static struct iovec*
get_write_buffer(test_data* td, int message_size, int* n_vecs)
{
struct shmem_pipe *sp = td->data;
unsigned long offset;
while ((offset = alloc_shared_space(sp, message_size)) == ALLOC_FAILED)
wait_for_returned_buffers(sp);
sp->iov.iov_base = sp->ring + offset;
sp->iov.iov_len = message_size;
*n_vecs = 1;
return &sp->iov;
}
struct fable_buf* fable_get_write_buf_shmem_pipe(void* handle, unsigned len)
{
struct shmem_pipe_handle_conn *sp = (struct shmem_pipe_handle_conn*)handle;
unsigned long offset;
unsigned allocated_len = len;
while ((offset = alloc_shared_space(sp, &allocated_len)) == ALLOC_FAILED) {
int wait_ret = wait_for_returned_buffers(sp);
if(wait_ret == 0)
errno = 0;
if(wait_ret <= 0)
return 0;
}
struct shmem_pipe_buf* buf = (struct shmem_pipe_buf*)malloc(sizeof(struct shmem_pipe_buf));
buf->iov.iov_base = ((char*)sp->ring) + offset;
buf->iov.iov_len = allocated_len;
buf->base.bufs = &buf->iov;
buf->base.nbufs = 1;
return &buf->base;
}