add way to lock portion of plugin buffer for TSR plugins

Some things in core that should probably be plugins steal the plugin buffer
for their own use, TSR plugins have no way to detect or prevent this
lock buffer reserves buffer_size bytes directly after the plugin itself
returns the unreserved bytes still available from the plugin buffer

Change-Id: I5a7849e209129b09400036a594569ef396b1b85f

1 files changed, 2 insertions, 0 deletions

diff --git a/apps/plugin.h b/apps/plugin.h
index de1077c9b4..2e0ace2e48 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -49,6 +49,7 @@
 
 char* strncpy(char *, const char *, size_t);
 void* plugin_get_buffer(size_t *buffer_size);
+size_t plugin_reserve_buffer(size_t buffer_size);
 int plugin_open(const char *plugin, const char *parameter);
 
 #ifndef __PCTOOL__
@@ -935,6 +936,7 @@ struct plugin_api {
     void (*onplay_show_playlist_menu)(const char* path, void (*playlist_insert_cb));
     void (*queue_remove_from_head)(struct event_queue *q, long id);
     int (*core_set_keyremap)(struct button_mapping* core_keymap, int count);
+    size_t (*plugin_reserve_buffer)(size_t buffer_size);
 };
 
 /* plugin header */