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/*
* Copyright (c) 2012 Deng Hengyi.
*
* This test case is to test atomic compare and exchange operation.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "system.h"
#include <stdlib.h>
#include <rtems/rtems/atomic.h>
#define TEST_REPEAT 1000
#define ATOMIC_CAS_NO_BARRIER(NAME, TYPE, R_TYPE, task_id, mem_bar) \
{ \
Atomic_##TYPE t; \
R_TYPE a; \
R_TYPE b; \
unsigned int i; \
int r; \
for (i = 0; i < TEST_REPEAT; i++){ \
a = rand() % (R_TYPE)-1; \
_Atomic_Store_##NAME(&t, a, ATOMIC_ORDER_RELAXED); \
b = a + 1; \
r = _Atomic_Compare_exchange_##NAME(&t, &b, a - 1, mem_bar, memory_order_relaxed); \
if(r != 0){ \
printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)task_id); \
rtems_test_exit( 0 ); \
} \
_Atomic_Store_##NAME(&t, a, ATOMIC_ORDER_RELAXED); \
r = _Atomic_Compare_exchange_##NAME(&t, &a, a - 1, mem_bar, memory_order_relaxed); \
b = _Atomic_Load_##NAME(&t, ATOMIC_ORDER_RELAXED); \
if((r == 0) ||((r != 0) && ((a - 1) != b))){ \
printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)task_id); \
rtems_test_exit( 0 ); \
} \
_Atomic_Store_##NAME(&t, a, ATOMIC_ORDER_RELAXED); \
b = a + 1; \
r = _Atomic_Compare_exchange_##NAME(&t, &b, a, mem_bar, memory_order_relaxed); \
if(r != 0){ \
printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)task_id); \
rtems_test_exit( 0 ); \
} \
} \
printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": SUCCESS\n", (unsigned int)task_id); \
}
rtems_task Test_task(
rtems_task_argument argument
)
{
char name[5];
char *p;
rtems_status_code status;
/* Get the task name */
p = rtems_object_get_name( RTEMS_SELF, 5, name );
rtems_test_assert( p != NULL );
/* Print that the task is up and running. */
/* test relaxed barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, argument, ATOMIC_ORDER_RELAXED);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, argument, ATOMIC_ORDER_RELAXED);
/* test acquire barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, argument, ATOMIC_ORDER_ACQUIRE);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, argument, ATOMIC_ORDER_ACQUIRE);
/* test release barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, argument, ATOMIC_ORDER_RELEASE);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, argument, ATOMIC_ORDER_RELEASE);
/* Set the flag that the task is up and running */
TaskRan[argument] = true;
status = rtems_task_delete( RTEMS_SELF );
directive_failed( status, "delete" );
}
rtems_task Wait_task(
rtems_task_argument argument
)
{
char name[5];
char *p;
bool allDone;
int i;
/* Get the task name */
p = rtems_object_get_name( RTEMS_SELF, 5, name );
rtems_test_assert( p != NULL );
/* Wait on the all tasks to run */
while (1) {
allDone = true;
for ( i=0; i<TASK_NUMS ; i++ ) {
if (TaskRan[i] == false)
allDone = false;
}
if (allDone) {
puts( "\n\n*** END OF TEST spatomic07 ***\n" );
rtems_test_exit( 0 );
}
}
}
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