#include "llvm/System/Threading.h"
#include "llvm/System/Atomic.h"
#include "llvm/System/Mutex.h"
#include "llvm/Config/config.h"
#include <cassert>
using namespace llvm;
static bool multithreaded_mode = false;
static sys::Mutex* global_lock = 0;
bool llvm::llvm_start_multithreaded() {
#ifdef LLVM_MULTITHREADED
assert(!multithreaded_mode && "Already multithreaded!");
multithreaded_mode = true;
global_lock = new sys::Mutex(true);
sys::MemoryFence();
return true;
#else
return false;
#endif
}
void llvm::llvm_stop_multithreaded() {
#ifdef LLVM_MULTITHREADED
assert(multithreaded_mode && "Not currently multithreaded!");
sys::MemoryFence();
multithreaded_mode = false;
delete global_lock;
#endif
}
bool llvm::llvm_is_multithreaded() {
return multithreaded_mode;
}
void llvm::llvm_acquire_global_lock() {
if (multithreaded_mode) global_lock->acquire();
}
void llvm::llvm_release_global_lock() {
if (multithreaded_mode) global_lock->release();
}