lazy_threading.cc

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "BLI_lazy_threading.hh"
#include "BLI_stack.hh"
#include "BLI_vector.hh"
 
namespace blender::lazy_threading {

using HintReceivers = RawStack<RawVector<FunctionRef<void()>, 0>, 0>;
static thread_local HintReceivers hint_receivers = []() {
  HintReceivers receivers;
  /* Make sure there is always at least one vector. */
  receivers.push_as();
  return receivers;
}();
 
void send_hint()
{
  for (const FunctionRef<void()> &fn : hint_receivers.peek()) {
    fn();
  }
}
 
HintReceiver::HintReceiver(const FunctionRef<void()> fn)
{
  hint_receivers.peek().append(fn);
}
 
HintReceiver::~HintReceiver()
{
  hint_receivers.peek().pop_last();
}
 
ReceiverIsolation::ReceiverIsolation()
{
  hint_receivers.push_as();
}
 
ReceiverIsolation::~ReceiverIsolation()
{
  BLI_assert(hint_receivers.peek().is_empty());
  hint_receivers.pop();
}
 
}  // namespace blender::lazy_threading