mhd_mono_clock.h (3124B)
1 /* SPDX-License-Identifier: LGPL-2.1-or-later OR (GPL-2.0-or-later WITH eCos-exception-2.0) */ 2 /* 3 This file is part of GNU libmicrohttpd. 4 Copyright (C) 2015-2024 Karlson2k (Evgeny Grin) 5 6 GNU libmicrohttpd is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 GNU libmicrohttpd is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 Alternatively, you can redistribute GNU libmicrohttpd and/or 17 modify it under the terms of the GNU General Public License as 18 published by the Free Software Foundation; either version 2 of 19 the License, or (at your option) any later version, together 20 with the eCos exception, as follows: 21 22 As a special exception, if other files instantiate templates or 23 use macros or inline functions from this file, or you compile this 24 file and link it with other works to produce a work based on this 25 file, this file does not by itself cause the resulting work to be 26 covered by the GNU General Public License. However the source code 27 for this file must still be made available in accordance with 28 section (3) of the GNU General Public License v2. 29 30 This exception does not invalidate any other reasons why a work 31 based on this file might be covered by the GNU General Public 32 License. 33 34 You should have received copies of the GNU Lesser General Public 35 License and the GNU General Public License along with this library; 36 if not, see <https://www.gnu.org/licenses/>. 37 */ 38 39 /** 40 * @file src/mhd2/mhd_mono_clock.h 41 * @brief internal monotonic clock functions declarations 42 * @author Karlson2k (Evgeny Grin) 43 */ 44 45 #ifndef MHD_MONO_CLOCK_H 46 #define MHD_MONO_CLOCK_H 1 47 #include "mhd_sys_options.h" 48 49 #include "sys_base_types.h" 50 #include "sys_bool_type.h" 51 52 /** 53 * Initialise milliseconds counters completely. 54 * Must be called only one time per application run. 55 */ 56 MHD_INTERNAL void 57 mhd_mclock_init_once (void); 58 59 60 #ifdef HAVE_CLOCK_GET_TIME 61 /* Resources may be allocated only for Darwin clock_get_time() */ 62 63 /** 64 * Deinitialise milliseconds counters by freeing any allocated resources 65 */ 66 MHD_INTERNAL void 67 mhd_mclock_deinit (void); 68 69 /** 70 * Re-initialise monotonic clocks are de-initialisaion has been performed 71 */ 72 MHD_INTERNAL void 73 mhd_mclock_re_init (void); 74 75 #else /* ! HAVE_CLOCK_GET_TIME */ 76 /* No-op implementation */ 77 # define mhd_mclock_deinit() ((void) 0) 78 # define mhd_mclock_re_init() ((void) 0) 79 #endif /* ! HAVE_CLOCK_GET_TIME */ 80 81 82 /** 83 * Monotonic milliseconds counter, useful for timeout calculation. 84 * Tries to be not affected by manually setting the system real time 85 * clock or adjustments by NTP synchronization. 86 * 87 * @return number of microseconds from some fixed moment 88 */ 89 MHD_INTERNAL uint_fast64_t 90 mhd_monotonic_msec_counter (void); 91 92 #endif /* MHD_MONO_CLOCK_H */