77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <windows.h>
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#include <errno.h>
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#include <limits.h>
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HANDLE waitTimer = NULL;
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void init_sleep(void) {
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waitTimer = CreateWaitableTimer(NULL, TRUE, NULL);
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}
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void deinit_sleep(void) {
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if (waitTimer != NULL) {
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CloseHandle(waitTimer);
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waitTimer = NULL;
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}
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}
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int usleep_impl(__int64 usec) {
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if (waitTimer == NULL) {
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errno = EAGAIN;
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return -1;
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}
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if (usec < 0 || usec > LLONG_MAX / 10) {
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errno = EINVAL;
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return -1;
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}
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LARGE_INTEGER ft;
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ft.QuadPart = -10 * usec; // 100 nanosecond interval, negative value = relative time
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if (SetWaitableTimer(waitTimer, &ft, 0, NULL, NULL, 0) == 0) {
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errno = EINVAL;
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return -1;
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}
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if (WaitForSingleObject(waitTimer, INFINITE) != WAIT_OBJECT_0) {
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errno = EAGAIN;
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return -1;
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}
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return 0;
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}
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#ifdef _MSC_VER // mingw and the likes provide their own usleep()
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int usleep(__int64 usec) {
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return usleep_impl(usec);
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}
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#endif
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void msec_sleep(double msec) {
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const double usec = msec * 1000.0;
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usleep_impl(usec > (double)LLONG_MAX ? LLONG_MAX : (__int64)usec);
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}
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