26 
  27 #include "runtime/os.hpp"
  28 
  29 #include "gc/shenandoah/shenandoahLock.hpp"
  30 #include "runtime/atomic.hpp"
  31 #include "runtime/os.inline.hpp"
  32 #include "runtime/thread.hpp"
  33 
  34 ShenandoahSimpleLock::ShenandoahSimpleLock() {
  35   assert(os::mutex_init_done(), "Too early!");
  36 }
  37 
  38 void ShenandoahSimpleLock::lock() {
  39   _lock.lock();
  40 }
  41 
  42 void ShenandoahSimpleLock::unlock() {
  43   _lock.unlock();
  44 }
  45 




  46 ShenandoahReentrantLock::ShenandoahReentrantLock() :
  47   ShenandoahSimpleLock(), _owner(NULL), _count(0) {
  48   assert(os::mutex_init_done(), "Too early!");
  49 }
  50 
  51 ShenandoahReentrantLock::~ShenandoahReentrantLock() {
  52   assert(_count == 0, "Unbalance");
  53 }
  54 
  55 void ShenandoahReentrantLock::lock() {
  56   Thread* const thread = Thread::current();
  57   Thread* const owner = Atomic::load(&_owner);
  58 
  59   if (owner != thread) {
  60     ShenandoahSimpleLock::lock();
  61     Atomic::store(&_owner, thread);
  62   }
  63 
  64   _count++;















  65 }
  66 
  67 void ShenandoahReentrantLock::unlock() {
  68   assert(owned_by_self(), "Invalid owner");
  69   assert(_count > 0, "Invalid count");
  70 
  71   _count--;
  72 
  73   if (_count == 0) {
  74     Atomic::store(&_owner, (Thread*)NULL);
  75     ShenandoahSimpleLock::unlock();
  76   }
  77 }
  78 
  79 bool ShenandoahReentrantLock::owned_by_self() const {
  80   Thread* const thread = Thread::current();
  81   Thread* const owner = Atomic::load(&_owner);
  82   return owner == thread;
  83 }

  26 
  27 #include "runtime/os.hpp"
  28 
  29 #include "gc/shenandoah/shenandoahLock.hpp"
  30 #include "runtime/atomic.hpp"
  31 #include "runtime/os.inline.hpp"
  32 #include "runtime/thread.hpp"
  33 
  34 ShenandoahSimpleLock::ShenandoahSimpleLock() {
  35   assert(os::mutex_init_done(), "Too early!");
  36 }
  37 
  38 void ShenandoahSimpleLock::lock() {
  39   _lock.lock();
  40 }
  41 
  42 void ShenandoahSimpleLock::unlock() {
  43   _lock.unlock();
  44 }
  45 
  46 bool ShenandoahSimpleLock::try_lock() {
  47   return _lock.try_lock();
  48 }
  49 
  50 ShenandoahReentrantLock::ShenandoahReentrantLock() :
  51   ShenandoahSimpleLock(), _owner(NULL), _count(0) {
  52   assert(os::mutex_init_done(), "Too early!");
  53 }
  54 
  55 ShenandoahReentrantLock::~ShenandoahReentrantLock() {
  56   assert(_count == 0, "Unbalance");
  57 }
  58 
  59 void ShenandoahReentrantLock::lock() {
  60   Thread* const thread = Thread::current();
  61   Thread* const owner = Atomic::load(&_owner);
  62 
  63   if (owner != thread) {
  64     ShenandoahSimpleLock::lock();
  65     Atomic::store(&_owner, thread);
  66   }
  67 
  68   _count++;
  69 }
  70 
  71 bool ShenandoahReentrantLock::try_lock() {
  72   Thread* const thread = Thread::current();
  73   Thread* const owner = Atomic::load(&_owner);
  74 
  75   if (owner != thread) {
  76     if (!ShenandoahSimpleLock::try_lock()) {
  77       return false;
  78     }
  79     Atomic::store(&_owner, thread);
  80   }
  81 
  82   _count++;
  83   return true;
  84 }
  85 
  86 void ShenandoahReentrantLock::unlock() {
  87   assert(owned_by_self(), "Invalid owner");
  88   assert(_count > 0, "Invalid count");
  89 
  90   _count--;
  91 
  92   if (_count == 0) {
  93     Atomic::store(&_owner, (Thread*)NULL);
  94     ShenandoahSimpleLock::unlock();
  95   }
  96 }
  97 
  98 bool ShenandoahReentrantLock::owned_by_self() const {
  99   Thread* const thread = Thread::current();
 100   Thread* const owner = Atomic::load(&_owner);
 101   return owner == thread;
 102 }