From 99bf48ba0f224f965c99e632656190a86ad099b9 Mon Sep 17 00:00:00 2001 From: rpj Date: Thu, 16 Sep 1999 15:04:39 +0000 Subject: Sep 16 1999 Ross Johnson * rwlock6.c: New test. --- tests/rwlock6.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 tests/rwlock6.c (limited to 'tests/rwlock6.c') diff --git a/tests/rwlock6.c b/tests/rwlock6.c new file mode 100644 index 0000000..38bc419 --- /dev/null +++ b/tests/rwlock6.c @@ -0,0 +1,65 @@ +/* + * rwlock6.c + * + * Check that writer locks have priority. + * + * Depends on API functions: + * pthread_rwlock_rdlock() + * pthread_rwlock_wrlock() + * pthread_rwlock_unlock() + */ + +#include "test.h" + +static pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER; + +static int bankAccount; + +void * wrfunc(void * arg) +{ + assert(pthread_rwlock_wrlock(&rwlock1) == 0); + Sleep(1000); + bankAccount += 10; + assert(pthread_rwlock_unlock(&rwlock1) == 0); + + return((void *) bankAccount); +} + +void * rdfunc(void * arg) +{ + int ba = 0; + + assert(pthread_rwlock_rdlock(&rwlock1) == 0); + ba = bankAccount; + assert(pthread_rwlock_unlock(&rwlock1) == 0); + + ba += 10; + return((void *) ba); +} + +int +main() +{ + pthread_t wrt1; + pthread_t wrt2; + pthread_t rdt; + int wr1Result = 0; + int wr2Result = 0; + int rdResult = 0; + + assert(pthread_create(&wrt1, NULL, wrfunc, NULL) == 0); + Sleep(200); + assert(pthread_create(&rdt, NULL, rdfunc, NULL) == 0); + Sleep(200); + assert(pthread_create(&wrt2, NULL, wrfunc, NULL) == 0); + + assert(pthread_join(wrt1, (void *) &wr1Result) == 0); + assert(pthread_join(wrt2, (void *) &wr2Result) == 0); + assert(pthread_join(rdt, (void *) &rdResult) == 0); + + assert(wr1Result == 10); + assert(wr2Result == 20); + assert(rdResult == 30); + + return 0; +} -- cgit v1.2.3