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+/*
+ * 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) 1999,2002 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@ise.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"
+
+
+/*
+ * The thread reuse stack is a simple LIFO stack managed through a singly
+ * linked list element in the pthread_t struct.
+ *
+ * All thread structs on the stack are clean and ready for reuse.
+ *
+ * The pthread_t_ struct's prevReuse element can be tested to check for an invalid
+ * thread ID. A NULL value indicates a valid thread. Applications should use the
+ * pthread_kill() function with a zero signal value to test for a valid thread ID.
+ */
+
+/*
+ * Pop a clean pthread_t struct off the reuse stack.
+ */
+pthread_t
+ptw32_threadReusePop (void)
+{
+ pthread_t t;
+
+ EnterCriticalSection(&ptw32_thread_reuse_lock);
+
+ t = ptw32_threadReuseTop;
+
+ if (PTW32_THREAD_REUSE_BOTTOM != t)
+ {
+ ptw32_threadReuseTop = t->prevReuse;
+ t->prevReuse = NULL;
+ }
+ else
+ {
+ t = NULL;
+ }
+
+ LeaveCriticalSection(&ptw32_thread_reuse_lock);
+
+ return t;
+
+}
+
+/*
+ * Push a clean pthread_t struct onto the reuse stack.
+ */
+void
+ptw32_threadReusePush (pthread_t thread)
+{
+ EnterCriticalSection(&ptw32_thread_reuse_lock);
+
+ memset(thread, 0, sizeof (*thread));
+ thread->prevReuse = ptw32_threadReuseTop;
+ ptw32_threadReuseTop = thread;
+
+ LeaveCriticalSection(&ptw32_thread_reuse_lock);
+}
+