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Re-apply r211287: Remove support for LLVM runtime multi-threading.

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I'll fix the problems in libclang and other projects in ways that don't
require <mutex> until we sort out the cygwin situation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211900 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2014-06-27 15:13:01 +00:00
parent 1edaab996f
commit 39ea80cc56
7 changed files with 17 additions and 99 deletions
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29
lib/Support/Threading.cpp
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@ -7,7 +7,8 @@
//
//===----------------------------------------------------------------------===//
//
// This file implements llvm_start_multithreaded() and friends.
// This file defines helper functions for running LLVM in a multi-threaded
// environment.
//
//===----------------------------------------------------------------------===//
@ -19,38 +20,14 @@
using namespace llvm;
static bool multithreaded_mode = false;
bool llvm::llvm_start_multithreaded() {
bool llvm::llvm_is_multithreaded() {
#if LLVM_ENABLE_THREADS != 0
assert(!multithreaded_mode && "Already multithreaded!");
multithreaded_mode = true;
// We fence here to ensure that all initialization is complete BEFORE we
// return from llvm_start_multithreaded().
sys::MemoryFence();
return true;
#else
return false;
#endif
}
void llvm::llvm_stop_multithreaded() {
#if LLVM_ENABLE_THREADS != 0
assert(multithreaded_mode && "Not currently multithreaded!");
// We fence here to insure that all threaded operations are complete BEFORE we
// return from llvm_stop_multithreaded().
sys::MemoryFence();
multithreaded_mode = false;
#endif
}
bool llvm::llvm_is_multithreaded() {
return multithreaded_mode;
}
#if LLVM_ENABLE_THREADS != 0 && defined(HAVE_PTHREAD_H)
#include <pthread.h>