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-rw-r--r--source3/lib/async_req.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/source3/lib/async_req.c b/source3/lib/async_req.c
deleted file mode 100644
index 011948a158..0000000000
--- a/source3/lib/async_req.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- 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"
-
-/**
- * @brief Print an async_req structure
- * @param[in] mem_ctx The memory context for the result
- * @param[in] req The request to be printed
- * @retval Text representation of req
- *
- * This is a default print function for async requests. Implementations should
- * override this with more specific information.
- *
- * This function should not be used by async API users, this is non-static
- * only to allow implementations to easily provide default information in
- * their specific functions.
- */
-
-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));
-}
-
-/**
- * @brief Create an async request
- * @param[in] mem_ctx The memory context for the result
- * @param[in] ev The event context this async request will be driven by
- * @retval A new async request
- *
- * The new async request will be initialized in state ASYNC_REQ_IN_PROGRESS
- */
-
-struct async_req *async_req_new(TALLOC_CTX *mem_ctx)
-{
- 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->print = async_req_print;
- return result;
-}
-
-/**
- * @brief An async request has successfully finished
- * @param[in] req The finished request
- *
- * async_req_done is to be used by implementors of async requests. When a
- * request is successfully finished, this function calls the user's completion
- * function.
- */
-
-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);
- }
-}
-
-/**
- * @brief An async request has seen an error
- * @param[in] req The request with an error
- * @param[in] status The error code
- *
- * async_req_done is to be used by implementors of async requests. When a
- * request can not successfully completed, the implementation should call this
- * function with the appropriate status code.
- */
-
-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);
- }
-}
-
-/**
- * @brief Timed event callback
- * @param[in] ev Event context
- * @param[in] te The timed event
- * @param[in] now zero time
- * @param[in] priv The async request to be finished
- */
-
-static void async_trigger(struct event_context *ev, struct timed_event *te,
- struct timeval now, void *priv)
-{
- struct async_req *req = talloc_get_type_abort(priv, struct async_req);
-
- TALLOC_FREE(te);
- if (NT_STATUS_IS_OK(req->status)) {
- async_req_done(req);
- }
- else {
- async_req_error(req, req->status);
- }
-}
-
-/**
- * @brief Finish a request before it started processing
- * @param[in] req The finished request
- * @param[in] status The success code
- *
- * An implementation of an async request might find that it can either finish
- * the request without waiting for an external event, or it can't even start
- * the engine. To present the illusion of a callback to the user of the API,
- * the implementation can call this helper function which triggers an
- * immediate timed event. This way the caller can use the same calling
- * conventions, independent of whether the request was actually deferred.
- */
-
-bool async_post_status(struct async_req *req, struct event_context *ev,
- NTSTATUS status)
-{
- req->status = status;
-
- if (event_add_timed(ev, req, timeval_zero(),
- async_trigger, req) == NULL) {
- return false;
- }
- return true;
-}
-
-/**
- * @brief Helper function for nomem check
- * @param[in] p The pointer to be checked
- * @param[in] req The request being processed
- *
- * Convenience helper to easily check alloc failure within a callback
- * implementing the next step of an async request.
- *
- * Call pattern would be
- * \code
- * p = talloc(mem_ctx, bla);
- * if (async_req_nomem(p, req)) {
- * return;
- * }
- * \endcode
- */
-
-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;
-}
-
-bool async_req_is_error(struct async_req *req, NTSTATUS *status)
-{
- if (req->state < ASYNC_REQ_DONE) {
- *status = NT_STATUS_INTERNAL_ERROR;
- return true;
- }
- if (req->state == ASYNC_REQ_ERROR) {
- *status = req->status;
- return true;
- }
- return false;
-}
-
-NTSTATUS async_req_simple_recv(struct async_req *req)
-{
- NTSTATUS status;
-
- if (async_req_is_error(req, &status)) {
- return status;
- }
- return NT_STATUS_OK;
-}
-
-static void async_req_timedout(struct event_context *ev,
- struct timed_event *te,
- struct timeval now,
- void *priv)
-{
- struct async_req *req = talloc_get_type_abort(
- priv, struct async_req);
- TALLOC_FREE(te);
- async_req_error(req, NT_STATUS_IO_TIMEOUT);
-}
-
-bool async_req_set_timeout(struct async_req *req, struct event_context *ev,
- struct timeval to)
-{
- return (event_add_timed(ev, req,
- timeval_current_ofs(to.tv_sec, to.tv_usec),
- async_req_timedout, req)
- != NULL);
-}
-
-struct async_req *async_wait_send(TALLOC_CTX *mem_ctx,
- struct event_context *ev,
- struct timeval to)
-{
- struct async_req *result;
-
- result = async_req_new(mem_ctx);
- if (result == NULL) {
- return result;
- }
- if (!async_req_set_timeout(result, ev, to)) {
- TALLOC_FREE(result);
- return NULL;
- }
- return result;
-}
-
-NTSTATUS async_wait_recv(struct async_req *req)
-{
- return NT_STATUS_OK;
-}
-
-struct async_queue_entry {
- struct async_queue_entry *prev, *next;
- struct async_req_queue *queue;
- struct async_req *req;
- void (*trigger)(struct async_req *req);
-};
-
-struct async_req_queue {
- struct async_queue_entry *queue;
-};
-
-struct async_req_queue *async_req_queue_init(TALLOC_CTX *mem_ctx)
-{
- return TALLOC_ZERO_P(mem_ctx, struct async_req_queue);
-}
-
-static int async_queue_entry_destructor(struct async_queue_entry *e)
-{
- struct async_req_queue *queue = e->queue;
-
- DLIST_REMOVE(queue->queue, e);
-
- if (queue->queue != NULL) {
- queue->queue->trigger(queue->queue->req);
- }
-
- return 0;
-}
-
-static void async_req_immediate_trigger(struct event_context *ev,
- struct timed_event *te,
- struct timeval now,
- void *priv)
-{
- struct async_queue_entry *e = talloc_get_type_abort(
- priv, struct async_queue_entry);
-
- TALLOC_FREE(te);
- e->trigger(e->req);
-}
-
-bool async_req_enqueue(struct async_req_queue *queue, struct event_context *ev,
- struct async_req *req,
- void (*trigger)(struct async_req *req))
-{
- struct async_queue_entry *e;
- bool busy;
-
- busy = (queue->queue != NULL);
-
- e = talloc(req, struct async_queue_entry);
- if (e == NULL) {
- return false;
- }
-
- e->req = req;
- e->trigger = trigger;
- e->queue = queue;
-
- DLIST_ADD_END(queue->queue, e, struct async_queue_entry *);
- talloc_set_destructor(e, async_queue_entry_destructor);
-
- if (!busy) {
- struct timed_event *te;
-
- te = event_add_timed(ev, e, timeval_zero(),
- async_req_immediate_trigger,
- e);
- if (te == NULL) {
- TALLOC_FREE(e);
- return false;
- }
- }
-
- return true;
-}
-
-bool _async_req_setup(TALLOC_CTX *mem_ctx, struct async_req **preq,
- void *pstate, size_t state_size, const char *typename)
-{
- struct async_req *req;
- void **ppstate = (void **)pstate;
- void *state;
-
- req = async_req_new(mem_ctx);
- if (req == NULL) {
- return false;
- }
- state = talloc_size(req, state_size);
- if (state == NULL) {
- TALLOC_FREE(req);
- return false;
- }
- talloc_set_name(state, typename);
- req->private_data = state;
-
- *preq = req;
- *ppstate = state;
-
- return true;
-}