Check in the right location that a mutex is provided to cond_wait

[simgrid.git] / src / kernel / activity / ConditionVariableImpl.cpp

diff --git a/src/kernel/activity/ConditionVariableImpl.cpp b/src/kernel/activity/ConditionVariableImpl.cpp
index f059db3..ec3fb6a 100644 (file)
--- a/src/kernel/activity/ConditionVariableImpl.cpp
+++ b/src/kernel/activity/ConditionVariableImpl.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007-2022. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2023. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -6,7 +6,7 @@
 #include "src/kernel/activity/ConditionVariableImpl.hpp"
 #include "src/kernel/activity/MutexImpl.hpp"
 #include "src/kernel/activity/Synchro.hpp"
-#include "src/kernel/actor/SimcallObserver.hpp"
+#include "src/kernel/actor/SynchroObserver.hpp"
 #include <cmath> // std::isfinite
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_condition, ker_synchro, "Condition variables kernel-space implementation");
@@ -35,7 +35,7 @@ void ConditionVariableImpl::signal()
 
     /* Now transform the cond wait simcall into a mutex lock one */
     actor::Simcall* simcall = &proc.simcall_;
-    const auto* observer  = dynamic_cast<kernel::actor::ConditionWaitSimcall*>(simcall->observer_);
+    const auto* observer    = dynamic_cast<kernel::actor::ConditionVariableObserver*>(simcall->observer_);
     xbt_assert(observer != nullptr);
     observer->get_mutex()->lock_async(simcall->issuer_)->wait_for(simcall->issuer_, -1);
   }
@@ -62,18 +62,18 @@ void ConditionVariableImpl::wait(MutexImpl* mutex, double timeout, actor::ActorI
   XBT_DEBUG("Wait condition %p", this);
   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 
-  /* If there is a mutex unlock it */
-  if (mutex != nullptr) {
-    xbt_assert(mutex->get_owner() == issuer,
-               "Actor %s cannot wait on ConditionVariable %p since it does not own the provided mutex %p",
-               issuer->get_cname(), this, mutex);
-    mutex_ = mutex;
-    mutex->unlock(issuer);
-  }
+  /* Unlock the provided mutex (the simcall observer ensures that one is provided, no need to check) */
+  auto* owner = mutex->get_owner();
+  xbt_assert(owner == issuer,
+             "Actor %s cannot wait on ConditionVariable %p since it does not own the provided mutex %p (which is "
+             "owned by %s).",
+             issuer->get_cname(), this, mutex, (owner == nullptr ? "nobody" : owner->get_cname()));
+  mutex_ = mutex;
+  mutex->unlock(issuer);
 
   SynchroImplPtr synchro(new SynchroImpl([this, issuer]() {
     this->remove_sleeping_actor(*issuer);
-    auto* observer = dynamic_cast<kernel::actor::ConditionWaitSimcall*>(issuer->simcall_.observer_);
+    auto* observer = dynamic_cast<kernel::actor::ConditionVariableObserver*>(issuer->simcall_.observer_);
     xbt_assert(observer != nullptr);
     observer->set_result(true);
   }));