contrib/libjeffpc/test_atomic-single-thread.c

   1 /*
   2  * Copyright (c) 2016 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include <jeffpc/atomic.h>
  24 #include <jeffpc/int.h>
  25
  26 #include "test.c"
  27
  28 #define INITIAL         5ll
  29
  30 static void check(const char *type, const char *msg, uint64_t got, uint64_t exp)
  31 {
  32         fprintf(stderr, "%s: checking: %s\n", type, msg);
  33         fprintf(stderr, "%s:    expected: %"PRIu64"\n", type, exp);
  34         fprintf(stderr, "%s:    got:      %"PRIu64"\n", type, got);
  35
  36         if (exp != got)
  37                 fail("%s mismatch!", type);
  38 }
  39
  40 #define TEST(type, negone)                                              \
  41 do {                                                                    \
  42         const char *t = #type;                                          \
  43         fprintf(stderr, "%s: testing...\n", t);                         \
  44                                                                         \
  45         do {                                                            \
  46                 type v;                                                 \
  47                                                                         \
  48                 atomic_set(&v, INITIAL);                                \
  49                                                                         \
  50                 /* yes, we are reaching into the implementation here */ \
  51                 check(t, "contents valid", v.v, INITIAL);               \
  52                                                                         \
  53                 check(t, "read-after-init", atomic_read(&v), INITIAL);  \
  54                                                                         \
  55                 check(t, "increment-return", atomic_inc(&v), INITIAL + 1);\
  56                 check(t, "read-after-inc", atomic_read(&v), INITIAL + 1);\
  57                 check(t, "add-return", atomic_add(&v, 10), INITIAL + 11);\
  58                 check(t, "read-after-add", atomic_read(&v), INITIAL + 11);\
  59                                                                         \
  60                 check(t, "decrement-return", atomic_dec(&v), INITIAL + 10);\
  61                 check(t, "read-after-dec", atomic_read(&v), INITIAL + 10);\
  62                 check(t, "sub-return", atomic_sub(&v, 10), INITIAL);    \
  63                 check(t, "read-after-sub", atomic_read(&v), INITIAL);   \
  64                                                                         \
  65                 check(t, "go-to-zero", atomic_sub(&v, INITIAL), 0);     \
  66                 check(t, "go-negative", atomic_dec(&v), negone);        \
  67                 check(t, "go-more-negative", atomic_sub(&v, 10),        \
  68                       negone - 10);                                     \
  69                                                                         \
  70                 check(t, "go-positive", atomic_add(&v, 20), 9);         \
  71                                                                         \
  72                 check(t, "cas-match", atomic_cas(&v, 9, 50), 9);        \
  73                 check(t, "cas-mismatch", atomic_cas(&v, 50, 1), 50);    \
  74         } while (0);                                                    \
  75                                                                         \
  76         fprintf(stderr, "%s: ok.\n", t);                                \
  77 } while (0)
  78
  79 void test(void)
  80 {
  81         TEST(atomic_t, 4294967295);
  82         TEST(atomic64_t, 18446744073709551615ull);
  83 }