posix/src/conddestroy.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  @brief Destroy a Condition Variable
0007  *  @ingroup POSIXAPI
0008  */
0009
0010 /*
0011  *  COPYRIGHT (c) 1989-2007.
0012  *  On-Line Applications Research Corporation (OAR).
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #ifdef HAVE_CONFIG_H
0037 #include "config.h"
0038 #endif
0039
0040 #include <rtems/posix/condimpl.h>
0041
0042 /**
0043  *  11.4.2 Initializing and Destroying a Condition Variable,
0044  *         P1003.1c/Draft 10, p. 87
0045  */
0046 int pthread_cond_destroy( pthread_cond_t *cond )
0047 {
0048   POSIX_Condition_variables_Control *the_cond;
0049   unsigned long                      flags;
0050   Thread_queue_Context               queue_context;
0051
0052   the_cond = _POSIX_Condition_variables_Get( cond );
0053   POSIX_CONDITION_VARIABLES_VALIDATE_OBJECT( the_cond, flags );
0054
0055   _Thread_queue_Context_initialize( &queue_context );
0056   _POSIX_Condition_variables_Acquire( the_cond, &queue_context );
0057
0058   if ( !_Thread_queue_Is_empty( &the_cond->Queue.Queue ) ) {
0059     _POSIX_Condition_variables_Release( the_cond, &queue_context );
0060     return EBUSY;
0061   }
0062
0063   _POSIX_Condition_variables_Release( the_cond, &queue_context );
0064   _POSIX_Condition_variables_Destroy( the_cond );
0065   return 0;
0066 }