Rename CPACK to Cmake.

[simgrid.git] / buildtools / Cmake / prog_test / prog_AC_CHECK_MCSC.c

diff --git a/buildtools/Cmake/prog_test/prog_AC_CHECK_MCSC.c b/buildtools/Cmake/prog_test/prog_AC_CHECK_MCSC.c
new file mode 100644 (file)
index 0000000..4cd27ed
--- /dev/null
+++ b/buildtools/Cmake/prog_test/prog_AC_CHECK_MCSC.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+
+void child(void);
+
+ucontext_t uc_child;
+ucontext_t uc_main;
+
+
+
+void child(void)
+{
+    if (swapcontext(&uc_child, &uc_main) != 0)
+        exit(2);
+}
+
+int main(int argc, char *argv[])
+{
+    FILE *fp;
+    void *stack;
+
+    /* the default is that it fails */
+    if ((fp = fopen("conftestval", "w")) == NULL)
+        exit(3);
+    fprintf(fp, "no\n");
+    fclose(fp);
+
+    /* configure a child user-space context */
+    if ((stack = malloc(64*1024)) == NULL)
+        exit(4);
+    if (getcontext(&uc_child) != 0)
+        exit(5);
+    uc_child.uc_link = NULL;
+    uc_child.uc_stack.ss_sp = (char *)stack+(32*1024);
+    uc_child.uc_stack.ss_size = 32*1024;
+    uc_child.uc_stack.ss_flags = 0;
+    makecontext(&uc_child, child, 0);
+
+    /* switch into the user context */
+    if (swapcontext(&uc_main, &uc_child) != 0)
+        exit(6);
+
+    /* Fine, child came home */
+    if ((fp = fopen("conftestval", "w")) == NULL)
+        exit(7);
+    fprintf(fp, "yes\n");
+    fclose(fp);
+
+    /* die successfully */
+    exit(0);
+       return 1;
+}