initial import of gmodule.

1 files changed, 108 insertions, 0 deletions

diff --git a/gmodule/gmodule-dl.c b/gmodule/gmodule-dl.c
new file mode 100644
index 000000000..09d4bd512
--- /dev/null
+++ b/gmodule/gmodule-dl.c
@@ -0,0 +1,108 @@
+/* GMODULE - GLIB wrapper code for dynamic module loading
+ * Copyright (C) 1998 Tim Janik
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#include <dlfcn.h>
+
+/* Perl includes <nlist.h> and <link.h> instead of <dlfcn.h> on some systmes? */
+
+
+/* dlerror() is not implemented on all systems
+ */
+#ifndef	G_MODULE_HAVE_DLERROR
+#  ifdef __NetBSD__
+#    define dlerror()	g_strerror (errno)
+#  else /* !__NetBSD__ */
+/* could we rely on errno's state here? */
+#    define dlerror()	"unknown dl-error"
+#  endif /* !__NetBSD__ */
+#endif	/* G_MODULE_HAVE_DLERROR */
+
+/* some flags are missing on some systems, so we provide
+ * harmless defaults.
+ * The Perl sources say, RTLD_LAZY needs to be defined as (1),
+ * at least for Solaris 1.
+ */
+#ifndef	RTLD_GLOBAL
+#define	RTLD_GLOBAL	0
+#endif	/* RTLD_GLOBAL */
+#ifndef	RTLD_LAZY
+#define	RTLD_LAZY	1
+#endif	/* RTLD_LAZY */
+#ifndef	RTLD_NOW
+#define	RTLD_NOW	0
+#endif	/* RTLD_NOW */
+
+
+/* --- functions --- */
+static gpointer
+_g_module_open (const gchar    *file_name,
+		gboolean        bind_lazy)
+{
+  gpointer handle;
+
+  handle = dlopen (file_name, RTLD_GLOBAL | (bind_lazy ? RTLD_LAZY : RTLD_NOW));
+  if (!handle)
+    g_module_set_error (dlerror ());
+
+  return handle;
+}
+
+static gpointer
+_g_module_self (void)
+{
+  gpointer handle;
+
+  /* to query symbols from the program itself, special link options
+   * are required on some systems.
+   */
+
+  handle = dlopen (NULL, RTLD_GLOBAL | RTLD_LAZY);
+  if (!handle)
+    g_module_set_error (dlerror ());
+
+  return handle;
+}
+
+static void
+_g_module_close (gpointer        *handle_p,
+		 gboolean         is_unref)
+{
+  /* are there any systems out there that have dlopen()/dlclose()
+   * without a reference count implementation?
+   */
+  is_unref |= 1;
+
+  if (is_unref)
+    {
+      if (dlclose (*handle_p) != 0)
+	g_module_set_error (dlerror ());
+    }
+}
+
+static gpointer
+_g_module_symbol (gpointer       *handle_p,
+		  const gchar    *symbol_name)
+{
+  gpointer p;
+
+  p = dlsym (*handle_p, symbol_name);
+  if (!p)
+    g_module_set_error (dlerror ());
+
+  return p;
+}