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-rw-r--r--engines/null.c164
1 files changed, 141 insertions, 23 deletions
diff --git a/engines/null.c b/engines/null.c
index 812cadfe..8a4d106b 100644
--- a/engines/null.c
+++ b/engines/null.c
@@ -6,7 +6,11 @@
*
* It also can act as external C++ engine - compiled with:
*
- * g++ -O2 -g -shared -rdynamic -fPIC -o null.so null.c -DFIO_EXTERNAL_ENGINE
+ * g++ -O2 -g -shared -rdynamic -fPIC -o cpp_null null.c -DFIO_EXTERNAL_ENGINE
+ *
+ * to test it execute:
+ *
+ * LD_LIBRARY_PATH=./engines ./fio examples/cpp_null.fio
*
*/
#include <stdio.h>
@@ -23,20 +27,17 @@ struct null_data {
int events;
};
-static struct io_u *fio_null_event(struct thread_data *td, int event)
+static struct io_u *null_event(struct null_data *nd, int event)
{
- struct null_data *nd = (struct null_data *) td->io_ops_data;
-
return nd->io_us[event];
}
-static int fio_null_getevents(struct thread_data *td, unsigned int min_events,
- unsigned int fio_unused max,
- const struct timespec fio_unused *t)
+static int null_getevents(struct null_data *nd, unsigned int min_events,
+ unsigned int fio_unused max,
+ const struct timespec fio_unused *t)
{
- struct null_data *nd = (struct null_data *) td->io_ops_data;
int ret = 0;
-
+
if (min_events) {
ret = nd->events;
nd->events = 0;
@@ -45,10 +46,8 @@ static int fio_null_getevents(struct thread_data *td, unsigned int min_events,
return ret;
}
-static int fio_null_commit(struct thread_data *td)
+static int null_commit(struct thread_data *td, struct null_data *nd)
{
- struct null_data *nd = (struct null_data *) td->io_ops_data;
-
if (!nd->events) {
#ifndef FIO_EXTERNAL_ENGINE
io_u_mark_submit(td, nd->queued);
@@ -60,10 +59,9 @@ static int fio_null_commit(struct thread_data *td)
return 0;
}
-static int fio_null_queue(struct thread_data *td, struct io_u *io_u)
+static int null_queue(struct thread_data *td, struct null_data *nd,
+ struct io_u *io_u)
{
- struct null_data *nd = (struct null_data *) td->io_ops_data;
-
fio_ro_check(td, io_u);
if (td->io_ops->flags & FIO_SYNCIO)
@@ -75,25 +73,23 @@ static int fio_null_queue(struct thread_data *td, struct io_u *io_u)
return FIO_Q_QUEUED;
}
-static int fio_null_open(struct thread_data fio_unused *td,
- struct fio_file fio_unused *f)
+static int null_open(struct null_data fio_unused *nd,
+ struct fio_file fio_unused *f)
{
return 0;
}
-static void fio_null_cleanup(struct thread_data *td)
+static void null_cleanup(struct null_data *nd)
{
- struct null_data *nd = (struct null_data *) td->io_ops_data;
-
if (nd) {
free(nd->io_us);
free(nd);
}
}
-static int fio_null_init(struct thread_data *td)
+static int null_init(struct thread_data *td, struct null_data **nd_ptr)
{
- struct null_data *nd = (struct null_data *) malloc(sizeof(*nd));
+ struct null_data *nd = (struct null_data *) malloc(sizeof(**nd_ptr));
memset(nd, 0, sizeof(*nd));
@@ -103,11 +99,49 @@ static int fio_null_init(struct thread_data *td)
} else
td->io_ops->flags |= FIO_SYNCIO;
- td->io_ops_data = nd;
+ *nd_ptr = nd;
return 0;
}
#ifndef __cplusplus
+
+static struct io_u *fio_null_event(struct thread_data *td, int event)
+{
+ return null_event((struct null_data *)td->io_ops_data, event);
+}
+
+static int fio_null_getevents(struct thread_data *td, unsigned int min_events,
+ unsigned int max, const struct timespec *t)
+{
+ struct null_data *nd = (struct null_data *)td->io_ops_data;
+ return null_getevents(nd, min_events, max, t);
+}
+
+static int fio_null_commit(struct thread_data *td)
+{
+ return null_commit(td, (struct null_data *)td->io_ops_data);
+}
+
+static int fio_null_queue(struct thread_data *td, struct io_u *io_u)
+{
+ return null_queue(td, (struct null_data *)td->io_ops_data, io_u);
+}
+
+static int fio_null_open(struct thread_data *td, struct fio_file *f)
+{
+ return null_open((struct null_data *)td->io_ops_data, f);
+}
+
+static void fio_null_cleanup(struct thread_data *td)
+{
+ null_cleanup((struct null_data *)td->io_ops_data);
+}
+
+static int fio_null_init(struct thread_data *td)
+{
+ return null_init(td, (struct null_data **)&td->io_ops_data);
+}
+
static struct ioengine_ops ioengine = {
.name = "null",
.version = FIO_IOOPS_VERSION,
@@ -134,7 +168,91 @@ static void fio_exit fio_null_unregister(void)
#else
#ifdef FIO_EXTERNAL_ENGINE
+
+struct NullData {
+ NullData(struct thread_data *td)
+ {
+ null_init(td, &impl_);
+ }
+
+ ~NullData()
+ {
+ null_cleanup(impl_);
+ }
+
+ static NullData *get(struct thread_data *td)
+ {
+ return reinterpret_cast<NullData *>(td->io_ops_data);
+ }
+
+ io_u *fio_null_event(struct thread_data *, int event)
+ {
+ return null_event(impl_, event);
+ }
+
+ int fio_null_getevents(struct thread_data *, unsigned int min_events,
+ unsigned int max, const struct timespec *t)
+ {
+ return null_getevents(impl_, min_events, max, t);
+ }
+
+ int fio_null_commit(struct thread_data *td)
+ {
+ return null_commit(td, impl_);
+ }
+
+ int fio_null_queue(struct thread_data *td, struct io_u *io_u)
+ {
+ return null_queue(td, impl_, io_u);
+ }
+
+ int fio_null_open(struct thread_data *, struct fio_file *f)
+ {
+ return null_open(impl_, f);
+ }
+
+ struct null_data *impl_;
+};
+
extern "C" {
+
+static struct io_u *fio_null_event(struct thread_data *td, int event)
+{
+ return NullData::get(td)->fio_null_event(td, event);
+}
+
+static int fio_null_getevents(struct thread_data *td, unsigned int min_events,
+ unsigned int max, const struct timespec *t)
+{
+ return NullData::get(td)->fio_null_getevents(td, min_events, max, t);
+}
+
+static int fio_null_commit(struct thread_data *td)
+{
+ return NullData::get(td)->fio_null_commit(td);
+}
+
+static int fio_null_queue(struct thread_data *td, struct io_u *io_u)
+{
+ return NullData::get(td)->fio_null_queue(td, io_u);
+}
+
+static int fio_null_open(struct thread_data *td, struct fio_file *f)
+{
+ return NullData::get(td)->fio_null_open(td, f);
+}
+
+static int fio_null_init(struct thread_data *td)
+{
+ td->io_ops_data = new NullData(td);
+ return 0;
+}
+
+static void fio_null_cleanup(struct thread_data *td)
+{
+ delete NullData::get(td);
+}
+
static struct ioengine_ops ioengine;
void get_ioengine(struct ioengine_ops **ioengine_ptr)
{