kc3-lang/libevent/test/regress_et.c

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• Hash : 2e3f0f68
  Author :
  Date : 2009-02-01T02:20:16
  

  Enable the edge-triggered test again
  
  svn:r1092
  

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• test/regress_et.c

• 
  #include <event-config.h>
  
  #ifdef WIN32
  #include <winsock2.h>
  #endif
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <sys/time.h>
  #ifdef _EVENT_HAVE_SYS_SOCKET_H
  #include <sys/socket.h>
  #endif
  #include <fcntl.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  #include <errno.h>
  
  #include <event2/event.h>
  #include <event2/util.h>
  
  #include "regress.h"
  
  static int was_et = 0;
  
  static void
  read_cb(int fd, short event, void *arg)
  {
  	char buf;
  	int len;
  
  	len = read(fd, &buf, sizeof(buf));
  
  	/*printf("%s: %s %d%s\n", __func__, event & EV_ET ? "etread" : "read",
  	         len, len ? "" : " - means EOF");
  	*/
  
  	called++;
  	if (event & EV_ET)
  		was_et = 1;
  
  	if (!len)
  		event_del(arg);
  }
  
  #ifndef SHUT_WR
  #define SHUT_WR 1
  #endif
  
  #ifdef WIN32
  #define LOCAL_SOCKETPAIR_AF AF_INET
  #else
  #define LOCAL_SOCKETPAIR_AF AF_UNIX
  #endif
  
  static void
  test_edgetriggered(void *et)
  {
  	struct event *ev = NULL;
      struct event_base *base = NULL;
  	const char *test = "test string";
  	evutil_socket_t pair[2] = {-1,-1};
      int supports_et;
  	int success;
  
  	if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, pair) == -1) {
  		tt_fail_perror("socketpair");
  	}
  
  	called = was_et = 0;
  
  	write(pair[0], test, strlen(test)+1);
  	shutdown(pair[0], SHUT_WR);
  
  	/* Initalize the event library */
  	base = event_base_new();
  
  	if (!strcmp(event_base_get_method(base), "epoll") ||
  		!strcmp(event_base_get_method(base), "kqueue"))
  		supports_et = 1;
  	else
  		supports_et = 0;
  
  	TT_BLATHER(("Checking for edge-triggered events with %s, which should %s"
  				"support edge-triggering", event_base_get_method(base),
  				supports_et?"":"not "));
  
  	/* Initalize one event */
      ev = event_new(base, pair[1], EV_READ|EV_ET|EV_PERSIST, read_cb, &ev);
  
  	event_add(ev, NULL);
  
  	/* We're going to call the dispatch function twice.  The first invocation
  	 * will read a single byte from pair[1] in either case.  If we're edge
  	 * triggered, we'll only see the event once (since we only see transitions
  	 * from no data to data), so the second invocation of event_base_loop will
  	 * do nothing.  If we're level triggered, the second invocation of
  	 * event_base_loop will also activate the event (because there's still
  	 * data to read). */
  	event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);
  	event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);
  
  	if (supports_et) {
  		tt_int_op(called, ==, 1);
  		tt_assert(was_et);
  	} else {
  		tt_int_op(called, ==, 2);
  		tt_assert(!was_et);
  		success = (called == 2) && !was_et;
  
  	}
  
   end:
  	if (ev) {
  		event_del(ev);
  		event_free(ev);
  	}
  	if (base)
  		event_base_free(base);
  	EVUTIL_CLOSESOCKET(pair[0]);
  	EVUTIL_CLOSESOCKET(pair[1]);
  }
  
  struct testcase_t edgetriggered_testcases[] = {
  	{ "et", test_edgetriggered, TT_FORK, NULL, NULL },
  	END_OF_TESTCASES
  };
  

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