thread_quota.cc

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// Copyright 2021 gRPC 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
//
//     http://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 <grpc/support/port_platform.h>
 
#include "src/core/lib/resource_quota/thread_quota.h"
 
#include <grpc/support/log.h>
 
namespace grpc_core {
 
ThreadQuota::ThreadQuota() = default;
 
ThreadQuota::~ThreadQuota() = default;
 
void ThreadQuota::SetMax(size_t new_max) {
  MutexLock lock(&mu_);
  max_ = new_max;
}
 
bool ThreadQuota::Reserve(size_t num_threads) {
  MutexLock lock(&mu_);
  if (allocated_ + num_threads > max_) return false;
  allocated_ += num_threads;
  return true;
}
 
void ThreadQuota::Release(size_t num_threads) {
  MutexLock lock(&mu_);
  GPR_ASSERT(num_threads <= allocated_);
  allocated_ -= num_threads;
}
 
}  // namespace grpc_core