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gecko-dev/js/ref/jslock.h
fur 6b433caaaa (This code is not built by any flavor of Navigator) 
Initial check-in to mozilla tree: JSRef development is migrating from
JSFUN13_BRANCH of /m/src repository to /m/pub
1998-04-24 01:35:13 +00:00

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8.0 KiB
C
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef jslock_h__
#define jslock_h__
#ifdef JS_THREADSAFE
#include "prtypes.h"
#include "prlock.h"
#include "prcvar.h"
#include "prhash.h"
#define Thin_GetWait(W) ((prword)(W) & 0x1)
#define Thin_SetWait(W) ((prword)(W) | 0x1)
#define Thin_RemoveWait(W) ((prword)(W) & ~0x1)
typedef struct JSFatLock {
int susp;
PRLock* slock;
PRCondVar* svar;
struct JSFatLock *next;
struct JSFatLock *prev;
} JSFatLock;
typedef struct JSThinLock {
prword owner;
JSFatLock *fat;
} JSThinLock;
typedef PRLock JSLock;
typedef struct JSFatLockTable {
JSFatLock *free;
JSFatLock *taken;
} JSFatLockTable;
#define JS_ATOMIC_ADDREF(p, i) js_AtomicAdd(p,i)
#define CurrentThreadId() (prword)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)
#ifdef DEBUG
#include "jsscope.h"
#define _SET_OBJ_INFO(obj,f,l) \
_SET_SCOPE_INFO(((JSScope*)obj->map),f,l)
#define _SET_SCOPE_INFO(scope,f,l) \
(PR_ASSERT(scope->count > 0 && scope->count <= 4), \
scope->file[scope->count-1] = f, \
scope->line[scope->count-1] = l)
#endif /* DEBUG */
#define JS_LOCK_RUNTIME(rt) js_LockRuntime(rt)
#define JS_UNLOCK_RUNTIME(rt) js_UnlockRuntime(rt)
#define JS_LOCK_OBJ(cx,obj) (js_LockObj(cx, obj), \
_SET_OBJ_INFO(obj,__FILE__,__LINE__))
#define JS_UNLOCK_OBJ(cx,obj) js_UnlockObj(cx, obj)
#define JS_LOCK_SCOPE(cx,scope) (js_LockScope(cx, scope), \
_SET_SCOPE_INFO(scope,__FILE__,__LINE__))
#define JS_UNLOCK_SCOPE(cx,scope) js_UnlockScope(cx, scope)
#define JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope) js_TransferScopeLock(cx, scope, newscope)
extern prword js_CurrentThreadId();
extern PR_INLINE void js_Lock(JSThinLock *, prword);
extern PR_INLINE void js_Unlock(JSThinLock *, prword);
extern int js_CompareAndSwap(prword *, prword, prword);
extern void js_AtomicAdd(prword*, prword);
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 JS_PUBLIC_API(int) js_SetupLocks(int);
extern JS_PUBLIC_API(void) js_CleanupLocks();
extern JS_PUBLIC_API(void) js_InitContextForLocking(JSContext *);
extern void js_TransferScopeLock(JSContext *, JSScope *, JSScope *);
extern JS_PUBLIC_API(jsval) js_GetSlotWhileLocked(JSContext *, JSObject *, uint32);
extern JS_PUBLIC_API(void) js_SetSlotWhileLocked(JSContext *, JSObject *, uint32, jsval);
extern void js_NewLock(JSThinLock *);
extern void js_DestroyLock(JSThinLock *);
#ifdef DEBUG
#define JS_IS_RUNTIME_LOCKED(rt) js_IsRuntimeLocked(rt)
#define JS_IS_OBJ_LOCKED(obj) js_IsObjLocked(obj)
#define JS_IS_SCOPE_LOCKED(scope) js_IsScopeLocked(scope)
extern JSBool js_IsRuntimeLocked(JSRuntime *rt);
extern JSBool js_IsObjLocked(JSObject *obj);
extern JSBool js_IsScopeLocked(JSScope *scope);
#else
#define JS_IS_RUNTIME_LOCKED(rt) 0
#define JS_IS_OBJ_LOCKED(obj) 1
#define JS_IS_SCOPE_LOCKED(scope) 1
#endif /* DEBUG */
#define JS_LOCK_OBJ_VOID(cx, obj, e) \
PR_BEGIN_MACRO \
js_LockObj(cx, obj); \
e; \
js_UnlockObj(cx, obj); \
PR_END_MACRO
#define JS_LOCK_VOID(cx, e) \
PR_BEGIN_MACRO \
JSRuntime *_rt = (cx)->runtime; \
JS_LOCK_RUNTIME_VOID(_rt, e); \
PR_END_MACRO
#if defined(JS_ONLY_NSPR_LOCKS) || !(defined(_WIN32) || defined(SOLARIS) || defined(AIX))
#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))
#define NSPR_LOCK 1
#endif /* arch-tests */
#else /* !JS_THREADSAFE */
#define JS_ATOMIC_ADDREF(p,i) (*(p) += i)
#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(obj) 1
#define JS_IS_SCOPE_LOCKED(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) \
PR_BEGIN_MACRO \
JS_LOCK_RUNTIME(rt); \
e; \
JS_UNLOCK_RUNTIME(rt); \
PR_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___ */
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