src/starboard/shared/posix/system_get_number_of_processors.cc

// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 "starboard/system.h"

#include <unistd.h>

#include "starboard/log.h"

int SbSystemGetNumberOfProcessors() {
  // It seems that sysconf returns the number of "logical" processors on both
  // Mac and Linux.  So we get the number of "online logical" processors.
  long res = sysconf(_SC_NPROCESSORS_ONLN);  // NOLINT[runtime/int]
  if (res == -1) {
    SB_NOTREACHED();
    return 1;
  }

  return static_cast<int>(res);
}