2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2005
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 composite API helper functions
25 #include "lib/events/events.h"
26 #include "libcli/raw/libcliraw.h"
27 #include "libcli/composite/composite.h"
28 #include "lib/messaging/irpc.h"
31 block until a composite function has completed, then return the status
33 NTSTATUS composite_wait(struct composite_context *c)
35 if (c == NULL) return NT_STATUS_NO_MEMORY;
39 while (c->state < COMPOSITE_STATE_DONE) {
40 if (event_loop_once(c->event_ctx) != 0) {
41 return NT_STATUS_UNSUCCESSFUL;
50 * Some composite helpers that are handy if you write larger composite
53 BOOL composite_is_ok(struct composite_context *ctx)
55 if (NT_STATUS_IS_OK(ctx->status)) {
58 ctx->state = COMPOSITE_STATE_ERROR;
59 if (ctx->async.fn != NULL) {
66 callback from composite_done() and composite_error()
68 this is used to allow for a composite function to complete without
69 going through any state transitions. When that happens the caller
70 has had no opportunity to fill in the async callback fields
71 (ctx->async.fn and ctx->async.private) which means the usual way of
72 dealing with composite functions doesn't work. To cope with this,
73 we trigger a timer event that will happen then the event loop is
74 re-entered. This gives the caller a chance to setup the callback,
75 and allows the caller to ignore the fact that the composite
76 function completed early
78 static void composite_trigger(struct event_context *ev, struct timed_event *te,
79 struct timeval t, void *ptr)
81 struct composite_context *c = talloc_get_type(ptr, struct composite_context);
88 void composite_error(struct composite_context *ctx, NTSTATUS status)
90 if (!ctx->used_wait && !ctx->async.fn) {
91 event_add_timed(ctx->event_ctx, ctx, timeval_zero(), composite_trigger, ctx);
94 SMB_ASSERT(!composite_is_ok(ctx));
97 BOOL composite_nomem(const void *p, struct composite_context *ctx)
102 composite_error(ctx, NT_STATUS_NO_MEMORY);
106 void composite_done(struct composite_context *ctx)
108 if (!ctx->used_wait && !ctx->async.fn) {
109 event_add_timed(ctx->event_ctx, ctx, timeval_zero(), composite_trigger, ctx);
111 ctx->state = COMPOSITE_STATE_DONE;
112 if (ctx->async.fn != NULL) {
117 void composite_continue(struct composite_context *ctx,
118 struct composite_context *new_ctx,
119 void (*continuation)(struct composite_context *),
122 if (composite_nomem(new_ctx, ctx)) return;
123 new_ctx->async.fn = continuation;
124 new_ctx->async.private_data = private_data;
127 void composite_continue_rpc(struct composite_context *ctx,
128 struct rpc_request *new_req,
129 void (*continuation)(struct rpc_request *),
132 if (composite_nomem(new_req, ctx)) return;
133 new_req->async.callback = continuation;
134 new_req->async.private = private_data;
137 void composite_continue_irpc(struct composite_context *ctx,
138 struct irpc_request *new_req,
139 void (*continuation)(struct irpc_request *),
142 if (composite_nomem(new_req, ctx)) return;
143 new_req->async.fn = continuation;
144 new_req->async.private = private_data;
147 void composite_continue_smb(struct composite_context *ctx,
148 struct smbcli_request *new_req,
149 void (*continuation)(struct smbcli_request *),
152 if (composite_nomem(new_req, ctx)) return;
153 new_req->async.fn = continuation;
154 new_req->async.private = private_data;
157 void composite_continue_nbt(struct composite_context *ctx,
158 struct nbt_name_request *new_req,
159 void (*continuation)(struct nbt_name_request *),
162 if (composite_nomem(new_req, ctx)) return;
163 new_req->async.fn = continuation;
164 new_req->async.private = private_data;