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#pragma once
/* This data structure holds one item, and returns you the old item when you replace it
it's sort of a "stack of 1" */
#ifdef __cplusplus
extern "C" {
#endif
typedef struct lfitem_struct_t
{
void * volatile item;
} lfitem_value_t, *lfitem_t;
void lfitem_init(lfitem_t item);
void *lfitem_get(lfitem_t item);
void *lfitem_set(lfitem_t item, const void *value);
void *lfitem_set_if_zero(lfitem_t item, void *value);
#ifdef __cplusplus
}
#endif
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