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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 */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* pthread_cancel PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* The pthread_cancel function shall request that thread be canceled. */
/* The target thread�s cancelability state and type determines when */
/* the cancellation takes effect. When the cancellation is acted on, */
/* the cancelation cleanup handlers for thread shall be called. When */
/* the last cancelation cleanup handler returns, the thread-specific */
/* data destructor functions shall be called for thread. When the last */
/* destructor function returns, thread shall be terminated. */
/* */
/* INPUT */
/* */
/* thread pthread handle to thread to be canceled */
/* */
/* OUTPUT */
/* */
/* zero If successful */
/* error number If fails */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
INT pthread_cancel(pthread_t thread)
{
TX_THREAD *thread_ptr;
POSIX_TCB *pthread_ptr;
/* Get the thread identifier of the pthread to be canceled */
thread_ptr = posix_tid2thread(thread);
if( (thread_ptr->tx_thread_state == TX_COMPLETED) || (thread_ptr->tx_thread_state == TX_TERMINATED) )
{
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
return(EINVAL);
}
/* get posix TCB for this pthread */
pthread_ptr = (POSIX_TCB *)thread_ptr;
/* Check if target pthread is created with cancel enable */
if ( pthread_ptr->cancel_state != PTHREAD_CANCEL_ENABLE)
{
posix_errno= EINVAL;
posix_set_pthread_errno(EINVAL);
return(EINVAL);
}
if( pthread_ptr->cancel_type==PTHREAD_CANCEL_DEFERRED )
{
/* set cancel request for cancelation point */
pthread_ptr->cancel_request=TRUE;
}
else if(pthread_ptr->cancel_type==PTHREAD_CANCEL_ASYNCHRONOUS )
{
/* Signal the housekeeping ThreadX thread to cancel (delete) the requested pthread now */
posix_destroy_pthread(pthread_ptr,(VOID *)0);
}
else /* illegal value in pthread_ptr->cancel_type */
{
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
return(EINVAL);
}
/* Indicate success. */
return(OK);
}
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