From 9031537658e89136c6a5bb959f9b9a4338a5d056 Mon Sep 17 00:00:00 2001 From: rpj Date: Wed, 15 Sep 1999 00:56:21 +0000 Subject: Sat Sep 10 12:56:13 1999 Ross Johnson The following code for POSIX read/write locks was contributed by Aurelio Medina. * implement.h (pthread_rwlock_t_): Add. * pthread.h (pthread_rwlock_t): Add. (PTHREAD_RWLOCK_INITIALIZER): Add. Add rwlock function prototypes. * rwlock.c: New module. * pthread.def: Add new rwlock functions. * private.c (_pthread_processInitialize): initialise _pthread_rwlock_test_init_lock critical section. * global.c (_pthread_rwlock_test_init_lock): Add. * mutex.c (pthread_mutex_destroy): Don't free mutex memory if mutex is PTHREAD_MUTEX_INITIALIZER and has not been initialised yet. tests/ChangeLog Sep 15 1999 Ross Johnson * rwlock1.c: New test. * rwlock2.c: New test. * rwlock3.c: New test. * rwlock4.c: New test. --- tests/rwlock4.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 tests/rwlock4.c (limited to 'tests/rwlock4.c') diff --git a/tests/rwlock4.c b/tests/rwlock4.c new file mode 100644 index 0000000..07e4cff --- /dev/null +++ b/tests/rwlock4.c @@ -0,0 +1,44 @@ +/* + * rwlock3.c + * + * Declare a static rwlock object, rdlock it, trywrlock it, + * and then unlock it again. + * + * Depends on API functions: + * pthread_rwlock_rdlock() + * pthread_rwlock_trywrlock() + * pthread_rwlock_unlock() + */ + +#include "test.h" + +pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER; + +static int washere = 0; + +void * func(void * arg) +{ + assert(pthread_rwlock_trywrlock(&rwlock1) == EBUSY); + + washere = 1; + + return 0; +} + +int +main() +{ + pthread_t t; + + assert(pthread_rwlock_rdlock(&rwlock1) == 0); + + assert(pthread_create(&t, NULL, func, NULL) == 0); + + Sleep(2000); + + assert(pthread_rwlock_unlock(&rwlock1) == 0); + + assert(washere == 1); + + return 0; +} -- cgit v1.2.3