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2a6d2a1e4b
This is the first patch in a series to replace previous_to_last with last_with_data. Currently, we can only use two partially empty chains at the end of an evbuffer, so if we have one with 511 bytes free, and another with 512 bytes free, and we try to do a 1024 byte read, we can't just stick another chain on the end: we need to reallocate the last one. That's stupid and inefficient. Instead, this patch adds a last_with_data pointer to eventually replace previous_to_last. Instead of pointing to the penultimated chain (if any) as previous_to_last does, last_with_data points to the last chain that has any data in it, if any. If all chains are empty, last_with_data points to the first chain. If there are no chains, last_with_data is NULL. The next step is to start using last_with_data everywhere that we currently use previous_to_last. When that's done, we can remove previous_to_last and the code that maintains it.
0. BUILDING AND INSTALLATION (Briefly)
$ ./configure
$ make
$ make verify # (optional)
$ sudo make install
1. BUILDING AND INSTALLATION (In Depth)
To build libevent, type
$ ./configure && make
(If you got libevent from the git repository, you will
first need to run the included "autogen.sh" script in order to
generate the configure script.)
Install as root via
# make install
You can run the regression tests by running
$ make verify
Before, reporting any problems, please run the regression tests.
To enable the low-level tracing build the library as:
CFLAGS=-DUSE_DEBUG ./configure [...]
Standard configure flags should work. In particular, see:
--disable-shared Only build static libraries
--prefix Install all files relative to this directory.
The configure script also supports the following flags:
--enable-gcc-warnings Enable extra compiler checking with GCC.
--disable-malloc-replacement
Don't let applications replace our memory
management functions
--disable-openssl Disable support for OpenSSL encryption.
--disable-thread-support Don't support multithreaded environments.
2. USEFUL LINKS:
For the latest released version of Libevent, see the official website at
http://monkey.org/~provos/libevent/ .
There's a pretty good work-in-progress manual up at
http://www.wangafu.net/~nickm/libevent-book/ .
For the latest development versions of Libevent, access our Git repository
via
"git clone git://levent.git.sourceforge.net/gitroot/levent/libevent"
You can browse the git repository online at
http://levent.git.sourceforge.net/git/gitweb-index.cgi .
To report bugs, request features, or submit patches to Libevent,
use the Sourceforge trackers at
https://sourceforge.net/tracker/?group_id=50884 .
There's also a libevent-users mailing list for talking about Libevent
use and development: http://archives.seul.org/libevent/users/
3. ACKNOWLEDGMENTS
The following people have helped with suggestions, ideas, code or
fixing bugs:
Alejo
Weston Andros Adamson
William Ahern
Stas Bekman
Ka-Hing Cheung
Andrew Danforth
Christopher Davis
Mike Davis
Shie Erlich
Alexander von Gernler
Artur Grabowski
Aaron Hopkins
Tani Hosokawa
Claudio Jeker
Valery Kyholodov
Marko Kreen
Scott Lamb
Adam Langley
Christopher Layne
Philip Lewis
David Libenzi
Moshe Litvin
Hagne Mahre
Lubomir Marinov
Nick Mathewson
James Mansion
Andrey Matveev
Caitlin Mercer
Trond Norbye
Richard Nyberg
Jon Oberheide
Phil Oleson
Dave Pacheco
Tassilo von Parseval
Pierre Phaneuf
Ryan Phillips
Jon Poland
Bert JW Regeer
Hanna Schroeter
Kevin Springborn
Ferenc Szalai
Dug Song
Zack Weinberg
Taral
propanbutan
mmadia
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