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      1 /* Copyright (c) 2015, Google Inc.
      2  *
      3  * Permission to use, copy, modify, and/or distribute this software for any
      4  * purpose with or without fee is hereby granted, provided that the above
      5  * copyright notice and this permission notice appear in all copies.
      6  *
      7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     10  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
     12  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
     13  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
     14 
     15 #include "internal.h"
     16 
     17 #include <gtest/gtest.h>
     18 
     19 
     20 TEST(RefCountTest, Basic) {
     21   CRYPTO_refcount_t count = 0;
     22 
     23   CRYPTO_refcount_inc(&count);
     24   EXPECT_EQ(1u, count);
     25 
     26   EXPECT_TRUE(CRYPTO_refcount_dec_and_test_zero(&count));
     27   EXPECT_EQ(0u, count);
     28 
     29   count = CRYPTO_REFCOUNT_MAX;
     30   CRYPTO_refcount_inc(&count);
     31   EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
     32       << "Count did not saturate correctly when incrementing.";
     33   EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
     34   EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
     35       << "Count did not saturate correctly when decrementing.";
     36 
     37   count = 2;
     38   EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
     39   EXPECT_EQ(1u, count);
     40 }
     41