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authorAaron Spike <aaron@ekips.org>2006-04-12 13:20:54 +0000
committeracspike <acspike@users.sourceforge.net>2006-04-12 13:20:54 +0000
commitddfaffe08d23e4663fe759d67ae33fd67fc9ce5b (patch)
tree234f5425a7ef7058e69dc2ab77f89810e4f3ed91 /src/dom/js/jslock.h
parentfix 1466070 (diff)
downloadinkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.tar.gz
inkscape-ddfaffe08d23e4663fe759d67ae33fd67fc9ce5b.zip
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-#ifndef jslock_h__
-#define jslock_h__
-
-#ifdef JS_THREADSAFE
-
-#include "jstypes.h"
-#include "pratom.h"
-#include "prlock.h"
-#include "prcvar.h"
-
-#include "jsprvtd.h" /* for JSScope, etc. */
-#include "jspubtd.h" /* for JSRuntime, etc. */
-
-#define Thin_GetWait(W) ((jsword)(W) & 0x1)
-#define Thin_SetWait(W) ((jsword)(W) | 0x1)
-#define Thin_RemoveWait(W) ((jsword)(W) & ~0x1)
-
-typedef struct JSFatLock JSFatLock;
-
-struct JSFatLock {
- int susp;
- PRLock *slock;
- PRCondVar *svar;
- JSFatLock *next;
- JSFatLock **prevp;
-};
-
-typedef struct JSThinLock {
- jsword owner;
- JSFatLock *fat;
-} JSThinLock;
-
-typedef PRLock JSLock;
-
-typedef struct JSFatLockTable {
- JSFatLock *free;
- JSFatLock *taken;
-} JSFatLockTable;
-
-/*
- * Atomic increment and decrement for a reference counter, given jsrefcount *p.
- * NB: jsrefcount is int32, aka PRInt32, so that pratom.h functions work.
- */
-#define JS_ATOMIC_INCREMENT(p) PR_AtomicIncrement((PRInt32 *)(p))
-#define JS_ATOMIC_DECREMENT(p) PR_AtomicDecrement((PRInt32 *)(p))
-#define JS_ATOMIC_ADD(p,v) PR_AtomicAdd((PRInt32 *)(p), (PRInt32)(v))
-
-#define CurrentThreadId() (jsword)PR_GetCurrentThread()
-#define JS_CurrentThreadId() js_CurrentThreadId()
-#define JS_NEW_LOCK() PR_NewLock()
-#define JS_DESTROY_LOCK(l) PR_DestroyLock(l)
-#define JS_ACQUIRE_LOCK(l) PR_Lock(l)
-#define JS_RELEASE_LOCK(l) PR_Unlock(l)
-#define JS_LOCK0(P,M) js_Lock(P,M)
-#define JS_UNLOCK0(P,M) js_Unlock(P,M)
-
-#define JS_NEW_CONDVAR(l) PR_NewCondVar(l)
-#define JS_DESTROY_CONDVAR(cv) PR_DestroyCondVar(cv)
-#define JS_WAIT_CONDVAR(cv,to) PR_WaitCondVar(cv,to)
-#define JS_NO_TIMEOUT PR_INTERVAL_NO_TIMEOUT
-#define JS_NOTIFY_CONDVAR(cv) PR_NotifyCondVar(cv)
-#define JS_NOTIFY_ALL_CONDVAR(cv) PR_NotifyAllCondVar(cv)
-
-/*
- * Include jsscope.h so JS_LOCK_OBJ macro callers don't have to include it.
- * Since there is a JSThinLock member in JSScope, we can't nest this include
- * much earlier (see JSThinLock's typedef, above). Yes, that means there is
- * an #include cycle between jslock.h and jsscope.h: moderate-sized XXX here,
- * to be fixed by moving JS_LOCK_SCOPE to jsscope.h, JS_LOCK_OBJ to jsobj.h,
- * and so on.
- *
- * We also need jsscope.h #ifdef DEBUG for SET_OBJ_INFO and SET_SCOPE_INFO,
- * but we do not want any nested includes that depend on DEBUG. Those lead
- * to build bustage when someone makes a change that depends in a subtle way
- * on jsscope.h being included directly or indirectly, but does not test by
- * building optimized as well as DEBUG.
- */
-#include "jsscope.h"
-
-#ifdef DEBUG
-
-#define SET_OBJ_INFO(obj_,file_,line_) \
- SET_SCOPE_INFO(OBJ_SCOPE(obj_),file_,line_)
-
-#define SET_SCOPE_INFO(scope_,file_,line_) \
- ((scope_)->ownercx ? (void)0 : \
- (JS_ASSERT((0 < (scope_)->u.count && (scope_)->u.count <= 4) || \
- SCOPE_IS_SEALED(scope_)), \
- (void)((scope_)->file[(scope_)->u.count-1] = (file_), \
- (scope_)->line[(scope_)->u.count-1] = (line_))))
-#endif /* DEBUG */
-
-#define JS_LOCK_RUNTIME(rt) js_LockRuntime(rt)
-#define JS_UNLOCK_RUNTIME(rt) js_UnlockRuntime(rt)
-
-/*
- * NB: The JS_LOCK_OBJ and JS_UNLOCK_OBJ macros work *only* on native objects
- * (objects for which OBJ_IS_NATIVE returns true). All uses of these macros in
- * the engine are predicated on OBJ_IS_NATIVE or equivalent checks. These uses
- * are for optimizations above the JSObjectOps layer, under which object locks
- * normally hide.
- */
-#define JS_LOCK_OBJ(cx,obj) ((OBJ_SCOPE(obj)->ownercx == (cx)) \
- ? (void)0 \
- : (js_LockObj(cx, obj), \
- SET_OBJ_INFO(obj,__FILE__,__LINE__)))
-#define JS_UNLOCK_OBJ(cx,obj) ((OBJ_SCOPE(obj)->ownercx == (cx)) \
- ? (void)0 : js_UnlockObj(cx, obj))
-
-#define JS_LOCK_SCOPE(cx,scope) ((scope)->ownercx == (cx) ? (void)0 : \
- (js_LockScope(cx, scope), \
- SET_SCOPE_INFO(scope,__FILE__,__LINE__)))
-#define JS_UNLOCK_SCOPE(cx,scope) ((scope)->ownercx == (cx) ? (void)0 : \
- js_UnlockScope(cx, scope))
-#define JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope) \
- js_TransferScopeLock(cx, scope, newscope)
-
-extern jsword js_CurrentThreadId();
-extern void js_LockRuntime(JSRuntime *rt);
-extern void js_UnlockRuntime(JSRuntime *rt);
-extern void js_LockObj(JSContext *cx, JSObject *obj);
-extern void js_UnlockObj(JSContext *cx, JSObject *obj);
-extern void js_LockScope(JSContext *cx, JSScope *scope);
-extern void js_UnlockScope(JSContext *cx, JSScope *scope);
-extern int js_SetupLocks(int,int);
-extern void js_CleanupLocks();
-extern void js_InitContextForLocking(JSContext *);
-extern void js_TransferScopeLock(JSContext *, JSScope *, JSScope *);
-extern JS_FRIEND_API(jsval)
-js_GetSlotThreadSafe(JSContext *, JSObject *, uint32);
-extern void js_SetSlotThreadSafe(JSContext *, JSObject *, uint32, jsval);
-extern void js_InitLock(JSThinLock *);
-extern void js_FinishLock(JSThinLock *);
-extern void js_FinishSharingScope(JSRuntime *rt, JSScope *scope);
-
-#ifdef DEBUG
-
-#define JS_IS_RUNTIME_LOCKED(rt) js_IsRuntimeLocked(rt)
-#define JS_IS_OBJ_LOCKED(cx,obj) js_IsObjLocked(cx,obj)
-#define JS_IS_SCOPE_LOCKED(cx,scope) js_IsScopeLocked(cx,scope)
-
-extern JSBool js_IsRuntimeLocked(JSRuntime *rt);
-extern JSBool js_IsObjLocked(JSContext *cx, JSObject *obj);
-extern JSBool js_IsScopeLocked(JSContext *cx, JSScope *scope);
-
-#else
-
-#define JS_IS_RUNTIME_LOCKED(rt) 0
-#define JS_IS_OBJ_LOCKED(cx,obj) 1
-#define JS_IS_SCOPE_LOCKED(cx,scope) 1
-
-#endif /* DEBUG */
-
-#define JS_LOCK_OBJ_VOID(cx, obj, e) \
- JS_BEGIN_MACRO \
- JS_LOCK_OBJ(cx, obj); \
- e; \
- JS_UNLOCK_OBJ(cx, obj); \
- JS_END_MACRO
-
-#define JS_LOCK_VOID(cx, e) \
- JS_BEGIN_MACRO \
- JSRuntime *_rt = (cx)->runtime; \
- JS_LOCK_RUNTIME_VOID(_rt, e); \
- JS_END_MACRO
-
-#if defined(JS_USE_ONLY_NSPR_LOCKS) || \
- !( (defined(_WIN32) && defined(_M_IX86)) || \
- (defined(__GNUC__) && defined(__i386__)) || \
- (defined(SOLARIS) && defined(sparc) && defined(ULTRA_SPARC)) || \
- defined(AIX) )
-
-#define NSPR_LOCK 1
-
-#undef JS_LOCK0
-#undef JS_UNLOCK0
-#define JS_LOCK0(P,M) (JS_ACQUIRE_LOCK(((JSLock*)(P)->fat)), (P)->owner = (M))
-#define JS_UNLOCK0(P,M) ((P)->owner = 0, JS_RELEASE_LOCK(((JSLock*)(P)->fat)))
-
-#else /* arch-tests */
-
-#undef NSPR_LOCK
-
-extern JS_INLINE void js_Lock(JSThinLock *tl, jsword me);
-extern JS_INLINE void js_Unlock(JSThinLock *tl, jsword me);
-
-#endif /* arch-tests */
-
-#else /* !JS_THREADSAFE */
-
-#define JS_ATOMIC_INCREMENT(p) (++*(p))
-#define JS_ATOMIC_DECREMENT(p) (--*(p))
-#define JS_ATOMIC_ADD(p,v) (*(p) += (v))
-
-#define JS_CurrentThreadId() 0
-#define JS_NEW_LOCK() NULL
-#define JS_DESTROY_LOCK(l) ((void)0)
-#define JS_ACQUIRE_LOCK(l) ((void)0)
-#define JS_RELEASE_LOCK(l) ((void)0)
-#define JS_LOCK0(P,M) ((void)0)
-#define JS_UNLOCK0(P,M) ((void)0)
-
-#define JS_NEW_CONDVAR(l) NULL
-#define JS_DESTROY_CONDVAR(cv) ((void)0)
-#define JS_WAIT_CONDVAR(cv,to) ((void)0)
-#define JS_NOTIFY_CONDVAR(cv) ((void)0)
-#define JS_NOTIFY_ALL_CONDVAR(cv) ((void)0)
-
-#define JS_LOCK_RUNTIME(rt) ((void)0)
-#define JS_UNLOCK_RUNTIME(rt) ((void)0)
-#define JS_LOCK_OBJ(cx,obj) ((void)0)
-#define JS_UNLOCK_OBJ(cx,obj) ((void)0)
-#define JS_LOCK_OBJ_VOID(cx,obj,e) (e)
-#define JS_LOCK_SCOPE(cx,scope) ((void)0)
-#define JS_UNLOCK_SCOPE(cx,scope) ((void)0)
-#define JS_TRANSFER_SCOPE_LOCK(c,o,n) ((void)0)
-
-#define JS_IS_RUNTIME_LOCKED(rt) 1
-#define JS_IS_OBJ_LOCKED(cx,obj) 1
-#define JS_IS_SCOPE_LOCKED(cx,scope) 1
-#define JS_LOCK_VOID(cx, e) JS_LOCK_RUNTIME_VOID((cx)->runtime, e)
-
-#endif /* !JS_THREADSAFE */
-
-#define JS_LOCK_RUNTIME_VOID(rt,e) \
- JS_BEGIN_MACRO \
- JS_LOCK_RUNTIME(rt); \
- e; \
- JS_UNLOCK_RUNTIME(rt); \
- JS_END_MACRO
-
-#define JS_LOCK_GC(rt) JS_ACQUIRE_LOCK((rt)->gcLock)
-#define JS_UNLOCK_GC(rt) JS_RELEASE_LOCK((rt)->gcLock)
-#define JS_LOCK_GC_VOID(rt,e) (JS_LOCK_GC(rt), (e), JS_UNLOCK_GC(rt))
-#define JS_AWAIT_GC_DONE(rt) JS_WAIT_CONDVAR((rt)->gcDone, JS_NO_TIMEOUT)
-#define JS_NOTIFY_GC_DONE(rt) JS_NOTIFY_ALL_CONDVAR((rt)->gcDone)
-#define JS_AWAIT_REQUEST_DONE(rt) JS_WAIT_CONDVAR((rt)->requestDone, \
- JS_NO_TIMEOUT)
-#define JS_NOTIFY_REQUEST_DONE(rt) JS_NOTIFY_CONDVAR((rt)->requestDone)
-
-#define JS_LOCK(P,CX) JS_LOCK0(P,(CX)->thread)
-#define JS_UNLOCK(P,CX) JS_UNLOCK0(P,(CX)->thread)
-
-#ifndef SET_OBJ_INFO
-#define SET_OBJ_INFO(obj,f,l) ((void)0)
-#endif
-#ifndef SET_SCOPE_INFO
-#define SET_SCOPE_INFO(scope,f,l) ((void)0)
-#endif
-
-#endif /* jslock_h___ */