From 682f23e7bb4a52bedf46eff5c4859e1308eda124 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Tue, 25 Aug 2015 19:56:24 +0200 Subject: Update build ref --- pthreads/src/ptw32_reuse.c | 151 --------------------------------------------- 1 file changed, 151 deletions(-) delete mode 100644 pthreads/src/ptw32_reuse.c (limited to 'pthreads/src/ptw32_reuse.c') diff --git a/pthreads/src/ptw32_reuse.c b/pthreads/src/ptw32_reuse.c deleted file mode 100644 index 7325857..0000000 --- a/pthreads/src/ptw32_reuse.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * ptw32_threadReuse.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 - */ - -#include "pthread.h" -#include "implement.h" - - -/* - * How it works: - * A pthread_t is a struct (2x32 bit scalar types on IA-32, 2x64 bit on IA-64) - * which is normally passed/returned by value to/from pthreads routines. - * Applications are therefore storing a copy of the struct as it is at that - * time. - * - * The original pthread_t struct plus all copies of it contain the address of - * the thread state struct ptw32_thread_t_ (p), plus a reuse counter (x). Each - * ptw32_thread_t contains the original copy of it's pthread_t. - * Once malloced, a ptw32_thread_t_ struct is not freed until the process exits. - * - * The thread reuse stack is a simple LILO stack managed through a singly - * linked list element in the ptw32_thread_t. - * - * Each time a thread is destroyed, the ptw32_thread_t address is pushed onto the - * reuse stack after it's ptHandle's reuse counter has been incremented. - * - * The following can now be said from this: - * - two pthread_t's are identical if their ptw32_thread_t reference pointers - * are equal and their reuse counters are equal. That is, - * - * equal = (a.p == b.p && a.x == b.x) - * - * - a pthread_t copy refers to a destroyed thread if the reuse counter in - * the copy is not equal to the reuse counter in the original. - * - * threadDestroyed = (copy.x != ((ptw32_thread_t *)copy.p)->ptHandle.x) - * - */ - -/* - * Pop a clean pthread_t struct off the reuse stack. - */ -pthread_t -ptw32_threadReusePop (void) -{ - pthread_t t = {NULL, 0}; - ptw32_mcs_local_node_t node; - - ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node); - - if (PTW32_THREAD_REUSE_EMPTY != ptw32_threadReuseTop) - { - ptw32_thread_t * tp; - - tp = ptw32_threadReuseTop; - - ptw32_threadReuseTop = tp->prevReuse; - - if (PTW32_THREAD_REUSE_EMPTY == ptw32_threadReuseTop) - { - ptw32_threadReuseBottom = PTW32_THREAD_REUSE_EMPTY; - } - - tp->prevReuse = NULL; - - t = tp->ptHandle; - } - - ptw32_mcs_lock_release(&node); - - return t; - -} - -/* - * Push a clean pthread_t struct onto the reuse stack. - * Must be re-initialised when reused. - * All object elements (mutexes, events etc) must have been either - * detroyed before this, or never initialised. - */ -void -ptw32_threadReusePush (pthread_t thread) -{ - ptw32_thread_t * tp = (ptw32_thread_t *) thread.p; - pthread_t t; - ptw32_mcs_local_node_t node; - - ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node); - - t = tp->ptHandle; - memset(tp, 0, sizeof(ptw32_thread_t)); - - /* Must restore the original POSIX handle that we just wiped. */ - tp->ptHandle = t; - - /* Bump the reuse counter now */ -#if defined(PTW32_THREAD_ID_REUSE_INCREMENT) - tp->ptHandle.x += PTW32_THREAD_ID_REUSE_INCREMENT; -#else - tp->ptHandle.x++; -#endif - - tp->state = PThreadStateReuse; - - tp->prevReuse = PTW32_THREAD_REUSE_EMPTY; - - if (PTW32_THREAD_REUSE_EMPTY != ptw32_threadReuseBottom) - { - ptw32_threadReuseBottom->prevReuse = tp; - } - else - { - ptw32_threadReuseTop = tp; - } - - ptw32_threadReuseBottom = tp; - - ptw32_mcs_lock_release(&node); -} -- cgit v1.2.3