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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, cpuid, 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, mem_bar); \
b = a + 1; \
r = _Atomic_Compare_exchange_##NAME(&t, &b, a - 1, mem_bar, memory_order_relaxed);\
if(r != 0){ \
locked_printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)cpuid); \
rtems_test_exit( 0 ); \
} \
_Atomic_Store_##NAME(&t, a, mem_bar); \
r = _Atomic_Compare_exchange_##NAME(&t, &a, a - 1, mem_bar, memory_order_relaxed);\
b = _Atomic_Load_##NAME(&t, mem_bar); \
if((r == 0) ||((r != 0) && ((a - 1) != b))){ \
locked_printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)cpuid); \
rtems_test_exit( 0 ); \
} \
_Atomic_Store_##NAME(&t, a, mem_bar); \
b = a + 1; \
r = _Atomic_Compare_exchange_##NAME(&t, &b, a, mem_bar, memory_order_relaxed); \
if(r != 0){ \
locked_printf("\ntask%d: Atomic_Compare_exchange_" #NAME ": FAILED\n", (unsigned int)cpuid); \
rtems_test_exit( 0 ); \
} \
} \
locked_printf("\nCPU%d Atomic_Compare_exchange_" #NAME ": SUCCESS\n", cpuid); \
}
rtems_task Test_task(
rtems_task_argument argument
)
{
int cpu_num;
char name[5];
char *p;
/* Get the task name */
p = rtems_object_get_name( RTEMS_SELF, 5, name );
rtems_test_assert( p != NULL );
/* Get the CPU Number */
cpu_num = bsp_smp_processor_id();
/* Print that the task is up and running. */
/* test relaxed barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, cpu_num, ATOMIC_ORDER_RELAXED);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, cpu_num, ATOMIC_ORDER_RELAXED);
/* test acquire barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, cpu_num, ATOMIC_ORDER_ACQUIRE);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, cpu_num, ATOMIC_ORDER_ACQUIRE);
/* test release barrier */
ATOMIC_CAS_NO_BARRIER(uint, Uint, uint_fast32_t, cpu_num, ATOMIC_ORDER_RELEASE);
ATOMIC_CAS_NO_BARRIER(ptr, Pointer, uintptr_t, cpu_num, ATOMIC_ORDER_RELEASE);
// ATOMIC_CAS_NO_BARRIER(64, cpu_num);
/* Set the flag that the task is up and running */
TaskRan[cpu_num] = true;
/* Drop into a loop which will keep this task on
* running on the cpu.
*/
while(1);
}
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