+/*
+ * 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;
+ int b;
+ char c[200];
+};
+
+static struct test_array *test_rcu_pointer;
+
+#define NR_READ 10
+#define NR_WRITE 9
+
+
+void *thr_reader(void *arg)
+{
+ int qparity, i, j;
+ struct test_array *local_ptr;
+
+ printf("thread %s, thread id : %lx, tid %lu\n",
+ "reader", pthread_self(), (unsigned long)gettid());
+ sleep(2);
+
+ urcu_register_thread();
+
+ for (i = 0; i < 100000; i++) {
+ for (j = 0; j < 100000000; j++) {
+ qparity = rcu_read_lock();
+ local_ptr = rcu_dereference(test_rcu_pointer);
+ if (local_ptr) {
+ assert(local_ptr->a == 8);
+ assert(local_ptr->b == 12);
+ assert(local_ptr->c[55] == 2);
+ }
+ rcu_read_unlock(qparity);
+ }
+ }
+
+ urcu_unregister_thread();
+
+ return ((void*)1);
+
+}
+
+void *thr_writer(void *arg)
+{
+ int i;
+ struct test_array *new, *old;
+
+ printf("thread %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+ sleep(2);
+
+ for (i = 0; i < 10000000; i++) {
+ new = malloc(sizeof(struct test_array));
+ rcu_write_lock();
+ old = test_rcu_pointer;
+ if (old) {
+ assert(old->a == 8);
+ assert(old->b == 12);
+ assert(old->c[55] == 2);
+ }
+ new->c[55] = 2;
+ new->b = 12;
+ new->a = 8;
+ old = urcu_publish_content((void **)&test_rcu_pointer, new);
+ rcu_write_unlock();
+ /* can be done after unlock */
+ if (old) {
+ old->a = 0;
+ old->b = 0;
+ old->c[55] = 0;
+ }
+ free(old);
+ usleep(1);
+ }
+
+ return ((void*)2);
+}
int main()
{
+ int err;
+ pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
+ void *tret;
+ int i;
+
+ 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)
+ exit(1);
+ }
+ for (i = 0; i < NR_WRITE; i++) {
+ err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL);
+ if (err != 0)
+ exit(1);
+ }
+
+ sleep(10);
+ for (i = 0; i < NR_WRITE; i++) {
+ err = pthread_join(tid_reader[i], &tret);
+ if (err != 0)
+ exit(1);
+ }
+ for (i = 0; i < NR_WRITE; i++) {
+ err = pthread_join(tid_writer[i], &tret);
+ if (err != 0)
+ exit(1);
+ }
+ return 0;
}