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/* Implementation of threads compatibility routines for libgcc2. */
/* Copyright (C) 1999-2024 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any later
version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This module is separate from the rest of the implementation because it
references symbols in system libraries that are only available on Vista
and Server 2008 or later versions. */
/* Get the out-of-line version of the inline routines. */
#if _WIN32_WINNT < 0x0600
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0600
#endif
#define __GTHREAD_WIN32_COND_INLINE
#define __gthread_cond_init_function __gthr_win32_cond_init_function
#define __gthread_cond_broadcast __gthr_win32_cond_broadcast
#define __gthread_cond_signal __gthr_win32_cond_signal
#define __gthread_cond_wait __gthr_win32_cond_wait
#define __gthread_cond_timedwait __gthr_win32_cond_timedwait
#include "gthr-win32.h"
/* The number of 100-nanoseconds between 1/1/1601 and 1/1/1970. */
#define FILETIME_1970 116444736000000000ULL
/* The number of 100-nanoseconds per second. */
#define NSEC100_PER_SEC (1000000000ULL / 100)
/* The number of 100-nanoseconds per millisecond. */
#define NSEC100_PER_MSEC (NSEC100_PER_SEC / 1000)
/* The ceiling division of X by Y. */
#define CEIL_DIV(X, Y) (((X) + (Y) - 1) / (Y))
/* Convert absolute thread time to relative time in millisecond. */
DWORD
__gthr_win32_abs_to_rel_time (const __gthread_time_t *abs_time)
{
union {
ULONGLONG nsec100;
FILETIME ft;
} now;
ULONGLONG abs_time_nsec100;
/* The Windows epoch is 1/1/1601 while the Unix epoch is 1/1/1970. */
GetSystemTimeAsFileTime (&now.ft);
now.nsec100 -= FILETIME_1970;
abs_time_nsec100
= (ULONGLONG) abs_time->tv_sec * NSEC100_PER_SEC
+ CEIL_DIV (abs_time->tv_nsec, 100);
if (abs_time_nsec100 < now.nsec100)
return 0;
return (DWORD) CEIL_DIV (abs_time_nsec100 - now.nsec100, NSEC100_PER_SEC);
}
/* Check the sizes of the local version of the Win32 types. */
#define CHECK_SIZE_OF(TYPE) \
typedef int assertion[sizeof(__gthr_win32_##TYPE) == sizeof(TYPE) ? 1 : -1];
CHECK_SIZE_OF (CONDITION_VARIABLE)
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