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lightsd: get the build system and time_monotonic to work on Windows
This is the first step towards Windows portability.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,12 @@ | ||
| FUNCTION(ADD_ALL_SUBDIRECTORIES) | ||
| FILE(GLOB SUBDIRECTORIES "*") | ||
| FOREACH (ENTRY ${SUBDIRECTORIES}) | ||
| IF (IS_DIRECTORY ${ENTRY} AND EXISTS "${ENTRY}/CMakeLists.txt") | ||
| ADD_SUBDIRECTORY(${ENTRY}) | ||
| IF ( | ||
| IS_DIRECTORY "${ENTRY}" AND | ||
| NOT IS_SYMLINK "${ENTRY}" AND | ||
| EXISTS "${ENTRY}/CMakeLists.txt" | ||
| ) | ||
| ADD_SUBDIRECTORY("${ENTRY}") | ||
| ENDIF () | ||
| ENDFOREACH () | ||
| ENDFUNCTION() |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| #pragma once | ||
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| #include <stdlib.h> | ||
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| #if @BIG_ENDIAN_SYSTEM@ | ||
| # define htobe16(x) (x) | ||
| # define htole16(x) _byteswap_ushort(x) | ||
| # define be16toh(x) (x) | ||
| # define le16toh(x) _byteswap_ushort(x) | ||
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| # define htobe32(x) (x) | ||
| # define htole32(x) _byteswap_ulong(x) | ||
| # define be32toh(x) (x) | ||
| # define le32toh(x) _byteswap_ulong(x) | ||
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| # define htobe64(x) (x) | ||
| # define htole64(x) _byteswap_uint64(x) | ||
| # define be64toh(x) (x) | ||
| # define le64toh(x) _byteswap_uint64(x) | ||
| #else | ||
| # define htobe16(x) _byteswap_ushort(x) | ||
| # define htole16(x) (x) | ||
| # define be16toh(x) _byteswap_ushort(x) | ||
| # define le16toh(x) (x) | ||
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| # define htobe32(x) _byteswap_ulong(x) | ||
| # define htole32(x) (x) | ||
| # define be32toh(x) _byteswap_ulong(x) | ||
| # define le32toh(x) (x) | ||
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| # define htobe64(x) _byteswap_uint64(x) | ||
| # define htole64(x) (x) | ||
| # define be64toh(x) _byteswap_uint64(x) | ||
| # define le64toh(x) (x) | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // Copyright (c) 2017, Louis Opter <louis@opter.org> | ||
| // | ||
| // This file is part of lighstd. | ||
| // | ||
| // lighstd is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // lighstd is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with lighstd. If not, see <http://www.gnu.org/licenses/>. | ||
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| // See: | ||
| // | ||
| // https://msdn.microsoft.com/en-us/library/windows/desktop/ms686298(v=vs.85).aspx | ||
| // https://msdn.microsoft.com/en-us/library/dd743626(v=vs.85).aspx | ||
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| #include <Windows.h> | ||
| #include <stdbool.h> | ||
| #include <stdlib.h> | ||
| #include <stdio.h> | ||
| #include <stdint.h> | ||
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| #include "core/time_monotonic.h" | ||
| #include "core/lightsd.h" | ||
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| enum { TIMER_RESOLUTION_MS = 1 }; | ||
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| static UINT | ||
| _lgtd_set_timer_resolution(UINT resolution_ms) | ||
| { | ||
| TIMECAPS tc; | ||
| if (timeGetDevCaps(&tc, sizeof(tc)) != TIMERR_NOERROR) { | ||
| fprintf(stderr, "lightsd: multimedia timers unavailable."); | ||
| exit(1); | ||
| } | ||
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| UINT resolution = LGTD_MAX(tc.wPeriodMin, resolution_ms); | ||
| resolution = LGTD_MIN(resolution, tc.wPeriodMax); | ||
| timeBeginPeriod(resolution); | ||
| return resolution; | ||
| } | ||
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| static void | ||
| _lgtd_reset_timer_resolution(UINT resolution_ms) | ||
| { | ||
| if (timeEndPeriod(resolution_ms) != TIMERR_NOERROR) { | ||
| fprintf(stderr, "lightsd: can't reset timer resolution."); | ||
| } | ||
| } | ||
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| void | ||
| lgtd_sleep_monotonic_msecs(int msecs) | ||
| { | ||
| UINT actual = _lgtd_set_timer_resolution(TIMER_RESOLUTION_MS); | ||
| Sleep(msecs); | ||
| _lgtd_reset_timer_resolution(actual); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| // Copyright (c) 2017, Louis Opter <louis@opter.org> | ||
| // | ||
| // This file is part of lighstd. | ||
| // | ||
| // lighstd is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // lighstd is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with lighstd. If not, see <http://www.gnu.org/licenses/>. | ||
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| // This is pretty much "Using QPC in native code" from: | ||
| // | ||
| // https://msdn.microsoft.com/en-us/library/windows/desktop/dn553408(v=vs.85).aspx | ||
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| #include <Windows.h> | ||
| #include <stdbool.h> | ||
| #include <stdint.h> | ||
| #include <stdio.h> | ||
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| #include "core/time_monotonic.h" | ||
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| lgtd_time_mono_t | ||
| lgtd_time_monotonic_msecs(void) | ||
| { | ||
| static LARGE_INTEGER frequency = { .QuadPart = 0 }; // ticks per second | ||
| if (frequency.QuadPart == 0 | ||
| && QueryPerformanceFrequency(&frequency) == false) { | ||
| LPSTR msg = NULL; | ||
| DWORD msg_len = FormatMessageA( | ||
| FORMAT_MESSAGE_ALLOCATE_BUFFER | ||
| | FORMAT_MESSAGE_FROM_SYSTEM | ||
| | FORMAT_MESSAGE_IGNORE_INSERTS, | ||
| NULL, | ||
| GetLastError(), | ||
| MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | ||
| // By default the message is stored in the buffer pointed by | ||
| // lpMsgBuf, but we use FORMAT_MESSAGE_ALLOCATE_BUFFER to have | ||
| // the buffer allocated for us. | ||
| // So instead you need to give the function a pointer on your | ||
| // pointer instead of your buffer and do an ugly cast: | ||
| (LPSTR)&msg, | ||
| 0, | ||
| NULL | ||
| ); | ||
| if (!msg_len) { | ||
| msg = "unknown error"; | ||
| } | ||
| fprintf(stderr, "lightsd: QPC timer unavailable: %s.\r\n", msg); | ||
| exit(1); | ||
| } | ||
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| LARGE_INTEGER time; | ||
| QueryPerformanceCounter(&time); | ||
| // Multiply the number of ticks by 1000 first to get a final value in ms: | ||
| time.QuadPart *= 1000; | ||
| // Then (the order is important to avoid loosing precision) divide by the | ||
| // number of ticks per second: | ||
| time.QuadPart /= frequency.QuadPart; | ||
| return time.QuadPart; | ||
| } |
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