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/* Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include "thr_template.c"
#include "my_atomic.h"
volatile uint32 b32;
volatile int32 c32;
/* add and sub a random number in a loop. Must get 0 at the end */
pthread_handler_t test_atomic_add(void *arg)
{
int m= (*(int *)arg)/2;
int32 x;
for (x= ((int)(intptr)(&m)); m ; m--)
{
x= (x*m+0x87654321) & INT_MAX32;
my_atomic_add32(&bad, x);
my_atomic_add32(&bad, -x);
}
return 0;
}
volatile int64 a64;
/* add and sub a random number in a loop. Must get 0 at the end */
pthread_handler_t test_atomic_add64(void *arg)
{
int m= (*(int *)arg)/2;
int64 x;
for (x= ((int64)(intptr)(&m)); m ; m--)
{
x= (x*m+0xfdecba987654321LL) & INT_MAX64;
my_atomic_add64(&a64, x);
my_atomic_add64(&a64, -x);
}
return 0;
}
/*
1. generate thread number 0..N-1 from b32
2. add it to bad
3. swap thread numbers in c32
4. (optionally) one more swap to avoid 0 as a result
5. subtract result from bad
must get 0 in bad at the end
*/
pthread_handler_t test_atomic_fas(void *arg)
{
int m= *(int *)arg;
int32 x;
x= my_atomic_add32(&b32, 1);
my_atomic_add32(&bad, x);
for (; m ; m--)
x= my_atomic_fas32(&c32, x);
if (!x)
x= my_atomic_fas32(&c32, x);
my_atomic_add32(&bad, -x);
return 0;
}
/*
same as test_atomic_add, but my_atomic_add32 is emulated with
my_atomic_cas32 - notice that the slowdown is proportional to the
number of CPUs
*/
pthread_handler_t test_atomic_cas(void *arg)
{
int m= (*(int *)arg)/2, ok= 0;
int32 x, y;
for (x= ((int)(intptr)(&m)); m ; m--)
{
y= my_atomic_load32(&bad);
x= (x*m+0x87654321) & INT_MAX32;
do {
ok= my_atomic_cas32((int32*) &bad, &y, y+x);
} while (!ok) ;
do {
ok= my_atomic_cas32((int32*) &bad, &y, y-x);
} while (!ok) ;
}
return 0;
}
void do_tests()
{
plan(5);
b32= c32= 0;
test_concurrently("my_atomic_add32", test_atomic_add, THREADS, CYCLES);
b32= c32= 0;
test_concurrently("my_atomic_fas32", test_atomic_fas, THREADS, CYCLES);
b32= c32= 0;
test_concurrently("my_atomic_cas32", test_atomic_cas, THREADS, CYCLES);
{
/*
If b is not volatile, the wrong assembly code is generated on OSX Lion
as the variable is optimized away as a constant.
See Bug#62533 / Bug#13030056.
Another workaround is to specify architecture explicitly using e.g.
CFLAGS/CXXFLAGS= "-m64".
*/
volatile int64 b=0x1000200030004000LL;
a64=0;
my_atomic_add64(&a64, b);
ok(a64==b, "add64");
}
a64=0;
test_concurrently("my_atomic_add64", test_atomic_add64, THREADS, CYCLES);
bad= (a64 != 0);
}
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