[mojo-edk] Add MojoWatch and MojoCancelWatch APIs

mojo/edk/embedder/entrypoints.cc

 // Copyright 2014 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.
 
 #include <stdint.h>
 
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/public/c/system/buffer.h"
 #include "mojo/public/c/system/data_pipe.h"
@@ skipping 24 matching lines @@
 MojoResult MojoWaitMany(const MojoHandle* handles,
                         const MojoHandleSignals* signals,
                         uint32_t num_handles,
                         MojoDeadline deadline,
                         uint32_t* result_index,
                         MojoHandleSignalsState* signals_states) {
   return g_core->WaitMany(handles, signals, num_handles, deadline, result_index,
                           signals_states);
 }
 
+MojoResult MojoWatch(MojoHandle handle,
+                     MojoHandleSignals signals,
+                     MojoWatchCallback callback,
+                     uintptr_t context) {
+  return g_core->Watch(handle, signals, callback, context);
+}
+
+MojoResult MojoCancelWatch(MojoHandle handle, uintptr_t context) {
+  return g_core->CancelWatch(handle, context);
+}
+
 MojoResult MojoCreateWaitSet(MojoHandle* wait_set_handle) {
   return g_core->CreateWaitSet(wait_set_handle);
 }
 
 MojoResult MojoAddHandle(MojoHandle wait_set_handle,
                          MojoHandle handle,
                          MojoHandleSignals signals) {
   return g_core->AddHandle(wait_set_handle, handle, signals);
 }
 
@@ skipping 107 matching lines @@
                          void** buffer,
                          MojoMapBufferFlags flags) {
   return g_core->MapBuffer(buffer_handle, offset, num_bytes, buffer, flags);
 }
 
 MojoResult MojoUnmapBuffer(void* buffer) {
   return g_core->UnmapBuffer(buffer);
 }
 
 }  // extern "C"