compat: implement tdestroy (GNU extension not available on OpenBSD).

compat/tdestroy.c

+/*****************************************************************************
+ * tdestroy.c: GNU tdestroy() replacement
+ *****************************************************************************
+ * Copyright  1998-2009 the VideoLAN project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <search.h>
+
+typedef struct node_t
+{
+    void        *key;
+    struct node_t *left, *right;
+} node;
+
+static void tdestroy_recurse (node *root, __free_fn_t freefct)
+{
+    if (root->left != NULL)
+        tdestroy_recurse (root->left, freefct);
+    if (root->right != NULL)
+        tdestroy_recurse (root->right, freefct);
+    (*freefct) ((void *) root->key);
+    /* Free the node itself.  */
+    free (root);
+}
+
+void tdestroy (void *vroot, __free_fn_t freefct)
+{
+    node *root = (node *) vroot;
+    if (root != NULL) {
+        tdestroy_recurse (root, freefct);
+    }
+}
+

configure.ac

@@ -582,7 +582,7 @@ need_libc=false
 dnl Check for usual libc functions
 AC_CHECK_FUNCS([gettimeofday isatty sigrelse getpwuid_r memalign posix_memalign if_nametoindex getenv putenv setenv ctime_r daemon fork lstat posix_fadvise posix_madvise uselocale])
 AC_CHECK_FUNCS(fcntl)
-AC_REPLACE_FUNCS([asprintf atof atoll getcwd getpid gmtime_r lldiv localtime_r rewind strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll vasprintf swab])
+AC_REPLACE_FUNCS([asprintf atof atoll getcwd getpid gmtime_r lldiv localtime_r rewind strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll vasprintf swab tdestroy])
 AC_CHECK_FUNCS([stricmp strnicmp])
 AC_CHECK_FUNCS(fdatasync,,
   [AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])

include/vlc_fixups.h

@@ -204,4 +204,9 @@ static inline locale_t newlocale(int mask, const char * locale, locale_t base)
 void swab (const void *, void *, ssize_t);
 #endif
 
+#ifndef HAVE_TDESTROY
+typedef void (*__free_fn_t) (void *__nodep);
+void tdestroy (void *vroot, __free_fn_t freefct);
+#endif
+
 #endif /* !LIBVLC_FIXUPS_H */