PATCH: kernel / errno testing

[Marcus Meissner]

Hi,

glibc 2.3.current CVS is throwing a huge stone in our direction,
it no longer allows overload of __errno_location.

To visualize this problem I have added this testcase.

I will try to find a way to make our errno handling work again :/

linux only.

Ciao, Marcus

Changelog:
	Added testcase for multithread safe errno.

Index: dlls/kernel/tests/Makefile.in
===================================================================
RCS file: /home/wine/wine/dlls/kernel/tests/Makefile.in,v
retrieving revision 1.6
diff -u -r1.6 Makefile.in
--- dlls/kernel/tests/Makefile.in	4 Oct 2002 17:42:27 -0000	1.6
+++ dlls/kernel/tests/Makefile.in	22 Jan 2003 09:34:15 -0000
@@ -12,6 +12,7 @@
 	directory.c \
 	drive.c \
 	environ.c \
+	errno.c \
 	file.c \
 	format_msg.c \
 	generated.c \
-------------- next part --------------
/*
 * Errno testing.
 *
 * Copyright 2003 Marcus Meissner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <wine/test.h>
#include <windef.h>
#include <winbase.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>

/*
 * This test is just to check that errno is thread safe.
 * We cannot use config.h, so *BSD and other platforms will want
 * to add other ifdefs.
 */
#if defined(linux)

#include <sched.h>

void WINAPI errnotest1(void *x) {
	struct stat stbuf;
	int cnt = 100;
	while (cnt--) {
		if (-1!=lstat("/not/existant/file",&stbuf))
			return;
		sched_yield(); /* will not change errno */
		if (errno != ENOENT) {
			ok(errno==ENOENT,"errno did not stay at ENOENT for non existing file, changed to %d\n", errno);
			return;
		}
	}
	ok(1==1,"Errno stayed the same over the whole run.\n");
}

void WINAPI errnotest2(void *x) {
	int cnt = 100;
	close(333);
	while (cnt--) {
		close(333);
		sched_yield(); /* will not change errno */
		if (errno != EBADF) {
			ok(errno==EBADF,"errno did not stay at EBADF for close of bad fd, changed to %d\n", errno);
			return;
		}
	}
	ok(1==1,"Errno stayed the same over the whole run.\n");
}

START_TEST(errno)
{
	DWORD threadId;
	HANDLE	ht[2];

	ht[0]=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)errnotest1,NULL,0,&threadId);
	ht[1]=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)errnotest2,NULL,0,&threadId);
	WaitForMultipleObjects(2,ht,TRUE,INFINITE);
}
#else
START_TEST(errno)
{
	/* nothing */
}
#endif