+ return rc;
+}
+
+static BOOL timeout_expired(DWORD start_count, DWORD end_count)
+{
+ BOOL expired = FALSE;
+ DWORD current_time;
+
+ current_time = GetTickCount();
+
+ if ((end_count > start_count) && current_time >= end_count)
+ expired = TRUE;
+ else if (current_time < start_count && current_time > end_count)
+ expired = TRUE;
+
+ return expired;
+}
+
+static struct io_u* fio_windowsaio_event(struct thread_data *td, int event)
+{
+ struct windowsaio_data *wd = td->io_ops_data;
+ return wd->aio_events[event];
+}
+
+static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max,
+ const struct timespec *t)
+{
+ struct windowsaio_data *wd = td->io_ops_data;
+ unsigned int dequeued = 0;
+ struct io_u *io_u;
+ int i;
+ struct fio_overlapped *fov;
+ DWORD start_count = 0;
+ DWORD end_count = 0;
+ DWORD status;
+ DWORD mswait = 250;
+
+ if (t != NULL) {
+ mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
+ start_count = GetTickCount();
+ end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
+ }
+
+ do {
+ io_u_qiter(&td->io_u_all, io_u, i) {
+ if (!(io_u->flags & IO_U_F_FLIGHT))
+ continue;
+
+ fov = (struct fio_overlapped*)io_u->engine_data;
+
+ if (fov->io_complete) {
+ fov->io_complete = FALSE;
+ wd->aio_events[dequeued] = io_u;
+ dequeued++;
+ }
+
+ }
+ if (dequeued >= min)
+ break;
+
+ if (dequeued < min) {
+ status = WaitForSingleObject(wd->iocomplete_event, mswait);
+ if (status != WAIT_OBJECT_0 && dequeued >= min)
+ break;
+ }
+
+ if (dequeued >= min ||
+ (t != NULL && timeout_expired(start_count, end_count)))
+ break;
+ } while (1);
+
+ return dequeued;
+}
+
+static enum fio_q_status fio_windowsaio_queue(struct thread_data *td,
+ struct io_u *io_u)
+{
+ struct fio_overlapped *o = io_u->engine_data;
+ LPOVERLAPPED lpOvl = &o->o;
+ BOOL success = FALSE;
+ int rc = FIO_Q_COMPLETED;
+
+ fio_ro_check(td, io_u);
+
+ lpOvl->Internal = 0;
+ lpOvl->InternalHigh = 0;
+ lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
+ lpOvl->OffsetHigh = io_u->offset >> 32;
+
+ switch (io_u->ddir) {
+ case DDIR_WRITE:
+ success = WriteFile(io_u->file->hFile, io_u->xfer_buf,
+ io_u->xfer_buflen, NULL, lpOvl);
+ break;
+ case DDIR_READ:
+ success = ReadFile(io_u->file->hFile, io_u->xfer_buf,
+ io_u->xfer_buflen, NULL, lpOvl);
+ break;
+ case DDIR_SYNC:
+ case DDIR_DATASYNC:
+ case DDIR_SYNC_FILE_RANGE:
+ success = FlushFileBuffers(io_u->file->hFile);
+ if (!success) {
+ log_err("windowsaio: failed to flush file buffers\n");
+ io_u->error = win_to_posix_error(GetLastError());
+ }
+
+ return FIO_Q_COMPLETED;
+ case DDIR_TRIM:
+ log_err("windowsaio: manual TRIM isn't supported on Windows\n");
+ io_u->error = 1;
+ io_u->resid = io_u->xfer_buflen;
+ return FIO_Q_COMPLETED;
+ default:
+ assert(0);
+ break;
+ }
+
+ if (success || GetLastError() == ERROR_IO_PENDING)
+ rc = FIO_Q_QUEUED;
+ else {
+ io_u->error = win_to_posix_error(GetLastError());
+ io_u->resid = io_u->xfer_buflen;
+ }
+
+ return rc;
+}
+
+/* Runs as a thread and waits for queued IO to complete */
+static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter)
+{
+ OVERLAPPED *ovl;
+ struct fio_overlapped *fov;
+ struct io_u *io_u;
+ struct windowsaio_data *wd;
+ struct thread_ctx *ctx;
+ ULONG_PTR ulKey = 0;
+ DWORD bytes;
+
+ ctx = (struct thread_ctx*)lpParameter;
+ wd = ctx->wd;
+
+ do {
+ BOOL ret;
+
+ ret = GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey,
+ &ovl, 250);
+ if (!ret && ovl == NULL)
+ continue;
+
+ fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
+ io_u = fov->io_u;
+
+ if (ovl->Internal == ERROR_SUCCESS) {
+ io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
+ io_u->error = 0;
+ } else {
+ io_u->resid = io_u->xfer_buflen;
+ io_u->error = win_to_posix_error(GetLastError());
+ }
+
+ fov->io_complete = TRUE;
+ SetEvent(wd->iocomplete_event);
+ } while (ctx->wd->iothread_running);
+
+ CloseHandle(ctx->iocp);
+ free(ctx);
+ return 0;
+}
+
+static void fio_windowsaio_io_u_free(struct thread_data *td, struct io_u *io_u)
+{
+ struct fio_overlapped *o = io_u->engine_data;
+
+ if (o) {
+ io_u->engine_data = NULL;
+ free(o);
+ }
+}
+
+static int fio_windowsaio_io_u_init(struct thread_data *td, struct io_u *io_u)
+{
+ struct fio_overlapped *o;
+
+ o = malloc(sizeof(*o));
+ o->io_complete = FALSE;
+ o->io_u = io_u;
+ o->o.hEvent = NULL;
+ io_u->engine_data = o;