gboolean
gegl_tile_backend_file_unlock (GeglTileBackendFile *self)
{
if (!(self->header.flags & GEGL_FLAG_LOCKED))
{
g_warning ("tried to unlock unlocked buffer");
return FALSE;
}
self->header.flags -= GEGL_FLAG_LOCKED;
gegl_tile_backend_file_write_header (self);
fsync (self->o);
return TRUE;
}
static gpointer
gegl_tile_backend_file_flush (GeglTileSource *source,
GeglTile *tile,
gint x,
gint y,
gint z)
{
GeglTileBackend *backend;
GeglTileBackendFile *self;
GList *tiles;
backend = GEGL_TILE_BACKEND (source);
self = GEGL_TILE_BACKEND_FILE (backend);
gegl_tile_backend_file_ensure_exist (self);
GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "flushing %s", self->path);
self->header.rev ++;
self->header.next = self->next_pre_alloc; /* this is the offset
we start handing
out headers from*/
tiles = g_hash_table_get_keys (self->index);
if (tiles == NULL)
self->header.next = 0;
else
{
GList *iter;
for (iter = tiles; iter; iter = iter->next)
{
GeglBufferItem *item = iter->data;
gegl_tile_backend_file_write_block (self, &item->block);
}
gegl_tile_backend_file_write_block (self, NULL); /* terminate the index */
g_list_free (tiles);
}
gegl_tile_backend_file_write_header (self);
#if HAVE_GIO
g_output_stream_flush (self->o, NULL, NULL);
#else
fsync (self->o);
#endif
GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "flushed %s", self->path);
return (gpointer)0xf0f;
}
gboolean
gegl_tile_backend_file_try_lock (GeglTileBackendFile *self)
{
GeglBufferHeader new_header;
new_header = gegl_buffer_read_header (self->i, NULL)->header;
if (new_header.flags & GEGL_FLAG_LOCKED)
{
return FALSE;
}
self->header.flags += GEGL_FLAG_LOCKED;
gegl_tile_backend_file_write_header (self);
fsync (self->o);
return TRUE;
}
gboolean
gegl_tile_backend_file_unlock (GeglTileBackendFile *self)
{
if (!(self->header.flags & GEGL_FLAG_LOCKED))
{
g_warning ("tried to unlock unlocked buffer");
return FALSE;
}
self->header.flags -= GEGL_FLAG_LOCKED;
gegl_tile_backend_file_write_header (self);
#if HAVE_GIO
g_output_stream_flush (self->o, NULL, NULL);
#else
fsync (self->o);
#endif
return TRUE;
}
gboolean
gegl_tile_backend_file_try_lock (GeglTileBackendFile *self)
{
GeglBufferHeader new_header;
new_header = gegl_buffer_read_header (self->i, NULL)->header;
if (new_header.flags & GEGL_FLAG_LOCKED)
{
return FALSE;
}
self->header.flags += GEGL_FLAG_LOCKED;
gegl_tile_backend_file_write_header (self);
#if HAVE_GIO
g_output_stream_flush (self->o, NULL, NULL);
#else
fsync (self->o);
#endif
return TRUE;
}
static void
gegl_tile_backend_file_ensure_exist (GeglTileBackendFile *self)
{
if (!self->exist)
{
GeglTileBackend *backend;
self->exist = TRUE;
backend = GEGL_TILE_BACKEND (self);
GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "creating swapfile %s", self->path);
self->o = g_open (self->path, O_RDWR|O_CREAT, 0770);
if (self->o == -1)
g_warning ("%s: Could not open '%s': %s", G_STRFUNC, self->path, g_strerror (errno));
self->next_pre_alloc = 256; /* reserved space for header */
self->total = 256; /* reserved space for header */
self->foffset = 0;
gegl_buffer_header_init (&self->header,
backend->priv->tile_width,
backend->priv->tile_height,
backend->priv->px_size,
backend->priv->format
);
gegl_tile_backend_file_write_header (self);
self->foffset = 256;
fsync (self->o);
self->i = dup (self->o);
/*self->i = G_INPUT_STREAM (g_file_read (self->file, NULL, NULL));*/
self->next_pre_alloc = 256; /* reserved space for header */
self->total = 256; /* reserved space for header */
g_assert (self->i != -1);
g_assert (self->o != -1);
}
}
static void
gegl_tile_backend_file_ensure_exist (GeglTileBackendFile *self)
{
if (!self->exist)
{
GeglTileBackend *backend;
#if HAVE_GIO
GError *error = NULL;
if (self->io)
{
g_print ("we already existed\n");
return;
}
#endif
self->exist = TRUE;
backend = GEGL_TILE_BACKEND (self);
GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "creating swapfile %s", self->path);
#if HAVE_GIO
self->o = G_OUTPUT_STREAM (g_file_replace (self->file, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL));
g_output_stream_flush (self->o, NULL, NULL);
g_output_stream_close (self->o, NULL, NULL);
self->io = G_IO_STREAM (g_file_open_readwrite (self->file, NULL, &error));
if (error)
{
g_warning ("%s: %s", G_STRLOC, error->message);
g_error_free (error);
error = NULL;
}
self->o = g_io_stream_get_output_stream (self->io);
self->i = g_io_stream_get_input_stream (self->io);
#else
self->o = open (self->path, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
#endif
self->next_pre_alloc = 256; /* reserved space for header */
self->total = 256; /* reserved space for header */
#if HAVE_GIO
g_assert(g_seekable_seek (G_SEEKABLE (self->o), 256, G_SEEK_SET, NULL, NULL));
#endif
gegl_buffer_header_init (&self->header,
backend->priv->tile_width,
backend->priv->tile_height,
backend->priv->px_size,
backend->priv->format
);
gegl_tile_backend_file_write_header (self);
#if HAVE_GIO
g_output_stream_flush (self->o, NULL, NULL);
#else
fsync (self->o);
self->i = dup (self->o);
#endif
/*self->i = G_INPUT_STREAM (g_file_read (self->file, NULL, NULL));*/
self->next_pre_alloc = 256; /* reserved space for header */
self->total = 256; /* reserved space for header */
#if HAVE_GIO
g_assert (self->io);
g_assert (self->i);
g_assert (self->o);
#else
g_assert (self->i != -1);
g_assert (self->o != -1);
#endif
}
}
