Summary:
When building applications with -Wcast-align on ARM, there are following warnings.
increases required alignment of target type warnings. This impact eina_hash_murmur3.
Reviewers: cedric, seoz
Reviewed By: cedric
CC: cedric
Differential Revision: https://phab.enlightenment.org/D317
Signed-off-by: Cedric Bail <cedric.bail@samsung.com>
Note that eina_file_dup is const from the caller perspective as it
will return a fresh "non const" Eina_File that it will be able to
manipulate as it like.
From glibc mkstemp man page:
In glibc versions 2.06 and earlier, the file is created with
permissions 0666, that is, read and write for all users. This old
behavior may be a security risk, especially since other UNIX flavors
use 0600, and somebody might overlook this detail when porting
programs. POSIX.1-2008 adds a requirement that the file be created
with mode 0600.
More generally, the POSIX specification of mkstemp() does not say
anything about file modes, so the application should make sure its
file mode creation mask (see umask(2)) is set appropriately before
calling mkstemp() (and mkostemp()).
And:
http://cwe.mitre.org/data/definitions/377.html
So current order is :
- __builtin_bswap*() for compiler that provide it
- _byteswap_*() for MSVC
- bswap_*() for older Linux and some BSD
- own C code when everything else fall appart.
The reason for this order is that the builtin will always generate
the best assembly possible. On my system bswap_*() are not changing
in all version to the best solution as they are almost equivalent to
the C macro.
This give an interesting +15% for all Eina_Hash user whatever hash function they use. The inlined
djb2 is still the fastest one and all other give very close result.
This idea was given by Lucas De Marchi's blog :
http://www.politreco.com/2013/09/optimizing-hash-table-with-kmod-as-testbed/
I do believe that rolling a crc32 implementation as a hash function should give interesting result
in our test.
This reverts commit b5fce696c7 and fixes
to NEWS and @since that came later.
These functions are pretty trivial and their functionality can be
obtained with asprintf() and snprintf. The first is not available only
on windows, but there's an implementation for that one on Evil, that
should be used instead.
global_map is set to MAP_FAILED in case of error after mmap.
So, it is initialized to MAP_FAILED and considered valid
otherwise.
So, we don't want to set the map to NULL or even check again NULL.
- Spank Cedric !!!!!
NB: How about we actually fill in "map" after allocation ??
NB: Previously we would malloc "map" and immediately exit without
filling it in, without adding it to the hash....nothing. Just allocate
and get out. Bad Frenchie !!!
Signed-off-by: Chris Michael <cp.michael@samsung.com>
Cedric Bail
Ryuan Choi
Carsten Haitzler
Cedric Bail
Jérémy Zurcher
Sebastian Dransfeld
Cedric BAIL
ChunEon Park
Tom Hacohen
Lucas De Marchi
Tae-Hwan Kim
Jorge Zapata
Jean-Philippe Andre
Daniel Juyung Seo
Chris Michael