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/*
* File: errn1.c
*
* Test Synopsis: Test thread-safety of errno
* -
*
* Test Method (Validation or Falsification):
* - Validation
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* -
*
* Environment:
* -
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - Process returns zero exit status.
*
* Fail Criteria:
* - Process returns non-zero exit status.
*/
#include "test.h"
/*
* Create NUMTHREADS threads in addition to the Main thread.
*/
enum {
NUMTHREADS = 3
};
typedef struct bag_t_ bag_t;
struct bag_t_ {
int threadnum;
int started;
/* Add more per-thread state variables here */
};
static bag_t threadbag[NUMTHREADS + 1];
pthread_mutex_t stop_here = PTHREAD_MUTEX_INITIALIZER;
void *
mythread(void * arg)
{
bag_t * bag = (bag_t *) arg;
assert(bag == &threadbag[bag->threadnum]);
assert(bag->started == 0);
bag->started = 1;
errno = bag->threadnum;
Sleep(1000);
pthread_mutex_lock(&stop_here);
assert(errno == bag->threadnum);
pthread_mutex_unlock(&stop_here);
Sleep(1000);
return 0;
}
int
main()
{
int failed = 0;
int i;
pthread_t t[NUMTHREADS + 1];
pthread_mutex_lock(&stop_here);
errno = 0;
assert((t[0] = pthread_self()) != NULL);
for (i = 1; i <= NUMTHREADS; i++)
{
threadbag[i].started = 0;
threadbag[i].threadnum = i;
assert(pthread_create(&t[i], NULL, mythread, (void *) &threadbag[i]) == 0);
}
/*
* Code to control or munipulate child threads should probably go here.
*/
Sleep(2000);
pthread_mutex_unlock(&stop_here);
/*
* Give threads time to run.
*/
Sleep(NUMTHREADS * 1000);
/*
* Standard check that all threads started.
*/
for (i = 1; i <= NUMTHREADS; i++)
{
failed = !threadbag[i].started;
if (failed)
{
fprintf(stderr, "Thread %d: started %d\n", i, threadbag[i].started);
}
}
assert(!failed);
/*
* Check any results here. Set "failed" and only print ouput on failure.
*/
for (i = 1; i <= NUMTHREADS; i++)
{
/* ... */
}
assert(!failed);
/*
* Success.
*/
return 0;
}
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