diff options
Diffstat (limited to 'ptw32_relmillisecs.c')
-rw-r--r-- | ptw32_relmillisecs.c | 240 |
1 files changed, 120 insertions, 120 deletions
diff --git a/ptw32_relmillisecs.c b/ptw32_relmillisecs.c index 2e6bc4d..11ff593 100644 --- a/ptw32_relmillisecs.c +++ b/ptw32_relmillisecs.c @@ -1,120 +1,120 @@ -/*
- * ptw32_relmillisecs.c
- *
- * Description:
- * This translation unit implements miscellaneous thread functions.
- *
- * --------------------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright(C) 1998 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#ifndef _UWIN
-//#include <process.h>
-#endif
-#include "pthread.h"
-#include "implement.h"
-#ifndef NEED_FTIME
-#include <sys/timeb.h>
-#endif
-
-
-INLINE DWORD
-ptw32_relmillisecs (const struct timespec * abstime)
-{
- const int64_t NANOSEC_PER_MILLISEC = 1000000;
- const int64_t MILLISEC_PER_SEC = 1000;
- DWORD milliseconds;
- int64_t tmpAbsMilliseconds;
- int64_t tmpCurrMilliseconds;
-#ifdef NEED_FTIME
- struct timespec currSysTime;
- FILETIME ft;
- SYSTEMTIME st;
-#else /* ! NEED_FTIME */
- struct _timeb currSysTime;
-#endif /* NEED_FTIME */
-
-
- /*
- * Calculate timeout as milliseconds from current system time.
- */
-
- /*
- * subtract current system time from abstime in a way that checks
- * that abstime is never in the past, or is never equivalent to the
- * defined INFINITE value (0xFFFFFFFF).
- *
- * Assume all integers are unsigned, i.e. cannot test if less than 0.
- */
- tmpAbsMilliseconds = (int64_t)abstime->tv_sec * MILLISEC_PER_SEC;
- tmpAbsMilliseconds += ((int64_t)abstime->tv_nsec + (NANOSEC_PER_MILLISEC/2)) / NANOSEC_PER_MILLISEC;
-
- /* get current system time */
-
-#ifdef NEED_FTIME
-
- GetSystemTime(&st);
- SystemTimeToFileTime(&st, &ft);
- /*
- * GetSystemTimeAsFileTime(&ft); would be faster,
- * but it does not exist on WinCE
- */
-
- ptw32_filetime_to_timespec(&ft, &currSysTime);
-
- tmpCurrMilliseconds = (int64_t)currSysTime.tv_sec * MILLISEC_PER_SEC;
- tmpCurrMilliseconds += ((int64_t)currSysTime.tv_nsec + (NANOSEC_PER_MILLISEC/2))
- / NANOSEC_PER_MILLISEC;
-
-#else /* ! NEED_FTIME */
-
- _ftime(&currSysTime);
-
- tmpCurrMilliseconds = (int64_t) currSysTime.time * MILLISEC_PER_SEC;
- tmpCurrMilliseconds += (int64_t) currSysTime.millitm;
-
-#endif /* NEED_FTIME */
-
- if (tmpAbsMilliseconds > tmpCurrMilliseconds)
- {
- milliseconds = (DWORD) (tmpAbsMilliseconds - tmpCurrMilliseconds);
- if (milliseconds == INFINITE)
- {
- /* Timeouts must be finite */
- milliseconds--;
- }
- }
- else
- {
- /* The abstime given is in the past */
- milliseconds = 0;
- }
-
- return milliseconds;
-}
+/* + * ptw32_relmillisecs.c + * + * Description: + * This translation unit implements miscellaneous thread functions. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.canberra.edu.au + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#ifndef _UWIN +//#include <process.h> +#endif +#include "pthread.h" +#include "implement.h" +#ifndef NEED_FTIME +#include <sys/timeb.h> +#endif + + +INLINE DWORD +ptw32_relmillisecs (const struct timespec * abstime) +{ + const int64_t NANOSEC_PER_MILLISEC = 1000000; + const int64_t MILLISEC_PER_SEC = 1000; + DWORD milliseconds; + int64_t tmpAbsMilliseconds; + int64_t tmpCurrMilliseconds; +#ifdef NEED_FTIME + struct timespec currSysTime; + FILETIME ft; + SYSTEMTIME st; +#else /* ! NEED_FTIME */ + struct _timeb currSysTime; +#endif /* NEED_FTIME */ + + + /* + * Calculate timeout as milliseconds from current system time. + */ + + /* + * subtract current system time from abstime in a way that checks + * that abstime is never in the past, or is never equivalent to the + * defined INFINITE value (0xFFFFFFFF). + * + * Assume all integers are unsigned, i.e. cannot test if less than 0. + */ + tmpAbsMilliseconds = (int64_t)abstime->tv_sec * MILLISEC_PER_SEC; + tmpAbsMilliseconds += ((int64_t)abstime->tv_nsec + (NANOSEC_PER_MILLISEC/2)) / NANOSEC_PER_MILLISEC; + + /* get current system time */ + +#ifdef NEED_FTIME + + GetSystemTime(&st); + SystemTimeToFileTime(&st, &ft); + /* + * GetSystemTimeAsFileTime(&ft); would be faster, + * but it does not exist on WinCE + */ + + ptw32_filetime_to_timespec(&ft, &currSysTime); + + tmpCurrMilliseconds = (int64_t)currSysTime.tv_sec * MILLISEC_PER_SEC; + tmpCurrMilliseconds += ((int64_t)currSysTime.tv_nsec + (NANOSEC_PER_MILLISEC/2)) + / NANOSEC_PER_MILLISEC; + +#else /* ! NEED_FTIME */ + + _ftime(&currSysTime); + + tmpCurrMilliseconds = (int64_t) currSysTime.time * MILLISEC_PER_SEC; + tmpCurrMilliseconds += (int64_t) currSysTime.millitm; + +#endif /* NEED_FTIME */ + + if (tmpAbsMilliseconds > tmpCurrMilliseconds) + { + milliseconds = (DWORD) (tmpAbsMilliseconds - tmpCurrMilliseconds); + if (milliseconds == INFINITE) + { + /* Timeouts must be finite */ + milliseconds--; + } + } + else + { + /* The abstime given is in the past */ + milliseconds = 0; + } + + return milliseconds; +} |