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authorChandler Carruth <chandlerc@gmail.com>2014-06-27 15:13:01 +0000
committerChandler Carruth <chandlerc@gmail.com>2014-06-27 15:13:01 +0000
commit39ea80cc564b22f46a2ae85450fdde35e2a59e89 (patch)
tree01f3dbb8908f241972c908b4015a80a8c64d6f4a /lib/Support
parent1edaab996f5390ab596167e527001dad4e2d3439 (diff)
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Re-apply r211287: Remove support for LLVM runtime multi-threading.
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
Diffstat (limited to 'lib/Support')
-rw-r--r--lib/Support/Threading.cpp29
1 files changed, 3 insertions, 26 deletions
diff --git a/lib/Support/Threading.cpp b/lib/Support/Threading.cpp
index 2358dde0e6..ca7f3f64aa 100644
--- a/lib/Support/Threading.cpp
+++ b/lib/Support/Threading.cpp
@@ -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>