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/* Thread local in a library.
*/
#include "thr-lib.h"
/*
* #define NTHREADS 4
* #define NUM_ELEMS 12
*/
extern void* adder( void * );
pthread_mutex_t mutex; /* mutex for protecting global data total */
int numbers[NUM_ELEMS] = {5, 4, 3, 2, 1, 6, 7, 8, 9, 10, 12, 11};
int total = 0;
int debugger_saw[NTHREADS][ELEMS_PER_THREAD]; /* [4][3] */
int the_code_saw[NTHREADS][ELEMS_PER_THREAD];
int get_number(i)
int i;
{
/* sleep to force context switch to another thread in non-MP system
* so that TLS symbols are used by multiple threads concurrently
* in some way.
*/
sleep(1);
return numbers[i];
}
main()
{
pthread_t thread[NTHREADS];
void *status;
int i, j, ret;
printf("== Thread: Test started\n");
for( i = 0; i < NTHREADS; i++ ) {
for( j = 0; j < ELEMS_PER_THREAD; j++ ) {
debugger_saw[i][j] = 0;
the_code_saw[i][j] = 0;
}
}
ret = pthread_mutex_init(&mutex, NULL);
if (ret != 0) {
printf("== Thread: pthread_mutex_init() error: %d\n", ret);
exit(1);
}
for (i=0; i < NTHREADS; i++) {
ret = pthread_create( &thread[i],
NULL,
adder,
(void *) i);
if (ret != 0) {
printf("== Thread: pthread_create() error: %d\n", ret);
exit(1);
}
printf("== Thread: thread %d created\n", i);
}
for (i=0; i < NTHREADS; i++) {
pthread_join( thread[i], &status);
}
printf("== Thread: total = %d\n", total); /* Expect "78" */
for( i = 0; i < NTHREADS; i++ ) {
for( j = 0; j < ELEMS_PER_THREAD; j++ ) {
printf( "== Thread: the debugger saw %d, the program saw %d\n",
debugger_saw[i][j],
the_code_saw[i][j] );
}
}
printf("== Thread: Test ended\n");
exit(0);
}
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