r210601 - Clang changes to support LLVM removal of runtime multithreading
Zachary Turner
zturner at google.com
Tue Jun 10 16:02:10 PDT 2014
Author: zturner
Date: Tue Jun 10 18:02:10 2014
New Revision: 210601
URL: http://llvm.org/viewvc/llvm-project?rev=210601&view=rev
Log:
Clang changes to support LLVM removal of runtime multithreading
support (llvm revision r210600).
Reviewers: rnk
Differential Revision: http://reviews.llvm.org/D4077
Modified:
cfe/trunk/tools/libclang/CIndex.cpp
Modified: cfe/trunk/tools/libclang/CIndex.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/libclang/CIndex.cpp?rev=210601&r1=210600&r2=210601&view=diff
==============================================================================
--- cfe/trunk/tools/libclang/CIndex.cpp (original)
+++ cfe/trunk/tools/libclang/CIndex.cpp Tue Jun 10 18:02:10 2014
@@ -2556,8 +2556,8 @@ buildPieces(unsigned NameFlags, bool IsM
// Misc. API hooks.
//===----------------------------------------------------------------------===//
-static llvm::sys::Mutex EnableMultithreadingMutex;
-static bool EnabledMultithreading;
+static llvm::sys::Mutex LoggingMutex;
+static std::once_flag InstalledErrorHandlerFlag;
static void fatal_error_handler(void *user_data, const std::string& reason,
bool gen_crash_diag) {
@@ -2575,15 +2575,8 @@ CXIndex clang_createIndex(int excludeDec
if (!getenv("LIBCLANG_DISABLE_CRASH_RECOVERY"))
llvm::CrashRecoveryContext::Enable();
- // Enable support for multithreading in LLVM.
- {
- llvm::sys::ScopedLock L(EnableMultithreadingMutex);
- if (!EnabledMultithreading) {
- llvm::install_fatal_error_handler(fatal_error_handler, nullptr);
- llvm::llvm_start_multithreaded();
- EnabledMultithreading = true;
- }
- }
+ std::call_once(InstalledErrorHandlerFlag,
+ []() {llvm::install_fatal_error_handler(fatal_error_handler, nullptr);});
CIndexer *CIdxr = new CIndexer();
if (excludeDeclarationsFromPCH)
@@ -6959,7 +6952,7 @@ Logger &cxindex::Logger::operator<<(cons
cxindex::Logger::~Logger() {
LogOS.flush();
- llvm::sys::ScopedLock L(EnableMultithreadingMutex);
+ llvm::sys::ScopedLock L(LoggingMutex);
static llvm::TimeRecord sBeginTR = llvm::TimeRecord::getCurrentTime();
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