PollFD: autodeduce type of fd field

* glib/glibmm/main.[h|cc]: file descriptor to poll can be either of gint,
  or gint64 type, depending on the platform. glibmm should follow this
  rule as well.

https://bugzilla.gnome.org/show_bug.cgi?id=772074

2 files changed, 14 insertions, 12 deletions

diff --git a/glib/glibmm/main.cc b/glib/glibmm/main.cc
index f2436054..1f19f46e 100644
--- a/glib/glibmm/main.cc
+++ b/glib/glibmm/main.cc
@@ -324,14 +324,14 @@ PollFD::PollFD()
   gobject_.revents = 0;
 }
 
-PollFD::PollFD(int fd)
+PollFD::PollFD(PollFD::fd_t fd)
 {
   gobject_.fd = fd;
   gobject_.events = 0;
   gobject_.revents = 0;
 }
 
-PollFD::PollFD(int fd, IOCondition events)
+PollFD::PollFD(PollFD::fd_t fd, IOCondition events)
 {
   gobject_.fd = fd;
   gobject_.events = events;
@@ -460,7 +460,7 @@ inline SignalIO::SignalIO(GMainContext* context) : context_(context)
 
 sigc::connection
 SignalIO::connect(
-  const sigc::slot<bool(IOCondition)>& slot, int fd, IOCondition condition, int priority)
+  const sigc::slot<bool(IOCondition)>& slot, PollFD::fd_t fd, IOCondition condition, int priority)
 {
   const auto source = IOSource::create(fd, condition);
 
@@ -1220,7 +1220,7 @@ IdleSource::dispatch(sigc::slot_base* slot)
 
 // static
 Glib::RefPtr<IOSource>
-IOSource::create(int fd, IOCondition condition)
+IOSource::create(PollFD::fd_t fd, IOCondition condition)
 {
   return Glib::RefPtr<IOSource>(new IOSource(fd, condition));
 }
@@ -1237,7 +1237,7 @@ IOSource::connect(const sigc::slot<bool(IOCondition)>& slot)
   return connect_generic(slot);
 }
 
-IOSource::IOSource(int fd, IOCondition condition) : poll_fd_(fd, condition)
+IOSource::IOSource(PollFD::fd_t fd, IOCondition condition) : poll_fd_(fd, condition)
 {
   add_poll(poll_fd_);
 }
diff --git a/glib/glibmm/main.h b/glib/glibmm/main.h
index ca884d00..63b1ef1b 100644
--- a/glib/glibmm/main.h
+++ b/glib/glibmm/main.h
@@ -39,12 +39,14 @@ namespace Glib
 class PollFD
 {
 public:
+  using fd_t = decltype(GPollFD::fd);
+
   PollFD();
-  explicit PollFD(int fd);
-  PollFD(int fd, IOCondition events);
+  explicit PollFD(fd_t fd);
+  PollFD(fd_t fd, IOCondition events);
 
-  void set_fd(int fd) { gobject_.fd = fd; }
-  int get_fd() const { return gobject_.fd; }
+  void set_fd(fd_t fd) { gobject_.fd = fd; }
+  fd_t get_fd() const { return gobject_.fd; }
 
   void set_events(IOCondition events) { gobject_.events = events; }
   IOCondition get_events() const { return static_cast<IOCondition>(gobject_.events); }
@@ -285,7 +287,7 @@ public:
    * @param priority The priority of the new event source.
    * @return A connection handle, which can be used to disconnect the handler.
    */
-  sigc::connection connect(const sigc::slot<bool(IOCondition)>& slot, int fd, IOCondition condition,
+  sigc::connection connect(const sigc::slot<bool(IOCondition)>& slot, PollFD::fd_t fd, IOCondition condition,
     int priority = PRIORITY_DEFAULT);
 
   /** Connects an I/O handler that watches an I/O channel.
@@ -845,13 +847,13 @@ class IOSource : public Glib::Source
 public:
   using CppObjectType = Glib::IOSource;
 
-  static Glib::RefPtr<IOSource> create(int fd, IOCondition condition);
+  static Glib::RefPtr<IOSource> create(PollFD::fd_t fd, IOCondition condition);
   static Glib::RefPtr<IOSource> create(
     const Glib::RefPtr<IOChannel>& channel, IOCondition condition);
   sigc::connection connect(const sigc::slot<bool(IOCondition)>& slot);
 
 protected:
-  IOSource(int fd, IOCondition condition);
+  IOSource(PollFD::fd_t fd, IOCondition condition);
   IOSource(const Glib::RefPtr<IOChannel>& channel, IOCondition condition);
 
   /** Wrap an existing GSource object and install the given callback function.