
projects / hs-boehmgc.git / blobdiff