#ifndef LLVM_SUPPORT_THREADING_H
#define LLVM_SUPPORT_THREADING_H
+#include "llvm/Config/llvm-config.h"
+#include "llvm/Support/Compiler.h"
+#include <mutex>
+
namespace llvm {
- /// llvm_start_multithreaded - Allocate and initialize structures needed to
- /// make LLVM safe for multithreading. The return value indicates whether
- /// multithreaded initialization succeeded. LLVM will still be operational
- /// on "failed" return, and will still be safe for hosting threading
- /// applications in the JIT, but will not be safe for concurrent calls to the
- /// LLVM APIs.
- /// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
- bool llvm_start_multithreaded();
-
- /// llvm_stop_multithreaded - Deallocate structures necessary to make LLVM
- /// safe for multithreading.
- /// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
- void llvm_stop_multithreaded();
-
- /// llvm_is_multithreaded - Check whether LLVM is executing in thread-safe
- /// mode or not.
+
+#if LLVM_ENABLE_THREADS != 0
+ typedef std::mutex mutex;
+ typedef std::recursive_mutex recursive_mutex;
+#else
+ class null_mutex {
+ public:
+ void lock() { }
+ void unlock() { }
+ bool try_lock() { return true; }
+ };
+ typedef null_mutex mutex;
+ typedef null_mutex recursive_mutex;
+#endif
+
+ /// llvm_get_global_lock() - returns the llvm global lock object.
+ llvm::recursive_mutex &llvm_get_global_lock();
+
+ /// llvm_is_multithreaded() - returns true if LLVM is compiled with support
+ /// for multiple threads, and false otherwise.
bool llvm_is_multithreaded();
-
- /// acquire_global_lock - Acquire the global lock. This is a no-op if called
- /// before llvm_start_multithreaded().
- void llvm_acquire_global_lock();
-
- /// release_global_lock - Release the global lock. This is a no-op if called
- /// before llvm_start_multithreaded().
- void llvm_release_global_lock();
+
+ /// llvm_execute_on_thread - Execute the given \p UserFn on a separate
+ /// thread, passing it the provided \p UserData.
+ ///
+ /// This function does not guarantee that the code will actually be executed
+ /// on a separate thread or honoring the requested stack size, but tries to do
+ /// so where system support is available.
+ ///
+ /// \param UserFn - The callback to execute.
+ /// \param UserData - An argument to pass to the callback function.
+ /// \param RequestedStackSize - If non-zero, a requested size (in bytes) for
+ /// the thread stack.
+ void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
+ unsigned RequestedStackSize = 0);
}
#endif