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/*
* tsd1.c
*
* Test Thread Specific Data (TSD) key creation and destruction.
*
* Description:
* -
*
* Test Method (validation or falsification):
* - validation
*
* Requirements Tested:
* - keys are created for each existing thread including the main thread
* - keys are created for newly created threads
* - keys are thread specific
* - destroy routine is called on each thread exit including the main thread
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Environment:
* -
*
* Input:
* - none
*
* Output:
* - text to stdout
*
* Assumptions:
* - already validated: pthread_create()
* pthread_once()
* - main thread also has a POSIX thread identity
*
* Pass Criteria:
* - stdout matches file reference/tsd1.out
*
* Fail Criteria:
* - fails to match file reference/tsd1.out
* - output identifies failed component
*/
#include <sched.h>
#include "test.h"
static pthread_key_t key = NULL;
static int accesscount[10];
static int thread_set[10];
static int thread_destroyed[10];
static void
destroy_key(void * arg)
{
int * j = (int *) arg;
(*j)++;
assert(*j == 2);
thread_destroyed[j - accesscount] = 1;
}
static void
setkey(void * arg)
{
int * j = (int *) arg;
thread_set[j - accesscount] = 1;
assert(*j == 0);
assert(pthread_getspecific(key) == NULL);
assert(pthread_setspecific(key, arg) == 0);
assert(pthread_getspecific(key) == arg);
(*j)++;
assert(*j == 1);
}
static void *
mythread(void * arg)
{
while (key == NULL)
{
sched_yield();
}
setkey(arg);
return 0;
/* Exiting the thread will call the key destructor. */
}
int
main()
{
int i;
int fail = 0;
pthread_t thread[10];
for (i = 1; i < 5; i++)
{
accesscount[i] = thread_set[i] = thread_destroyed[i] = 0;
assert(pthread_create(&thread[i], NULL, mythread, (void *)&accesscount[i]) == 0);
}
Sleep(2000);
/*
* Here we test that existing threads will get a key created
* for them.
*/
assert(pthread_key_create(&key, destroy_key) == 0);
/*
* Test main thread key.
*/
accesscount[0] = 0;
setkey((void *) &accesscount[0]);
/*
* Here we test that new threads will get a key created
* for them.
*/
for (i = 5; i < 10; i++)
{
accesscount[i] = thread_set[i] = thread_destroyed[i] = 0;
assert(pthread_create(&thread[i], NULL, mythread, (void *)&accesscount[i]) == 0);
}
/*
* Wait for all threads to complete.
*/
for (i = 1; i < 10; i++)
{
int result = 0;
assert(pthread_join(thread[i], (void **) &result) == 0);
}
assert(pthread_key_delete(key) == 0);
for (i = 1; i < 10; i++)
{
/*
* The counter is incremented once when the key is set to
* a value, and again when the key is destroyed. If the key
* doesn't get set for some reason then it will still be
* NULL and the destroy function will not be called, and
* hence accesscount will not equal 2.
*/
if (accesscount[i] != 2)
{
fail++;
fprintf(stderr, "Thread %d key, set = %d, destroyed = %d\n",
i, thread_set[i], thread_destroyed[i]);
}
}
fflush(stderr);
return (fail);
}
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