esp-idf/components/newlib/flockfile.c

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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <sys/lock.h>
#include <sys/reent.h>
void flockfile(FILE *fp)
{
if (fp && !(fp->_flags & __SSTR)) {
__lock_acquire_recursive(fp->_lock);
}
}
int ftrylockfile(FILE *fp)
{
if (fp && !(fp->_flags & __SSTR)) {
return __lock_try_acquire_recursive(fp->_lock);
}
return 0;
}
void funlockfile(FILE *fp)
{
if (fp && !(fp->_flags & __SSTR)) {
__lock_release_recursive(fp->_lock);
}
}