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Andy Green 16ab3185c4 replace per header mallocs with single malloc 3 level struct
This big patch replaces the malloc / realloc per header
approach used until now with a single three-level struct
that gets malloc'd during the header union phase and freed
in one go when we transition to a different union phase.

It's more expensive in that we malloc a bit more than 4Kbytes,
but it's a lot cheaper in terms of malloc, frees, heap fragmentation,
no reallocs, nothing to configure.  It also moves from arrays of
pointers (8 bytes on x86_64) to unsigned short offsets into the
data array, (2 bytes on all platforms).

The 3-level thing is all in one struct

 - array indexed by the header enum, pointing to first "fragment" index
	(ie, header type to fragment lookup, or 0 for none)

 - array of fragments indexes, enough for 2 x the number of known headers
	(fragment array... note that fragments can point to a "next"
	fragment if the same header is spread across multiple entries)

 - linear char array where the known header payload gets written
	(fragments point into null-terminated strings stored in here,
	only the known header content is stored)

http headers can legally be split over multiple headers of the same
name which should be concatenated.  This scheme does not linearly
conatenate them but uses a linked list in the fragment structs to
link them.  There are apis to get the total length and copy out a
linear, concatenated version to a buffer.

Signed-off-by: Andy Green <andy.green@linaro.org>
2013-02-11 11:10:57 +08:00
cmake CMake support + fixed windows build. 2013-02-06 15:49:12 +09:00
lib replace per header mallocs with single malloc 3 level struct 2013-02-11 11:10:57 +08:00
m4 add empty m4 dir as workaround for autoreconf issue 2013-01-15 21:56:12 +08:00
scripts refactor-into-dirs.patch 2010-11-01 09:12:17 +00:00
test-server replace per header mallocs with single malloc 3 level struct 2013-02-11 11:10:57 +08:00
win32port remove deprecated vcxproj 2013-02-07 20:25:28 +08:00
.gitignore add static stack analysis 2013-02-10 10:49:15 +08:00
autogen.sh use autogen.sh 2012-10-06 15:17:01 +08:00
changelog replace per header mallocs with single malloc 3 level struct 2013-02-11 11:10:57 +08:00
CMakeLists.txt Added build instructions for CMake. 2013-02-07 20:24:19 +08:00
config.h.cmake Added some minor changes to CMake build file. 2013-02-06 15:49:12 +09:00
configure.ac stop O2 override 2013-02-11 09:31:43 +08:00
COPYING add-COPYING-lgpl-2.1.patch 2010-11-08 17:12:19 +00:00
INSTALL add-INSTALL.patch 2010-11-12 13:11:50 +00:00
libwebsockets-api-doc.html introduce keepalive option and make common socket options function 2013-02-09 14:27:38 +08:00
libwebsockets.pc.in add pkg-config file libwebsockets.pc 2012-10-19 18:26:22 +08:00
libwebsockets.spec uplevel-rpm-spec-to-include-new-extpoll-sample.patch 2011-02-13 09:08:11 +00:00
LICENSE add static linking exception to LICENSE 2013-02-07 23:44:21 +08:00
Makefile.am introduce library version plus git hash 2013-02-01 10:50:15 +08:00
README add README 2013-02-06 16:07:27 +09:00
README.build replace per header mallocs with single malloc 3 level struct 2013-02-11 11:10:57 +08:00
README.coding dont try set per socket keepalive timing on bsds 2013-02-10 09:39:47 +08:00
README.test-apps introduce test echo 2013-01-30 12:28:44 +08:00

This is the libwebsockets C library for lightweight websocket clients and
servers.  For support, visit

 http://libwebsockets.org

and consider joining the project mailing list at

 http://ml.libwebsockets.org/mailman/listinfo/libwebsockets

You can get the latest version of the library from git

http://git.libwebsockets.org
https://github.com/warmcat/libwebsockets

for more information:

README.build      - information on building the library
README.coding     - information for writing code using the library
README.test-apps  - information about the test apps built with the library