| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| * |
| * Test pthread_spin_unlock(pthread_spinlock_t *lock) |
| * |
| * The function shall release the spin lock referenced by 'lock' which |
| * was locked via the pthread_spin_lock() or pthread_spin_trylock(). |
| * |
| * Steps: |
| * 1. Initialize a pthread_spinlock_t object 'spinlock' with |
| * pthread_spin_init() |
| * 2. Main thread lock 'spinlock' with pthread_spin_lock(), should get the lock |
| * 3. Main thread unlock 'spinlock' |
| * 4. Create a child thread. The thread try to lock 'spinlock', with |
| * pthread_spin_trylock(), should get the lock. |
| * 5. Child thread unlock |
| * 6. Main thread lock 'spinlock', using pthread_spin_trylock(), should get |
| * lock |
| * 7. Main thread unlock 'spinlock' |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include "posixtest.h" |
| |
| static pthread_spinlock_t spinlock; |
| volatile static int thread_state; |
| |
| #define NOT_CREATED_THREAD 1 |
| #define ENTERED_THREAD 2 |
| #define EXITING_THREAD 3 |
| |
| static void* fn_chld(void *arg) |
| { |
| int rc = 0; |
| thread_state = ENTERED_THREAD; |
| |
| printf("thread: attempt trylock\n"); |
| rc = pthread_spin_trylock(&spinlock); |
| if (rc != 0) |
| { |
| printf("Test FAILED: thread failed to get spin lock," |
| "Error code:%d\n" , rc); |
| exit(PTS_FAIL); |
| } |
| printf("thread: acquired spin lock\n"); |
| |
| printf("thread: unlock spin lock\n"); |
| if (pthread_spin_unlock(&spinlock)) |
| { |
| printf("thread: Error at pthread_spin_unlock()\n"); |
| exit(PTS_FAIL); |
| } |
| |
| thread_state = EXITING_THREAD; |
| pthread_exit(0); |
| return NULL; |
| } |
| |
| int main() |
| { |
| int rc; |
| |
| pthread_t child_thread; |
| |
| if (pthread_spin_init(&spinlock, PTHREAD_PROCESS_PRIVATE) != 0) |
| { |
| printf("main: Error at pthread_spin_init()\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("main: attempt spin lock\n"); |
| |
| /* We should get the lock */ |
| if (pthread_spin_lock(&spinlock) != 0) |
| { |
| printf("main: cannot get spin lock when no one owns the lock\n"); |
| return PTS_UNRESOLVED; |
| } |
| printf("main: acquired spin lock\n"); |
| |
| printf("main: unlock spin lock\n"); |
| rc = pthread_spin_unlock(&spinlock); |
| if (rc != 0) |
| { |
| printf("main: Error at pthread_spin_unlock()\n"); |
| return PTS_FAIL; |
| } |
| |
| thread_state = NOT_CREATED_THREAD; |
| printf("main: create thread\n"); |
| if (pthread_create(&child_thread, NULL, fn_chld, NULL) != 0) |
| { |
| printf("main: Error creating thread\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Wait for thread to end execution */ |
| if (pthread_join(child_thread, NULL) != 0) |
| { |
| printf("main: Error at pthread_join()\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("main: try to lock again when thread unlocked\n"); |
| if (pthread_spin_trylock(&spinlock) != 0) |
| { |
| printf("main: Should get spin lock\n"); |
| return PTS_FAIL; |
| } |
| |
| printf("main: acquired spin lock\n"); |
| printf("main: unlock spin lock\n"); |
| if (pthread_spin_unlock(&spinlock) != 0) |
| { |
| printf("Test FAILED: main: Error at pthread_spin_unlock()\n"); |
| return PTS_FAIL; |
| } |
| |
| if (pthread_spin_destroy(&spinlock) != 0) |
| { |
| printf("Error at pthread_spin_destroy()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |