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Test pg_atomic_fetch_add_ with variable addend and 16-bit edge cases.

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Back-patch to 9.5, which introduced these functions.

Reviewed by Tom Lane.

Discussion: https://postgr.es/m/20190831071157.GA3251746@rfd.leadboat.com
This commit is contained in:
Noah Misch
2019-09-13 19:33:30 -07:00
parent 4f7dbf0ef5
commit e6a90ded5a
1 changed files with 16 additions and 2 deletions
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18
src/test/regress/regress.c
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@@ -928,7 +928,7 @@ test_atomic_uint32(void)
if (pg_atomic_read_u32(&var) != 3) if (pg_atomic_read_u32(&var) != 3)
elog(ERROR, "atomic_read_u32() #2 wrong"); elog(ERROR, "atomic_read_u32() #2 wrong");
if (pg_atomic_fetch_add_u32(&var, 1) != 3) if (pg_atomic_fetch_add_u32(&var, pg_atomic_read_u32(&var) - 2) != 3)
elog(ERROR, "atomic_fetch_add_u32() #1 wrong"); elog(ERROR, "atomic_fetch_add_u32() #1 wrong");
if (pg_atomic_fetch_sub_u32(&var, 1) != 4) if (pg_atomic_fetch_sub_u32(&var, 1) != 4)
@@ -953,6 +953,20 @@ test_atomic_uint32(void)
if (pg_atomic_fetch_add_u32(&var, INT_MAX) != INT_MAX) if (pg_atomic_fetch_add_u32(&var, INT_MAX) != INT_MAX)
elog(ERROR, "pg_atomic_add_fetch_u32() #3 wrong"); elog(ERROR, "pg_atomic_add_fetch_u32() #3 wrong");
pg_atomic_fetch_add_u32(&var, 2); /* wrap to 0 */
if (pg_atomic_fetch_add_u32(&var, PG_INT16_MAX) != 0)
elog(ERROR, "pg_atomic_fetch_add_u32() #3 wrong");
if (pg_atomic_fetch_add_u32(&var, PG_INT16_MAX + 1) != PG_INT16_MAX)
elog(ERROR, "pg_atomic_fetch_add_u32() #4 wrong");
if (pg_atomic_fetch_add_u32(&var, PG_INT16_MIN) != 2 * PG_INT16_MAX + 1)
elog(ERROR, "pg_atomic_fetch_add_u32() #5 wrong");
if (pg_atomic_fetch_add_u32(&var, PG_INT16_MIN - 1) != PG_INT16_MAX)
elog(ERROR, "pg_atomic_fetch_add_u32() #6 wrong");
pg_atomic_fetch_add_u32(&var, 1); /* top up to UINT_MAX */ pg_atomic_fetch_add_u32(&var, 1); /* top up to UINT_MAX */
if (pg_atomic_read_u32(&var) != UINT_MAX) if (pg_atomic_read_u32(&var) != UINT_MAX)
@@ -1028,7 +1042,7 @@ test_atomic_uint64(void)
if (pg_atomic_read_u64(&var) != 3) if (pg_atomic_read_u64(&var) != 3)
elog(ERROR, "atomic_read_u64() #2 wrong"); elog(ERROR, "atomic_read_u64() #2 wrong");
if (pg_atomic_fetch_add_u64(&var, 1) != 3) if (pg_atomic_fetch_add_u64(&var, pg_atomic_read_u64(&var) - 2) != 3)
elog(ERROR, "atomic_fetch_add_u64() #1 wrong"); elog(ERROR, "atomic_fetch_add_u64() #1 wrong");
if (pg_atomic_fetch_sub_u64(&var, 1) != 4) if (pg_atomic_fetch_sub_u64(&var, 1) != 4)