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Rev 2787 Rev 4377
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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 READERS  50
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#define WRITERS     50
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#define WRITERS  50
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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 writer(void *arg)
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static void writer(void *arg)
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{
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{
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    if (!sh_quiet)
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        printf("Trying to lock rwlock for writing....\n");
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    TPRINTF("Trying to lock rwlock for writing....\n");
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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("Trying to lock rwlock for reading....\n");
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    TPRINTF("Trying to lock rwlock for reading....\n");
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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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}
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}
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char * test_rwlock2(bool quiet)
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char *test_rwlock2(void)
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{
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{
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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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    rwlock_initialize(&rwlock);
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    rwlock_initialize(&rwlock);
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- 
 
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock);
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    rwlock_read_lock(&rwlock); 
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    thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
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    thrd = thread_create(writer, NULL, TASK, 0, "writer", 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
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        return "Could not create thread";
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        return "Could not create thread";
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    thread_sleep(1);
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    thread_sleep(1);
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    rwlock_read_unlock(&rwlock);
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    rwlock_read_unlock(&rwlock);
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    rwlock_read_unlock(&rwlock);
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    rwlock_read_unlock(&rwlock);
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    rwlock_read_unlock(&rwlock);
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    rwlock_read_unlock(&rwlock);