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/*
ctdb request id handling code
Copyright (C) Amitay Isaacs 2015
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 "replace.h"
#include <talloc.h>
#include "lib/util/idtree.h"
#include "reqid.h"
struct reqid_context {
struct idr_context *idr;
uint32_t lastid;
};
int reqid_init(TALLOC_CTX *mem_ctx, int start_id,
struct reqid_context **result)
{
struct reqid_context *reqid_ctx;
reqid_ctx = talloc_zero(mem_ctx, struct reqid_context);
if (reqid_ctx == NULL) {
return ENOMEM;
}
reqid_ctx->idr = idr_init(reqid_ctx);
if (reqid_ctx->idr == NULL) {
talloc_free(reqid_ctx);
return ENOMEM;
}
if (start_id <= 0) {
start_id = 1;
}
reqid_ctx->lastid = start_id;
*result = reqid_ctx;
return 0;
}
uint32_t reqid_new(struct reqid_context *reqid_ctx, void *private_data)
{
int id;
id = idr_get_new_above(reqid_ctx->idr, private_data,
reqid_ctx->lastid+1, INT_MAX);
if (id < 0) {
/* reqid wrapped */
id = idr_get_new(reqid_ctx->idr, private_data, INT_MAX);
}
if (id == -1) {
return REQID_INVALID;
}
reqid_ctx->lastid = id;
return id;
}
void *_reqid_find(struct reqid_context *reqid_ctx, uint32_t reqid)
{
return idr_find(reqid_ctx->idr, reqid);
}
int reqid_remove(struct reqid_context *reqid_ctx, uint32_t reqid)
{
int ret;
ret = idr_remove(reqid_ctx->idr, reqid);
if (ret < 0) {
return ENOENT;
}
return 0;
}
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