Convert a number of allocations to use buflib pinning

Several places in the codebase implemented an ad-hoc form of pinning;
they can be converted to use buflib pinning instead.

Change-Id: I4450be007e80f6c9cc9f56c2929fa4b9b85ebff3

2 files changed, 9 insertions, 21 deletions

diff --git a/apps/gui/skin_engine/skin_backdrops.c b/apps/gui/skin_engine/skin_backdrops.c
index 1def0812da..215667d585 100644
--- a/apps/gui/skin_engine/skin_backdrops.c
+++ b/apps/gui/skin_engine/skin_backdrops.c
@@ -41,7 +41,6 @@ static struct skin_backdrop {
 } backdrops[NB_BDROPS];
 
 #define NB_BDROPS SKINNABLE_SCREENS_COUNT*NB_SCREENS
-static int handle_being_loaded;
 static int current_lcd_backdrop[NB_SCREENS];
 
 bool skin_backdrop_get_debug(int index, char **path, int *ref_count, size_t *size)
@@ -65,8 +64,8 @@ bool skin_backdrop_get_debug(int index, char **path, int *ref_count, size_t *siz
 
 static int buflib_move_callback(int handle, void* current, void* new)
 {
-    if (handle == handle_being_loaded)
-        return BUFLIB_CB_CANNOT_MOVE;
+    (void)handle;
+
     for (int i=0; i<NB_BDROPS; i++)
     {
         if (backdrops[i].buffer == current)
@@ -96,7 +95,6 @@ bool skin_backdrop_init(void)
         }
         FOR_NB_SCREENS(i)
             current_lcd_backdrop[i] = -1;
-        handle_being_loaded = -1;
         first_go = false;
     }
     return go_status;
@@ -182,16 +180,16 @@ bool skin_backdrops_preload(void)
                     backdrops[i].buffer = core_get_data(backdrops[i].buflib_handle);
                     if (strcmp(filename, BACKDROP_BUFFERNAME))
                     {
-                        handle_being_loaded = backdrops[i].buflib_handle;
+                        core_pin(backdrops[i].buflib_handle);
                         backdrops[i].loaded =
                                 screens[screen].backdrop_load(filename, backdrops[i].buffer);
+                        core_unpin(backdrops[i].buflib_handle);
                         if (!backdrops[i].loaded)
                         {
                             core_free(backdrops[i].buflib_handle);
                             backdrops[i].buflib_handle = -1;
                             retval = false;
                         }
-                        handle_being_loaded = -1;
                     }
                     else
                         backdrops[i].loaded = true;
@@ -295,12 +293,12 @@ void skin_backdrop_load_setting(void)
                         return;
                 }
                 bool loaded;
+                core_pin(backdrops[i].buflib_handle);
                 backdrops[i].buffer = core_get_data(backdrops[i].buflib_handle);
-                handle_being_loaded = backdrops[i].buflib_handle;
                 loaded = screens[SCREEN_MAIN].backdrop_load(
                                                    global_settings.backdrop_file,
                                                    backdrops[i].buffer);
-                handle_being_loaded = -1;
+                core_unpin(backdrops[i].buflib_handle);
                 backdrops[i].name[2] = loaded ? '.' : '\0';
                 backdrops[i].loaded = loaded;
                 return;
diff --git a/apps/gui/skin_engine/skin_parser.c b/apps/gui/skin_engine/skin_parser.c
index 047c4735a0..2eef2af7c0 100644
--- a/apps/gui/skin_engine/skin_parser.c
+++ b/apps/gui/skin_engine/skin_parser.c
@@ -1870,13 +1870,11 @@ static void skin_data_reset(struct wps_data *wps_data)
 }
 
 #ifndef __PCTOOL__
-static int currently_loading_handle = -1;
 static int buflib_move_callback(int handle, void* current, void* new)
 {
+    (void)handle;
     (void)current;
     (void)new;
-    if (handle == currently_loading_handle)
-        return BUFLIB_CB_CANNOT_MOVE;
     /* Any active skins may be scrolling - which means using viewports which
      * will be moved after this callback returns. This is a hammer to make that
      * safe. TODO: use a screwdriver instead.
@@ -1890,14 +1888,6 @@ static int buflib_move_callback(int handle, void* current, void* new)
     return BUFLIB_CB_OK;
 }
 static struct buflib_callbacks buflib_ops = {buflib_move_callback, NULL, NULL};
-static void lock_handle(int handle)
-{
-    currently_loading_handle = handle;
-}
-static void unlock_handle(void)
-{
-    currently_loading_handle = -1;
-}
 #endif
 
 static int load_skin_bmp(struct wps_data *wps_data, struct bitmap *bitmap, char* bmpdir)
@@ -1944,12 +1934,12 @@ static int load_skin_bmp(struct wps_data *wps_data, struct bitmap *bitmap, char*
     _stats->buflib_handles++;
     _stats->images_size += buf_size;
     lseek(fd, 0, SEEK_SET);
-    lock_handle(handle);
+    core_pin(handle);
     bitmap->data = core_get_data(handle);
     int ret = read_bmp_fd(fd, bitmap, buf_size, format, NULL);
     bitmap->data = NULL; /* do this to force a crash later if the
                             caller doesnt call core_get_data() */
-    unlock_handle();
+    core_unpin(handle);
     close(fd);
     if (ret > 0)
     {