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63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
#ifndef MYSQL_SERVICE_THD_RND_INCLUDED
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/* Copyright (C) 2017 MariaDB Corporation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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/**
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@file
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This service provides access to the thd-local random number generator.
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It's preferable over the global one, because concurrent threads
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can generate random numbers without fighting each other over the access
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to the shared rnd state.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MYSQL_ABI_CHECK
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#include <stdlib.h>
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#endif
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extern struct thd_rnd_service_st {
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double (*thd_rnd_ptr)(MYSQL_THD thd);
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void (*thd_c_r_p_ptr)(MYSQL_THD thd, char *to, size_t length);
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} *thd_rnd_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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#define thd_rnd(A) thd_rnd_service->thd_rnd_ptr(A)
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#define thd_create_random_password(A,B,C) thd_rnd_service->thd_c_r_p_ptr(A,B,C)
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#else
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double thd_rnd(MYSQL_THD thd);
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/**
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Generate string of printable random characters of requested length.
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@param to[out] Buffer for generation; must be at least length+1 bytes
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long; result string is always null-terminated
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@param length[in] How many random characters to put in buffer
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*/
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void thd_create_random_password(MYSQL_THD thd, char *to, size_t length);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#define MYSQL_SERVICE_THD_RND_INCLUDED
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#endif
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