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Diffstat (limited to 'tools/node_modules/expresso/deps/jscoverage/js/jslock.h')
| -rw-r--r-- | tools/node_modules/expresso/deps/jscoverage/js/jslock.h | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/tools/node_modules/expresso/deps/jscoverage/js/jslock.h b/tools/node_modules/expresso/deps/jscoverage/js/jslock.h new file mode 100644 index 0000000..548e082 --- /dev/null +++ b/tools/node_modules/expresso/deps/jscoverage/js/jslock.h @@ -0,0 +1,311 @@ +/* -*- 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__ + +#include "jstypes.h" +#include "jsprvtd.h" /* for JSScope, etc. */ +#include "jspubtd.h" /* for JSRuntime, etc. */ + +#ifdef JS_THREADSAFE +# include "pratom.h" +# include "prlock.h" +# include "prcvar.h" +# include "prthread.h" +#endif + +JS_BEGIN_EXTERN_C + +#ifdef JS_THREADSAFE + +#if (defined(_WIN32) && defined(_M_IX86)) || \ + (defined(__GNUC__) && defined(__i386__)) || \ + (defined(__GNUC__) && defined(__x86_64__)) || \ + (defined(SOLARIS) && defined(sparc) && defined(ULTRA_SPARC)) || \ + defined(AIX) || \ + defined(USE_ARM_KUSER) +# define JS_HAS_NATIVE_COMPARE_AND_SWAP 1 +#else +# define JS_HAS_NATIVE_COMPARE_AND_SWAP 0 +#endif + +#if defined(JS_USE_ONLY_NSPR_LOCKS) || !JS_HAS_NATIVE_COMPARE_AND_SWAP +# define NSPR_LOCK 1 +#else +# undef NSPR_LOCK +#endif + +#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; + +typedef struct JSThinLock { + jsword owner; + JSFatLock *fat; +} JSThinLock; + +#define CX_THINLOCK_ID(cx) ((jsword)(cx)->thread) +#define CURRENT_THREAD_IS_ME(me) (((JSThread *)me)->id == js_CurrentThreadId()) + +typedef PRLock JSLock; + +typedef struct JSTitle JSTitle; + +struct JSTitle { + JSContext *ownercx; /* creating context, NULL if shared */ + JSThinLock lock; /* binary semaphore protecting title */ + union { /* union lockful and lock-free state: */ + jsrefcount count; /* lock entry count for reentrancy */ + JSTitle *link; /* next link in rt->titleSharingTodo */ + } u; +#ifdef JS_DEBUG_TITLE_LOCKS + const char *file[4]; /* file where lock was (re-)taken */ + unsigned int line[4]; /* line where lock was (re-)taken */ +#endif +}; + +/* + * Title structures must be immediately preceded by JSObjectMap structures for + * maps that use titles for threadsafety. This is enforced by assertion in + * jsscope.h; see bug 408416 for future remedies to this somewhat fragile + * architecture. + */ + +#define TITLE_TO_MAP(title) \ + ((JSObjectMap *)((char *)(title) - sizeof(JSObjectMap))) + +/* + * 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 js_CurrentThreadId() (jsword)PR_GetCurrentThread() +#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_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 JS_DEBUG_TITLE_LOCKS + +#define SET_OBJ_INFO(obj_, file_, line_) \ + SET_SCOPE_INFO(OBJ_SCOPE(obj_), file_, line_) + +#define SET_SCOPE_INFO(scope_, file_, line_) \ + js_SetScopeInfo(scope_, file_, line_) + +#endif + +#define JS_LOCK(cx, tl) js_Lock(cx, tl) +#define JS_UNLOCK(cx, tl) js_Unlock(cx, tl) + +#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)->title.ownercx == (cx)) \ + ? (void)0 \ + : (js_LockObj(cx, obj), \ + SET_OBJ_INFO(obj,__FILE__,__LINE__))) +#define JS_UNLOCK_OBJ(cx,obj) ((OBJ_SCOPE(obj)->title.ownercx == (cx)) \ + ? (void)0 : js_UnlockObj(cx, obj)) + +#define JS_LOCK_TITLE(cx,title) \ + ((title)->ownercx == (cx) ? (void)0 \ + : (js_LockTitle(cx, (title)), \ + SET_TITLE_INFO(title,__FILE__,__LINE__))) + +#define JS_UNLOCK_TITLE(cx,title) ((title)->ownercx == (cx) ? (void)0 \ + : js_UnlockTitle(cx, title)) + +#define JS_LOCK_SCOPE(cx,scope) JS_LOCK_TITLE(cx,&(scope)->title) +#define JS_UNLOCK_SCOPE(cx,scope) JS_UNLOCK_TITLE(cx,&(scope)->title) + +#define JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope) \ + js_TransferTitle(cx, &scope->title, &newscope->title) + + +extern void js_Lock(JSContext *cx, JSThinLock *tl); +extern void js_Unlock(JSContext *cx, JSThinLock *tl); +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_InitTitle(JSContext *cx, JSTitle *title); +extern void js_FinishTitle(JSContext *cx, JSTitle *title); +extern void js_LockTitle(JSContext *cx, JSTitle *title); +extern void js_UnlockTitle(JSContext *cx, JSTitle *title); +extern int js_SetupLocks(int,int); +extern void js_CleanupLocks(); +extern void js_TransferTitle(JSContext *, JSTitle *, JSTitle *); +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_FinishSharingTitle(JSContext *cx, JSTitle *title); + +#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_TITLE_LOCKED(cx,title) js_IsTitleLocked(cx,title) + +extern JSBool js_IsRuntimeLocked(JSRuntime *rt); +extern JSBool js_IsObjLocked(JSContext *cx, JSObject *obj); +extern JSBool js_IsTitleLocked(JSContext *cx, JSTitle *title); +#ifdef JS_DEBUG_TITLE_LOCKS +extern void js_SetScopeInfo(JSScope *scope, const char *file, int line); +#endif + +#else + +#define JS_IS_RUNTIME_LOCKED(rt) 0 +#define JS_IS_OBJ_LOCKED(cx,obj) 1 +#define JS_IS_TITLE_LOCKED(cx,title) 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 + +#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_LOCK(cx, tl) ((void)0) +#define JS_UNLOCK(cx, tl) ((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_TITLE_LOCKED(cx,title) 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) + +#ifndef SET_OBJ_INFO +#define SET_OBJ_INFO(obj,f,l) ((void)0) +#endif +#ifndef SET_TITLE_INFO +#define SET_TITLE_INFO(title,f,l) ((void)0) +#endif + +#ifdef JS_THREADSAFE + +extern JSBool +js_CompareAndSwap(jsword *w, jsword ov, jsword nv); + +#else + +static inline JSBool +js_CompareAndSwap(jsword *w, jsword ov, jsword nv) +{ + return (*w == ov) ? *w = nv, JS_TRUE : JS_FALSE; +} + +#endif + +JS_END_EXTERN_C + +#endif /* jslock_h___ */ |