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gst/gstregistrybinary.*: Implement no-mmap alternative for registry reading. Do code cleanups.
Original commit message from CVS: * gst/gstregistrybinary.c: (gst_registry_binary_write_cache), (gst_registry_binary_load_pad_template), (gst_registry_binary_load_plugin), (gst_registry_binary_read_cache): * gst/gstregistrybinary.h: Implement no-mmap alternative for registry reading. Do code cleanups. Add more comments about avoiding strdups for all text data. Comments welcome.
This commit is contained in:
Stefan Kost
parent
96438b7b4f
commit
14999bf0f5
11
ChangeLog
11
ChangeLog
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@ -1,3 +1,14 @@
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2007-04-26 Stefan Kost <ensonic@users.sf.net>
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* gst/gstregistrybinary.c: (gst_registry_binary_write_cache),
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(gst_registry_binary_load_pad_template),
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(gst_registry_binary_load_plugin),
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(gst_registry_binary_read_cache):
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* gst/gstregistrybinary.h:
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Implement no-mmap alternative for registry reading. Do code cleanups.
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Add more comments about avoiding strdups for all text data. Comments
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welcome.
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2007-04-25 Stefan Kost <ensonic@users.sf.net>
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* gst/gstregistrybinary.h (GstBinaryPluginElement,
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@ -24,9 +24,14 @@
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/* FIXME:
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* - Add random key to libgstreamer during build and only accept registry,
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* if key matches (or is the version check enough)
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* - handle cases where we can't mmap
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* - keep registry binary blob and reference strings
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* (need const flags in GstPlugin, etc.)
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* - don't free/unmmap contents when leaving gst_registry_binary_read_cache()
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* - free at gst_deinit() / _priv_gst_registry_cleanup() ?
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* - GstPlugin:
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* - GST_PLUGIN_FLAG_CONST
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* -GstPluginFeature, GstIndexFactory, GstElementFactory
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* - needs Flags (GST_PLUGIN_FEATURE_FLAG_CONST)
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* - can we turn loaded into flag?
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* - why do we collect a list of binary chunks and not write immediately
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* - because we need to process subchunks, before we can set e.g. nr_of_items
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* in parent chunk
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@ -58,7 +63,7 @@
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#include <gst/gstregistrybinary.h>
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#include <glib/gstdio.h> /* for g_stat() */
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#include <glib/gstdio.h> /* for g_stat(), g_mapped_file(), ... */
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#define GST_CAT_DEFAULT GST_CAT_REGISTRY
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@ -81,6 +86,7 @@
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# define align32(_ptr) do {} while(0)
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#endif
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/* Registry saving */
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/*
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@ -117,6 +123,7 @@ gst_registry_binary_write (GstRegistry * registry, const void *mem,
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return TRUE;
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}
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/*
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* gst_registry_binary_initialize_magic:
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*
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@ -135,6 +142,7 @@ gst_registry_binary_initialize_magic (GstBinaryRegistryMagic * m)
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return TRUE;
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}
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/*
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* gst_registry_binary_save_string:
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*
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@ -156,6 +164,7 @@ gst_registry_binary_save_string (GList ** list, gchar * str)
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return TRUE;
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}
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/*
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* gst_registry_binary_save_data:
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*
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@ -176,6 +185,7 @@ gst_registry_binary_make_data (gpointer data, gulong size)
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return chunk;
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}
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/*
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* gst_registry_binary_save_pad_template:
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*
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@ -206,6 +216,7 @@ gst_registry_binary_save_pad_template (GList ** list,
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return TRUE;
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}
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/*
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* gst_registry_binary_save_feature:
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*
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@ -343,6 +354,7 @@ fail:
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return FALSE;
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}
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/*
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* gst_registry_binary_save_plugin:
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*
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@ -405,6 +417,7 @@ fail:
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return FALSE;
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}
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/**
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* gst_registry_binary_write_cache:
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*
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@ -414,7 +427,7 @@ gboolean
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gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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{
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GList *walk;
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char *tmp_location;
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gchar *tmp_location;
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GstBinaryRegistryMagic *magic;
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GstBinaryChunk *magic_chunk;
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GList *to_write = NULL;
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@ -426,7 +439,7 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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registry->cache_file = g_mkstemp (tmp_location);
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if (registry->cache_file == -1) {
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char *dir;
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gchar *dir;
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/* oops, I bet the directory doesn't exist */
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dir = g_path_get_dirname (location);
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@ -522,6 +535,7 @@ fail:
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return FALSE;
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}
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/* Registry loading */
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/*
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@ -562,6 +576,7 @@ gst_registry_binary_check_magic (gchar ** in)
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return TRUE;
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}
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/*
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* gst_registry_binary_load_pad_template:
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*
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@ -579,7 +594,6 @@ gst_registry_binary_load_pad_template (GstElementFactory * factory, gchar ** in)
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GST_DEBUG ("Reading/casting for GstBinaryPadTemplate at address %p", *in);
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unpack_element (*in, pt, GstBinaryPadTemplate);
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template = g_new0 (GstStaticPadTemplate, 1);
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template->presence = pt->presence;
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template->direction = pt->direction;
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@ -594,6 +608,7 @@ gst_registry_binary_load_pad_template (GstElementFactory * factory, gchar ** in)
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return TRUE;
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}
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/*
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* gst_registry_binary_load_feature:
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*
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@ -741,6 +756,7 @@ fail:
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return FALSE;
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}
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/*
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* gst_registry_binary_load_plugin:
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*
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@ -774,6 +790,7 @@ gst_registry_binary_load_plugin (GstRegistry * registry, gchar ** in)
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plugin = g_object_new (GST_TYPE_PLUGIN, NULL);
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/* TODO: also set GST_PLUGIN_FLAG_CONST */
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plugin->flags |= GST_PLUGIN_FLAG_CACHED;
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plugin->file_mtime = pe->file_mtime;
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plugin->file_size = pe->file_size;
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@ -829,6 +846,7 @@ gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
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gdouble seconds;
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gsize size;
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GError *err = NULL;
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gboolean res = FALSE;
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/* make sure these types exist */
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GST_TYPE_ELEMENT_FACTORY;
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@ -841,30 +859,35 @@ gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
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mapped = g_mapped_file_new (location, FALSE, &err);
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if (err != NULL) {
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GST_INFO ("Unable to mmap file: %s", err->message);
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GST_INFO ("Unable to mmap file %s : %s", location, err->message);
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g_error_free (err);
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return FALSE;
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}
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err = NULL;
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if ((contents = g_mapped_file_get_contents (mapped)) == NULL) {
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GST_ERROR ("Can't load file %s : %s", location, g_strerror (errno));
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g_mapped_file_free (mapped);
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return FALSE;
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g_file_get_contents (location, &contents, &size, &err);
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if (err != NULL) {
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GST_INFO ("Unable to read file %s : %s", location, err->message);
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g_error_free (err);
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return FALSE;
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}
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} else {
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if ((contents = g_mapped_file_get_contents (mapped)) == NULL) {
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GST_ERROR ("Can't load file %s : %s", location, g_strerror (errno));
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goto Error;
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}
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/* check length for header */
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size = g_mapped_file_get_length (mapped);
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}
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/* in is a cursor pointer, we initialize it with the begin of registry and is updated on each read */
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in = contents;
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GST_DEBUG ("File mapped at address %p", in);
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/* check length for header */
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size = g_mapped_file_get_length (mapped);
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GST_DEBUG ("File data at address %p", in);
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if (size < sizeof (GstBinaryRegistryMagic)) {
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GST_INFO ("No or broken registry header");
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return FALSE;
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GST_ERROR ("No or broken registry header");
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goto Error;
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}
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/* check if header is valid */
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if (!gst_registry_binary_check_magic (&in)) {
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GST_ERROR ("Binary registry type not recognized (invalid magic)");
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g_mapped_file_free (mapped);
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return FALSE;
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goto Error;
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}
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/* check if there are plugins in the file */
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@ -872,18 +895,18 @@ gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
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if (!(((size_t) in + sizeof (GstBinaryPluginElement)) <
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(size_t) contents + size)) {
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GST_INFO ("No binary plugins structure to read");
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return TRUE; /* empty file, this is not an error */
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}
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for (;
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((size_t) in + sizeof (GstBinaryPluginElement)) <
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(size_t) contents + size;) {
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GST_INFO ("reading binary registry %" G_GSIZE_FORMAT "(%x)/%"
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G_GSIZE_FORMAT, (size_t) in - (size_t) contents,
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(guint) ((size_t) in - (size_t) contents), size);
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if (!gst_registry_binary_load_plugin (registry, &in)) {
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GST_ERROR ("Problem while reading binary registry");
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return FALSE;
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/* empty file, this is not an error */
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} else {
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for (;
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((size_t) in + sizeof (GstBinaryPluginElement)) <
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(size_t) contents + size;) {
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GST_INFO ("reading binary registry %" G_GSIZE_FORMAT "(%x)/%"
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G_GSIZE_FORMAT, (size_t) in - (size_t) contents,
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(guint) ((size_t) in - (size_t) contents), size);
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if (!gst_registry_binary_load_plugin (registry, &in)) {
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GST_ERROR ("Problem while reading binary registry");
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goto Error;
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}
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}
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}
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@ -893,6 +916,14 @@ gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
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GST_INFO ("loaded %s in %lf seconds", location, seconds);
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g_mapped_file_free (mapped);
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return TRUE;
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res = TRUE;
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/* TODO: once we re-use the pointers to registry contents return here */
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Error:
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if (mapped) {
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g_mapped_file_free (mapped);
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} else {
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g_free (contents);
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}
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return res;
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}
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@ -25,7 +25,6 @@
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** ====================
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** - Use a compressed registry, but would induce performance loss
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** - Encrypt the registry, for security purpose, but would also reduce performances
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** - Also have a non-mmap based cache reading (work with file descriptors)
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*/
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#ifndef __GST_REGISTRYBINARY_H__
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