Destroy module cache data after loading completes

We do not need them afterward.

src/modules/cache.c

@@ -397,22 +397,19 @@ static int CacheLoadConfig( module_t *p_module, FILE *file )
 
 static int CacheSaveBank( FILE *file, module_cache_t *const *, size_t );
 
-/*****************************************************************************
- * SavePluginsCache: saves the plugins cache to a file
- *****************************************************************************/
+/**
+ * Saves a module cache to disk, and release cache data from memory.
+ */
 void CacheSave (vlc_object_t *p_this, const char *dir,
-                module_cache_t *const *pp_cache, size_t n)
+               module_cache_t **entries, size_t n)
 {
-    char *filename, *tmpname;
+    char *filename = NULL, *tmpname = NULL;
 
     if (asprintf (&filename, "%s"DIR_SEP CACHE_NAME, dir ) == -1)
-        return;
+        goto out;
 
     if (asprintf (&tmpname, "%s.%"PRIu32, filename, (uint32_t)getpid ()) == -1)
-    {
-        free (filename);
-        return;
-    }
+        goto out;
     msg_Dbg (p_this, "saving plugins cache %s", filename);
 
     FILE *file = vlc_fopen (tmpname, "wb");
@@ -423,7 +420,7 @@ void CacheSave (vlc_object_t *p_this, const char *dir,
         goto out;
     }
 
-    if (CacheSaveBank (file, pp_cache, n))
+    if (CacheSaveBank (file, entries, n))
     {
         msg_Warn (p_this, "cannot write %s (%m)", tmpname);
         clearerr (file);
@@ -443,6 +440,13 @@ void CacheSave (vlc_object_t *p_this, const char *dir,
 out:
     free (filename);
     free (tmpname);
+
+    for (size_t i = 0; i < n; i++)
+    {
+        free (entries[i]->path);
+        free (entries[i]);
+    }
+    free (entries);
 }
 
 static int CacheSaveConfig (FILE *, const module_t *);

src/modules/modules.c

@@ -117,8 +117,6 @@ void module_InitBank( vlc_object_t *p_this )
     {
         p_bank = calloc (1, sizeof(*p_bank));
         p_bank->i_usage = 1;
-        p_bank->i_cache = 0;
-        p_bank->pp_cache = NULL;
         p_bank->head = NULL;
 
         /* Everything worked, attach the object */
@@ -177,15 +175,6 @@ void module_EndBank( vlc_object_t *p_this, bool b_plugins )
     p_module_bank = NULL;
     vlc_mutex_unlock( &module_lock );
 
-#ifdef HAVE_DYNAMIC_PLUGINS
-    while( p_bank->i_cache-- )
-    {
-        free( p_bank->pp_cache[p_bank->i_cache]->path );
-        free( p_bank->pp_cache[p_bank->i_cache] );
-    }
-    free( p_bank->pp_cache );
-#endif
-
     while( p_bank->head != NULL )
         DeleteModule( p_bank, p_bank->head );
 
@@ -870,9 +859,8 @@ static void AllocateAllPlugins( vlc_object_t *p_this, module_bank_t *p_bank )
 static void AllocatePluginPath( vlc_object_t *p_this, module_bank_t *p_bank,
                                 const char *path, cache_mode_t mode )
 {
-    module_cache_t **cache;
+    module_cache_t **cache = NULL;
     size_t count = 0;
-    size_t offset = p_module_bank->i_cache;
 
     switch( mode )
     {
@@ -889,6 +877,8 @@ static void AllocatePluginPath( vlc_object_t *p_this, module_bank_t *p_bank,
     msg_Dbg( p_this, "recursively browsing `%s'", path );
 
     /* TODO: pass as argument, remove this hack */
+    p_bank->pp_cache = NULL;
+    p_bank->i_cache = 0;
     p_bank->pp_loaded_cache = cache;
     p_bank->i_loaded_cache = count;
     /* Don't go deeper than 5 subdirectories */
@@ -907,8 +897,7 @@ static void AllocatePluginPath( vlc_object_t *p_this, module_bank_t *p_bank,
                 }
             free( cache );
         case CACHE_RESET:
-            CacheSave( p_this, path, p_bank->pp_cache + offset,
-                       p_bank->i_cache - offset );
+            CacheSave (p_this, path, p_bank->pp_cache, p_bank->i_cache);
         case CACHE_IGNORE:
             break;
     }

src/modules/modules.h

@@ -130,7 +130,7 @@ void module_Unload (module_handle_t);
 void   CacheMerge (vlc_object_t *, module_t *, module_t *);
 void   CacheDelete(vlc_object_t *, const char *);
 size_t CacheLoad  (vlc_object_t *, const char *, module_cache_t ***);
-void   CacheSave  (vlc_object_t *, const char *, module_cache_t *const *, size_t);
+void   CacheSave  (vlc_object_t *, const char *, module_cache_t **, size_t);
 module_t *CacheFind (module_cache_t *const *, size_t,
                      const char *, const struct stat *);