Remove parameter from rcu_read_lock()

[urcu.git] / test_urcu.c

diff --git a/test_urcu.c b/test_urcu.c
index f9b0e86c375ccdad4c71752e494810627908ba90..39408a0bdd6d7141915b66222a9d64a7f655a7c3 100644 (file)
--- a/test_urcu.c
+++ b/test_urcu.c
@@ -1,52 +1,195 @@
+/*
+ * test_urcu.c
+ *
+ * Userspace RCU library - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * Distributed under GPLv2
+ */
+
 #include <stdio.h>
 #include <pthread.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <assert.h>
+#include <sys/syscall.h>
+
+#if defined(_syscall0)
+_syscall0(pid_t, gettid)
+#elif defined(__NR_gettid)
+static inline pid_t gettid(void)
+{
+       return syscall(__NR_gettid);
+}
+#else
+#warning "use pid as tid"
+static inline pid_t gettid(void)
+{
+       return getpid();
+}
+#endif
+
 #include "urcu.h"
 
+struct test_array {
+       int a;
+};
+
+static struct test_array *test_rcu_pointer;
+
+static unsigned long duration;
+static time_t start_time;
+static unsigned long __thread duration_interval;
+#define DURATION_TEST_DELAY 100
+
+/*
+ * returns 0 if test should end.
+ */
+static int test_duration(void)
+{
+       if (duration_interval++ >= DURATION_TEST_DELAY) {
+               duration_interval = 0;
+               if (time(NULL) - start_time >= duration)
+                       return 0;
+       }
+       return 1;
+}
+
 #define NR_READ 10
-#define NR_WRITE 4
+#define NR_WRITE 9
 
+pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+void rcu_copy_mutex_lock(void)
+{
+       int ret;
+       ret = pthread_mutex_lock(&rcu_copy_mutex);
+       if (ret) {
+               perror("Error in pthread mutex lock");
+               exit(-1);
+       }
+}
+
+void rcu_copy_mutex_unlock(void)
+{
+       int ret;
+
+       ret = pthread_mutex_unlock(&rcu_copy_mutex);
+       if (ret) {
+               perror("Error in pthread mutex unlock");
+               exit(-1);
+       }
+}
 
 void *thr_reader(void *arg)
 {
-       printf("thread %s, thread id : %lu, pid %lu\n",
-                       "reader", pthread_self(), getpid());
-       sleep(2);
+       struct test_array *local_ptr;
 
-       urcu_register_thread();
+       printf("thread_begin %s, thread id : %lx, tid %lu\n",
+                       "reader", pthread_self(), (unsigned long)gettid());
 
+       urcu_register_thread();
 
+       for (;;) {
+               rcu_read_lock();
+               local_ptr = rcu_dereference(test_rcu_pointer);
+               if (local_ptr)
+                       assert(local_ptr->a == 8);
+               rcu_read_unlock();
+               if (!test_duration())
+                       break;
+       }
 
        urcu_unregister_thread();
+
+       printf("thread_end %s, thread id : %lx, tid %lu\n",
+                       "reader", pthread_self(), (unsigned long)gettid());
        return ((void*)1);
 
 }
 
 void *thr_writer(void *arg)
 {
-       int i;
-
-       printf("thread %s, thread id : %lu, pid %lu\n",
-                       "writer", pthread_self(), getpid());
-       sleep(2);
-
-       for (i = 0; i < 1000; i++) {
+       struct test_array *new, *old;
+
+       printf("thread_begin %s, thread id : %lx, tid %lu\n",
+                       "writer", pthread_self(), (unsigned long)gettid());
+
+       for (;;) {
+               new = malloc(sizeof(struct test_array));
+               rcu_copy_mutex_lock();
+               old = test_rcu_pointer;
+               if (old)
+                       assert(old->a == 8);
+               new->a = 8;
+               old = urcu_publish_content((void **)&test_rcu_pointer, new);
+               rcu_copy_mutex_unlock();
+               /* can be done after unlock */
+               if (old)
+                       old->a = 0;
+               free(old);
+               if (!test_duration())
+                       break;
+               usleep(1);
        }
 
+       printf("thread_end %s, thread id : %lx, tid %lu\n",
+                       "writer", pthread_self(), (unsigned long)gettid());
        return ((void*)2);
 }
 
-int main()
+void show_usage(int argc, char **argv)
+{
+       printf("Usage : %s duration (s)", argv[0]);
+#ifdef DEBUG_YIELD
+       printf(" [-r] [-w] (yield reader and/or writer)");
+#endif
+       printf("\n");
+}
+
+int main(int argc, char **argv)
 {
        int err;
        pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
        void *tret;
        int i;
 
+       if (argc < 2) {
+               show_usage(argc, argv);
+               return -1;
+       }
+
+       err = sscanf(argv[1], "%lu", &duration);
+       if (err != 1) {
+               show_usage(argc, argv);
+               return -1;
+       }
+
+#ifdef DEBUG_YIELD
+       for (i = 2; i < argc; i++) {
+               if (argv[i][0] != '-')
+                       continue;
+               switch (argv[i][1]) {
+               case 'r':
+                       yield_active |= YIELD_READ;
+                       break;
+               case 'w':
+                       yield_active |= YIELD_WRITE;
+                       break;
+               }
+       }
+#endif
+
+       printf("running test for %lu seconds.\n", duration);
+       start_time = time(NULL);
+       printf("thread %-6s, thread id : %lx, tid %lu\n",
+                       "main", pthread_self(), (unsigned long)gettid());
+
        for (i = 0; i < NR_READ; i++) {
                err = pthread_create(&tid_reader[i], NULL, thr_reader, NULL);
                if (err != 0)
@@ -58,9 +201,7 @@ int main()
                        exit(1);
        }
 
-       sleep(10);
-
-       for (i = 0; i < NR_WRITE; i++) {
+       for (i = 0; i < NR_READ; i++) {
                err = pthread_join(tid_reader[i], &tret);
                if (err != 0)
                        exit(1);
@@ -70,6 +211,7 @@ int main()
                if (err != 0)
                        exit(1);
        }
+       free(test_rcu_pointer);
 
        return 0;
 }