73 lines
1.7 KiB
C
73 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 <common_comm.h>
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#include <specific_comm.h>
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__thread struct communication_channel channel;
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struct communication_assoc *create_comm_assoc(void)
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{
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struct communication_assoc *assoc;
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assoc = (struct communication_assoc *) malloc(sizeof(struct communication_assoc));
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assoc->tid = pthread_self();
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assoc->receiver_idx = 0;
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assoc->channel = &channel;
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return assoc;
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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)(uintptr_t))
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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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struct communication_assoc *cur;
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discover_new_producers();
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cur = assoc_root.next;
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while(cur != &assoc_root)
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{
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struct communication_channel *channel = cur->channel;
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if(channel->state)
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{
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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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int i = cur->receiver_idx;
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int n = cur->receiver_idx + (BUF_SIZE / sizeof(uintptr_t));
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cur->receiver_idx = n % ((2 * BUF_SIZE) / sizeof(uintptr_t));
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for(; i<n; i++)
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on_receive(channel->buf[i]);
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channel->state = 0;
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}
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cur = cur->next;
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}
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}
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}
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