3e0df5d2d7
I can measure a few percent speedup by doing that in the file from #146949. Pull Request: https://projects.blender.org/blender/blender/pulls/147608
32 lines
716 B
C++
32 lines
716 B
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
/** \file
|
|
* \ingroup bli
|
|
*/
|
|
|
|
#include "BLI_cache_mutex.hh"
|
|
#include "BLI_task.hh"
|
|
|
|
namespace blender {
|
|
|
|
void CacheMutex::ensure_impl(const FunctionRef<void()> compute_cache)
|
|
{
|
|
if (cache_valid_.load(std::memory_order_acquire)) {
|
|
return;
|
|
}
|
|
std::scoped_lock lock{mutex_};
|
|
/* Double checked lock. */
|
|
if (cache_valid_.load(std::memory_order_relaxed)) {
|
|
return;
|
|
}
|
|
/* Use task isolation because a mutex is locked and the cache computation might use
|
|
* multi-threading. */
|
|
threading::isolate_task(compute_cache);
|
|
|
|
cache_valid_.store(true, std::memory_order_release);
|
|
}
|
|
|
|
} // namespace blender
|