70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/*
|
|
* rwlock6.c
|
|
*
|
|
* Check writer and reader locking
|
|
*
|
|
* 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 = 0;
|
|
|
|
void * wrfunc(void * arg)
|
|
{
|
|
int ba;
|
|
|
|
assert(pthread_rwlock_wrlock(&rwlock1) == 0);
|
|
Sleep(2000);
|
|
bankAccount += 10;
|
|
ba = bankAccount;
|
|
assert(pthread_rwlock_unlock(&rwlock1) == 0);
|
|
|
|
return ((void *) ba);
|
|
}
|
|
|
|
void * rdfunc(void * arg)
|
|
{
|
|
int ba;
|
|
|
|
assert(pthread_rwlock_rdlock(&rwlock1) == 0);
|
|
ba = bankAccount;
|
|
assert(pthread_rwlock_unlock(&rwlock1) == 0);
|
|
|
|
return ((void *) ba);
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
pthread_t wrt1;
|
|
pthread_t wrt2;
|
|
pthread_t rdt;
|
|
int wr1Result = 0;
|
|
int wr2Result = 0;
|
|
int rdResult = 0;
|
|
|
|
bankAccount = 0;
|
|
|
|
assert(pthread_create(&wrt1, NULL, wrfunc, NULL) == 0);
|
|
Sleep(500);
|
|
assert(pthread_create(&rdt, NULL, rdfunc, NULL) == 0);
|
|
Sleep(500);
|
|
assert(pthread_create(&wrt2, NULL, wrfunc, NULL) == 0);
|
|
|
|
assert(pthread_join(wrt1, (void **) &wr1Result) == 0);
|
|
assert(pthread_join(rdt, (void **) &rdResult) == 0);
|
|
assert(pthread_join(wrt2, (void **) &wr2Result) == 0);
|
|
|
|
assert(wr1Result == 10);
|
|
assert(rdResult == 20);
|
|
assert(wr2Result == 20);
|
|
|
|
return 0;
|
|
}
|