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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MOJO_PUBLIC_SYSTEM_ASYNC_WAITER_H_ | |
6 #define MOJO_PUBLIC_SYSTEM_ASYNC_WAITER_H_ | |
7 | |
8 #include "mojo/public/system/core.h" | |
9 | |
10 #ifdef __cplusplus | |
11 extern "C" { | |
12 #endif | |
13 | |
14 typedef uintptr_t MojoAsyncWaitID; | |
15 | |
16 typedef void (*MojoAsyncWaitCallback)(void* closure, MojoResult result); | |
17 | |
18 struct MojoAsyncWaiter { | |
19 // Asynchronously call MojoWait on a background thread, and pass the result | |
20 // of MojoWait to the given MojoAsyncWaitCallback on the current thread. | |
21 // Returns a non-zero MojoAsyncWaitID that can be used with CancelWait to | |
22 // stop waiting. This identifier becomes invalid once the callback runs. | |
23 MojoAsyncWaitID (*AsyncWait)(struct MojoAsyncWaiter* waiter, | |
24 MojoHandle handle, | |
25 MojoWaitFlags flags, | |
26 MojoDeadline deadline, | |
27 MojoAsyncWaitCallback callback, | |
28 void* closure); | |
29 | |
30 // Cancel an existing call to AsyncWait with the given MojoAsyncWaitID. The | |
31 // corresponding MojoAsyncWaitCallback will not be called in this case. | |
32 void (*CancelWait)(struct MojoAsyncWaiter* waiter, | |
33 MojoAsyncWaitID wait_id); | |
34 }; | |
35 | |
36 #ifdef __cplusplus | |
37 } // extern "C" | |
38 #endif | |
39 | |
40 #endif // MOJO_PUBLIC_SYSTEM_ASYNC_WAITER_H_ | |
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