[glibmm/c++11v2: 3/4] C++11: examples: Use nullptr.

[Murray Cumming <murrayc src gnome org>]

commit e4677407be25f1fa7814be41e012d1273efa993c
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jun 27 10:25:21 2013 +0200

    C++11: examples: Use nullptr.

 examples/child_watch/main.cc          |    2 +-
 examples/iochannel_stream/fdstream.cc |    8 ++++----
 examples/network/resolver.cc          |    2 +-
 examples/thread/dispatcher.cc         |    4 ++--
 examples/thread/dispatcher2.cc        |   10 +++++-----
 5 files changed, 13 insertions(+), 13 deletions(-)
---
diff --git a/examples/child_watch/main.cc b/examples/child_watch/main.cc
index 3bbc368..883577a 100644
--- a/examples/child_watch/main.cc
+++ b/examples/child_watch/main.cc
@@ -40,7 +40,7 @@ void ChildWatch::run()
 {
   GPid pid = fork();
   
-  if(pid==0)
+  if(!pid)
   {
     sleep(5);
     exit(0);
diff --git a/examples/iochannel_stream/fdstream.cc b/examples/iochannel_stream/fdstream.cc
index be97676..90df473 100644
--- a/examples/iochannel_stream/fdstream.cc
+++ b/examples/iochannel_stream/fdstream.cc
@@ -280,8 +280,8 @@ std::streamsize fdstreambuf::xsgetn(char* dest, std::streamsize num)
 }
 
 fdstream::fdstream(int fd, bool manage)
-: std::istream(0),
-  std::ostream(0),
+: std::istream(nullptr),
+  std::ostream(nullptr),
   buf(fd, manage)
 {
   std::istream::rdbuf(&buf);
@@ -289,8 +289,8 @@ fdstream::fdstream(int fd, bool manage)
 }
 
 fdstream::fdstream()
-: std::istream(0),
-  std::ostream(0)
+: std::istream(nullptr),
+  std::ostream(nullptr)
 {
   std::istream::rdbuf(&buf);
   std::ostream::rdbuf(&buf);
diff --git a/examples/network/resolver.cc b/examples/network/resolver.cc
index 4fdf0cf..dee1ebf 100644
--- a/examples/network/resolver.cc
+++ b/examples/network/resolver.cc
@@ -405,7 +405,7 @@ do_connectable (const std::string& arg, gboolean synchronous)
         {
             host = arg.substr (0, pos);
             port_str = arg.substr(pos);
-            port = strtoul (port_str.c_str (), NULL, 10);
+            port = strtoul (port_str.c_str (), nullptr, 10);
         }
         else
             port = 0;
diff --git a/examples/thread/dispatcher.cc b/examples/thread/dispatcher.cc
index 21833e7..1c1eb66 100644
--- a/examples/thread/dispatcher.cc
+++ b/examples/thread/dispatcher.cc
@@ -80,7 +80,7 @@ public:
 
 ThreadProgress::ThreadProgress(int id)
 :
-  thread_   (0),
+  thread_   (nullptr),
   id_       (id),
   progress_ (0)
 {
@@ -91,7 +91,7 @@ ThreadProgress::ThreadProgress(int id)
 ThreadProgress::~ThreadProgress()
 {
   // It is an error if the thread is still running at this point.
-  g_return_if_fail(thread_ == 0);
+  g_return_if_fail(thread_ == nullptr);
 }
 
 int ThreadProgress::id() const
diff --git a/examples/thread/dispatcher2.cc b/examples/thread/dispatcher2.cc
index dd7d7de..b9afebc 100644
--- a/examples/thread/dispatcher2.cc
+++ b/examples/thread/dispatcher2.cc
@@ -77,7 +77,7 @@ ThreadTimer::ThreadTimer()
   // Create a new Glib::Dispatcher that is attached to the default main context,
   signal_increment_ (),
   // This pointer will be initialized later by the 2nd thread.
-  signal_finished_ptr_ (NULL)
+  signal_finished_ptr_ (nullptr)
 {
   // Connect the cross-thread signal.
   signal_increment_.connect(sigc::mem_fun(*this, &ThreadTimer::timer_increment));
@@ -99,7 +99,7 @@ void ThreadTimer::launch()
       sigc::mem_fun(*this, &ThreadTimer::thread_function));
 
   // Wait for the 2nd thread's startup notification.
-  while(signal_finished_ptr_ == NULL)
+  while(!signal_finished_ptr_)
     startup_cond_.wait(startup_mutex_);
 }
 
@@ -109,10 +109,10 @@ void ThreadTimer::signal_finished_emit()
   signal_finished_ptr_->emit();
 
   // wait for the thread to join
-  if(thread_ != NULL)
+  if(thread_)
     thread_->join();
 
-  signal_finished_ptr_ = NULL;
+  signal_finished_ptr_ = nullptr;
 }
 
 void ThreadTimer::print() const
@@ -189,7 +189,7 @@ ThreadTimer::type_signal_end ThreadTimer::signal_end_;
 
 ThreadDispatcher::ThreadDispatcher()
 : 
-  timer_ (NULL)
+  timer_ (nullptr)
 {
   std::cout << "Thread Dispatcher Example #2" << std::endl;