tests/test_uatomic.c

   1 /*
   2  * test_uatomic.c
   3  *
   4  * Userspace RCU library - test atomic operations
   5  *
   6  * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <stdio.h>
  24 #include <assert.h>
  25 #include <urcu/uatomic.h>
  26
  27 struct testvals {
  28         unsigned char c;
  29         unsigned short s;
  30         unsigned int i;
  31         unsigned long l;
  32 };
  33
  34 static struct testvals vals;
  35
  36 #define do_test(ptr)                            \
  37 do {                                            \
  38         __typeof__(*(ptr)) v;                   \
  39                                                 \
  40         uatomic_add(ptr, 10);                   \
  41         assert(uatomic_read(ptr) == 10);                \
  42         uatomic_add(ptr, -11UL);                        \
  43         assert(uatomic_read(ptr) == (__typeof__(*(ptr)))-1UL);  \
  44         v = uatomic_cmpxchg(ptr, -1UL, 22);             \
  45         assert(uatomic_read(ptr) == 22);                \
  46         assert(v == (__typeof__(*(ptr)))-1UL);  \
  47         v = uatomic_cmpxchg(ptr, 33, 44);               \
  48         assert(uatomic_read(ptr) == 22);                \
  49         assert(v == 22);                        \
  50         v = uatomic_xchg(ptr, 55);                      \
  51         assert(uatomic_read(ptr) == 55);                \
  52         assert(v == 22);                        \
  53         uatomic_set(ptr, 22);                   \
  54         uatomic_inc(ptr);                       \
  55         assert(uatomic_read(ptr) == 23);                \
  56         uatomic_dec(ptr);                       \
  57         assert(uatomic_read(ptr) == 22);                \
  58         v = uatomic_add_return(ptr, 74);        \
  59         assert(v == 96);                        \
  60         assert(uatomic_read(ptr) == 96);        \
  61         uatomic_or(ptr, 58);                    \
  62         assert(uatomic_read(ptr) == 122);       \
  63         v = uatomic_sub_return(ptr, 1);         \
  64         assert(v == 121);                       \
  65         assert(uatomic_read(ptr) == 121);       \
  66         uatomic_and(ptr, 129);                  \
  67         assert(uatomic_read(ptr) == 1);         \
  68 } while (0)
  69
  70 int main(int argc, char **argv)
  71 {
  72 #ifdef UATOMIC_HAS_ATOMIC_BYTE
  73         do_test(&vals.c);
  74 #endif
  75 #ifdef UATOMIC_HAS_ATOMIC_SHORT
  76         do_test(&vals.s);
  77 #endif
  78         do_test(&vals.i);
  79         do_test(&vals.l);
  80         printf("Atomic ops test OK\n");
  81
  82         return 0;
  83 }