apr_dir: no need to allocate our dir entry if readdir{,64}_r() is not used.

git-svn-id: http://svn.apache.org/repos/asf/apr/apr/trunk@1856196 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 14 insertions, 9 deletions

diff --git a/file_io/unix/dir.c b/file_io/unix/dir.c
index f5fd461b6..b2dd95513 100644
--- a/file_io/unix/dir.c
+++ b/file_io/unix/dir.c
@@ -75,14 +75,6 @@ static char *path_remove_last_component (const char *path, apr_pool_t *pool)
 apr_status_t apr_dir_open(apr_dir_t **new, const char *dirname, 
                           apr_pool_t *pool)
 {
-    /* On some platforms (e.g., Linux+GNU libc), d_name[] in struct 
-     * dirent is declared with enough storage for the name.  On other
-     * platforms (e.g., Solaris 8 for Intel), d_name is declared as a
-     * one-byte array.  Note: gcc evaluates this at compile time.
-     */
-    apr_size_t dirent_size = 
-        sizeof(*(*new)->entry) +
-        (sizeof((*new)->entry->d_name) > 1 ? 0 : NAME_MAX);
     DIR *dir = opendir(dirname);
 
     if (!dir) {
@@ -94,7 +86,20 @@ apr_status_t apr_dir_open(apr_dir_t **new, const char *dirname,
     (*new)->pool = pool;
     (*new)->dirname = apr_pstrdup(pool, dirname);
     (*new)->dirstruct = dir;
-    (*new)->entry = apr_pcalloc(pool, dirent_size);
+
+#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) \
+                    && !defined(READDIR_IS_THREAD_SAFE)
+    /* On some platforms (e.g., Linux+GNU libc), d_name[] in struct 
+     * dirent is declared with enough storage for the name.  On other
+     * platforms (e.g., Solaris 8 for Intel), d_name is declared as a
+     * one-byte array.  Note: gcc evaluates this at compile time.
+     */
+    (*new)->entry = apr_pcalloc(pool, sizeof(*(*new)->entry) +
+                                      (sizeof((*new)->entry->d_name) > 1
+                                       ? 0 : NAME_MAX));
+#else
+    (*new)->entry = NULL;
+#endif
 
     apr_pool_cleanup_register((*new)->pool, *new, dir_cleanup,
                               apr_pool_cleanup_null);