xref: /haiku/src/tests/system/kernel/port_wakeup_test_3.cpp (revision c8b86e7067b56da2e6192cede4ae629fa39cefad)

/*
 * Copyright 2006, Marcus Overhagen, <marcus@overhagen.de>
 * Distributed under the terms of the MIT License.
 */


#include <OS.h>
#include <stdio.h>
#include <string.h>


/*
 *
 */

port_id id;
char data[100];

int32
test_thread(void *)
{
	ssize_t size;

	// BeBook: does block when port is empty, and unblocks when port is written to or deleted
	printf("port_buffer_size...\n");
	size = port_buffer_size(id);
	printf("port_buffer_size size %ld (0x%08lx) (%s)\n", size, size, strerror(size));

	return 0;
}


int
main()
{
	status_t s;
	ssize_t size;
	int32 code;

	id = create_port(1, "test port");
	printf("created port %ld\n", id);

	s = write_port(id, 0x1234, data, 10);
	printf("write port result 0x%08lx (%s)\n", s, strerror(s));

	size = read_port(id, &code, data, sizeof(data));
	printf("read port code %lx, size %ld (0x%08lx) (%s)\n", code, size, size, strerror(size));

	printf("port_buffer_size should block for 5 seconds now, as port is empty\n");

	thread_id thread = spawn_thread(test_thread, "test thread", B_NORMAL_PRIORITY, NULL);
	resume_thread(thread);
	snooze(5000000);

	printf("write port...\n");
	s = write_port(id, 0x5678, data, 20);
	printf("write port result 0x%08lx (%s)\n", s, strerror(s));

	printf("waiting for thread to terminate\n");
	wait_for_thread(thread, &s);

	return 0;
}