mirror of
https://github.com/FirebirdSQL/firebird.git
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157 lines
3.6 KiB
C++
157 lines
3.6 KiB
C++
/*
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* PROGRAM: JRD Access Method
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* MODULE: thd.cpp
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* DESCRIPTION: Thread support routines
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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* 2002.10.28 Sean Leyne - Completed removal of obsolete "DGUX" port
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*
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* 2002.10.29 Sean Leyne - Removed obsolete "Netware" port
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*
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*/
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#include "firebird.h"
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#include <stdio.h>
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#include <errno.h>
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#include "../jrd/common.h"
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#include "../common/thd.h"
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#include "../jrd/gdsassert.h"
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#include "../common/classes/semaphore.h"
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#include "../common/classes/alloc.h"
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#include "../common/classes/init.h"
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#ifdef WIN_NT
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#include <process.h>
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#include <windows.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#ifdef USE_POSIX_THREADS
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#include <pthread.h>
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#endif
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FB_THREAD_ID getThreadId() throw()
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{
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/**************************************
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*
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* T H D _ g e t _ t h r e a d _ i d
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*
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**************************************
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*
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* Functional description
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* Get platform's notion of a thread ID.
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*
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**************************************/
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FB_THREAD_ID id = 1;
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#ifdef WIN_NT
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id = GetCurrentThreadId();
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#endif
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#ifdef USE_POSIX_THREADS
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id = (FB_THREAD_ID) pthread_self();
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#endif
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return id;
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}
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void THD_sleep(ULONG milliseconds)
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{
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/**************************************
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*
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* T H D _ s l e e p
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*
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**************************************
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*
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* Functional description
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* Thread sleeps for requested number
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* of milliseconds.
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*
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**************************************/
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#if defined(WIN_NT)
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SleepEx(milliseconds, FALSE);
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#elif defined(HAVE_NANOSLEEP)
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timespec timer, rem;
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timer.tv_sec = milliseconds / 1000;
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timer.tv_nsec = (milliseconds % 1000) * 1000000;
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while (nanosleep(&timer, &rem) != 0)
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{
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if (errno != EINTR)
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{
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Firebird::system_call_failed::raise("nanosleep");
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}
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timer = rem;
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}
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#else
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Firebird::Semaphore timer;
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timer.tryEnter(0, milliseconds);
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#endif
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}
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void THD_yield()
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{
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/**************************************
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*
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* T H D _ y i e l d
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*
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**************************************
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*
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* Functional description
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* Thread relinquishes the processor.
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*
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**************************************/
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#ifdef USE_POSIX_THREADS
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/* use sched_yield() instead of pthread_yield(). Because pthread_yield()
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is not part of the (final) POSIX 1003.1c standard. Several drafts of
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the standard contained pthread_yield(), but then the POSIX guys
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discovered it was redundant with sched_yield() and dropped it.
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So, just use sched_yield() instead. POSIX systems on which
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sched_yield() is available define _POSIX_PRIORITY_SCHEDULING
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in <unistd.h>. Darwin defined _POSIX_THREAD_PRIORITY_SCHEDULING
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instead of _POSIX_PRIORITY_SCHEDULING.
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*/
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#if (defined _POSIX_PRIORITY_SCHEDULING || defined _POSIX_THREAD_PRIORITY_SCHEDULING)
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sched_yield();
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#else
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pthread_yield();
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#endif // _POSIX_PRIORITY_SCHEDULING
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#endif
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#ifdef WIN_NT
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SleepEx(0, FALSE);
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#endif
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}
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