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

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• Hash : 229fc83d
  Author :
  Date : 2019-01-21T18:09:15
  

  Vulkan: Port renderer to Fuchsia (reland)
  
  Add DisplayVk and WindowSurfaceVk subclasses for Fuchsia to the vulkan
  renderer, as well as an implementation of OSWindow that renders
  fullscreen for the test suite.
  
  Disallow use of the vulkan loader from third_party as Fuchsia uses a fork
  of the loader and has not sent those changes upstream yet.
  
  Add a small wayland-inspired library libfuchsia-egl to provide a type
  "struct fuchsia_egl_window" to use as EGLNativeWindowType. This type
  combines a zx_handle_t to an image pipe channel and a surface size.
  
  Image pipes can only be used once to create a VkSurfaceKHR. This means we
  have to recreate the pipe in tests that call eglCreateWindowSurface more
  than once with a single OSWindow, or the second call will fail. Add a
  resetNativeWindow() method to accomplish this.
  
  Reland disabling -Wextra-semi.
  
  BUG=angleproject:2475
  TEST=angle_end2end_tests on Fuchsia
  
  Change-Id: Ie91715bcd760c6c04d4b8a02a91daa71e32ee30c
  Reviewed-on: https://chromium-review.googlesource.com/c/1467603
  Commit-Queue: Michael Spang <spang@chromium.org>
  Reviewed-by: 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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