kc3-lang/angle/src/compiler/InitializeParseContext.cpp

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• Author : alokp@chromium.org
  Date : 2012-06-15 16:25:11
  Hash : 8b851c6d
  Message : Preparation of hooking up the new preprocessor. - Added custom Diagnostics class. Routed all info-log messages via this new class. - Added custom DirectiveHandler class. Moved directive-handling code to this class and routed the old path. - Deleted lexer_glue because it is not needed anymore. The new preprocessor is almost ready! - Killed a bunch of dead code related to PragmaTable. Review URL: https://codereview.appspot.com/6308074 git-svn-id: https://angleproject.googlecode.com/svn/trunk@1150 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/InitializeParseContext.cpp

• //
  // Copyright (c) 2012 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.
  //
  
  #include "compiler/InitializeParseContext.h"
  
  #include "compiler/osinclude.h"
  
  OS_TLSIndex GlobalParseContextIndex = OS_INVALID_TLS_INDEX;
  
  bool InitializeParseContextIndex()
  {
      if (GlobalParseContextIndex != OS_INVALID_TLS_INDEX) {
          assert(0 && "InitializeParseContextIndex(): Parse Context already initalized");
          return false;
      }
  
      //
      // Allocate a TLS index.
      //
      GlobalParseContextIndex = OS_AllocTLSIndex();
      
      if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
          assert(0 && "InitializeParseContextIndex(): Parse Context already initalized");
          return false;
      }
  
      return true;
  }
  
  bool FreeParseContextIndex()
  {
      OS_TLSIndex tlsiIndex = GlobalParseContextIndex;
  
      if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
          assert(0 && "FreeParseContextIndex(): Parse Context index not initalized");
          return false;
      }
  
      GlobalParseContextIndex = OS_INVALID_TLS_INDEX;
  
      return OS_FreeTLSIndex(tlsiIndex);
  }
  
  bool InitializeGlobalParseContext()
  {
      if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
          assert(0 && "InitializeGlobalParseContext(): Parse Context index not initalized");
          return false;
      }
  
      TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
      if (lpParseContext != 0) {
          assert(0 && "InitializeParseContextIndex(): Parse Context already initalized");
          return false;
      }
  
      TThreadParseContext *lpThreadData = new TThreadParseContext();
      if (lpThreadData == 0) {
          assert(0 && "InitializeGlobalParseContext(): Unable to create thread parse context");
          return false;
      }
  
      lpThreadData->lpGlobalParseContext = 0;
      OS_SetTLSValue(GlobalParseContextIndex, lpThreadData);
  
      return true;
  }
  
  bool FreeParseContext()
  {
      if (GlobalParseContextIndex == OS_INVALID_TLS_INDEX) {
          assert(0 && "FreeParseContext(): Parse Context index not initalized");
          return false;
      }
  
      TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
      if (lpParseContext)
          delete lpParseContext;
  
      return true;
  }
  
  TParseContextPointer& GetGlobalParseContext()
  {
      //
      // Minimal error checking for speed
      //
  
      TThreadParseContext *lpParseContext = static_cast<TThreadParseContext *>(OS_GetTLSValue(GlobalParseContextIndex));
  
      return lpParseContext->lpGlobalParseContext;
  }