Initial source checkin.

The source files were determined by building net_unittests in chromium's source
tree. Some of the obvious libraries were left out (v8, gmock, gtest).

The Android.mk file has all the sources (minus unittests and tools) that were
used during net_unittests compilation. Nothing builds yet because of STL but
that is the next task. The .cpp files will most likely not compile anyways
because of the LOCAL_CPP_EXTENSION mod. I will have to break this into multiple
projects to get around that limitation.

1 files changed, 122 insertions, 0 deletions

diff --git a/base/message_pump.h b/base/message_pump.h
new file mode 100644
index 0000000..9ae9e2c
--- /dev/null
+++ b/base/message_pump.h
@@ -0,0 +1,122 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_H_
+#define BASE_MESSAGE_PUMP_H_
+
+#include "base/ref_counted.h"
+
+namespace base {
+
+class Time;
+
+class MessagePump : public RefCountedThreadSafe<MessagePump> {
+ public:
+  // Please see the comments above the Run method for an illustration of how
+  // these delegate methods are used.
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    // Called from within Run in response to ScheduleWork or when the message
+    // pump would otherwise call DoDelayedWork.  Returns true to indicate that
+    // work was done.  DoDelayedWork will not be called if DoWork returns true.
+    virtual bool DoWork() = 0;
+
+    // Called from within Run in response to ScheduleDelayedWork or when the
+    // message pump would otherwise sleep waiting for more work.  Returns true
+    // to indicate that delayed work was done.  DoIdleWork will not be called
+    // if DoDelayedWork returns true.  Upon return |next_delayed_work_time|
+    // indicates the time when DoDelayedWork should be called again.  If
+    // |next_delayed_work_time| is null (per Time::is_null), then the queue of
+    // future delayed work (timer events) is currently empty, and no additional
+    // calls to this function need to be scheduled.
+    virtual bool DoDelayedWork(Time* next_delayed_work_time) = 0;
+
+    // Called from within Run just before the message pump goes to sleep.
+    // Returns true to indicate that idle work was done.
+    virtual bool DoIdleWork() = 0;
+  };
+
+  virtual ~MessagePump() {}
+
+  // The Run method is called to enter the message pump's run loop.
+  //
+  // Within the method, the message pump is responsible for processing native
+  // messages as well as for giving cycles to the delegate periodically.  The
+  // message pump should take care to mix delegate callbacks with native
+  // message processing so neither type of event starves the other of cycles.
+  //
+  // The anatomy of a typical run loop:
+  //
+  //   for (;;) {
+  //     bool did_work = DoInternalWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     did_work |= delegate_->DoWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     did_work |= delegate_->DoDelayedWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     if (did_work)
+  //       continue;
+  //
+  //     did_work = delegate_->DoIdleWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     if (did_work)
+  //       continue;
+  //
+  //     WaitForWork();
+  //   }
+  //
+  // Here, DoInternalWork is some private method of the message pump that is
+  // responsible for dispatching the next UI message or notifying the next IO
+  // completion (for example).  WaitForWork is a private method that simply
+  // blocks until there is more work of any type to do.
+  //
+  // Notice that the run loop cycles between calling DoInternalWork, DoWork,
+  // and DoDelayedWork methods.  This helps ensure that neither work queue
+  // starves the other.  This is important for message pumps that are used to
+  // drive animations, for example.
+  //
+  // Notice also that after each callout to foreign code, the run loop checks
+  // to see if it should quit.  The Quit method is responsible for setting this
+  // flag.  No further work is done once the quit flag is set.
+  //
+  // NOTE: Care must be taken to handle Run being called again from within any
+  // of the callouts to foreign code.  Native message pumps may also need to
+  // deal with other native message pumps being run outside their control
+  // (e.g., the MessageBox API on Windows pumps UI messages!).  To be specific,
+  // the callouts (DoWork and DoDelayedWork) MUST still be provided even in
+  // nested sub-loops that are "seemingly" outside the control of this message
+  // pump.  DoWork in particular must never be starved for time slices unless
+  // it returns false (meaning it has run out of things to do).
+  //
+  virtual void Run(Delegate* delegate) = 0;
+
+  // Quit immediately from the most recently entered run loop.  This method may
+  // only be used on the thread that called Run.
+  virtual void Quit() = 0;
+
+  // Schedule a DoWork callback to happen reasonably soon.  Does nothing if a
+  // DoWork callback is already scheduled.  This method may be called from any
+  // thread.  Once this call is made, DoWork should not be "starved" at least
+  // until it returns a value of false.
+  virtual void ScheduleWork() = 0;
+
+  // Schedule a DoDelayedWork callback to happen at the specified time,
+  // cancelling any pending DoDelayedWork callback.  This method may only be
+  // used on the thread that called Run.
+  virtual void ScheduleDelayedWork(const Time& delayed_work_time) = 0;
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_H_