Revert r211121 (and r211285), "Change libclang initialization to use std::call_once instead of"
It broke mingw builder and cygwin-clang stage2, possibly lack of tls in <mutex>. llvm-svn: 211593
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@ -51,7 +51,6 @@
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#include "llvm/Support/Threading.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <mutex>
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#ifdef __APPLE__
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#include <pthread.h>
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@ -2573,8 +2572,8 @@ buildPieces(unsigned NameFlags, bool IsMemberRefExpr,
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// Misc. API hooks.
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//===----------------------------------------------------------------------===//
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static llvm::sys::Mutex LoggingMutex;
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static std::once_flag LibclangGlobalInitFlag;
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static llvm::sys::Mutex EnableMultithreadingMutex;
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static bool EnabledMultithreading;
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static void fatal_error_handler(void *user_data, const std::string& reason,
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bool gen_crash_diag) {
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@ -2584,10 +2583,6 @@ static void fatal_error_handler(void *user_data, const std::string& reason,
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::abort();
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}
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static void initializeLibClang() {
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llvm::install_fatal_error_handler(fatal_error_handler, nullptr);
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}
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extern "C" {
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CXIndex clang_createIndex(int excludeDeclarationsFromPCH,
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int displayDiagnostics) {
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@ -2596,7 +2591,15 @@ CXIndex clang_createIndex(int excludeDeclarationsFromPCH,
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if (!getenv("LIBCLANG_DISABLE_CRASH_RECOVERY"))
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llvm::CrashRecoveryContext::Enable();
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std::call_once(LibclangGlobalInitFlag, initializeLibClang);
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// Enable support for multithreading in LLVM.
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{
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llvm::sys::ScopedLock L(EnableMultithreadingMutex);
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if (!EnabledMultithreading) {
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llvm::install_fatal_error_handler(fatal_error_handler, nullptr);
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llvm::llvm_start_multithreaded();
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EnabledMultithreading = true;
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}
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}
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CIndexer *CIdxr = new CIndexer();
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if (excludeDeclarationsFromPCH)
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@ -6974,7 +6977,7 @@ Logger &cxindex::Logger::operator<<(const llvm::format_object_base &Fmt) {
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cxindex::Logger::~Logger() {
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LogOS.flush();
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llvm::sys::ScopedLock L(LoggingMutex);
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llvm::sys::ScopedLock L(EnableMultithreadingMutex);
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static llvm::TimeRecord sBeginTR = llvm::TimeRecord::getCurrentTime();
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