mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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0319982d42
--HG-- extra : rebase_source : 78ec31e4236f63f8a91024f34b1b99a889dc47f5
253 lines
8.0 KiB
C++
253 lines
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef jslock_h__
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#define jslock_h__
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#include "jstypes.h"
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#include "jsapi.h"
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#include "jsprvtd.h"
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#ifdef JS_THREADSAFE
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# include "pratom.h"
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# include "prlock.h"
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# include "prcvar.h"
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# include "prthread.h"
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#endif
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#ifdef JS_THREADSAFE
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#if (defined(_WIN32) && defined(_M_IX86)) || \
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(defined(_WIN64) && (defined(_M_AMD64) || defined(_M_X64))) || \
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(defined(__i386) && (defined(__GNUC__) || defined(__SUNPRO_CC))) || \
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(defined(__x86_64) && (defined(__GNUC__) || defined(__SUNPRO_CC))) || \
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(defined(__sparc) && (defined(__GNUC__) || defined(__SUNPRO_CC))) || \
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(defined(__arm__) && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) || \
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defined(AIX) || \
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defined(USE_ARM_KUSER)
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# define JS_HAS_NATIVE_COMPARE_AND_SWAP 1
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#else
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# define JS_HAS_NATIVE_COMPARE_AND_SWAP 0
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#endif
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#if defined(JS_USE_ONLY_NSPR_LOCKS) || !JS_HAS_NATIVE_COMPARE_AND_SWAP
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# define NSPR_LOCK 1
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#else
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# undef NSPR_LOCK
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#endif
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#define Thin_GetWait(W) ((jsword)(W) & 0x1)
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#define Thin_SetWait(W) ((jsword)(W) | 0x1)
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#define Thin_RemoveWait(W) ((jsword)(W) & ~0x1)
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typedef struct JSFatLock JSFatLock;
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typedef struct JSThinLock {
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jsword owner;
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JSFatLock *fat;
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} JSThinLock;
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#define CX_THINLOCK_ID(cx) ((jsword)(cx)->thread())
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#define CURRENT_THREAD_IS_ME(me) (((JSThread *)me)->id == js_CurrentThreadId())
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typedef PRLock JSLock;
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/*
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* Atomic increment and decrement for a reference counter, given jsrefcount *p.
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* NB: jsrefcount is int32, aka PRInt32, so that pratom.h functions work.
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*/
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#define JS_ATOMIC_INCREMENT(p) PR_ATOMIC_INCREMENT((PRInt32 *)(p))
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#define JS_ATOMIC_DECREMENT(p) PR_ATOMIC_DECREMENT((PRInt32 *)(p))
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#define JS_ATOMIC_ADD(p,v) PR_ATOMIC_ADD((PRInt32 *)(p), (PRInt32)(v))
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#define JS_ATOMIC_SET(p,v) PR_ATOMIC_SET((PRInt32 *)(p), (PRInt32)(v))
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#define js_CurrentThreadId() PR_GetCurrentThread()
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#define JS_NEW_LOCK() PR_NewLock()
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#define JS_DESTROY_LOCK(l) PR_DestroyLock(l)
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#define JS_ACQUIRE_LOCK(l) PR_Lock(l)
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#define JS_RELEASE_LOCK(l) PR_Unlock(l)
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#define JS_NEW_CONDVAR(l) PR_NewCondVar(l)
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#define JS_DESTROY_CONDVAR(cv) PR_DestroyCondVar(cv)
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#define JS_WAIT_CONDVAR(cv,to) PR_WaitCondVar(cv,to)
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#define JS_NO_TIMEOUT PR_INTERVAL_NO_TIMEOUT
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#define JS_NOTIFY_CONDVAR(cv) PR_NotifyCondVar(cv)
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#define JS_NOTIFY_ALL_CONDVAR(cv) PR_NotifyAllCondVar(cv)
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#define JS_LOCK(cx, tl) js_Lock(cx, tl)
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#define JS_UNLOCK(cx, tl) js_Unlock(cx, tl)
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#define JS_LOCK_RUNTIME(rt) js_LockRuntime(rt)
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#define JS_UNLOCK_RUNTIME(rt) js_UnlockRuntime(rt)
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extern void js_Lock(JSContext *cx, JSThinLock *tl);
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extern void js_Unlock(JSContext *cx, JSThinLock *tl);
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extern void js_LockRuntime(JSRuntime *rt);
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extern void js_UnlockRuntime(JSRuntime *rt);
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extern int js_SetupLocks(int,int);
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extern void js_CleanupLocks();
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extern void js_InitLock(JSThinLock *);
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extern void js_FinishLock(JSThinLock *);
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#ifdef DEBUG
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#define JS_IS_RUNTIME_LOCKED(rt) js_IsRuntimeLocked(rt)
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extern JSBool js_IsRuntimeLocked(JSRuntime *rt);
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#else
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#define JS_IS_RUNTIME_LOCKED(rt) 0
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#endif /* DEBUG */
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#else /* !JS_THREADSAFE */
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#define JS_ATOMIC_INCREMENT(p) (++*(p))
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#define JS_ATOMIC_DECREMENT(p) (--*(p))
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#define JS_ATOMIC_ADD(p,v) (*(p) += (v))
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#define JS_ATOMIC_SET(p,v) (*(p) = (v))
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#define js_CurrentThreadId() 0
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#define JS_NEW_LOCK() NULL
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#define JS_DESTROY_LOCK(l) ((void)0)
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#define JS_ACQUIRE_LOCK(l) ((void)0)
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#define JS_RELEASE_LOCK(l) ((void)0)
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#define JS_LOCK(cx, tl) ((void)0)
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#define JS_UNLOCK(cx, tl) ((void)0)
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#define JS_NEW_CONDVAR(l) NULL
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#define JS_DESTROY_CONDVAR(cv) ((void)0)
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#define JS_WAIT_CONDVAR(cv,to) ((void)0)
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#define JS_NOTIFY_CONDVAR(cv) ((void)0)
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#define JS_NOTIFY_ALL_CONDVAR(cv) ((void)0)
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#define JS_LOCK_RUNTIME(rt) ((void)0)
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#define JS_UNLOCK_RUNTIME(rt) ((void)0)
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#define JS_IS_RUNTIME_LOCKED(rt) 1
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#endif /* !JS_THREADSAFE */
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#define JS_LOCK_GC(rt) JS_ACQUIRE_LOCK((rt)->gcLock)
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#define JS_UNLOCK_GC(rt) JS_RELEASE_LOCK((rt)->gcLock)
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#define JS_AWAIT_GC_DONE(rt) JS_WAIT_CONDVAR((rt)->gcDone, JS_NO_TIMEOUT)
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#define JS_NOTIFY_GC_DONE(rt) JS_NOTIFY_ALL_CONDVAR((rt)->gcDone)
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#define JS_AWAIT_REQUEST_DONE(rt) JS_WAIT_CONDVAR((rt)->requestDone, \
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JS_NO_TIMEOUT)
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#define JS_NOTIFY_REQUEST_DONE(rt) JS_NOTIFY_CONDVAR((rt)->requestDone)
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#ifndef JS_SET_OBJ_INFO
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#define JS_SET_OBJ_INFO(obj,f,l) ((void)0)
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#endif
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#ifndef JS_SET_TITLE_INFO
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#define JS_SET_TITLE_INFO(title,f,l) ((void)0)
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#endif
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#ifdef JS_THREADSAFE
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extern JSBool
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js_CompareAndSwap(volatile jsword *w, jsword ov, jsword nv);
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/* Atomically bitwise-or the mask into the word *w using compare and swap. */
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extern void
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js_AtomicSetMask(volatile jsword *w, jsword mask);
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/*
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* Atomically bitwise-and the complement of the mask into the word *w using
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* compare and swap.
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*/
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extern void
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js_AtomicClearMask(volatile jsword *w, jsword mask);
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#define JS_ATOMIC_SET_MASK(w, mask) js_AtomicSetMask(w, mask)
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#define JS_ATOMIC_CLEAR_MASK(w, mask) js_AtomicClearMask(w, mask)
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#else
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static inline JSBool
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js_CompareAndSwap(jsword *w, jsword ov, jsword nv)
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{
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return (*w == ov) ? *w = nv, JS_TRUE : JS_FALSE;
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}
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#define JS_ATOMIC_SET_MASK(w, mask) (*(w) |= (mask))
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#define JS_ATOMIC_CLEAR_MASK(w, mask) (*(w) &= ~(mask))
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#endif
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#ifdef __cplusplus
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namespace js {
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#ifdef JS_THREADSAFE
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class AutoLock {
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private:
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JSLock *lock;
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public:
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AutoLock(JSLock *lock) : lock(lock) { JS_ACQUIRE_LOCK(lock); }
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~AutoLock() { JS_RELEASE_LOCK(lock); }
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};
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# define JS_AUTO_LOCK_GUARD(name, l) AutoLock name((l));
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#else
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# define JS_AUTO_LOCK_GUARD(name, l)
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#endif
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class AutoAtomicIncrement {
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int32 *p;
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JS_DECL_USE_GUARD_OBJECT_NOTIFIER
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public:
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AutoAtomicIncrement(int32 *p JS_GUARD_OBJECT_NOTIFIER_PARAM)
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: p(p) {
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JS_GUARD_OBJECT_NOTIFIER_INIT;
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JS_ATOMIC_INCREMENT(p);
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}
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~AutoAtomicIncrement() {
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JS_ATOMIC_DECREMENT(p);
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}
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};
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} /* namespace js */
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#endif
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#endif /* jslock_h___ */
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