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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup POSIX_COND_VARS Condition Variables
*
* @brief Implements wake up version of the "signal" operation
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/condimpl.h>
/*
* _POSIX_Condition_variables_Signal_support
*
* A support routine which implements guts of the broadcast and single task
* wake up version of the "signal" operation.
*/
int _POSIX_Condition_variables_Signal_support(
pthread_cond_t *cond,
bool is_broadcast
)
{
POSIX_Condition_variables_Control *the_cond;
unsigned long flags;
Thread_queue_Context queue_context;
the_cond = _POSIX_Condition_variables_Get( cond );
POSIX_CONDITION_VARIABLES_VALIDATE_OBJECT( the_cond, flags );
_Thread_queue_Context_initialize( &queue_context );
do {
Thread_queue_Heads *heads;
_POSIX_Condition_variables_Acquire( the_cond, &queue_context );
heads = the_cond->Queue.Queue.heads;
if ( heads == NULL ) {
the_cond->mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX;
_POSIX_Condition_variables_Release( the_cond, &queue_context );
return 0;
}
_Thread_queue_Surrender_no_priority(
&the_cond->Queue.Queue,
heads,
&queue_context,
POSIX_CONDITION_VARIABLES_TQ_OPERATIONS
);
} while ( is_broadcast );
return 0;
}
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