| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #include <magenta/types.h> |
| #include <magenta/compiler.h> |
| |
| #include <stdatomic.h> |
| |
| __BEGIN_CDECLS; |
| |
| typedef struct { |
| atomic_int futex; |
| } completion_t; |
| |
| #define COMPLETION_INIT ((completion_t){0}) |
| |
| // Returns MX_ERR_TIMED_OUT if timeout elapses, and MX_OK if woken by |
| // a call to completion_wake or if the completion has already been |
| // signaled. |
| mx_status_t completion_wait(completion_t* completion, mx_time_t timeout); |
| |
| // Awakens all waiters on the completion, and marks the it as |
| // signaled. Waits after this call but before a reset of the |
| // completion will also see the signal and immediately return. |
| void completion_signal(completion_t* completion); |
| |
| // Resets the completion's signaled state to unsignaled. |
| void completion_reset(completion_t* completion); |
| |
| __END_CDECLS; |
