host emulation: improve udp, persistent spiffs (#5605)

tests/host/common/ArduinoMainUdp.cpp

@@ -0,0 +1,65 @@
+/*
+ Arduino emulator main loop
+ Copyright (c) 2018 david gauchard. All rights reserved.
+
+ Permission is hereby granted, free of charge, to any person obtaining a
+ copy of this software and associated documentation files (the "Software"),
+ to deal with the Software without restriction, including without limitation
+ the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ and/or sell copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following conditions:
+
+ - Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimers.
+
+ - Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimers in the
+   documentation and/or other materials provided with the distribution.
+
+ - The names of its contributors may not be used to endorse or promote
+   products derived from this Software without specific prior written
+   permission.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS WITH THE SOFTWARE.
+*/
+
+#include "lwip/opt.h"
+#include "lwip/udp.h"
+#include "lwip/inet.h"
+#include "lwip/igmp.h"
+#include "lwip/mem.h"
+#include <include/UdpContext.h>
+#include <poll.h>
+#include <map>
+
+std::map<int,UdpContext*> udps;
+
+void register_udp (int sock, UdpContext* udp)
+{
+	if (udp)
+		udps[sock] = udp;
+	else
+		udps.erase(sock);
+}
+
+void check_incoming_udp ()
+{
+	// check incoming udp
+	for (auto& udp: udps)
+	{
+		pollfd p;
+		p.fd = udp.first;
+		p.events = POLLIN;
+		if (poll(&p, 1, 0) && p.revents == POLLIN)
+		{
+			fprintf(stderr, MOCK "UDP poll(%d) -> cb\r", p.fd);
+			udp.second->mock_cb();
+		}
+	}
+}