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34 lines
821 B
C
34 lines
821 B
C
/*
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* Copyright (C) 2023 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include "peterson.h"
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void
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peterson_lock_acquire(peterson_lock_t *lock, int thread_id)
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{
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// this threads wants to enter the cs
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lock->flag[thread_id] = true;
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// assume the other thread has priority
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int other_thread = 1 - thread_id;
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lock->turn = other_thread;
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while (lock->turn == other_thread && lock->flag[other_thread]) {
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// Busy wait
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}
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}
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int
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main()
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{
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pthread_t thread1, thread2;
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printf("============ test naive peterson lock(should trap) ============\n");
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printf("============ May not be able to observe in interpreter mode "
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"============\n");
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run_test(&thread1, &thread2, test_peterson_lock_atomicity);
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return 0;
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} |