summaryrefslogtreecommitdiffstats
path: root/apps/filetypes.c
diff options
context:
space:
mode:
authorThomas Martitz <kugel@rockbox.org>2011-08-30 14:01:45 +0000
committerThomas Martitz <kugel@rockbox.org>2011-08-30 14:01:45 +0000
commitbaa070cca6d459a7c5aed81f29e4cc4f6c7410b3 (patch)
tree5123360aea420b96e4a97a8e88cf51b4277152d9 /apps/filetypes.c
parentd0b72e25903574acb1cf9184a6052cdd646dbc37 (diff)
downloadrockbox-baa070cca6d459a7c5aed81f29e4cc4f6c7410b3.tar.gz
rockbox-baa070cca6d459a7c5aed81f29e4cc4f6c7410b3.zip
GSoC/Buflib: Enable compaction in buflib.
This enables the ability to allocate (and free) memory dynamically without fragmentation, through compaction. This means allocations can move and fragmentation be reduced. Most changes are preparing Rockbox for this, which many times means adding a move callback which can temporarily disable movement when the corresponding code is in a critical section. For now, the audio buffer allocation has a central role, because it's the one having allocated most. This buffer is able to shrink itself, for which it needs to stop playback for a very short moment. For this, audio_buffer_available() returns the size of the audio buffer which can possibly be used by other allocations because the audio buffer can shrink. lastfm scrobbling and timestretch can now be toggled at runtime without requiring a reboot. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30381 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/filetypes.c')
-rw-r--r--apps/filetypes.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/apps/filetypes.c b/apps/filetypes.c
index c52c734a1d..942ff329fe 100644
--- a/apps/filetypes.c
+++ b/apps/filetypes.c
@@ -184,6 +184,26 @@ static unsigned char highest_attr = 0;
static int viewer_count = 0;
static int strdup_handle, strdup_bufsize, strdup_cur_idx;
+static int move_callback(int handle, void* current, void* new)
+{
+ /*could compare to strdup_handle, but ops is only used once */
+ (void)handle;
+ size_t diff = new - current;
+#define FIX_PTR(x) \
+ { if ((void*)x > current && (void*)x < (current+strdup_bufsize)) x+= diff; }
+ for(int i = 0; i < filetype_count; i++)
+ {
+ FIX_PTR(filetypes[i].extension);
+ FIX_PTR(filetypes[i].plugin);
+ }
+ return BUFLIB_CB_OK;
+}
+
+static struct buflib_callbacks ops = {
+ .move_callback = move_callback,
+ .shrink_callback = NULL,
+};
+
static char *filetypes_strdup(char* string)
{
char *buffer = core_get_data(strdup_handle) + strdup_cur_idx;
@@ -323,7 +343,7 @@ void filetype_init(void)
return;
strdup_bufsize = filesize(fd);
- strdup_handle = core_alloc("filetypes", strdup_bufsize);
+ strdup_handle = core_alloc_ex("filetypes", strdup_bufsize, &ops);
if (strdup_handle <= 0)
return;
read_builtin_types();