80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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/* Non standard include */
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#include <commtech.h>
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#include <private_common.h>
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#include <specific_comm.h>
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__thread struct comm_channel channel;
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int init_thread_comm(struct thread_comm *comm)
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{
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comm->receiver_idx = 0;
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comm->channel = &channel;
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comm->channel->state = 0;
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comm->channel->idx = 0;
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return 0;
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}
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int end_thread_comm(void)
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{
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return 0;
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}
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char *dstr="buffer transition\n";
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void _swap_buffer()
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{
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asm volatile(".globl swap_buffer\n\t"
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"swap_buffer:\n\t"
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"1:\n\t"
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"testl $1, %%gs:channel@NTPOFF + 2 *" toString(BUF_SIZE) "\n\t"
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"jnz 1b\n\t"
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"movl $1, %%gs:channel@NTPOFF + 2 *" toString(BUF_SIZE) "\n\t"
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"jmp *%%eax\n\t"
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: : "m"(dstr));
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}
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void reception(void (*on_receive)(void *))
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{
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wait_initialization();
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/* printf("Activate the consumer...\n"); */
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while (cont)
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{
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int i;
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for (i = 0; i < nb_prod; i++)
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{
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if(tcomms[i].channel->state)
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{
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int j, n;
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/*
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* cur->receiver_idx point to the last cache
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* line we have read. We go to the next cache
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* line "+ (CACHE_LINE_SIZE >> 2)" (because
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* the line is full of integer (2^2 octets)
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* and then if we are after the second cache
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* line we correct the pointer to point to
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* the first one (this is done by the modulo)
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*/
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j = tcomms[i].receiver_idx;
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n = tcomms[i].receiver_idx + (BUF_SIZE / sizeof(void *));
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tcomms[i].receiver_idx = n % ((2 * BUF_SIZE) / sizeof(void *));
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for(; j<n; j++)
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{
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/*
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* The behaviour of this is not documented but we know
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* the values inside buf won't change during this affectation
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*/
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on_receive((void *) tcomms[i].channel->buf[j]);
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}
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tcomms[i].channel->state = 0;
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}
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}
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}
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}
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