70 lines
1.3 KiB
C
70 lines
1.3 KiB
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 * BUF_SIZE)
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#define SHARED_SPACE_VOIDPTR (SHARED_SPACE_SIZE / sizeof(void *))
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struct control
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{
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volatile int read;
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volatile int write;
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};
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struct cons
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{
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int localWrite;
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int nextRead;
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int rBatch;
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};
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struct prod
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{
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int localRead;
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int nextWrite;
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int wBatch;
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};
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struct comm
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{
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struct control ctrl __attribute__ ((aligned (CACHE_LINE_SIZE)));
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struct prod prod __attribute__ ((aligned (CACHE_LINE_SIZE)));
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struct cons cons __attribute__ ((aligned (CACHE_LINE_SIZE)));
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void * volatile *shared_space __attribute__ ((aligned (CACHE_LINE_SIZE))); // Align only to isolate cons on its cache line
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};
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__BEGIN_DECLS
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extern __thread struct comm *comm;
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extern const int batchSize;
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static inline void send(void **addr)
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{
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while (1)
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{
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int afterNextWrite = (comm->prod.nextWrite + 1) % SHARED_SPACE_VOIDPTR;
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if (afterNextWrite == comm->prod.localRead)
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{
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if (afterNextWrite == comm->ctrl.read)
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continue;
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comm->prod.localRead = comm->ctrl.read;
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}
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comm->shared_space[comm->prod.nextWrite] = addr;
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comm->prod.nextWrite = afterNextWrite;
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comm->prod.wBatch++;
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if (comm->prod.wBatch >= batchSize)
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{
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comm->ctrl.write = comm->prod.nextWrite;
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comm->prod.wBatch = 0;
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}
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break;
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}
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}
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__END_DECLS
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#endif
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