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#include <print.h>
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#include <print.h>
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#include <proc/thread.h>
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#include <proc/thread.h>
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#include <synch/rwlock.h>
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#include <synch/rwlock.h>
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#define READERS     50
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#define THREADS 4
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#define WRITERS     50
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static atomic_t thread_count;
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static rwlock_t rwlock;
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static rwlock_t rwlock;
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static bool sh_quiet;
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static void reader(void *arg)
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static void reader(void *arg)
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{
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{
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    thread_detach(THREAD);
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    thread_detach(THREAD);
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    if (!sh_quiet)
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    printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", CPU->id, THREAD->tid);    
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        printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", CPU->id, THREAD->tid);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_unlock(&rwlock);   
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    rwlock_read_unlock(&rwlock);
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    if (!sh_quiet) {
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    printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);          
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        printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);          
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    printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", CPU->id, THREAD->tid);    
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        printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", CPU->id, THREAD->tid);    
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    }
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    rwlock_write_lock(&rwlock);
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    rwlock_write_lock(&rwlock);
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    rwlock_write_unlock(&rwlock);
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    rwlock_write_unlock(&rwlock);
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    if (!sh_quiet)
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    printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);              
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        printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);
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    atomic_dec(&thread_count);
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}
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}
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char * test_rwlock3(bool quiet)
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char * test_rwlock3(bool quiet)
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{
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{
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    int i;
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    int i;
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    thread_t *thrd;
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    thread_t *thrd;
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    sh_quiet = quiet;
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    atomic_set(&thread_count, THREADS);
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    rwlock_initialize(&rwlock);
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    rwlock_initialize(&rwlock);
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    rwlock_write_lock(&rwlock);
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    rwlock_write_lock(&rwlock);
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    for (i = 0; i < 4; i++) {
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    for (i = 0; i < THREADS; i++) {
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        thrd = thread_create(reader, NULL, TASK, 0, "reader", false);
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        thrd = thread_create(reader, NULL, TASK, 0, "reader", false);
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        if (thrd)
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        if (thrd)
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            thread_ready(thrd);
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            thread_ready(thrd);
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        else
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        else if (!quiet)
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            printf("Could not create reader %d\n", i);
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            printf("Could not create reader %d\n", i);
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    }
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    }
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    thread_sleep(1);
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    thread_sleep(1);
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    rwlock_write_unlock(&rwlock);
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    rwlock_write_unlock(&rwlock);
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    while (atomic_get(&thread_count) > 0) {
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        if (!quiet)
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            printf("Threads left: %d\n", atomic_get(&thread_count));
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        thread_sleep(1);
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    }
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    return NULL;
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    return NULL;
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}
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}