Added MojoNewWait and MojoNewWaitMany, along with unit tests.

mojo/public/c/system/types.h

Index: mojo/public/c/system/types.h
diff --git a/mojo/public/c/system/types.h b/mojo/public/c/system/types.h
index 9b1eedca402af3b5f7ddba40535d25e90e5b6f49..c2bc5cf1daaa9332af2727ed7498d7e0e739d65b 100644
--- a/mojo/public/c/system/types.h
+++ b/mojo/public/c/system/types.h
@@ -165,7 +165,15 @@ const MojoHandleSignals MOJO_HANDLE_SIGNAL_PEER_CLOSED = 1 << 2;
 #define MOJO_HANDLE_SIGNAL_PEER_CLOSED ((MojoHandleSignals)1 << 2)
 #endif
 
-// TODO(vtl): Add out parameters with this to MojoWait/MojoWaitMany.
+// |MojoHandleSignalsState|: Returned by wait functions to indicate the
+// signaling state of handles. Members are as follows:
+//   - |satisfied signals| Bitmask of signals that were satisfied at some time

[viettrungluu, 2014/12/02 17:24:56]

nit: colon after "|satisfied_signals|"

[jimbe, 2014/12/02 19:21:19]

Done.

+//         before the call returned. This can include signals that were not
+//         listed in |signals|.

[viettrungluu, 2014/12/02 17:24:56]

Dangling reference to |signals|.

[jimbe, 2014/12/02 19:21:19]

Done.

+//   - |satisfiable signals| These are the signals that are possible to satisfy.

[viettrungluu, 2014/12/02 17:24:56]

same nit as above

[jimbe, 2014/12/02 19:21:19]

Done.

+//         For example, if the return value was
+//         |MOJO_RESULT_FAILED_PRECONDITION|, you can use this field to
+//         determine which, if any, of the signals can still be satisfied.
 // Note: This struct is not extensible (and only has 32-bit quantities), so it's
 // 32-bit-aligned.
 MOJO_STATIC_ASSERT(MOJO_ALIGNOF(int32_t) == 4, "int32_t has weird alignment");