230 lines
8.7 KiB
C
230 lines
8.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* 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
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#ifndef jslock_h__
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#define jslock_h__
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#ifdef JS_THREADSAFE
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#include "jstypes.h"
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#include "prlock.h"
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#include "prcvar.h"
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#include "jshash.h" /* Added by JSIFY */
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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 {
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int susp;
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PRLock* slock;
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PRCondVar* svar;
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struct JSFatLock *next;
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struct JSFatLock *prev;
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} 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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typedef PRLock JSLock;
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typedef struct JSFatLockTable {
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JSFatLock *free;
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JSFatLock *taken;
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} JSFatLockTable;
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#define JS_ATOMIC_ADDREF(p, i) js_AtomicAdd(p,i)
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#define CurrentThreadId() (jsword)PR_GetCurrentThread()
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#define JS_CurrentThreadId() js_CurrentThreadId()
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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_LOCK0(P,M) js_Lock(P,M)
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#define JS_UNLOCK0(P,M) js_Unlock(P,M)
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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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#ifdef DEBUG
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#include "jsscope.h"
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#define _SET_OBJ_INFO(obj,f,l) \
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_SET_SCOPE_INFO(OBJ_SCOPE(obj),f,l)
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#define _SET_SCOPE_INFO(scope,f,l) \
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(JS_ASSERT(scope->count > 0 && scope->count <= 4), \
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scope->file[scope->count-1] = f, \
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scope->line[scope->count-1] = l)
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#endif /* DEBUG */
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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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#define JS_LOCK_OBJ(cx,obj) (js_LockObj(cx, obj), \
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_SET_OBJ_INFO(obj,__FILE__,__LINE__))
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#define JS_UNLOCK_OBJ(cx,obj) js_UnlockObj(cx, obj)
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#define JS_LOCK_SCOPE(cx,scope) (js_LockScope(cx, scope), \
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_SET_SCOPE_INFO(scope,__FILE__,__LINE__))
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#define JS_UNLOCK_SCOPE(cx,scope) js_UnlockScope(cx, scope)
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#define JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope) js_TransferScopeLock(cx, scope, newscope)
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extern jsword js_CurrentThreadId();
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extern JS_INLINE void js_Lock(JSThinLock *, jsword);
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extern JS_INLINE void js_Unlock(JSThinLock *, jsword);
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extern int js_CompareAndSwap(jsword *, jsword, jsword);
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extern void js_AtomicAdd(jsword*, jsword);
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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 void js_LockObj(JSContext *cx, JSObject *obj);
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extern void js_UnlockObj(JSContext *cx, JSObject *obj);
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extern void js_LockScope(JSContext *cx, JSScope *scope);
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extern void js_UnlockScope(JSContext *cx, JSScope *scope);
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extern int js_SetupLocks(int,int);
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extern void js_CleanupLocks();
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extern JS_PUBLIC_API(void) js_InitContextForLocking(JSContext *);
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extern void js_TransferScopeLock(JSContext *, JSScope *, JSScope *);
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extern JS_PUBLIC_API(jsval) js_GetSlotWhileLocked(JSContext *, JSObject *, uint32);
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extern JS_PUBLIC_API(void) js_SetSlotWhileLocked(JSContext *, JSObject *, uint32, jsval);
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extern void js_NewLock(JSThinLock *);
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extern void js_DestroyLock(JSThinLock *);
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#ifdef DEBUG
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#define JS_IS_RUNTIME_LOCKED(rt) js_IsRuntimeLocked(rt)
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#define JS_IS_OBJ_LOCKED(obj) js_IsObjLocked(obj)
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#define JS_IS_SCOPE_LOCKED(scope) js_IsScopeLocked(scope)
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extern JSBool js_IsRuntimeLocked(JSRuntime *rt);
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extern JSBool js_IsObjLocked(JSObject *obj);
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extern JSBool js_IsScopeLocked(JSScope *scope);
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#else
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#define JS_IS_RUNTIME_LOCKED(rt) 0
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#define JS_IS_OBJ_LOCKED(obj) 1
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#define JS_IS_SCOPE_LOCKED(scope) 1
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#endif /* DEBUG */
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#define JS_LOCK_OBJ_VOID(cx, obj, e) \
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JS_BEGIN_MACRO \
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js_LockObj(cx, obj); \
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e; \
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js_UnlockObj(cx, obj); \
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JS_END_MACRO
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#define JS_LOCK_VOID(cx, e) \
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JS_BEGIN_MACRO \
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JSRuntime *_rt = (cx)->runtime; \
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JS_LOCK_RUNTIME_VOID(_rt, e); \
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JS_END_MACRO
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#if defined(JS_USE_ONLY_NSPR_LOCKS) || !(defined(_WIN32) || defined(SOLARIS) || defined(AIX))
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#undef JS_LOCK0
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#undef JS_UNLOCK0
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#define JS_LOCK0(P,M) JS_ACQUIRE_LOCK(((JSLock*)(P)->fat)); (P)->owner = (M)
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#define JS_UNLOCK0(P,M) (P)->owner = 0; JS_RELEASE_LOCK(((JSLock*)(P)->fat))
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#define NSPR_LOCK 1
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#endif /* arch-tests */
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#else /* !JS_THREADSAFE */
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#define JS_ATOMIC_ADDREF(p,i) (*(p) += i)
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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_LOCK0(P,M) ((void)0)
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#define JS_UNLOCK0(P,M) ((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_LOCK_OBJ(cx,obj) ((void)0)
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#define JS_UNLOCK_OBJ(cx,obj) ((void)0)
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#define JS_LOCK_OBJ_VOID(cx,obj,e) (e)
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#define JS_LOCK_SCOPE(cx,scope) ((void)0)
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#define JS_UNLOCK_SCOPE(cx,scope) ((void)0)
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#define JS_TRANSFER_SCOPE_LOCK(c,o,n) ((void)0)
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#define JS_IS_RUNTIME_LOCKED(rt) 1
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#define JS_IS_OBJ_LOCKED(obj) 1
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#define JS_IS_SCOPE_LOCKED(scope) 1
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#define JS_LOCK_VOID(cx, e) JS_LOCK_RUNTIME_VOID((cx)->runtime, e)
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#endif /* !JS_THREADSAFE */
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#define JS_LOCK_RUNTIME_VOID(rt,e) \
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JS_BEGIN_MACRO \
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JS_LOCK_RUNTIME(rt); \
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e; \
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JS_UNLOCK_RUNTIME(rt); \
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JS_END_MACRO
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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_LOCK_GC_VOID(rt,e) (JS_LOCK_GC(rt), (e), JS_UNLOCK_GC(rt))
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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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#define JS_LOCK(P,CX) JS_LOCK0(P,(CX)->thread)
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#define JS_UNLOCK(P,CX) JS_UNLOCK0(P,(CX)->thread)
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#ifndef _SET_OBJ_INFO
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#define _SET_OBJ_INFO(obj,f,l) ((void)0)
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#endif
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#ifndef _SET_SCOPE_INFO
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#define _SET_SCOPE_INFO(scope,f,l) ((void)0)
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#endif
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#endif /* jslock_h___ */
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