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Changeset 6601f9b in mainline


Ignore:
Timestamp:
2014-10-09T15:46:34Z (7 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master
Children:
ad05baf
Parents:
e8f3637
Message:

Provide a dummy implementation of sparc32 atomic_compare_exchange_4().

File:
1 edited

Legend:

Unmodified
Added
Removed
  • kernel/arch/sparc32/src/sparc32.c

    re8f3637 r6601f9b  
    3737#include <arch/interrupt.h>
    3838#include <arch/asm.h>
     39#include <arch/barrier.h>
    3940#include <arch/machine_func.h>
    4041#include <func.h>
     
    169170}
    170171
     172bool __atomic_compare_exchange_4(uint32_t *ptr, uint32_t *expected,
     173    uint32_t desired, bool weak, int success_mm, int failure_mm)
     174{
     175        ipl_t ipl;
     176        bool success;
     177
     178        /* XXX: This is a rather dummy implementation. */
     179
     180        ipl = interrupts_disable();
     181        memory_barrier();
     182        if (*ptr == *expected) {
     183                success = true;
     184                *ptr = desired;
     185        } else {
     186                success = false;
     187                *expected = *ptr;
     188        }
     189        memory_barrier();
     190        interrupts_restore(ipl);
     191
     192        return success;
     193}
     194
    171195/** @}
    172196 */
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