static int do_write(connection *c) { pa_memchunk chunk; ssize_t r; void *p; connection_assert_ref(c); if (!c->source_output) return 0; if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0) { /* pa_log("peek failed"); */ return 0; } pa_assert(chunk.memblock); pa_assert(chunk.length); p = pa_memblock_acquire(chunk.memblock); r = pa_iochannel_write(c->io, (uint8_t*) p+chunk.index, chunk.length); pa_memblock_release(chunk.memblock); pa_memblock_unref(chunk.memblock); if (r < 0) { pa_log("write(): %s", pa_cstrerror(errno)); return -1; } pa_memblockq_drop(c->output_memblockq, (size_t) r); return 1; }
static int do_write(struct userdata *u) { ssize_t r; pa_assert(u); if (!pa_iochannel_is_writable(u->io)) return 0; if (u->write_data) { pa_assert(u->write_index < u->write_length); if ((r = pa_iochannel_write(u->io, (uint8_t*) u->write_data + u->write_index, u->write_length - u->write_index)) <= 0) { pa_log("write() failed: %s", pa_cstrerror(errno)); return -1; } u->write_index += (size_t) r; pa_assert(u->write_index <= u->write_length); if (u->write_index == u->write_length) { pa_xfree(u->write_data); u->write_data = NULL; u->write_index = u->write_length = 0; } } if (!u->write_data && u->state == STATE_PREPARE) { int so_sndbuf = 0; socklen_t sl = sizeof(int); /* OK, we're done with sending all control data we need to, so * let's hand the socket over to the IO thread now */ pa_assert(u->fd < 0); u->fd = pa_iochannel_get_send_fd(u->io); pa_iochannel_set_noclose(u->io, TRUE); pa_iochannel_free(u->io); u->io = NULL; pa_make_tcp_socket_low_delay(u->fd); if (getsockopt(u->fd, SOL_SOCKET, SO_SNDBUF, &so_sndbuf, &sl) < 0) pa_log_warn("getsockopt(SO_SNDBUF) failed: %s", pa_cstrerror(errno)); else { pa_log_debug("SO_SNDBUF is %zu.", (size_t) so_sndbuf); pa_sink_set_max_request(u->sink, PA_MAX((size_t) so_sndbuf, u->block_size)); } pa_log_debug("Connection authenticated, handing fd to IO thread..."); pa_asyncmsgq_post(u->thread_mq.inq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_PASS_SOCKET, NULL, 0, NULL, NULL); u->state = STATE_RUNNING; } return 0; }