Merge pull request #7156 from RetroSven/master

 push save state into background for cores that need the emulator to be running during serialization

Author: inactive123

Diff for: tasks/task_save.c

@@ -555,6 +555,33 @@ static void task_save_handler_finished(retro_task_t *task,
    free(state);
 }
 
+void* get_serialized_data(const char *path, size_t serial_size)
+{
+   retro_ctx_serialize_info_t serial_info;
+   bool ret    = false;
+   void *data  = NULL;
+
+   data = malloc(serial_size);
+
+   if (!data)
+      return NULL;
+
+   RARCH_LOG("%s: %d %s.\n",
+         msg_hash_to_str(MSG_STATE_SIZE),
+         (int)serial_size,
+         msg_hash_to_str(MSG_BYTES));
+
+   serial_info.data = data;
+   serial_info.size = serial_size;
+   ret              = core_serialize(&serial_info);
+   if ( !ret )
+   {
+      free(data) ;
+      return NULL ;
+   }
+   return data ;
+}
+
 /**
  * task_save_handler:
  * @task : the task being worked on
@@ -576,9 +603,22 @@ static void task_save_handler(retro_task_t *task)
          return;
    }
 
+   if (!state->data)
+   {
+      state->data = get_serialized_data(state->path, state->size) ;
+   }
+
    remaining       = MIN(state->size - state->written, SAVE_STATE_CHUNK);
-   written         = (int)intfstream_write(state->file,
-         (uint8_t*)state->data + state->written, remaining);
+
+   if ( state->data )
+   {
+      written         = (int)intfstream_write(state->file,
+            (uint8_t*)state->data + state->written, remaining);
+   }
+   else
+   {
+      written = 0 ;
+   }
 
    state->written += written;
 
@@ -1134,6 +1174,7 @@ static void task_push_load_and_save_state(const char *path, void *data,
       free(task);
 }
 
+
 /**
  * content_save_state:
  * @path      : path of saved state that shall be written to.
@@ -1144,85 +1185,62 @@ static void task_push_load_and_save_state(const char *path, void *data,
  **/
 bool content_save_state(const char *path, bool save_to_disk, bool autosave)
 {
-   retro_ctx_serialize_info_t serial_info;
+   //retro_ctx_serialize_info_t serial_info;
    retro_ctx_size_info_t info;
    bool ret    = false;
    void *data  = NULL;
 
    core_serialize_size(&info);
 
-   RARCH_LOG("%s: \"%s\".\n",
-         msg_hash_to_str(MSG_SAVING_STATE),
-         path);
-
-   if (info.size == 0)
-      return false;
-
-   data = malloc(info.size);
-
-   if (!data)
-      return false;
-
-   RARCH_LOG("%s: %d %s.\n",
-         msg_hash_to_str(MSG_STATE_SIZE),
-         (int)info.size,
-         msg_hash_to_str(MSG_BYTES));
-
-   serial_info.data = data;
-   serial_info.size = info.size;
-   ret              = core_serialize(&serial_info);
-
-   if (ret)
+   if (save_to_disk)
    {
-      if (save_to_disk)
+      if (filestream_exists(path) && !autosave)
       {
-         if (filestream_exists(path) && !autosave)
-         {
-            /* Before overwritting the savestate file, load it into a buffer
-            to allow undo_save_state() to work */
-            /* TODO/FIXME - Use msg_hash_to_str here */
-            RARCH_LOG("%s ...\n",
-                  msg_hash_to_str(MSG_FILE_ALREADY_EXISTS_SAVING_TO_BACKUP_BUFFER));
+         /* Before overwritting the savestate file, load it into a buffer
+         to allow undo_save_state() to work */
+         /* TODO/FIXME - Use msg_hash_to_str here */
+         RARCH_LOG("%s ...\n",
+               msg_hash_to_str(MSG_FILE_ALREADY_EXISTS_SAVING_TO_BACKUP_BUFFER));
 
-            task_push_load_and_save_state(path, data, info.size, true, autosave);
-         }
-         else
-            task_push_save_state(path, data, info.size, autosave);
+         task_push_load_and_save_state(path, data, info.size, true, autosave);
       }
       else
+         task_push_save_state(path, data, info.size, autosave);
+   }
+   else
+   {
+      data = get_serialized_data(path, info.size) ;
+      if ( data == NULL )
       {
-         /* save_to_disk is false, which means we are saving the state
-         in undo_load_buf to allow content_undo_load_state() to restore it */
-
-         /* If we were holding onto an old state already, clean it up first */
-         if (undo_load_buf.data)
-         {
-            free(undo_load_buf.data);
-            undo_load_buf.data = NULL;
-         }
+         RARCH_ERR("%s \"%s\".\n",
+               msg_hash_to_str(MSG_FAILED_TO_SAVE_STATE_TO),
+               path);
+         return false ;
+      }
+      /* save_to_disk is false, which means we are saving the state
+      in undo_load_buf to allow content_undo_load_state() to restore it */
 
-         undo_load_buf.data = malloc(info.size);
-         if (!undo_load_buf.data)
-         {
-            free(data);
-            return false;
-         }
+      /* If we were holding onto an old state already, clean it up first */
+      if (undo_load_buf.data)
+      {
+         free(undo_load_buf.data);
+         undo_load_buf.data = NULL;
+      }
 
-         memcpy(undo_load_buf.data, data, info.size);
+      undo_load_buf.data = malloc(info.size);
+      if (!undo_load_buf.data)
+      {
          free(data);
-         undo_load_buf.size = info.size;
-         strlcpy(undo_load_buf.path, path, sizeof(undo_load_buf.path));
+         return false;
       }
-   }
-   else
-   {
+
+      memcpy(undo_load_buf.data, data, info.size);
       free(data);
-      RARCH_ERR("%s \"%s\".\n",
-            msg_hash_to_str(MSG_FAILED_TO_SAVE_STATE_TO),
-            path);
+      undo_load_buf.size = info.size;
+      strlcpy(undo_load_buf.path, path, sizeof(undo_load_buf.path));
    }
 
-   return ret;
+   return true;
 }
 
 /**