kc3-lang/angle/src/common/tls.h

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• Hash : fbf8d1ea
  Author :
  Date : 2021-10-07T13:53:05
  

  Remove windows.h from common/platform.h
  
  Windows.h is expensive and causes lots of namespace pollution with the
  macros that it defines. This change removes windows.h from platform.h
  and debug.h and adds the necessary typedes and new include of windows.h
  to let Chromium build.
  
  This reduces the number of Angle translation units that include
  windows.h by about a third, from 624 to 440. Significant further
  reductions will be difficult because of translation units that genuinely
  need windows.h.
  
  Earlier versions of this change made it clear that the DeleteFile and
  GetCurrentTime macros were renaming Angle functions. These angle
  functions were renamed which makes this change much simpler.
  
  Bug: angleproject:6283
  Change-Id: Icddc8f98b19485e563b2cf616bba2ad4ea49228e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3212639
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/common/tls.h

• //
  // Copyright 2014 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.
  //
  
  // tls.h: Simple cross-platform interface for thread local storage.
  
  #ifndef COMMON_TLS_H_
  #define COMMON_TLS_H_
  
  #include "common/angleutils.h"
  #include "common/platform.h"
  
  #ifdef ANGLE_PLATFORM_WINDOWS
  #    include <windows.h>
  #endif
  
  namespace gl
  {
  class Context;
  }
  
  #ifdef ANGLE_PLATFORM_WINDOWS
  
  // TLS does not exist for Windows Store and needs to be emulated
  #    ifdef ANGLE_ENABLE_WINDOWS_UWP
  #        ifndef TLS_OUT_OF_INDEXES
  #            define TLS_OUT_OF_INDEXES static_cast<DWORD>(0xFFFFFFFF)
  #        endif
  #        ifndef CREATE_SUSPENDED
  #            define CREATE_SUSPENDED 0x00000004
  #        endif
  #    endif
  typedef DWORD TLSIndex;
  #    define TLS_INVALID_INDEX (TLS_OUT_OF_INDEXES)
  #elif defined(ANGLE_PLATFORM_POSIX)
  #    include <errno.h>
  #    include <pthread.h>
  #    include <semaphore.h>
  typedef pthread_key_t TLSIndex;
  #    define TLS_INVALID_INDEX (static_cast<TLSIndex>(-1))
  #else
  #    error Unsupported platform.
  #endif
  
  // TODO(kbr): for POSIX platforms this will have to be changed to take
  // in a destructor function pointer, to allow the thread-local storage
  // to be properly deallocated upon thread exit.
  TLSIndex CreateTLSIndex();
  bool DestroyTLSIndex(TLSIndex index);
  
  bool SetTLSValue(TLSIndex index, void *value);
  void *GetTLSValue(TLSIndex index);
  
  #endif  // COMMON_TLS_H_
  

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