Delete bundled copy of NSS and replace with README.

nspr/pr/src/threads/combined/prustack.c

Index: nspr/pr/src/threads/combined/prustack.c
diff --git a/nspr/pr/src/threads/combined/prustack.c b/nspr/pr/src/threads/combined/prustack.c
deleted file mode 100644
index 59562bac4bd56de7854ac2a7340f4f5c0af1073a..0000000000000000000000000000000000000000
--- a/nspr/pr/src/threads/combined/prustack.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "primpl.h"
-
-/* List of free stack virtual memory chunks */
-PRLock *_pr_stackLock;
-PRCList _pr_freeStacks = PR_INIT_STATIC_CLIST(&_pr_freeStacks);
-PRIntn _pr_numFreeStacks;
-PRIntn _pr_maxFreeStacks = 4;
-
-#ifdef DEBUG
-/*
-** A variable that can be set via the debugger...
-*/
-PRBool _pr_debugStacks = PR_FALSE;
-#endif
-
-/* How much space to leave between the stacks, at each end */
-#define REDZONE		(2 << _pr_pageShift)
-
-#define _PR_THREAD_STACK_PTR(_qp) \
-    ((PRThreadStack*) ((char*) (_qp) - offsetof(PRThreadStack,links)))
-
-void _PR_InitStacks(void)
-{
-    _pr_stackLock = PR_NewLock();
-}
-
-void _PR_CleanupStacks(void)
-{
-    if (_pr_stackLock) {
-        PR_DestroyLock(_pr_stackLock);
-        _pr_stackLock = NULL;
-    }
-}
-
-/*
-** Allocate a stack for a thread.
-*/
-PRThreadStack *_PR_NewStack(PRUint32 stackSize)
-{
-    PRCList *qp;
-    PRThreadStack *ts;
-    PRThread *thr;
-
-    /*
-    ** Trim the list of free stacks. Trim it backwards, tossing out the
-    ** oldest stack found first (this way more recent stacks have a
-    ** chance of being present in the data cache).
-    */
-    PR_Lock(_pr_stackLock);
-    qp = _pr_freeStacks.prev;
-    while ((_pr_numFreeStacks > _pr_maxFreeStacks) && (qp != &_pr_freeStacks)) {
-	ts = _PR_THREAD_STACK_PTR(qp);
-	thr = _PR_THREAD_STACK_TO_PTR(ts);
-	qp = qp->prev;
-	/*
-	 * skip stacks which are still being used
-	 */
-	if (thr->no_sched)
-		continue;
-	PR_REMOVE_LINK(&ts->links);
-
-	/* Give platform OS to clear out the stack for debugging */
-	_PR_MD_CLEAR_STACK(ts);
-
-	_pr_numFreeStacks--;
-	_PR_DestroySegment(ts->seg);
-	PR_DELETE(ts);
-    }
-
-    /*
-    ** Find a free thread stack. This searches the list of free'd up
-    ** virtually mapped thread stacks.
-    */
-    qp = _pr_freeStacks.next;
-    ts = 0;
-    while (qp != &_pr_freeStacks) {
-	ts = _PR_THREAD_STACK_PTR(qp);
-	thr = _PR_THREAD_STACK_TO_PTR(ts);
-	qp = qp->next;
-	/*
-	 * skip stacks which are still being used
-	 */
-	if ((!(thr->no_sched)) && ((ts->allocSize - 2*REDZONE) >= stackSize)) {
-	    /*
-	    ** Found a stack that is not in use and is big enough. Change
-	    ** stackSize to fit it.
-	    */
-	    stackSize = ts->allocSize - 2*REDZONE;
-	    PR_REMOVE_LINK(&ts->links);
-	    _pr_numFreeStacks--;
-	    ts->links.next = 0;
-	    ts->links.prev = 0;
-	    PR_Unlock(_pr_stackLock);
-	    goto done;
-	}
-	ts = 0;
-    }
-    PR_Unlock(_pr_stackLock);
-
-    if (!ts) {
-	/* Make a new thread stack object. */
-	ts = PR_NEWZAP(PRThreadStack);
-	if (!ts) {
-	    return NULL;
-	}
-
-	/*
-	** Assign some of the virtual space to the new stack object. We
-	** may not get that piece of VM, but if nothing else we will
-	** advance the pointer so we don't collide (unless the OS screws
-	** up).
-	*/
-	ts->allocSize = stackSize + 2*REDZONE;
-	ts->seg = _PR_NewSegment(ts->allocSize, 0);
-	if (!ts->seg) {
-	    PR_DELETE(ts);
-	    return NULL;
-	}
-	}
-
-  done:
-    ts->allocBase = (char*)ts->seg->vaddr;
-    ts->flags = _PR_STACK_MAPPED;
-    ts->stackSize = stackSize;
-
-#ifdef HAVE_STACK_GROWING_UP
-    ts->stackTop = ts->allocBase + REDZONE;
-    ts->stackBottom = ts->stackTop + stackSize;
-#else
-    ts->stackBottom = ts->allocBase + REDZONE;
-    ts->stackTop = ts->stackBottom + stackSize;
-#endif
-
-    PR_LOG(_pr_thread_lm, PR_LOG_NOTICE,
-	   ("thread stack: base=0x%x limit=0x%x bottom=0x%x top=0x%x\n",
-	    ts->allocBase, ts->allocBase + ts->allocSize - 1,
-	    ts->allocBase + REDZONE,
-	    ts->allocBase + REDZONE + stackSize - 1));
-	    
-    _PR_MD_INIT_STACK(ts,REDZONE);
-
-    return ts;
-}
-
-/*
-** Free the stack for the current thread
-*/
-void _PR_FreeStack(PRThreadStack *ts)
-{
-    if (!ts) {
-	return;
-    }
-    if (ts->flags & _PR_STACK_PRIMORDIAL) {
-	PR_DELETE(ts);
-	return;
-    }
-
-    /*
-    ** Put the stack on the free list. This is done because we are still
-    ** using the stack. Next time a thread is created we will trim the
-    ** list down; it's safe to do it then because we will have had to
-    ** context switch to a live stack before another thread can be
-    ** created.
-    */
-    PR_Lock(_pr_stackLock);
-    PR_APPEND_LINK(&ts->links, _pr_freeStacks.prev);
-    _pr_numFreeStacks++;
-    PR_Unlock(_pr_stackLock);
-}