diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/synchronization/barrier.cc')
-rw-r--r-- | third_party/abseil_cpp/absl/synchronization/barrier.cc | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/third_party/abseil_cpp/absl/synchronization/barrier.cc b/third_party/abseil_cpp/absl/synchronization/barrier.cc deleted file mode 100644 index 0dfd795e7b5f..000000000000 --- a/third_party/abseil_cpp/absl/synchronization/barrier.cc +++ /dev/null @@ -1,52 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/synchronization/barrier.h" - -#include "absl/base/internal/raw_logging.h" -#include "absl/synchronization/mutex.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// Return whether int *arg is zero. -static bool IsZero(void *arg) { - return 0 == *reinterpret_cast<int *>(arg); -} - -bool Barrier::Block() { - MutexLock l(&this->lock_); - - this->num_to_block_--; - if (this->num_to_block_ < 0) { - ABSL_RAW_LOG( - FATAL, - "Block() called too many times. num_to_block_=%d out of total=%d", - this->num_to_block_, this->num_to_exit_); - } - - this->lock_.Await(Condition(IsZero, &this->num_to_block_)); - - // Determine which thread can safely delete this Barrier object - this->num_to_exit_--; - ABSL_RAW_CHECK(this->num_to_exit_ >= 0, "barrier underflow"); - - // If num_to_exit_ == 0 then all other threads in the barrier have - // exited the Wait() and have released the Mutex so this thread is - // free to delete the barrier. - return this->num_to_exit_ == 0; -} - -ABSL_NAMESPACE_END -} // namespace absl |