Upgrade Embree to the latest official release.

Since Embree v3.13.0 supports AARCH64, switch back to the
official repo instead of using Embree-aarch64.

`thirdparty/embree/patches/godot-changes.patch` should now contain
an accurate diff of the changes done to the library.

1 files changed, 85 insertions, 0 deletions

diff --git a/thirdparty/embree/common/sys/condition.cpp b/thirdparty/embree/common/sys/condition.cpp
new file mode 100644
index 0000000000..606a1d0b04
--- /dev/null
+++ b/thirdparty/embree/common/sys/condition.cpp
@@ -0,0 +1,85 @@
+// Copyright 2009-2021 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+
+#include "condition.h"
+
+#if defined(__WIN32__) && !defined(PTHREADS_WIN32)
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+namespace embree
+{
+  struct ConditionImplementation
+  {
+    __forceinline ConditionImplementation () {
+      InitializeConditionVariable(&cond);
+    }
+
+    __forceinline ~ConditionImplementation () {
+    }
+
+    __forceinline void wait(MutexSys& mutex_in) {
+      SleepConditionVariableCS(&cond, (LPCRITICAL_SECTION)mutex_in.mutex, INFINITE);
+    }
+
+    __forceinline void notify_all() {
+      WakeAllConditionVariable(&cond);
+    }
+
+  public:
+    CONDITION_VARIABLE cond;
+  };
+}
+#endif
+
+#if defined(__UNIX__) || defined(PTHREADS_WIN32)
+#include <pthread.h>
+namespace embree
+{
+  struct ConditionImplementation
+  {
+    __forceinline ConditionImplementation () { 
+      if (pthread_cond_init(&cond,nullptr) != 0)
+        THROW_RUNTIME_ERROR("pthread_cond_init failed");
+    }
+    
+    __forceinline ~ConditionImplementation() { 
+      MAYBE_UNUSED bool ok = pthread_cond_destroy(&cond) == 0;
+      assert(ok);
+    }
+    
+    __forceinline void wait(MutexSys& mutex) { 
+      if (pthread_cond_wait(&cond, (pthread_mutex_t*)mutex.mutex) != 0)
+        THROW_RUNTIME_ERROR("pthread_cond_wait failed");
+    }
+    
+    __forceinline void notify_all() { 
+      if (pthread_cond_broadcast(&cond) != 0)
+        THROW_RUNTIME_ERROR("pthread_cond_broadcast failed");
+    }
+    
+  public:
+    pthread_cond_t cond;
+  };
+}
+#endif
+
+namespace embree 
+{
+  ConditionSys::ConditionSys () { 
+    cond = new ConditionImplementation; 
+  }
+
+  ConditionSys::~ConditionSys() { 
+    delete (ConditionImplementation*) cond;
+  }
+
+  void ConditionSys::wait(MutexSys& mutex) { 
+    ((ConditionImplementation*) cond)->wait(mutex);
+  }
+
+  void ConditionSys::notify_all() { 
+    ((ConditionImplementation*) cond)->notify_all();
+  }
+}