Add basic infrastructure for general async requests

(This used to be commit 9f8b2a87ee8bba930b776dcfda608a5639f6d55a)

1 files changed, 68 insertions, 0 deletions

diff --git a/source3/lib/async_req.c b/source3/lib/async_req.c
new file mode 100644
index 0000000000..01154ca436
--- /dev/null
+++ b/source3/lib/async_req.c
@@ -0,0 +1,68 @@
+/*
+   Unix SMB/CIFS implementation.
+   Infrastructure for async requests
+   Copyright (C) Volker Lendecke 2008
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+char *async_req_print(TALLOC_CTX *mem_ctx, struct async_req *req)
+{
+	return talloc_asprintf(mem_ctx, "async_req: state=%d, status=%s, "
+			       "priv=%s", req->state, nt_errstr(req->status),
+			       talloc_get_name(req->private_data));
+}
+
+struct async_req *async_req_new(TALLOC_CTX *mem_ctx, struct event_context *ev)
+{
+	struct async_req *result;
+
+	result = TALLOC_ZERO_P(mem_ctx, struct async_req);
+	if (result == NULL) {
+		return NULL;
+	}
+	result->state = ASYNC_REQ_IN_PROGRESS;
+	result->event_ctx = ev;
+	result->print = async_req_print;
+	return result;
+}
+
+void async_req_done(struct async_req *req)
+{
+	req->status = NT_STATUS_OK;
+	req->state = ASYNC_REQ_DONE;
+	if (req->async.fn != NULL) {
+		req->async.fn(req);
+	}
+}
+
+void async_req_error(struct async_req *req, NTSTATUS status)
+{
+	req->status = status;
+	req->state = ASYNC_REQ_ERROR;
+	if (req->async.fn != NULL) {
+		req->async.fn(req);
+	}
+}
+
+bool async_req_nomem(const void *p, struct async_req *req)
+{
+	if (p != NULL) {
+		return false;
+	}
+	async_req_error(req, NT_STATUS_NO_MEMORY);
+	return true;
+}