/* receive data from the application (sent to us using mywrite()).
* the call blocks until data is available.
*/
size_t stcp_app_recv(mysocket_t sd, void *dst, size_t max_len)
{
mysock_context_t *ctx = _mysock_get_context(sd);
assert(ctx && dst);
/* app may have passed in data of arbitrary length; all of it must be
* passed down to the transport layer. if it doesn't fit in the specified
* buffer, any left over is kept for the next call to app_recv().
*/
return _mysock_dequeue_buffer(ctx, &ctx->app_recv_queue,
dst, max_len, TRUE);
}
int myread(mysocket_t sd, void *buf, size_t buf_len)
{
mysock_context_t *ctx = _mysock_get_context(sd);
int len;
MYSOCK_CHECK(ctx != NULL, EBADF);
MYSOCK_CHECK(!ctx->listening, EINVAL);
assert(!ctx->close_requested);
if (ctx->eof)
return 0;
if ((len = _mysock_dequeue_buffer(ctx, &ctx->app_send_queue,
buf, buf_len, TRUE)) == 0)
{
/* make sure repeated calls to myread() return 0 on EOF */
ctx->eof = TRUE;
}
return len;
}
