93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
#include <stdio.h>
|
|
|
|
/* Library code for thread local in lib test.
|
|
*/
|
|
#include "thr-lib.h"
|
|
|
|
extern pthread_mutex_t mutex;
|
|
extern int get_number();
|
|
extern int total;
|
|
extern int the_code_saw[NTHREADS][ELEMS_PER_THREAD];
|
|
|
|
/* The debugger should see this without a declaration.
|
|
*
|
|
* extern int debugger_saw[NTHREADS][ELEMS_PER_THREAD];
|
|
*/
|
|
|
|
/* The actual thread locals.
|
|
*/
|
|
__thread int sum;
|
|
__thread int x[ ELEMS_PER_THREAD ]; /* [3] */
|
|
|
|
void sumup()
|
|
{
|
|
int j;
|
|
|
|
sum = 0;
|
|
for (j = 0; j < ELEMS_PER_THREAD; j++) {
|
|
sum += x[j];
|
|
}
|
|
|
|
if( sum == x[0] )
|
|
/* It won't be "==", but this lets us set a breakpoint
|
|
* and look at the thread-local storage.
|
|
*/
|
|
sum++;
|
|
|
|
x[0] = x[2]; /* Another no-op for debugger use */
|
|
}
|
|
|
|
void *adder( vid )
|
|
void * vid;
|
|
{
|
|
int id;
|
|
int i, j;
|
|
int ret;
|
|
|
|
id = (int) vid;
|
|
|
|
/* printf( "== Thread: Welcome to adder %d\n", id ); */
|
|
|
|
for (j = 0; j < ELEMS_PER_THREAD; j++) {
|
|
x[j] = 0;
|
|
}
|
|
|
|
for (i = id, j = 0; i < NUM_ELEMS; i += NTHREADS, j++ ) {
|
|
|
|
/* printf( "== Thread: id %d, i %d, j %d\n", id, i, j );
|
|
fflush( stdout ); */
|
|
|
|
x[j] = get_number(i); /* {0,1,2,3} +0, +4, +8 */
|
|
|
|
/* Record for posterity; the debugger will gather
|
|
* the same data here, using "x[j]".
|
|
*/
|
|
the_code_saw[ id ][ j ] = x[j];
|
|
|
|
/* printf( "== Thread %d, sample %d, val %d, i %d\n", id, j, x[j],i );
|
|
fflush( stdout ); */
|
|
}
|
|
|
|
sumup();
|
|
/* printf("== Thread: adder %d contributes total %d\n", id, sum); */
|
|
|
|
/* protect global data */
|
|
ret = pthread_mutex_lock(&mutex);
|
|
if (ret != 0) {
|
|
printf("== Thread: pthread_mutex_lock() error: %d\n", ret);
|
|
exit(1);
|
|
}
|
|
|
|
total += sum;
|
|
|
|
ret = pthread_mutex_unlock(&mutex);
|
|
if (ret != 0) {
|
|
printf("== Thread: pthread_mutex_unlock() error: %d\n", ret);
|
|
exit(1);
|
|
}
|
|
|
|
if( NTHREADS != 4 || ELEMS_PER_THREAD != 3 || NUM_ELEMS != 12 ) {
|
|
printf( "** ERROR in test code **\n" );
|
|
}
|
|
}
|