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author | Benjamin Kramer <benny.kra@googlemail.com> | 2014-03-03 17:53:30 +0000 |
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committer | Benjamin Kramer <benny.kra@googlemail.com> | 2014-03-03 17:53:30 +0000 |
commit | 4721e55a0c2e749cba4f91aa584508284ff67d2c (patch) | |
tree | 7ee6c143079fc5ad8ae985013a56b8d381a19918 /lib/Support/ManagedStatic.cpp | |
parent | 59a451775954483bc4db825d8f9eb660b7c96a06 (diff) | |
download | llvm-4721e55a0c2e749cba4f91aa584508284ff67d2c.tar.gz llvm-4721e55a0c2e749cba4f91aa584508284ff67d2c.tar.bz2 llvm-4721e55a0c2e749cba4f91aa584508284ff67d2c.tar.xz |
[C++11] Replace LLVM atomics with std::atomic.
With C++11 we finally have a standardized way to specify atomic operations. Use
them to replace the existing custom implemention. Sadly the translation is not
entirely trivial as std::atomic allows more fine-grained control over the
atomicity. I tried to preserve the old semantics as well as possible.
Differential Revision: http://llvm-reviews.chandlerc.com/D2915
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202730 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/ManagedStatic.cpp')
-rw-r--r-- | lib/Support/ManagedStatic.cpp | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/Support/ManagedStatic.cpp b/lib/Support/ManagedStatic.cpp index 098cccb68d..c19f8cb485 100644 --- a/lib/Support/ManagedStatic.cpp +++ b/lib/Support/ManagedStatic.cpp @@ -13,7 +13,6 @@ #include "llvm/Support/ManagedStatic.h" #include "llvm/Config/config.h" -#include "llvm/Support/Atomic.h" #include <cassert> using namespace llvm; @@ -28,7 +27,7 @@ void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(), void* tmp = Creator ? Creator() : 0; TsanHappensBefore(this); - sys::MemoryFence(); + std::atomic_thread_fence(std::memory_order_seq_cst); // This write is racy against the first read in the ManagedStatic // accessors. The race is benign because it does a second read after a |