tools/profiler/LulCommon.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3
   4 // Copyright (c) 2011, 2013 Google Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions are
   9 // met:
  10 //
  11 //     * Redistributions of source code must retain the above copyright
  12 // notice, this list of conditions and the following disclaimer.
  13 //     * Redistributions in binary form must reproduce the above
  14 // copyright notice, this list of conditions and the following disclaimer
  15 // in the documentation and/or other materials provided with the
  16 // distribution.
  17 //     * Neither the name of Google Inc. nor the names of its
  18 // contributors may be used to endorse or promote products derived from
  19 // this software without specific prior written permission.
  20 //
  21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32
  33 // Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
  34
  35
  36 // This file is derived from the following files in
  37 // toolkit/crashreporter/google-breakpad:
  38 //   src/common/module.cc
  39 //   src/common/unique_string.cc
  40
  41 // There's no internal-only interface for LulCommon.  Hence include
  42 // the external interface directly.
  43 #include "LulCommonExt.h"
  44
  45 #include <stdlib.h>
  46 #include <string.h>
  47
  48 #include <string>
  49 #include <map>
  50
  51
  52 namespace lul {
  53
  54 using std::string;
  55
  56 ////////////////////////////////////////////////////////////////
  57 // Module
  58 //
  59 Module::Module(const string &name, const string &os,
  60                const string &architecture, const string &id) :
  61     name_(name),
  62     os_(os),
  63     architecture_(architecture),
  64     id_(id) { }
  65
  66 Module::~Module() {
  67 }
  68
  69
  70 ////////////////////////////////////////////////////////////////
  71 // UniqueString
  72 //
  73 class UniqueString {
  74  public:
  75   explicit UniqueString(string str) { str_ = strdup(str.c_str()); }
  76   ~UniqueString() { free(reinterpret_cast<void*>(const_cast<char*>(str_))); }
  77   const char* str_;
  78 };
  79
  80 class UniqueStringUniverse {
  81 public:
  82   UniqueStringUniverse() {};
  83   const UniqueString* FindOrCopy(string str) {
  84     std::map<string, UniqueString*>::iterator it = map_.find(str);
  85     if (it == map_.end()) {
  86       UniqueString* ustr = new UniqueString(str);
  87       map_[str] = ustr;
  88       return ustr;
  89     } else {
  90       return it->second;
  91     }
  92   }
  93 private:
  94   std::map<string, UniqueString*> map_;
  95 };
  96
  97
  98 const UniqueString* ToUniqueString(string str) {
  99   // For the initialisation of sUniverse to be threadsafe,
 100   // this relies on C++11's semantics.
 101   static UniqueStringUniverse sUniverse;
 102   return sUniverse.FindOrCopy(str);
 103 }
 104
 105 const char* const FromUniqueString(const UniqueString* ustr)
 106 {
 107   return ustr->str_;
 108 }
 109
 110 }  // namespace lul