89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/* Implementation of threads compatibility routines for libgcc2. */
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/* Copyright (C) 1999-2025 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This module is separate from the rest of the implementation because it
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references symbols in system libraries that are only available on Vista
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and Server 2008 or later versions. */
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/* Get the out-of-line version of the inline routines. */
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#if _WIN32_WINNT < 0x0600
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#undef _WIN32_WINNT
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#define _WIN32_WINNT 0x0600
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#endif
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#define __GTHREAD_WIN32_COND_INLINE
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#define __gthread_cond_init_function __gthr_win32_cond_init_function
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#define __gthread_cond_broadcast __gthr_win32_cond_broadcast
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#define __gthread_cond_signal __gthr_win32_cond_signal
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#define __gthread_cond_wait __gthr_win32_cond_wait
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#define __gthread_cond_timedwait __gthr_win32_cond_timedwait
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#include "gthr-win32.h"
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/* The number of 100-nanoseconds between 1/1/1601 and 1/1/1970. */
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#define FILETIME_1970 116444736000000000ULL
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/* The number of 100-nanoseconds per second. */
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#define NSEC100_PER_SEC (1000000000ULL / 100)
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/* The number of 100-nanoseconds per millisecond. */
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#define NSEC100_PER_MSEC (NSEC100_PER_SEC / 1000)
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/* The ceiling division of X by Y. */
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#define CEIL_DIV(X, Y) (((X) + (Y) - 1) / (Y))
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/* Convert absolute thread time to relative time in millisecond. */
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DWORD
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__gthr_win32_abs_to_rel_time (const __gthread_time_t *abs_time)
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{
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union {
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ULONGLONG nsec100;
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FILETIME ft;
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} now;
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ULONGLONG abs_time_nsec100;
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/* The Windows epoch is 1/1/1601 while the Unix epoch is 1/1/1970. */
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GetSystemTimeAsFileTime (&now.ft);
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now.nsec100 -= FILETIME_1970;
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abs_time_nsec100
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= (ULONGLONG) abs_time->tv_sec * NSEC100_PER_SEC
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+ CEIL_DIV (abs_time->tv_nsec, 100);
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if (abs_time_nsec100 < now.nsec100)
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return 0;
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return (DWORD) CEIL_DIV (abs_time_nsec100 - now.nsec100, NSEC100_PER_MSEC);
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}
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/* Check the sizes of the local version of the Win32 types. */
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#define CHECK_SIZE_OF(TYPE) \
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typedef int assertion[sizeof(__gthr_win32_##TYPE) == sizeof(TYPE) ? 1 : -1];
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CHECK_SIZE_OF (CONDITION_VARIABLE)
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