This rather large commit changes the way modules are loaded.

As partly documented in loader.c and include/asterisk/module.h,
modules are now expected to return all of their methods and flags
into a structure 'mod_data', and are normally loaded with RTLD_NOW
| RTLD_LOCAL, so symbols are resolved immediately and conflicts
should be less likely.  Only in a small number of cases (res_*,
typically) modules are loaded RTLD_GLOBAL, so they can export
symbols.
 
The core of the change is only the two files loader.c and
include/asterisk/module.h, all the rest is simply adaptation of the
existing modules to the new API, a rather mechanical (but believe
me, time and finger-consuming!) process whose detail you can figure
out by svn diff'ing any single module.

Expect some minor compilation issue after this change, please
report it on mantis http://bugs.digium.com/view.php?id=6968
so we collect all the feedback in one place.

I am just sorry that this change missed SVN version number 20000!



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@20003 65c4cc65-6c06-0410-ace0-fbb531ad65f3

formats/format_vox.c

@@ -121,8 +121,6 @@ static off_t vox_tell(struct ast_filestream *fs)
      return offset; 
 }
 
-static struct ast_format_lock me = { .usecnt = -1 };
-
 static const struct ast_format vox_f = {
 	.name = "vox",
 	.exts = "vox",
@@ -133,30 +131,27 @@ static const struct ast_format vox_f = {
 	.tell = vox_tell,
 	.read = vox_read,
 	.buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
-	.lockp = &me,
+	.module = &mod_data, /* XXX */
 };
 
-int load_module()
+static int load_module(void *mod)
 {
 	return ast_format_register(&vox_f);
 }
 
-int unload_module()
+static int unload_module(void *mod)
 {
 	return ast_format_unregister(vox_f.name);
 }	
 
-int usecount()
-{
-	return me.usecnt;
-}
-
-const char *description()
+static const char *description(void)
 {
 	return "Dialogic VOX (ADPCM) File Format";
 }
 
-const char *key()
+static const char *key(void)
 {
 	return ASTERISK_GPL_KEY;
 }
+
+STD_MOD1;