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authorStefan Metzmacher <metze@samba.org>2009-04-03 18:18:51 +0200
committerStefan Metzmacher <metze@samba.org>2009-05-01 17:42:00 +0200
commiteb723c2061ece9652638866b5336f3f377339c8f (patch)
tree793eab40c411f94876d8c59857989577a50271b3 /lib
parenta0830f4cb93997e235acb95e1bdb438626601974 (diff)
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tsocket: add tstream_writev_queue_send/recv()
metze
Diffstat (limited to 'lib')
-rw-r--r--lib/tsocket/tsocket.h8
-rw-r--r--lib/tsocket/tsocket_helpers.c124
2 files changed, 132 insertions, 0 deletions
diff --git a/lib/tsocket/tsocket.h b/lib/tsocket/tsocket.h
index aef73ae8c5..ed56995572 100644
--- a/lib/tsocket/tsocket.h
+++ b/lib/tsocket/tsocket.h
@@ -214,5 +214,13 @@ struct tevent_req *tstream_readv_pdu_send(TALLOC_CTX *mem_ctx,
void *next_vector_private);
int tstream_readv_pdu_recv(struct tevent_req *req, int *perrno);
+struct tevent_req *tstream_writev_queue_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tstream_context *stream,
+ struct tevent_queue *queue,
+ const struct iovec *vector,
+ size_t count);
+int tstream_writev_queue_recv(struct tevent_req *req, int *perrno);
+
#endif /* _TSOCKET_H */
diff --git a/lib/tsocket/tsocket_helpers.c b/lib/tsocket/tsocket_helpers.c
index 1b9a9bf670..99cb25b396 100644
--- a/lib/tsocket/tsocket_helpers.c
+++ b/lib/tsocket/tsocket_helpers.c
@@ -320,3 +320,127 @@ int tstream_readv_pdu_recv(struct tevent_req *req, int *perrno)
return ret;
}
+struct tstream_writev_queue_state {
+ /* this structs are owned by the caller */
+ struct {
+ struct tevent_context *ev;
+ struct tstream_context *stream;
+ const struct iovec *vector;
+ size_t count;
+ } caller;
+ int ret;
+};
+
+static void tstream_writev_queue_trigger(struct tevent_req *req,
+ void *private_data);
+static void tstream_writev_queue_done(struct tevent_req *subreq);
+
+/**
+ * @brief Queue a dgram blob for sending through the socket
+ * @param[in] mem_ctx The memory context for the result
+ * @param[in] ev The tevent_context to run on
+ * @param[in] stream The stream to send data through
+ * @param[in] queue The existing send queue
+ * @param[in] vector The iovec vector so write
+ * @param[in] count The size of the vector
+ * @retval The async request handle
+ *
+ * This function queues a blob for sending to destination through an existing
+ * dgram socket. The async callback is triggered when the whole blob is
+ * delivered to the underlying system socket.
+ *
+ * The caller needs to make sure that all non-scalar input parameters hang
+ * arround for the whole lifetime of the request.
+ */
+struct tevent_req *tstream_writev_queue_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tstream_context *stream,
+ struct tevent_queue *queue,
+ const struct iovec *vector,
+ size_t count)
+{
+ struct tevent_req *req;
+ struct tstream_writev_queue_state *state;
+ bool ok;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tstream_writev_queue_state);
+ if (!req) {
+ return NULL;
+ }
+
+ state->caller.ev = ev;
+ state->caller.stream = stream;
+ state->caller.vector = vector;
+ state->caller.count = count;
+ state->ret = -1;
+
+ ok = tevent_queue_add(queue,
+ ev,
+ req,
+ tstream_writev_queue_trigger,
+ NULL);
+ if (!ok) {
+ tevent_req_nomem(NULL, req);
+ goto post;
+ }
+
+ return req;
+
+ post:
+ return tevent_req_post(req, ev);
+}
+
+static void tstream_writev_queue_trigger(struct tevent_req *req,
+ void *private_data)
+{
+ struct tstream_writev_queue_state *state = tevent_req_data(req,
+ struct tstream_writev_queue_state);
+ struct tevent_req *subreq;
+
+ subreq = tstream_writev_send(state,
+ state->caller.ev,
+ state->caller.stream,
+ state->caller.vector,
+ state->caller.count);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, tstream_writev_queue_done ,req);
+}
+
+static void tstream_writev_queue_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tstream_writev_queue_state *state = tevent_req_data(req,
+ struct tstream_writev_queue_state);
+ int ret;
+ int sys_errno;
+
+ ret = tstream_writev_recv(subreq, &sys_errno);
+ talloc_free(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+int tstream_writev_queue_recv(struct tevent_req *req, int *perrno)
+{
+ struct tstream_writev_queue_state *state = tevent_req_data(req,
+ struct tstream_writev_queue_state);
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+