#ifndef LLVM_SUPPORT_THREADING_H
#define LLVM_SUPPORT_THREADING_H
-#if !defined(__MINGW__)
-#include <mutex>
-#endif
-
namespace llvm {
/// Returns true if LLVM is compiled with support for multi-threading, and
/// false otherwise.
/// the thread stack.
void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
unsigned RequestedStackSize = 0);
-
-/// \brief Execute the function specified as a template parameter once.
-///
-/// Calls \p UserFn once ever. The call uniqueness is based on the address of
-/// the function passed in via the template arguement. This means no matter how
-/// many times you call llvm_call_once<foo>() in the same or different
-/// locations, foo will only be called once.
-///
-/// Typical usage:
-/// \code
-/// void foo() {...};
-/// ...
-/// llvm_call_once<foo>();
-/// \endcode
-///
-/// \tparam UserFn Function to call once.
-template <void (*UserFn)(void)> void llvm_call_once() {
-#if !defined(__MINGW__)
- static std::once_flag flag;
- std::call_once(flag, UserFn);
-#else
- struct InitOnceWrapper {
- InitOnceWrapper() { UserFn(); }
- };
- static InitOnceWrapper InitOnceVar;
-#endif
-}
}
#endif
#include "llvm/Support/Atomic.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/MutexGuard.h"
-#include "llvm/Support/Threading.h"
#include <cassert>
using namespace llvm;
static const ManagedStaticBase *StaticList = nullptr;
-static sys::Mutex *ManagedStaticMutex = nullptr;
-static void initializeMutex() {
- ManagedStaticMutex = new sys::Mutex();
-}
-
-static sys::Mutex* getManagedStaticMutex() {
+static sys::Mutex& getManagedStaticMutex() {
// We need to use a function local static here, since this can get called
// during a static constructor and we need to guarantee that it's initialized
// correctly.
- llvm_call_once<initializeMutex>();
+ static sys::Mutex ManagedStaticMutex;
return ManagedStaticMutex;
}
void (*Deleter)(void*)) const {
assert(Creator);
if (llvm_is_multithreaded()) {
- MutexGuard Lock(*getManagedStaticMutex());
+ MutexGuard Lock(getManagedStaticMutex());
if (!Ptr) {
void* tmp = Creator();
/// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
void llvm::llvm_shutdown() {
- {
- MutexGuard Lock(*getManagedStaticMutex());
-
- while (StaticList)
- StaticList->destroy();
- }
+ MutexGuard Lock(getManagedStaticMutex());
- delete ManagedStaticMutex;
- ManagedStaticMutex = nullptr;
+ while (StaticList)
+ StaticList->destroy();
}