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09-Jun-2016 |
Dan Austin <danielaustin@google.com> |
Revert "Revert "Update aosp/master libcxx rebase to r263688""
This reverts commit 1d4a1edbc7e4461b59239e1b8297e9dd395a6322.
Change-Id: I2909937fe582f2c5552bc86e7f4d2d5cff0de0aa
/external/libcxx/test/support/cmpxchg_loop.h
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| 1d4a1edbc7e4461b59239e1b8297e9dd395a6322 |
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26-May-2016 |
Dan Albert <danalbert@google.com> |
Revert "Update aosp/master libcxx rebase to r263688"
The world is burning.
This reverts commit c004fd909c006eec55077c52ee119e1fa338c9e9, reversing
changes made to 1418e4163da4bb0b9e3fe496e51c23a0dce399d9.
/external/libcxx/test/support/cmpxchg_loop.h
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| fa1e5db3bc5f3a1a730455c8100850248b94c1ec |
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19-Jan-2016 |
Eric Fiselier <eric@efcs.ca> |
Add missing license headers
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@258196 91177308-0d34-0410-b5e6-96231b3b80d8
/external/libcxx/test/support/cmpxchg_loop.h
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| 7ba3c57565e6658d8265b028a61c5731cf899495 |
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06-Sep-2014 |
Dan Albert <danalbert@google.com> |
PR20546: Fix tests for compare_exchange_weak.
These calls are allowed to fail spuriously.
29.6.5.25:
Remark: A weak compare-and-exchange operation may fail spuriously.
That is, even when the contents of memory referred to by expected
and object are equal, it may return false and store back to expected
the same memory contents that were originally there. [ Note: This
spurious failure enables implementation of compare and-exchange on a
broader class of machines, e.g., load-locked store-conditional
machines. A consequence of spurious failure is that nearly all uses
of weak compare-and-exchange will be in a loop.
To fix this, we replace any assert() that expects
std::atomic::compare_exchange_weak() to return true with a loop. If the
call does not return true within N runs (with N currently equal to 10),
then the test fails.
http://llvm.org/bugs/show_bug.cgi?id=20546
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@217319 91177308-0d34-0410-b5e6-96231b3b80d8
/external/libcxx/test/support/cmpxchg_loop.h
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