utility/rtos_compatibility_layers/posix/px_sig_addset.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** POSIX wrapper for THREADX                                             */
/**                                                                       */
/**                                                                       */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

/* Include necessary system files.  */

#include "tx_api.h"     /* Threadx API */
#include "pthread.h"    /* Posix API */
#include "px_int.h"     /* Posix helper functions */
#include "tx_thread.h"  /* Internal ThreadX thread management.  */

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    sigaddset                                           PORTABLE C      */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function adds the individual signal specified by the signo to  */
/*    the signal set pointed to by set.                                   */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    set                            Pointer to set of signals            */
/*    signo                          Signal                               */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    OK                        If successful                             */
/*    ERROR                     If error occurs                           */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    posix_set_pthread_errno                                             */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
int   sigaddset(sigset_t *set, int signo)
{

    /* Determine if the desired signal is valid.  */
    if ((signo < 0) || (signo > SIGRTMAX))
    {

        /* Return an error.  */
        posix_set_pthread_errno(EINVAL);
        return(ERROR);
    }

    /* All is okay, set the appropriate signal bit.  */
    set -> signal_set =  set -> signal_set | (((ULONG) 1) << signo);

    /* Return success!  */
    return(OK);
}