diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile index 1a9f2559d9..2fee4a34e7 100644 --- a/sysdeps/pthread/Makefile +++ b/sysdeps/pthread/Makefile @@ -268,6 +268,7 @@ tests += \ tst-spin2 \ tst-spin3 \ tst-spin4 \ + tst-spin5 \ tst-stack1 \ tst-stdio1 \ tst-stdio2 \ diff --git a/sysdeps/pthread/tst-spin5.c b/sysdeps/pthread/tst-spin5.c new file mode 100644 index 0000000000..5c23bd48ef --- /dev/null +++ b/sysdeps/pthread/tst-spin5.c @@ -0,0 +1,82 @@ +/* Threaded test the pthread_spin_trylock function. + Copyright (C) 2024 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#include +#include + +pthread_spinlock_t lock; + +void * +thread (void *arg) +{ + int ret; + int thr_id = *(int *) arg; + + ret = pthread_spin_trylock (&lock); + if (thr_id == 1) + /* thread with already acquired lock. */ + { + if (ret != EBUSY) + { + FAIL_EXIT1 ("pthread_spin_trylock should fail with EBUSY"); + } + } + else if (thr_id == 2) + /* thread with released spin lock. */ + { + if (ret != 0) + { + FAIL_EXIT1 ("pthread_spin_trylock should be able to acquire lock"); + } + } + return NULL; +} + +static int +do_test (void) +{ + pthread_t thr1, thr2; + int ret; + int thr1_id = 1, thr2_id = 2; + + pthread_spin_init (&lock, PTHREAD_PROCESS_PRIVATE); + /* lock spin in main thread. */ + ret = pthread_spin_trylock (&lock); + if (ret != 0) + { + FAIL_EXIT1 ("Main thread should be able to acquire spin lock"); + } + + /* create first thread to try locking already acquired spin lock. */ + thr1 = xpthread_create (NULL, thread, &thr1_id); + xpthread_join (thr1); + + /* release spin lock and create thread to acquire released spin lock. */ + pthread_spin_unlock (&lock); + thr2 = xpthread_create (NULL, thread, &thr2_id); + xpthread_join (thr2); + + pthread_spin_destroy (&lock); + return 0; +} + +#include