In the client, string_get() can cause a remapping of the
strings index & mempool. This means that all pointers to
string data are invalid past that call.
Solution: add a safe_get() function that prevents remap
during search. It might prove faster also, but will
return NULL more often.
SIGTERM and SIGQUIT don't need to be caught.
the proper signal to ask cserve2 to exit cleanly is SIGINT.
enlightenment_start (or systemd) should be responsible for
restarting in case of crash / unexpected termination.
cserve2 will not restart if killed with signal SIGINT,
as it will then exit with return code 0 (normal)
These operations have tons of side effects and it's a lot
easier to just avoid doing them. Now, repacking will always
need to happen as applications will add/delete strings and
items, but the less frequent, the better :)
Also, align most arrays & mempools to 32K instead of the
default page size (4K). This will also reduce resizes.
Try to reconnect to cserve2 if the socket connection was lost.
Resend some messages if necessary.
Images reload seems to be working.
Actually, the images don't change over time, so the clients just
keep the previous references to their images.
FONT RELOAD IS NOT WORKING:
- Crashes
- Invalid glyph data
- Infinite loop in _glyph_map_remap_check()
Root cause:
When new glyphs are requested from the server, they are added to
the mempool. So it is necessary to remap the font.
Unfortunately, in case of server reboot, we did not keep the mempool
so the old glyphs that were not requested again will not be valid.
Simply call the appropriate cache2 functions when possible
and check for usage of cache2 whenever an evas_cache_ function
is called.
This effectively adds cserve2 image (data) load support for the
GL engines. Fonts were already working out-of-the-box.
cserve2 does not support animated Gifs, as the animated icon
logic doesn't match cserve2 logic.
Also, there is probably no need to cache these into shared
buffers anyways :)
Solution: fallback to normal cache (and delete current entry in
the client)
Be more careful when selecting the original image for scaling.
Most load opts must remain the same, only smooth can be toyed with.
Also, fix alpha when scaling.
Let's reuse the logic from scalecache and call cserve2
functions when the scalecache should be used.
So, now, cserve2 server will not scale any image... This is
too computationally intensive for the server's main thread.
This is not optimal but makes a hell of a lot more sense for
the moment. (since cserve2 manages the SHM segments)
High-level problem:
cserve2 does not support load_opts properly when opening an image.
As a result, when (pre)loading a JPEG file with specific load
options (eg. w, h, region and orientation), the image buffer might
have the wrong dimensions.
So, we need to use load_opts when computing file hash key.
And, pass these load options to the loader slave,
and use them while OPENING the image. This will set
properly the geometry.
Fixes test "Preload and Prescale" in elementary_test.
Pass around "animated" flag for images that can be animated.
Fallback to local cache if the image is animated.
Implementing support for animated images in cserve2 does
not seem to make a lot of sense considering each frame must
be requested independently in real time,... and to be honest
there doesn't seem to be any valid use case anyway :)
cserve2 can't handle virtual files (mmap-only), by design.
Proper support can be added later on, but for now we might want
to just fallback to the normal cache functions.
Fixes photocam test
Images and Files can be discovered by the client scanner before they
are valid (aka. loaded or opened). We want clients to ignore all
shared objects that are not ready yet, as they are in an undefined
state (values and memory might be invalid).
Shared string indexes are not repacked, since they live in a
memory pool (where the indexes can be reused).
So, the index in the table is equal to their ID. Add initial
test to check if the item at index n has the ID n.
Use tags such as INDX, FONT, IMAG, FILE.
These can help debugging and for robustness, as they will
be visible in the memory dump.
Update generation_id after repack as well
Also, print shared arrays usage as it is sent as first message
upon connection to the server.
Add fonts to LRU and flush LRU as needed.
Seems to work okay. Could probably be finetuned a bit.
- Create one Glyph_Data array per Font_Entry
- Copy Font_Source descriptors in shared array
- Copy font entries in shared index
- Send font index path over socket
- Merge Font_Source and Font_Data in shared memory
- Send font index path on client connect
- Repack font index after free
- Pass font shm name to clients
Jean-Philippe Andre