Merge commit 'upstream/2.20'

[msp430-binutils.git] / gold / dirsearch.h

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+// dirsearch.h -- directory searching for gold  -*- C++ -*-
+
+// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#ifndef GOLD_DIRSEARCH_H
+#define GOLD_DIRSEARCH_H
+
+#include <string>
+#include <list>
+
+#include "options.h"
+#include "token.h"
+
+namespace gold
+{
+
+class General_options;
+class Workqueue;
+
+// A simple interface to manage directories to be searched for
+// libraries.
+
+class Dirsearch
+{
+ public:
+  Dirsearch()
+    : directories_(NULL), token_(true)
+  { }
+
+  // Set the list of directories to search.
+  void
+  initialize(Workqueue*, const General_options::Dir_list*);
+
+  // Search for a file, giving one or two names to search for (the
+  // second one may be empty).  Return a full path name for the file,
+  // or the empty string if it could not be found.  This may only be
+  // called if the token is not blocked.  Set *IS_IN_SYSROOT if the
+  // file was found in a directory which is in the sysroot.  *PINDEX
+  // should be set to zero the first time this is called; it will be
+  // updated with the index of the directory where the file is found,
+  // and that value plus one may be used to find the next file with
+  // the same name(s).
+  std::string
+  find(const std::string&, const std::string& n2, bool *is_in_sysroot,
+       int* pindex) const;
+
+  // Return the blocker token which controls access.
+  Task_token*
+  token()
+  { return &this->token_; }
+
+ private:
+  // We can not copy this class.
+  Dirsearch(const Dirsearch&);
+  Dirsearch& operator=(const Dirsearch&);
+
+  // Directories to search.
+  const General_options::Dir_list* directories_;
+  // Blocker token to control access from tasks.
+  Task_token token_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_DIRSEARCH_H)