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35 lines
640 B
C
35 lines
640 B
C
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// SPDX-License-Identifier: GPL-2.0
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#ifndef BARRIER_H
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#define BARRIER_H
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/*
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* Provides a barrier synchronisation primitive.
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*
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* Copyright (C) 2020 Martin Whitaker.
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*/
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#include "spinlock.h"
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/*
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* A barrier object.
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*/
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typedef struct
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{
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int num_threads;
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volatile int count;
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spinlock_t lock;
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spinlock_t st1;
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spinlock_t st2;
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} barrier_t;
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/*
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* Initialises the barrier to block the specified number of threads.
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*/
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void barrier_init(barrier_t *barrier, int num_threads);
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/*
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* Waits for all threads to arrive at the barrier.
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*/
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void barrier_wait(barrier_t *barrier);
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#endif // BARRIER_H
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