fix mutex_trylock bug

[c11tester.git] / futex.cc

diff --git a/futex.cc b/futex.cc
index fa32e9a28d4a4bbab28dee48813dc15ea42d58f1..677b4afd9fe29740aacd604566d8811da833d06f 100644 (file)
--- a/futex.cc
+++ b/futex.cc
@@ -2,7 +2,7 @@
 
 // Copyright (C) 2015-2019 Free Software Foundation, Inc.
 //
-// This is a reimplementation of libstdc++-v3/src/c++11/futex.cc. 
+// This is a reimplementation of libstdc++-v3/src/c++11/futex.cc.
 
 #include <bits/atomic_futex.h>
 #ifdef _GLIBCXX_HAS_GTHREADS
@@ -26,27 +26,27 @@ const unsigned futex_wake_op = 1;
 
 namespace std _GLIBCXX_VISIBILITY(default)
 {
-_GLIBCXX_BEGIN_NAMESPACE_VERSION
+       _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
        bool
        __atomic_futex_unsigned_base::_M_futex_wait_until(unsigned *__addr,
-               unsigned __val,
-               bool __has_timeout, chrono::seconds __s, chrono::nanoseconds __ns)
+                                                                                                                                                                                                               unsigned __val,
+                                                                                                                                                                                                               bool __has_timeout, chrono::seconds __s, chrono::nanoseconds __ns)
        {
                // do nothing if the two values are not equal
                if ( *__addr != __val ) {
                        return true;
                }
 
-               // if a timeout is specified, return immedialy. Letting the scheduler decide how long this thread will wait.  
+               // if a timeout is specified, return immedialy. Letting the scheduler decide how long this thread will wait.
                if (__has_timeout) {
                        return true;
                }
 
                ModelExecution *execution = model->get_execution();
 
-               cdsc::condition_variable *v = new cdsc::condition_variable();
-               cdsc::mutex *m = new cdsc::mutex();
+               cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
+               cdsc::snapmutex *m = new cdsc::snapmutex();
 
                execution->getCondMap()->put( (pthread_cond_t *) __addr, v);
                execution->getMutexMap()->put( (pthread_mutex_t *) __addr, m);
@@ -61,10 +61,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
                // INT_MAX wakes all the waiters at the address __addr
                ModelExecution *execution = model->get_execution();
                cdsc::condition_variable *v = execution->getCondMap()->get( (pthread_cond_t *) __addr);
+
+               if (v == NULL)
+                       return;// do nothing
+
                v->notify_all();
        }
 
-_GLIBCXX_END_NAMESPACE_VERSION
+       _GLIBCXX_END_NAMESPACE_VERSION
 }
-#endif // defined(_GLIBCXX_HAVE_LINUX_FUTEX) && ATOMIC_INT_LOCK_FREE > 1
-#endif // _GLIBCXX_HAS_GTHREADS
+#endif // defined(_GLIBCXX_HAVE_LINUX_FUTEX) && ATOMIC_INT_LOCK_FREE > 1
+#endif // _GLIBCXX_HAS_GTHREADS