1 files changed, 102 insertions, 0 deletions

diff --git a/wait_test.c b/wait_test.c
new file mode 100644
index 0000000..0ac6a4f
--- /dev/null
+++ b/wait_test.c
@@ -0,0 +1,102 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "litmus.h"
+
+#define US_PER_MS 1000
+
+#define NUMTASKS 4
+
+int  prefix(void) 
+{
+        char field[1024];
+        int prefix[1024];
+        int i, sum = 0;
+
+        for (i = 0; i < 1024; i++) {
+                sum += field[i];
+                prefix[i] = sum;
+        }
+        return sum;
+}
+
+
+void do_stuff(void)
+{
+        int i =0, j =0;
+
+        for (; i < 50000; i++)
+                j += prefix();
+}
+
+#define CALL(sc) do { ret = sc; if (ret == -1) {perror(" (!!) " #sc " failed: "); /*exit(1)*/;}} while (0);
+
+unsigned int job_no;
+
+
+void next(void)
+{
+        int ret;
+        unsigned int actual;
+        CALL(get_job_no(&actual));
+        CALL(wait_for_job_release(++job_no));
+        printf("Now executing job %u, waited for %u\n", actual, job_no);
+}
+
+void sync_jobs(void)
+{
+        int ret;
+        unsigned int actual;
+        CALL(get_job_no(&actual));
+        job_no = actual;
+}
+
+
+int main(int argc, char** argv) 
+{
+        int ret;
+        
+
+        CALL(getpid());
+        printf("my pid is %d\n", ret);
+
+
+        CALL(get_job_no(&job_no));
+        printf("my job_no is %u", job_no);
+
+        next();
+        next();
+        next();
+        
+        /* now overrun a job for good */
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+        do_stuff();
+
+
+        next();
+        next();
+        next();
+        next();
+        sync_jobs();
+        next();
+        next();
+        next();
+
+
+        return 0;       
+}