104 lines
5.3 KiB
C
104 lines
5.3 KiB
C
/**************************************************************************/
|
|
/* */
|
|
/* Copyright (c) Microsoft Corporation. All rights reserved. */
|
|
/* */
|
|
/* This software is licensed under the Microsoft Software License */
|
|
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
|
|
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
|
|
/* and in the root directory of this software. */
|
|
/* */
|
|
/**************************************************************************/
|
|
|
|
|
|
/**************************************************************************/
|
|
/**************************************************************************/
|
|
/** */
|
|
/** 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 */
|
|
/* */
|
|
/* sem_post PORTABLE C */
|
|
/* 6.x */
|
|
/* AUTHOR */
|
|
/* */
|
|
/* William E. Lamie, Microsoft Corporation */
|
|
/* */
|
|
/* DESCRIPTION */
|
|
/* */
|
|
/* This function releases/puts back a semaphore token. */
|
|
/* */
|
|
/* INPUT */
|
|
/* */
|
|
/* sem semaphore descriptor */
|
|
/* */
|
|
/* OUTPUT */
|
|
/* */
|
|
/* temp1 If successful */
|
|
/* ERROR If fails */
|
|
/* */
|
|
/* CALLS */
|
|
/* */
|
|
/* tx_semaphore_put ThreadX Semaphore put */
|
|
/* posix_internal_error Internal posix error */
|
|
/* */
|
|
/* CALLED BY */
|
|
/* */
|
|
/* Application Code */
|
|
/* */
|
|
/* RELEASE HISTORY */
|
|
/* */
|
|
/* DATE NAME DESCRIPTION */
|
|
/* */
|
|
/* xx-xx-xxxx William E. Lamie Initial Version 6.x */
|
|
/* */
|
|
/**************************************************************************/
|
|
INT sem_post(sem_t * sem)
|
|
{
|
|
|
|
TX_SEMAPHORE *TheSem;
|
|
UINT temp1;
|
|
|
|
/* Assign a temporary variable for clarity. */
|
|
TheSem = (TX_SEMAPHORE *)sem;
|
|
|
|
if( !TheSem || TheSem->tx_semaphore_id != TX_SEMAPHORE_ID)
|
|
{
|
|
/* Set appropriate errno. */
|
|
posix_errno = EINVAL;
|
|
posix_set_pthread_errno(EINVAL);
|
|
/* Return ERROR. */
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Place an instance of the semaphore. */
|
|
temp1 = tx_semaphore_put(TheSem);
|
|
|
|
/* Make sure the semaphore was incremented. */
|
|
if (temp1 != TX_SUCCESS)
|
|
{
|
|
|
|
/* return generic error. */
|
|
posix_internal_error(159);
|
|
|
|
/* Return ERROR. */
|
|
return (ERROR);
|
|
}
|
|
|
|
/* All done. */
|
|
return(temp1);
|
|
}
|