From: bruceperens <bruceperens@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Fri, 17 Jan 2014 19:29:37 +0000 (+0000)
Subject: Add framework for POSIX event handler.
X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=69d4e500f2dc1f8a7fff8af63a8730ae85854cba;p=freetel-svn-tracking.git

Add framework for POSIX event handler.


git-svn-id: https://svn.code.sf.net/p/freetel/code@1368 01035d8c-6547-0410-b346-abe4f91aad63
---

diff --git a/freedv-server/CMakeLists.txt b/freedv-server/CMakeLists.txt
index 5734a7ab..7a4f492c 100644
--- a/freedv-server/CMakeLists.txt
+++ b/freedv-server/CMakeLists.txt
@@ -95,19 +95,21 @@ set(Compile.sources
   source/codec.cpp
   source/codec_noop.cpp
   source/driver_manager.cpp
+  source/event_handler.cpp
+  source/event_posix.cpp
   source/interfaces.cpp
   source/keying.cpp
   source/keying_sink.cpp
   source/modem.cpp
   source/modem_noop.cpp
-  source/ptt_input.cpp
   source/ptt_constant.cpp
+  source/ptt_input.cpp
   source/run.cpp
   source/text_constant.cpp
   source/text_input.cpp
   source/tone.cpp
-  source/utility.cpp
   source/user_interface.cpp
+  source/utility.cpp
 )
 
 set(Optional.sources
diff --git a/freedv-server/source/drivers.h b/freedv-server/source/drivers.h
index 22e5c981..e269feb5 100644
--- a/freedv-server/source/drivers.h
+++ b/freedv-server/source/drivers.h
@@ -430,6 +430,7 @@ namespace FreeDV {
     AudioInput *	Tone(const char * parameter);
     AudioOutput *	AudioSink(const char * parameter);
     Codec *		CodecNoOp(const char * parameter);
+    EventHandler *	EventHandlerPOSIX(const char * parameter);
     Keying *		KeyingSink(const char * parameter);
     Modem *		ModemNoOp(const char * parameter);
     PTTInput *		PTTConstant(const char * parameter);
diff --git a/freedv-server/source/event_handler.cpp b/freedv-server/source/event_handler.cpp
new file mode 100644
index 00000000..b80799e9
--- /dev/null
+++ b/freedv-server/source/event_handler.cpp
@@ -0,0 +1,11 @@
+/// The virtual base class for event handlers.
+
+#include "drivers.h"
+
+namespace FreeDV {
+
+  EventHandler::~EventHandler()
+  {
+  }
+
+}
diff --git a/freedv-server/source/event_posix.cpp b/freedv-server/source/event_posix.cpp
new file mode 100644
index 00000000..bb1c964f
--- /dev/null
+++ b/freedv-server/source/event_posix.cpp
@@ -0,0 +1,81 @@
+/// The POSIX event handler, mainly for running without a GUI. 
+
+#include "drivers.h"
+
+namespace FreeDV {
+  /// Event handler class for POSIX.
+  class EventHandlerPOSIX : public EventHandler {
+  protected:
+	/// Run one iteration of the event handler.
+	void		iterate();
+
+  public:
+	/// Create an event handler instance.
+			EventHandlerPOSIX(const char * parameters);
+
+	virtual		~EventHandlerPOSIX();
+
+	/// Monitor a file descriptor in the event loop. Call a function if the
+	/// file descriptor is ready for I/O.
+	/// \param fd The file descriptor to monitor.
+	/// \param type A bit-field of values defined in this class,
+	///  indicating the kinds of events to listen for.
+	/// \param private_data Private data to be passed to the event
+	///  function.
+	/// \param event A coroutine to call when there is a status change
+	///  on the file descriptor. The arguments of the coroutine are
+	///  - fd: The file descriptor that has an event.
+	///  - type: A bit-field of FDStatus values indicating the events
+	///    received.
+	///  - private: The address of opaque data to be passed to the driver.
+	virtual void	monitor(int fd, unsigned int type, void * private_data,
+			 void (*event)(int fd, unsigned int type, void * private_data)
+			 );
+
+	/// Remove all monitoring of the given file descriptor by the event
+	/// loop handler.
+	/// \param fd The file descriptor to be removed from monitoring.
+	virtual void	unmonitor(int fd);
+  };
+
+  EventHandlerPOSIX::EventHandlerPOSIX(const char * parameters)
+  : EventHandler("posix", parameters)
+  {
+  }
+
+  EventHandlerPOSIX::~EventHandlerPOSIX()
+  {
+  }
+
+  void
+  EventHandlerPOSIX::iterate()
+  {
+  }
+
+  EventHandler *
+  Driver::EventHandlerPOSIX(const char * parameter)
+  {
+    return new ::FreeDV::EventHandlerPOSIX(parameter);
+  }
+
+  void
+  EventHandlerPOSIX::monitor(int fd, unsigned int type, void * private_data,
+   void (*event)(int fd, unsigned int type, void * private_data))
+  {
+  }
+
+  void
+  EventHandlerPOSIX::unmonitor(int fd)
+  {
+  }
+
+#ifndef NO_INITIALIZERS
+  static bool
+  initializer()
+  {
+    init_driver_manager().register_codec("no-op", Driver::CodecNoOp);
+    return true;
+  }
+  static const bool initialized = initializer();
+#endif
+}