From de3e2e7efc982b316227c96dcab57293922b1e26 Mon Sep 17 00:00:00 2001
From: Fred Bauer <fred.w.bauer@gmail.com>
Date: Fri, 14 Oct 2011 20:35:52 +0000
Subject: Remove font_reset() which tried to fetch font *pfs from uninitiaized
 buflib_allocations. Change handle locking to track number of locks applied.
 Remove some duplicated code from internal_load_font()

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30752 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/font.c | 28 +++++++---------------------
 1 file changed, 7 insertions(+), 21 deletions(-)

diff --git a/firmware/font.c b/firmware/font.c
index dfc8aba..577fb8a 100644
--- a/firmware/font.c
+++ b/firmware/font.c
@@ -77,7 +77,7 @@ extern struct font sysfont;
 
 struct buflib_alloc_data {
     struct font font;
-    bool handle_locked; /* is the buflib handle currently locked? */
+    int handle_locks; /* is the buflib handle currently locked? */
     int refcount;       /* how many times has this font been loaded? */
     unsigned char buffer[];
 };
@@ -90,7 +90,7 @@ static int buflibmove_callback(int handle, void* current, void* new)
     struct buflib_alloc_data *alloc = (struct buflib_alloc_data*)current;
     ptrdiff_t diff = new - current;
 
-    if (alloc->handle_locked)
+    if (alloc->handle_locks > 0)
         return BUFLIB_CB_CANNOT_MOVE;
 
 #define UPDATE(x) if (x) { x = PTR_ADD(x, diff); }
@@ -111,7 +111,10 @@ static int buflibmove_callback(int handle, void* current, void* new)
 static void lock_font_handle(int handle, bool lock)
 {
     struct buflib_alloc_data *alloc = core_get_data(handle);
-    alloc->handle_locked = lock;
+    if ( lock )
+        alloc->handle_locks++;
+    else
+        alloc->handle_locks--;
 }
 
 static struct buflib_callbacks buflibops = {buflibmove_callback, NULL };
@@ -342,15 +345,6 @@ static struct font* font_load_cached(struct font* pf)
     return pf;
 }
 
-static void font_reset(int font_id)
-{
-    struct font *pf = pf_from_handle(buflib_allocations[font_id]);
-    // fixme
-    memset(pf, 0, sizeof(struct font));
-    pf->fd = -1;
-}
-
-
 static bool internal_load_font(int font_id, const char *path,
                                char *buf, size_t buf_size,
                                int handle
@@ -358,13 +352,6 @@ static bool internal_load_font(int font_id, const char *path,
 {
     size_t size;
     struct font* pf = pf_from_handle(handle);
-    /* save loaded glyphs */
-    glyph_cache_save(pf);
-    /* Close font file handle */
-    if (pf->fd >= 0)
-        close(pf->fd);
-
-    font_reset(font_id);
 
     /* open and read entire font file*/
     pf->fd = open(path, O_RDONLY|O_BINARY);
@@ -455,8 +442,7 @@ static int alloc_and_init(int font_idx, const char* name, size_t size)
         return handle;
     pdata = core_get_data(handle);
     pf = &pdata->font;
-    font_reset(font_idx);
-    pdata->handle_locked = false;
+    pdata->handle_locks = 0;
     pdata->refcount = 1;
     pf->buffer_position = pf->buffer_start = buffer_from_handle(handle);
     pf->buffer_size = size;
-- 
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