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/*
Unix SMB/CIFS implementation.
Copyright (C) Andrew Tridgell 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
composite API helper functions
*/
#include "includes.h"
#include "lib/events/events.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "lib/messaging/irpc.h"
/*
block until a composite function has completed, then return the status
*/
NTSTATUS composite_wait(struct composite_context *c)
{
if (c == NULL) return NT_STATUS_NO_MEMORY;
while (c->state < COMPOSITE_STATE_DONE) {
if (event_loop_once(c->event_ctx) != 0) {
return NT_STATUS_UNSUCCESSFUL;
}
}
return c->status;
}
/*
callback from composite_trigger_done()
*/
static void composite_trigger(struct event_context *ev, struct timed_event *te,
struct timeval t, void *ptr)
{
struct composite_context *c = talloc_get_type(ptr, struct composite_context);
if (c->async.fn) {
c->async.fn(c);
}
}
/*
trigger an immediate 'done' event on a composite context
this is used when the composite code works out that the call
can be completed without waiting for any external event
*/
void composite_trigger_done(struct composite_context *c)
{
c->state = COMPOSITE_STATE_DONE;
/* a zero timeout means immediate */
event_add_timed(c->event_ctx, c, timeval_zero(), composite_trigger, c);
}
void composite_trigger_error(struct composite_context *c)
{
c->state = COMPOSITE_STATE_ERROR;
/* a zero timeout means immediate */
event_add_timed(c->event_ctx, c, timeval_zero(), composite_trigger, c);
}
/*
* Some composite helpers that are handy if you write larger composite
* functions.
*/
BOOL composite_is_ok(struct composite_context *ctx)
{
if (NT_STATUS_IS_OK(ctx->status)) {
return True;
}
ctx->state = COMPOSITE_STATE_ERROR;
if (ctx->async.fn != NULL) {
ctx->async.fn(ctx);
}
return False;
}
void composite_error(struct composite_context *ctx, NTSTATUS status)
{
ctx->status = status;
SMB_ASSERT(!composite_is_ok(ctx));
}
BOOL composite_nomem(const void *p, struct composite_context *ctx)
{
if (p != NULL) {
return False;
}
composite_error(ctx, NT_STATUS_NO_MEMORY);
return True;
}
void composite_done(struct composite_context *ctx)
{
ctx->state = COMPOSITE_STATE_DONE;
if (ctx->async.fn != NULL) {
ctx->async.fn(ctx);
}
}
void composite_continue(struct composite_context *ctx,
struct composite_context *new_ctx,
void (*continuation)(struct composite_context *),
void *private_data)
{
if (composite_nomem(new_ctx, ctx)) return;
new_ctx->async.fn = continuation;
new_ctx->async.private_data = private_data;
}
void composite_continue_rpc(struct composite_context *ctx,
struct rpc_request *new_req,
void (*continuation)(struct rpc_request *),
void *private_data)
{
if (composite_nomem(new_req, ctx)) return;
new_req->async.callback = continuation;
new_req->async.private = private_data;
}
void composite_continue_irpc(struct composite_context *ctx,
struct irpc_request *new_req,
void (*continuation)(struct irpc_request *),
void *private_data)
{
if (composite_nomem(new_req, ctx)) return;
new_req->async.fn = continuation;
new_req->async.private = private_data;
}
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