+ 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, struct timespec *t)
+{
+ struct windowsaio_data *wd = td->io_ops->data;
+ struct flist_head *entry;
+ unsigned int dequeued = 0;
+ struct io_u *io_u;
+ 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 {
+ flist_for_each(entry, &td->io_u_busylist) {
+ io_u = flist_entry(entry, struct io_u, list);
+ fov = (struct fio_overlapped*)io_u->engine_data;
+
+ if (fov->io_complete) {
+ fov->io_complete = FALSE;
+ fov->io_free = TRUE;
+ 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 > 0)
+ break;
+ }
+
+ if (dequeued >= min || (t != NULL && timeout_expired(start_count, end_count)))
+ break;
+ } while (1);
+
+ return dequeued;
+}
+
+static int fio_windowsaio_queue(struct thread_data *td,
+ struct io_u *io_u)
+{
+ LPOVERLAPPED lpOvl = NULL;
+ struct windowsaio_data *wd;
+ DWORD iobytes;
+ BOOL success;
+ int index;
+ int rc = FIO_Q_COMPLETED;
+
+ fio_ro_check(td, io_u);
+
+ wd = td->io_ops->data;
+
+ for (index = 0; index < td->o.iodepth; index++) {
+ if (wd->ovls[index].io_free) {
+ wd->ovls[index].io_free = FALSE;
+ ResetEvent(wd->ovls[index].o.hEvent);
+ break;
+ }
+ }
+
+ assert(index < td->o.iodepth);
+
+ lpOvl = &wd->ovls[index].o;
+ wd->ovls[index].io_u = io_u;
+ lpOvl->Internal = STATUS_PENDING;
+ lpOvl->InternalHigh = 0;
+ lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
+ lpOvl->OffsetHigh = io_u->offset >> 32;
+ lpOvl->Pointer = NULL;
+ io_u->engine_data = &wd->ovls[index];
+
+ switch (io_u->ddir) {
+ case DDIR_WRITE:
+ success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
+ break;
+ case DDIR_READ:
+ success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
+ break;
+ case DDIR_SYNC:
+ case DDIR_DATASYNC:
+ case DDIR_SYNC_FILE_RANGE:
+ success = FlushFileBuffers(io_u->file->hFile);
+ if (!success)
+ io_u->error = GetLastError();
+
+ return FIO_Q_COMPLETED;
+ break;
+ case DDIR_TRIM:
+ log_err("manual TRIM isn't supported on Windows");
+ io_u->error = 1;
+ io_u->resid = io_u->xfer_buflen;
+ return FIO_Q_COMPLETED;
+ break;
+ default:
+ assert(0);
+ }
+
+ if (success || GetLastError() == ERROR_IO_PENDING) {
+ rc = FIO_Q_QUEUED;
+ } else {
+ io_u->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 {
+ if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250))
+ 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 = ovl->Internal;
+ }
+
+ fov->io_complete = TRUE;
+ SetEvent(wd->iocomplete_event);
+ } while (ctx->wd->iothread_running);
+
+ CloseHandle(ctx->iocp);
+ free(ctx);