mirror of
https://github.com/azure-rtos/threadx
synced 2025-01-30 08:02:57 +08:00
113 lines
6.4 KiB
C
113 lines
6.4 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** POSIX wrapper for THREADX */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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/* Include necessary system files. */
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#include "tx_api.h" /* Threadx API */
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#include "pthread.h" /* Posix API */
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#include "px_int.h" /* Posix helper functions */
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#include <limits.h>
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* nanosleep PORTABLE C */
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/* 6.2.0 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function shall cause the current thread to be suspended from */
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/* execution until the time interval specified by the req argument has */
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/* elapsed. */
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/* */
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/* INPUT */
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/* */
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/* req The number of real-time (as opposed */
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/* to CPU-time) seconds and nanoseconds to */
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/* suspend the calling thread. */
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/* rem Points to a structure to receive the */
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/* remaining time if the function is */
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/* interrupted by a signal. This pointer */
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/* may be NULL. */
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/* */
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/* OUTPUT */
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/* */
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/* zero If the function returns because the */
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/* requested time has elapsed. */
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/* */
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/* -1 If this functions fails if req argument */
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/* specified a nanosecond value greater */
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/* than or equal to 1 billion. */
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/* */
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/* */
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/* CALLS */
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/* */
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/* tx_thread_sleep ThreadX thread sleep service */
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/* */
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/* CALLED BY */
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/* */
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/* Application Code */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
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/* 10-31-2022 Scott Larson Fix bounds check, */
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/* resulting in version 6.2.0 */
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/* */
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/**************************************************************************/
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INT nanosleep(struct timespec *req, struct timespec *rem)
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{
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ULONG timer_ticks;
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/* Check for valid inputs - the nanosecond value must be less than 1 billion
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and not roll over when converting to ThreadX timer ticks. */
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if ( (!req) || (req->tv_nsec > 999999999) || ((timer_ticks = (req->tv_sec * CPU_TICKS_PER_SECOND + req->tv_nsec/NANOSECONDS_IN_CPU_TICK)) < req->tv_sec) )
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{
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posix_errno = EINVAL;
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posix_set_pthread_errno(EINVAL);
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return(ERROR);
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}
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/* Add padding of 1 so that the thread will sleep no less than the specified time,
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except in the case that timer_ticks is ULONG_MAX */
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if(timer_ticks != ULONG_MAX)
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{
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timer_ticks = timer_ticks + 1;
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}
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/* Now call ThreadX thread sleep service. */
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tx_thread_sleep(timer_ticks);
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/* Sleep completed. */
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if (rem)
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{
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rem->tv_nsec = 0;
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rem->tv_sec = 0;
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}
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return(OK);
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}
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