lib/ultralib/src/os/atomic.c


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#include "PR/os_internal.h"

int __osAtomicDec(unsigned int* p) {
    u32 mask;
    int result;

    mask = __osDisableInt();
    if (*p) {
        (*p)--;
        result = 1;
    } else {
        result = 0;
    }
    __osRestoreInt(mask);
    return result;
}