diff options
Diffstat (limited to 'gc/gc_dlopen.c')
| -rw-r--r-- | gc/gc_dlopen.c | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/gc/gc_dlopen.c b/gc/gc_dlopen.c deleted file mode 100644 index eafaa2b..0000000 --- a/gc/gc_dlopen.c +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. - * Copyright (c) 1997 by Silicon Graphics. All rights reserved. - * 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. - * - * Original author: Bill Janssen - * Heavily modified by Hans Boehm and others - */ - -/* - * This used to be in dyn_load.c. It was extracted into a separate file - * to avoid having to link against libdl.{a,so} if the client doesn't call - * dlopen. -HB - */ - -#include "private/gc_priv.h" - -# if defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS) - -# if defined(dlopen) && !defined(GC_USE_LD_WRAP) - /* To support various threads pkgs, gc.h interposes on dlopen by */ - /* defining "dlopen" to be "GC_dlopen", which is implemented below. */ - /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */ - /* real system dlopen() in their implementation. We first remove */ - /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */ -# undef dlopen -# endif - - /* Make sure we're not in the middle of a collection, and make */ - /* sure we don't start any. Returns previous value of GC_dont_gc. */ - /* This is invoked prior to a dlopen call to avoid synchronization */ - /* issues. We can't just acquire the allocation lock, since startup */ - /* code in dlopen may try to allocate. */ - /* This solution risks heap growth in the presence of many dlopen */ - /* calls in either a multithreaded environment, or if the library */ - /* initialization code allocates substantial amounts of GC'ed memory. */ - /* But I don't know of a better solution. */ - /* This can still deadlock if the client explicitly starts a GC */ - /* during the dlopen. He shouldn't do that. */ - static GC_bool disable_gc_for_dlopen() - { - GC_bool result; - LOCK(); - result = GC_dont_gc; - while (GC_incremental && GC_collection_in_progress()) { - GC_collect_a_little_inner(1000); - } - GC_dont_gc = TRUE; - UNLOCK(); - return(result); - } - - /* Redefine dlopen to guarantee mutual exclusion with */ - /* GC_register_dynamic_libraries. */ - /* Should probably happen for other operating systems, too. */ - -#include <dlfcn.h> - -#ifdef GC_USE_LD_WRAP - void * __wrap_dlopen(const char *path, int mode) -#else - void * GC_dlopen(path, mode) - GC_CONST char * path; - int mode; -#endif -{ - void * result; - GC_bool dont_gc_save; - -# ifndef USE_PROC_FOR_LIBRARIES - dont_gc_save = disable_gc_for_dlopen(); -# endif -# ifdef GC_USE_LD_WRAP - result = (void *)__real_dlopen(path, mode); -# else - result = dlopen(path, mode); -# endif -# ifndef USE_PROC_FOR_LIBRARIES - GC_dont_gc = dont_gc_save; -# endif - return(result); -} -# endif /* GC_PTHREADS || GC_SOLARIS_THREADS ... */ - - - |