39 lines
864 B
C
39 lines
864 B
C
#ifndef _SPECIFIC_COMM_H_
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#define _SPECIFIC_COMM_H_ 1
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/* Non standard include */
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#include <commtech.h>
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#define SHARED_SPACE_SIZE (2 * CACHE_LINE_SIZE)
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#define SHARED_SPACE_VOIDPTR (SHARED_SPACE_SIZE / sizeof(void *))
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struct channel
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{
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void * volatile *shared_space;
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volatile int cons_idx __attribute__ ((aligned (CACHE_LINE_SIZE)));
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volatile int prod_idx __attribute__ ((aligned (CACHE_LINE_SIZE)));
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};
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__BEGIN_DECLS
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static inline void send(struct channel *channel, void **addr)
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{
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static __thread int local_cons_idx = 0;
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int local_prod, next_prod;
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local_prod = channel->prod_idx;
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next_prod = (local_prod + 1) % SHARED_SPACE_VOIDPTR;
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if (next_prod == local_cons_idx)
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{
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while (next_prod == channel->cons_idx);
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local_cons_idx = channel->cons_idx;
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}
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channel->shared_space[local_prod] = addr;
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channel->prod_idx = next_prod;
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}
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__END_DECLS
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#endif
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