cpukit/libtest/t-test-rtems-fds.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSTestFrameworkImpl
0007  *
0008  * @brief This source file contains the implementation of
0009  *   T_check_file_descriptors().
0010  */
0011
0012 /*
0013  * Copyright (C) 2018 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #include <rtems/test.h>
0038
0039 #include <rtems/libio_.h>
0040
0041 static int T_open_fds;
0042
0043 static int
0044 T_count_open_fds(void)
0045 {
0046     int free_count;
0047     rtems_libio_t *iop;
0048
0049     free_count = 0;
0050     rtems_libio_lock();
0051
0052     iop = rtems_libio_iop_free_head;
0053     while (iop != NULL) {
0054         ++free_count;
0055         iop = iop->data1;
0056     }
0057
0058     rtems_libio_unlock();
0059     return (int)rtems_libio_number_iops - free_count;
0060 }
0061
0062 static void
0063 T_check_open_fds(void)
0064 {
0065     int open_fds;
0066     int delta;
0067
0068     open_fds = T_count_open_fds();
0069     delta = open_fds - T_open_fds;
0070
0071     if (delta != 0) {
0072         T_open_fds = open_fds;
0073         T_check(&T_special, false, "file descriptor leak (%i)",
0074             delta);
0075     }
0076 }
0077
0078 void
0079 T_check_file_descriptors(T_event event, const char *name)
0080 {
0081     (void)name;
0082
0083     switch (event) {
0084     case T_EVENT_RUN_INITIALIZE_EARLY:
0085         T_open_fds = T_count_open_fds();
0086         break;
0087     case T_EVENT_CASE_END:
0088         T_check_open_fds();
0089         break;
0090     default:
0091         break;
0092     };
0093 }