C++ (Cpp) release_shared_space Examples

Example #1

File: fable_shmem_pipe.cpp Project: jacklicn/Phoenix---MP

// Return 1 for success, 0 for remote closed, -1 for error including EAGAIN
int wait_for_returned_buffers(struct shmem_pipe_handle_conn *sp)
{
	int r;
	int s;
	static int total_read;

	s = read(sp->base.fd, sp->rx_buf + sp->rx_buf_prod, sizeof(sp->rx_buf) - sp->rx_buf_prod);
	if (s <= 0) {
	  if(errno == ECONNRESET)
	    errno = 0;
	  return s;
	}
	total_read += s;
	sp->rx_buf_prod += s;
	for (r = 0; r < sp->rx_buf_prod / sizeof(struct extent); r++) {
		struct extent *e = &((struct extent *)sp->rx_buf)[r];
		release_shared_space(sp, e->base, e->size);
	}
	if (sp->rx_buf_prod != r * sizeof(struct extent))
		memmove(sp->rx_buf,
			sp->rx_buf + sp->rx_buf_prod - (sp->rx_buf_prod % sizeof(struct extent)),
			sp->rx_buf_prod % sizeof(struct extent));
	sp->rx_buf_prod %= sizeof(struct extent);
	return 1;
}

Example #2

File: shmem_pipe_thr.c Project: jopu-enea/ipc-bench

static void
wait_for_returned_buffers(struct shmem_pipe *sp)
{
	int r;
	int s;
	static int total_read;

	s = read(sp->child_to_parent_read, sp->rx_buf + sp->rx_buf_prod, sizeof(sp->rx_buf) - sp->rx_buf_prod);
	if (s < 0)
		err(1, "error reading in parent");
	total_read += s;
	sp->rx_buf_prod += s;
	for (r = 0; r < sp->rx_buf_prod / sizeof(struct extent); r++) {
		struct extent *e = &((struct extent *)sp->rx_buf)[r];
		release_shared_space(sp, e->base, e->size);
	}
	if (sp->rx_buf_prod != r * sizeof(struct extent))
		memmove(sp->rx_buf,
			sp->rx_buf + sp->rx_buf_prod - (sp->rx_buf_prod % sizeof(struct extent)),
			sp->rx_buf_prod % sizeof(struct extent));
	sp->rx_buf_prod %= sizeof(struct extent);
}