[mojo-edk] Add MojoWatch and MojoCancelWatch APIs

mojo/edk/system/core.h

 // Copyright 2013 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 MOJO_EDK_SYSTEM_CORE_H_
 #define MOJO_EDK_SYSTEM_CORE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 114 matching lines @@
   MojoResult Wait(MojoHandle handle,
                   MojoHandleSignals signals,
                   MojoDeadline deadline,
                   MojoHandleSignalsState* signals_state);
   MojoResult WaitMany(const MojoHandle* handles,
                       const MojoHandleSignals* signals,
                       uint32_t num_handles,
                       MojoDeadline deadline,
                       uint32_t* result_index,
                       MojoHandleSignalsState* signals_states);
+  MojoResult Watch(MojoHandle handle,
+                   MojoHandleSignals signals,
+                   MojoWatchCallback callback,
+                   uintptr_t context);
+  MojoResult CancelWatch(MojoHandle handle, uintptr_t context);
 
   // These methods correspond to the API functions defined in
   // "mojo/public/c/system/wait_set.h":
   MojoResult CreateWaitSet(MojoHandle* wait_set_handle);
   MojoResult AddHandle(MojoHandle wait_set_handle,
                        MojoHandle handle,
                        MojoHandleSignals signals);
   MojoResult RemoveHandle(MojoHandle wait_set_handle,
                           MojoHandle handle);
   MojoResult GetReadyHandles(MojoHandle wait_set_handle,
@@ skipping 100 matching lines @@
   base::Lock mapping_table_lock_;  // Protects |mapping_table_|.
   MappingTable mapping_table_;
 
   DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_H_