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