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-rw-r--r--nptl/tst-context1.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/nptl/tst-context1.c b/nptl/tst-context1.c
new file mode 100644
index 0000000..0edee00
--- /dev/null
+++ b/nptl/tst-context1.c
@@ -0,0 +1,132 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+ The GNU C 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.
+
+ The GNU C 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 the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <error.h>
+#include <limits.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+
+
+#define N 4
+
+static char stacks[N][PTHREAD_STACK_MIN];
+static ucontext_t ctx[N][2];
+static volatile int failures;
+
+
+static void
+fct (long int n)
+{
+ /* Just to use the thread local descriptor. */
+ printf ("%ld: in %s now\n", n, __FUNCTION__);
+ errno = 0;
+}
+
+
+static void *
+tf (void *arg)
+{
+ int n = (int) (long int) arg;
+
+ if (getcontext (&ctx[n][1]) != 0)
+ {
+ printf ("%d: cannot get context: %m\n", n);
+ exit (1);
+ }
+
+ printf ("%d: %s: before makecontext\n", n, __FUNCTION__);
+
+ ctx[n][1].uc_stack.ss_sp = stacks[n];
+ ctx[n][1].uc_stack.ss_size = PTHREAD_STACK_MIN;
+ ctx[n][1].uc_link = &ctx[n][0];
+ makecontext (&ctx[n][1], (void (*) (void)) fct, 1, (long int) n);
+
+ printf ("%d: %s: before swapcontext\n", n, __FUNCTION__);
+
+ if (swapcontext (&ctx[n][0], &ctx[n][1]) != 0)
+ {
+ ++failures;
+ printf ("%d: %s: swapcontext failed\n", n, __FUNCTION__);
+ }
+ else
+ printf ("%d: back in %s\n", n, __FUNCTION__);
+
+ return NULL;
+}
+
+
+static volatile int global;
+
+
+static int
+do_test (void)
+{
+ int n;
+ pthread_t th[N];
+ ucontext_t mctx;
+
+ puts ("making contexts");
+ if (getcontext (&mctx) != 0)
+ {
+ if (errno == ENOSYS)
+ {
+ puts ("context handling not supported");
+ exit (0);
+ }
+
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+
+ /* Play some tricks with this context. */
+ if (++global == 1)
+ if (setcontext (&mctx) != 0)
+ {
+ puts ("setcontext failed");
+ exit (1);
+ }
+ if (global != 2)
+ {
+ puts ("global not incremented twice");
+ exit (1);
+ }
+ puts ("global OK");
+
+ for (n = 0; n < N; ++n)
+ if (pthread_create (&th[n], NULL, tf, (void *) (long int) n) != 0)
+ {
+ puts ("create failed");
+ exit (1);
+ }
+
+ for (n = 0; n < N; ++n)
+ if (pthread_join (th[n], NULL) != 0)
+ {
+ puts ("join failed");
+ exit (1);
+ }
+
+ return failures;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"