| 1 | /* ncurses-minesweeper Copyright (c) 2021 Joshua 'joshuas3' Stockin |
| 2 | * <https://joshstock.in> |
| 3 | * <https://git.joshstock.in/ncurses-minesweeper> |
| 4 | * |
| 5 | * This software is licensed and distributed under the terms of the MIT License. |
| 6 | * See the MIT License in the LICENSE file of this project's root folder. |
| 7 | * |
| 8 | * This comment block and its contents, including this disclaimer, MUST be |
| 9 | * preserved in all copies or distributions of this software's source. |
| 10 | */ |
| 11 |
|
| 12 | #include <stdint.h> |
| 13 | #include <stdlib.h> |
| 14 |
|
| 15 | #if defined(__unix__) || defined(unix) || defined(__unix) || defined(__CYGWIN__) |
| 16 | # include <sys/time.h> |
| 17 | uint64_t time_us(void) { |
| 18 | uint64_t us; |
| 19 | struct timeval lnm_current_time; |
| 20 | gettimeofday(&lnm_current_time, NULL); |
| 21 | us = (lnm_current_time.tv_sec * 1000000ULL + lnm_current_time.tv_usec); |
| 22 | return us; |
| 23 | } |
| 24 | #elif defined(_WIN32) || defined(__WINDOWS__) |
| 25 | # include <sysinfoapi.h> |
| 26 | # include <windows.h> |
| 27 | uint64_t time_us(void) { |
| 28 | uint64_t us; |
| 29 | // get system time in ticks |
| 30 | FILETIME lnm_win32_filetime; |
| 31 | GetSystemTimeAsFileTime(&lnm_win32_filetime); |
| 32 | // load time from two 32-bit words into one 64-bit integer |
| 33 | us = lnm_win32_filetime.dwHighDateTime; |
| 34 | us = us << 32; |
| 35 | us |= lnm_win32_filetime.dwLowDateTime; |
| 36 | // convert to microseconds |
| 37 | us /= 10ULL; // is there a better way to do this? |
| 38 | // convert from time since Windows NT epoch to time since Unix epoch |
| 39 | us -= 11644473600000000ULL; |
| 40 | return us; |
| 41 | } |
| 42 | #endif |
| 43 |
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