generic-library/cxx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
1,059 Commits 43 Branches 0 Tags
Commit Graph

20 Commits

Author SHA1 Message Date
Howard Hinnant
39213641f4 Debug mode for unordered_set. I believe this to be fairly complete for 
unordered_set, however it is not complete yet for unordered_multiset,
unordered_map or unordered_multimap.  There has been a lot of work done
for these other three containers, however that work was done just to
keep all of the tests passing.

You can try this out with -D_LIBCPP_DEBUG2.  You will have to link to a
libc++.dylib that has been compiled with src/debug.cpp.  So far, vector
(but not vector<bool>), list, and unordered_set are treated.  I hope to
get the other three unordered containers up fairly quickly now that
unordered_set is done.

The flag _LIBCPP_DEBUG2 will eventually be changed to _LIBCPP_DEBUG, but
not today.  This is my second effort at getting debug mode going for
libc++, and I'm not quite yet ready to throw all of the work under the
first attempt away.

The basic design is that all of the debug information is kept in a
central database, instead of in the containers.  This has been done as
an attempt to have debug mode and non-debug mode be ABI compatible with
each other.  There are some circumstances where if you construct a
container in an environment without debug mode and pass it into debug
mode, the checking will get confused and let you know with a readable
error message.  Passing containers the other way: from debug mode out to
a non-debugging mode container should be 100% safe (at least that is the
goal).

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@186991 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-23 22:01:58 +00:00
Howard Hinnant
9b128e06ed Remove implicit conversion from __value_type to value_type in [unordered_][multi]map. This fixes http://llvm.org/bugs/show_bug.cgi?id=16549 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185711 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-05 18:06:00 +00:00
Howard Hinnant
b66e1c3f96 Removed extension in [unordered_][multi]map which allowed one to emplace using just an argument for the key, as opposed to using piecewise_construct. However a bug report exposed that this created an unfortunate ambiguity. People who are currently using the extension will be notified the next time they compile, and will have to change to using piecewise_construct. There are no ABI issues with the removal of this extension. This fixes http://llvm.org/bugs/show_bug.cgi?id=16542 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185666 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-04 20:59:16 +00:00
Howard Hinnant
e008d4eecc Simplify comparators of [unordered_][multi]map. This fixes http://llvm.org/bugs/show_bug.cgi?id=16538 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185665 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-07-04 19:46:35 +00:00
Howard Hinnant
7a6b7cedcb Implement full support for non-pointer types in custom allocators. This is for the unordered containers only. This work still needs to be done on the sequence containers. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@184635 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-06-22 15:21:29 +00:00
Marshall Clow
83e2c4d877 Move common header files into a 'support' directory; make 'testit' include -I to that directory; rename 'iterators.h' to 'iterator_test.h'; remove hard-coded paths to include files from more than 350 source files 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@171594 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-05 03:21:01 +00:00
Marshall Clow
ba1920fe4b Removed several more different 'iterators.h' files in libcxx/test 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@171452 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-03 02:29:29 +00:00
Howard Hinnant
7a44515588 This commit establishes a new bucket_count policy in the unordered containers: The policy now allows a power-of-2 number of buckets to be requested (and that request honored) by the client. And if the number of buckets is set to a power of 2, then the constraint of the hash to the number of buckets uses & instead of %. If the client does not specify a number of buckets, then the policy remains unchanged: a prime number of buckets is selected. The growth policy is that the number of buckets is roughly doubled when needed. While growing, either the prime, or the power-of-2 strategy will be preserved. There is a small run time cost for putting in this switch. For very cheap hash functions, e.g. identity for int, the cost can be as high as 18%. However with more typical use cases, e.g. strings, the cost is in the noise level. I've measured cases with very cheap hash functions (int) that using a power-of-2 number of buckets can make look up about twice as fast. However I've also noted that a power-of-2 number of buckets is more susceptible to accidental catastrophic collisions. Though I've also noted that accidental catastrophic collisions are also possible when using a prime number of buckets (but seems far less likely). In short, this patch adds an extra tuning knob for those clients trying to get the last bit of performance squeezed out of their hash containers. Casual users of the hash containers will not notice the introduction of this tuning knob. Those clients who swear by power-of-2 hash containers can now opt-in to that strategy. Clients who prefer a prime number of buckets can continue as they have. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@159836 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-06 17:31:14 +00:00
Howard Hinnant
635ce1d127 The rules for emplace in map, multimap, unordered_map and unordered_multimap changed a while back and I'm just now updating to these new rules. In a nutshell, you've got to know you're emplacing to a pair and use one of pair's constructors. I made one extension: If you want to emplace the key and default construct the mapped_type, you can just emplace(key), as opposed to emplace(piecewise_construct, forward_as_tuple(key), forward_as_tuple()). 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@157503 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-05-25 22:04:21 +00:00
Howard Hinnant
f836d531b4 unord test fixes by Edward Meewis 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@145707 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-02 21:23:14 +00:00
Howard Hinnant
e3e3291f3a Fixed PR10574: http://llvm.org/bugs/show_bug.cgi?id=10574 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@137522 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-12 21:56:02 +00:00
Howard Hinnant
04dae1df22 noexcept for <unordered_set>. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@132647 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-04 20:18:37 +00:00
Howard Hinnant
5f2f14c5d2 noexcept for <unordered_map>. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@132646 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-04 18:54:24 +00:00
Howard Hinnant
211f0ee1be Bug 9096 - list::iterator not default constructible 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@124508 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-28 23:46:28 +00:00
Howard Hinnant
b64f8b07c1 license change 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-16 22:09:02 +00:00
Howard Hinnant
0d5dff1897 Fix two test bugs 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@116515 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-14 21:08:32 +00:00
Howard Hinnant
73d21a4f07 Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113086 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-04 23:28:19 +00:00
Howard Hinnant
6046aced82 Fixing whitespace problems 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111755 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-22 00:15:28 +00:00
Howard Hinnant
f5256e16df Wiped out some non-ascii characters that snuck into the copyright. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-11 21:36:01 +00:00
Howard Hinnant
bc8d3f97eb libcxx initial import 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-11 19:42:16 +00:00