Have llvm_start_multithreaded return a bool indicating whether multithreaded
initialization succeeded or not, rather than just asserting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72182 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/Support/ManagedStatic.h b/include/llvm/Support/ManagedStatic.h
index 7eecce3..619cc20 100644
--- a/include/llvm/Support/ManagedStatic.h
+++ b/include/llvm/Support/ManagedStatic.h
@@ -96,8 +96,10 @@
/// llvm_start_multithreaded - Allocate and initialize structures needed to
-/// make LLVM safe for multithreading.
-void llvm_start_multithreaded();
+/// make LLVM safe for multithreading. The return value indicates whether
+/// multithreaded initialization succeeded. LLVM will still be operational
+/// on "failed" return, but will not be safe to run multithreaded.
+bool llvm_start_multithreaded();
/// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
void llvm_shutdown();
diff --git a/lib/Support/ManagedStatic.cpp b/lib/Support/ManagedStatic.cpp
index 056b6c0..a3b2bcc 100644
--- a/lib/Support/ManagedStatic.cpp
+++ b/lib/Support/ManagedStatic.cpp
@@ -68,12 +68,13 @@
DeleterFn = 0;
}
-void llvm::llvm_start_multithreaded() {
+bool llvm::llvm_start_multithreaded() {
#if LLVM_MULTITHREADED
assert(ManagedStaticMutex == 0 && "Multithreaded LLVM already initialized!");
ManagedStaticMutex = new sys::Mutex(true);
+ return true;
#else
- assert(0 && "LLVM built without multithreading support!");
+ return false;
#endif
}