| /* |
| * 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) |
| * |
| * This case will always PASS. |
| * |
| * The functions may fail if: |
| * The pthread_spin_unlock() function may fail if: |
| * [EPERM] The calling thread does not hold the lock. |
| * |
| * Steps: |
| * 1. Create a thread that will initialize and lock a spinlock |
| * 2. Main will try to unlock the spinlock (it doesn't hold the lock) |
| * 3. Check the return code to see if it returns [EPERM]. |
| * |
| * Note: This test will always pass since the standard specifies 'may' fail. |
| * |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <errno.h> |
| #include "posixtest.h" |
| |
| static pthread_spinlock_t spinlock; |
| volatile static int sem; |
| |
| #define INTHREAD 0 |
| #define INMAIN 1 |
| |
| static void* fn_chld(void *arg) |
| { |
| int rc = 0; |
| |
| /* Initialize spin lock */ |
| if (pthread_spin_init(&spinlock, PTHREAD_PROCESS_PRIVATE) != 0) |
| { |
| printf("main: Error at pthread_spin_init()\n"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| /* Lock the spinlock */ |
| printf("thread: attempt spin lock\n"); |
| rc = pthread_spin_lock(&spinlock); |
| if (rc != 0) |
| { |
| printf("Error: thread failed to get spin lock error code:%d\n" , rc); |
| exit(PTS_UNRESOLVED); |
| } |
| printf("thread: acquired spin lock\n"); |
| |
| /* Wait for main to try and unlock this spinlock */ |
| sem = INMAIN; |
| while (sem == INMAIN) |
| sleep(1); |
| |
| /* Cleanup just in case */ |
| pthread_spin_unlock(&spinlock); |
| |
| if (pthread_spin_destroy(&spinlock) != 0) |
| { |
| printf("Error at pthread_spin_destroy()"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| pthread_exit(0); |
| return NULL; |
| } |
| |
| int main() |
| { |
| int rc; |
| pthread_t child_thread; |
| |
| sem = INTHREAD; |
| |
| /* Create a thread that will initialize and lock a spinlock */ |
| 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 lock the spinlock */ |
| while (sem == INTHREAD) |
| sleep(1); |
| |
| printf("main: attempt to unlock a spinlock that we don't own\n"); |
| rc = pthread_spin_unlock(&spinlock); |
| if (rc != 0) |
| { |
| printf("main: Error at pthread_spin_unlock()\n"); |
| return PTS_FAIL; |
| } |
| |
| /* Tell thread that we're done attempting to unlock the spinlock */ |
| sem = INTHREAD; |
| |
| /* Wait for thread to end execution */ |
| if (pthread_join(child_thread, NULL) != 0) |
| { |
| printf("main: Error at pthread_join()\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| /* Test to see the return code of pthread_spin_unlock */ |
| if (rc == EPERM) |
| { |
| printf("main: correctly got EPERM when unlocking a spinlock we didn't have permission to unlock\n"); |
| printf("Test PASSED\n"); |
| } |
| else |
| { |
| printf("main: got return code :%d\n", rc); |
| printf("Test PASSED: *Note: Did not return EPERM when unlocking a spinlock it does not have a lock on, but standard says 'may' fail\n"); |
| } |
| |
| return PTS_PASS; |
| } |