gdb/testsuite/gdb.hp/thr-lib.c

   1 /* Thread local in a library.
   2 */
   3 #include "thr-lib.h"
   4 /*
   5  *     #define NTHREADS    4
   6  *     #define NUM_ELEMS  12
   7  */
   8
   9 extern void* adder( void * );
  10
  11 pthread_mutex_t mutex; /* mutex for protecting global data total */
  12
  13 int numbers[NUM_ELEMS] = {5, 4, 3, 2, 1, 6, 7, 8, 9, 10, 12, 11};
  14 int total = 0;
  15
  16 int debugger_saw[NTHREADS][ELEMS_PER_THREAD]; /* [4][3] */
  17 int the_code_saw[NTHREADS][ELEMS_PER_THREAD];
  18
  19 int get_number(i)
  20 int i;
  21 {
  22    /* sleep to force context switch to another thread in non-MP system
  23     * so that TLS symbols are used by multiple threads concurrently
  24     * in some way.
  25     */
  26    sleep(1);
  27    return numbers[i];
  28 }
  29
  30 main()
  31 {
  32    pthread_t    thread[NTHREADS];
  33    void         *status;
  34    int          i, j, ret;
  35
  36    printf("== Thread: Test started\n");
  37
  38    for( i = 0; i < NTHREADS; i++ ) {
  39        for( j = 0; j < ELEMS_PER_THREAD; j++ ) {
  40            debugger_saw[i][j] = 0;
  41            the_code_saw[i][j] = 0;
  42        }
  43    }
  44
  45    ret = pthread_mutex_init(&mutex, NULL);
  46    if (ret != 0) {
  47       printf("== Thread: pthread_mutex_init() error: %d\n", ret);
  48       exit(1);
  49    }
  50
  51    for (i=0; i < NTHREADS; i++) {
  52       ret = pthread_create( &thread[i],
  53                             NULL,
  54                             adder,
  55                             (void *) i);
  56       if (ret != 0) {
  57          printf("== Thread: pthread_create() error: %d\n", ret);
  58          exit(1);
  59       }
  60       printf("== Thread: thread %d created\n", i);
  61    }
  62
  63    for (i=0; i < NTHREADS; i++) {
  64       pthread_join( thread[i], &status);
  65    }
  66
  67    printf("== Thread: total = %d\n", total); /* Expect "78" */
  68
  69    for( i = 0; i < NTHREADS; i++ ) {
  70        for( j = 0; j < ELEMS_PER_THREAD; j++ ) {
  71            printf( "== Thread: the debugger saw %d, the program saw %d\n",
  72                    debugger_saw[i][j],
  73                    the_code_saw[i][j] );
  74        }
  75    }
  76
  77    printf("== Thread: Test ended\n");
  78    exit(0);
  79 }