114 lines
1.8 KiB
C
114 lines
1.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdint.h>
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/* Non standard include */
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#include <commtech.h>
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#include <specific_comm.h>
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__thread struct comm *comm;
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int init_library(void)
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{
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return 0;
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}
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int finalize_library(void)
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{
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return 0;
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}
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void *create_comm_channel(void)
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{
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struct comm *comm;
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int flags;
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comm = malloc(sizeof(comm));
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if (comm != NULL)
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{
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if (!pipe(comm->pipefd))
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{
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flags = fcntl(comm->pipefd[READ_IDX], F_GETFL);
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fcntl(comm->pipefd[READ_IDX], F_SETFL, flags | O_NONBLOCK);
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return comm;
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}
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else
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free(comm);
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}
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return NULL;
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}
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int destroy_comm_channel(void *comm)
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{
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free(comm);
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return 0;
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}
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int init_producer_thread(void *comm_param)
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{
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comm = (struct comm *) comm_param;
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return 0;
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}
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int finalize_producer_thread(void *unused)
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{
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comm = NULL;
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return 0;
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}
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int init_consumer_thread(void *comm_param)
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{
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comm = (struct comm *) comm_param;
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return 0;
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}
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int finalize_consumer_thread(void *unused)
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{
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comm = NULL;
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return 0;
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}
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void *recv_one_data(void)
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{
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void *result, **res_ptr;
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int n, nb_read;
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nb_read = 0;
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res_ptr = &result;
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do
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{
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n = read(comm->pipefd[READ_IDX], res_ptr, sizeof(void *));
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if (n > 0)
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{
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nb_read += n;
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res_ptr = (void **) ((uintptr_t) res_ptr + n);
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}
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} while (nb_read < sizeof(void *));
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return result;
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}
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ssize_t recv_some_data(void **buf, size_t count)
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{
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int n, nb_read, nb_bytes;
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nb_bytes = count * sizeof(void *);
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nb_read = read(comm->pipefd[READ_IDX], buf, nb_bytes);
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if (nb_read <= 0)
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return 0;
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buf = (void **) ((uintptr_t) buf + nb_read);
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while (nb_read % sizeof(void *))
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{
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n = read(comm->pipefd[READ_IDX], buf, sizeof(void *) - (nb_read % sizeof(void *)));
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if (n > 0)
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{
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nb_read += n;
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buf = (void **) ((uintptr_t) buf + n);
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}
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}
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return nb_read / sizeof(void *);
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}
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