kc3-lang/angle/util/posix/Posix_system_utils.cpp

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• Hash : f35f1110
  Author :
  Date : 2019-07-19T09:18:55
  

  Add script to apply clang-format on all sources
  
  1. python script wrapper to call clang-format over the whole code base
  2. Add clang-format rule `IncludeBlocks: Preserve` to tell clang-format
  do not merge include blocks
  3. Fix existed clang-format issue in code base
  
  Bug: angleproject:3532
  Change-Id: I289292dc62c2784ff21688065c87c3f3f5538f17
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1709720
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• util/posix/Posix_system_utils.cpp

• //
  // Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // Posix_system_utils.cpp: Implementation of OS-specific functions for Posix systems
  
  #include "util/system_utils.h"
  
  #include <sched.h>
  #include <time.h>
  #include <unistd.h>
  
  #if !defined(ANGLE_PLATFORM_FUCHSIA)
  #    include <dlfcn.h>
  #    include <sys/resource.h>
  #endif
  
  #include "common/platform.h"
  
  namespace angle
  {
  
  void Sleep(unsigned int milliseconds)
  {
      // On Windows Sleep(0) yields while it isn't guaranteed by Posix's sleep
      // so we replicate Windows' behavior with an explicit yield.
      if (milliseconds == 0)
      {
          sched_yield();
      }
      else
      {
          timespec sleepTime = {
              .tv_sec  = milliseconds / 1000,
              .tv_nsec = (milliseconds % 1000) * 1000000,
          };
  
          nanosleep(&sleepTime, nullptr);
      }
  }
  
  void SetLowPriorityProcess()
  {
  #if !defined(ANGLE_PLATFORM_FUCHSIA)
      setpriority(PRIO_PROCESS, getpid(), 10);
  #endif
  }
  
  void WriteDebugMessage(const char *format, ...)
  {
      va_list vararg;
      va_start(vararg, format);
      vfprintf(stderr, format, vararg);
      va_end(vararg);
  }
  
  bool StabilizeCPUForBenchmarking()
  {
  #if !defined(ANGLE_PLATFORM_FUCHSIA)
      bool success = true;
      errno        = 0;
      setpriority(PRIO_PROCESS, getpid(), -20);
      if (errno)
      {
          // A friendly warning in case the test was run without appropriate permission.
          perror(
              "Warning: setpriority failed in StabilizeCPUForBenchmarking. Process will retain "
              "default priority");
          success = false;
      }
  #    if ANGLE_PLATFORM_LINUX
      cpu_set_t affinity;
      CPU_SET(0, &affinity);
      errno = 0;
      if (sched_setaffinity(getpid(), sizeof(affinity), &affinity))
      {
          perror(
              "Warning: sched_setaffinity failed in StabilizeCPUForBenchmarking. Process will retain "
              "default affinity");
          success = false;
      }
  #    else
      // TODO(jmadill): Implement for non-linux. http://anglebug.com/2923
  #    endif
  
      return success;
  #else  // defined(ANGLE_PLATFORM_FUCHSIA)
      return false;
  #endif
  }
  }  // namespace angle
  

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