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1.1 ! root 1: /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- ! 2: * ! 3: * ***** BEGIN LICENSE BLOCK ***** ! 4: * Version: MPL 1.1/GPL 2.0/LGPL 2.1 ! 5: * ! 6: * The contents of this file are subject to the Mozilla Public License Version ! 7: * 1.1 (the "License"); you may not use this file except in compliance with ! 8: * the License. You may obtain a copy of the License at ! 9: * http://www.mozilla.org/MPL/ ! 10: * ! 11: * Software distributed under the License is distributed on an "AS IS" basis, ! 12: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License ! 13: * for the specific language governing rights and limitations under the ! 14: * License. ! 15: * ! 16: * The Original Code is Mozilla Communicator client code, released ! 17: * March 31, 1998. ! 18: * ! 19: * The Initial Developer of the Original Code is ! 20: * Netscape Communications Corporation. ! 21: * Portions created by the Initial Developer are Copyright (C) 1998 ! 22: * the Initial Developer. All Rights Reserved. ! 23: * ! 24: * Contributor(s): ! 25: * ! 26: * Alternatively, the contents of this file may be used under the terms of ! 27: * either of the GNU General Public License Version 2 or later (the "GPL"), ! 28: * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), ! 29: * in which case the provisions of the GPL or the LGPL are applicable instead ! 30: * of those above. If you wish to allow use of your version of this file only ! 31: * under the terms of either the GPL or the LGPL, and not to allow others to ! 32: * use your version of this file under the terms of the MPL, indicate your ! 33: * decision by deleting the provisions above and replace them with the notice ! 34: * and other provisions required by the GPL or the LGPL. If you do not delete ! 35: * the provisions above, a recipient may use your version of this file under ! 36: * the terms of any one of the MPL, the GPL or the LGPL. ! 37: * ! 38: * ***** END LICENSE BLOCK ***** */ ! 39: #ifndef jslock_h__ ! 40: #define jslock_h__ ! 41: ! 42: #ifdef JS_THREADSAFE ! 43: ! 44: #include "jstypes.h" ! 45: #include "pratom.h" ! 46: #include "prlock.h" ! 47: #include "prcvar.h" ! 48: ! 49: #include "jsprvtd.h" /* for JSScope, etc. */ ! 50: #include "jspubtd.h" /* for JSRuntime, etc. */ ! 51: ! 52: #define Thin_GetWait(W) ((jsword)(W) & 0x1) ! 53: #define Thin_SetWait(W) ((jsword)(W) | 0x1) ! 54: #define Thin_RemoveWait(W) ((jsword)(W) & ~0x1) ! 55: ! 56: typedef struct JSFatLock JSFatLock; ! 57: ! 58: struct JSFatLock { ! 59: int susp; ! 60: PRLock *slock; ! 61: PRCondVar *svar; ! 62: JSFatLock *next; ! 63: JSFatLock **prevp; ! 64: }; ! 65: ! 66: typedef struct JSThinLock { ! 67: jsword owner; ! 68: JSFatLock *fat; ! 69: } JSThinLock; ! 70: ! 71: typedef PRLock JSLock; ! 72: ! 73: typedef struct JSFatLockTable { ! 74: JSFatLock *free; ! 75: JSFatLock *taken; ! 76: } JSFatLockTable; ! 77: ! 78: /* ! 79: * Atomic increment and decrement for a reference counter, given jsrefcount *p. ! 80: * NB: jsrefcount is int32, aka PRInt32, so that pratom.h functions work. ! 81: */ ! 82: #define JS_ATOMIC_INCREMENT(p) PR_AtomicIncrement((PRInt32 *)(p)) ! 83: #define JS_ATOMIC_DECREMENT(p) PR_AtomicDecrement((PRInt32 *)(p)) ! 84: #define JS_ATOMIC_ADD(p,v) PR_AtomicAdd((PRInt32 *)(p), (PRInt32)(v)) ! 85: ! 86: #define CurrentThreadId() (jsword)PR_GetCurrentThread() ! 87: #define JS_CurrentThreadId() js_CurrentThreadId() ! 88: #define JS_NEW_LOCK() PR_NewLock() ! 89: #define JS_DESTROY_LOCK(l) PR_DestroyLock(l) ! 90: #define JS_ACQUIRE_LOCK(l) PR_Lock(l) ! 91: #define JS_RELEASE_LOCK(l) PR_Unlock(l) ! 92: #define JS_LOCK0(P,M) js_Lock(P,M) ! 93: #define JS_UNLOCK0(P,M) js_Unlock(P,M) ! 94: ! 95: #define JS_NEW_CONDVAR(l) PR_NewCondVar(l) ! 96: #define JS_DESTROY_CONDVAR(cv) PR_DestroyCondVar(cv) ! 97: #define JS_WAIT_CONDVAR(cv,to) PR_WaitCondVar(cv,to) ! 98: #define JS_NO_TIMEOUT PR_INTERVAL_NO_TIMEOUT ! 99: #define JS_NOTIFY_CONDVAR(cv) PR_NotifyCondVar(cv) ! 100: #define JS_NOTIFY_ALL_CONDVAR(cv) PR_NotifyAllCondVar(cv) ! 101: ! 102: /* ! 103: * Include jsscope.h so JS_LOCK_OBJ macro callers don't have to include it. ! 104: * Since there is a JSThinLock member in JSScope, we can't nest this include ! 105: * much earlier (see JSThinLock's typedef, above). Yes, that means there is ! 106: * an #include cycle between jslock.h and jsscope.h: moderate-sized XXX here, ! 107: * to be fixed by moving JS_LOCK_SCOPE to jsscope.h, JS_LOCK_OBJ to jsobj.h, ! 108: * and so on. ! 109: * ! 110: * We also need jsscope.h #ifdef DEBUG for SET_OBJ_INFO and SET_SCOPE_INFO, ! 111: * but we do not want any nested includes that depend on DEBUG. Those lead ! 112: * to build bustage when someone makes a change that depends in a subtle way ! 113: * on jsscope.h being included directly or indirectly, but does not test by ! 114: * building optimized as well as DEBUG. ! 115: */ ! 116: #include "jsscope.h" ! 117: ! 118: #ifdef DEBUG ! 119: ! 120: #define SET_OBJ_INFO(obj_,file_,line_) \ ! 121: SET_SCOPE_INFO(OBJ_SCOPE(obj_),file_,line_) ! 122: ! 123: #define SET_SCOPE_INFO(scope_,file_,line_) \ ! 124: ((scope_)->ownercx ? (void)0 : \ ! 125: (JS_ASSERT((0 < (scope_)->u.count && (scope_)->u.count <= 4) || \ ! 126: SCOPE_IS_SEALED(scope_)), \ ! 127: (void)((scope_)->file[(scope_)->u.count-1] = (file_), \ ! 128: (scope_)->line[(scope_)->u.count-1] = (line_)))) ! 129: #endif /* DEBUG */ ! 130: ! 131: #define JS_LOCK_RUNTIME(rt) js_LockRuntime(rt) ! 132: #define JS_UNLOCK_RUNTIME(rt) js_UnlockRuntime(rt) ! 133: ! 134: /* ! 135: * NB: The JS_LOCK_OBJ and JS_UNLOCK_OBJ macros work *only* on native objects ! 136: * (objects for which OBJ_IS_NATIVE returns true). All uses of these macros in ! 137: * the engine are predicated on OBJ_IS_NATIVE or equivalent checks. These uses ! 138: * are for optimizations above the JSObjectOps layer, under which object locks ! 139: * normally hide. ! 140: */ ! 141: #define JS_LOCK_OBJ(cx,obj) ((OBJ_SCOPE(obj)->ownercx == (cx)) \ ! 142: ? (void)0 \ ! 143: : (js_LockObj(cx, obj), \ ! 144: SET_OBJ_INFO(obj,__FILE__,__LINE__))) ! 145: #define JS_UNLOCK_OBJ(cx,obj) ((OBJ_SCOPE(obj)->ownercx == (cx)) \ ! 146: ? (void)0 : js_UnlockObj(cx, obj)) ! 147: ! 148: #define JS_LOCK_SCOPE(cx,scope) ((scope)->ownercx == (cx) ? (void)0 : \ ! 149: (js_LockScope(cx, scope), \ ! 150: SET_SCOPE_INFO(scope,__FILE__,__LINE__))) ! 151: #define JS_UNLOCK_SCOPE(cx,scope) ((scope)->ownercx == (cx) ? (void)0 : \ ! 152: js_UnlockScope(cx, scope)) ! 153: #define JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope) \ ! 154: js_TransferScopeLock(cx, scope, newscope) ! 155: ! 156: extern jsword js_CurrentThreadId(); ! 157: extern void js_LockRuntime(JSRuntime *rt); ! 158: extern void js_UnlockRuntime(JSRuntime *rt); ! 159: extern void js_LockObj(JSContext *cx, JSObject *obj); ! 160: extern void js_UnlockObj(JSContext *cx, JSObject *obj); ! 161: extern void js_LockScope(JSContext *cx, JSScope *scope); ! 162: extern void js_UnlockScope(JSContext *cx, JSScope *scope); ! 163: extern int js_SetupLocks(int,int); ! 164: extern void js_CleanupLocks(); ! 165: extern void js_InitContextForLocking(JSContext *); ! 166: extern void js_TransferScopeLock(JSContext *, JSScope *, JSScope *); ! 167: extern JS_FRIEND_API(jsval) ! 168: js_GetSlotThreadSafe(JSContext *, JSObject *, uint32); ! 169: extern void js_SetSlotThreadSafe(JSContext *, JSObject *, uint32, jsval); ! 170: extern void js_InitLock(JSThinLock *); ! 171: extern void js_FinishLock(JSThinLock *); ! 172: extern void js_FinishSharingScope(JSRuntime *rt, JSScope *scope); ! 173: ! 174: #ifdef DEBUG ! 175: ! 176: #define JS_IS_RUNTIME_LOCKED(rt) js_IsRuntimeLocked(rt) ! 177: #define JS_IS_OBJ_LOCKED(cx,obj) js_IsObjLocked(cx,obj) ! 178: #define JS_IS_SCOPE_LOCKED(cx,scope) js_IsScopeLocked(cx,scope) ! 179: ! 180: extern JSBool js_IsRuntimeLocked(JSRuntime *rt); ! 181: extern JSBool js_IsObjLocked(JSContext *cx, JSObject *obj); ! 182: extern JSBool js_IsScopeLocked(JSContext *cx, JSScope *scope); ! 183: ! 184: #else ! 185: ! 186: #define JS_IS_RUNTIME_LOCKED(rt) 0 ! 187: #define JS_IS_OBJ_LOCKED(cx,obj) 1 ! 188: #define JS_IS_SCOPE_LOCKED(cx,scope) 1 ! 189: ! 190: #endif /* DEBUG */ ! 191: ! 192: #define JS_LOCK_OBJ_VOID(cx, obj, e) \ ! 193: JS_BEGIN_MACRO \ ! 194: JS_LOCK_OBJ(cx, obj); \ ! 195: e; \ ! 196: JS_UNLOCK_OBJ(cx, obj); \ ! 197: JS_END_MACRO ! 198: ! 199: #define JS_LOCK_VOID(cx, e) \ ! 200: JS_BEGIN_MACRO \ ! 201: JSRuntime *_rt = (cx)->runtime; \ ! 202: JS_LOCK_RUNTIME_VOID(_rt, e); \ ! 203: JS_END_MACRO ! 204: ! 205: #if defined(JS_USE_ONLY_NSPR_LOCKS) || \ ! 206: !( (defined(_WIN32) && defined(_M_IX86)) || \ ! 207: (defined(__GNUC__) && defined(__i386__)) || \ ! 208: (defined(SOLARIS) && defined(sparc) && defined(ULTRA_SPARC)) || \ ! 209: defined(AIX) ) ! 210: ! 211: #define NSPR_LOCK 1 ! 212: ! 213: #undef JS_LOCK0 ! 214: #undef JS_UNLOCK0 ! 215: #define JS_LOCK0(P,M) (JS_ACQUIRE_LOCK(((JSLock*)(P)->fat)), (P)->owner = (M)) ! 216: #define JS_UNLOCK0(P,M) ((P)->owner = 0, JS_RELEASE_LOCK(((JSLock*)(P)->fat))) ! 217: ! 218: #else /* arch-tests */ ! 219: ! 220: #undef NSPR_LOCK ! 221: ! 222: extern JS_INLINE void js_Lock(JSThinLock *tl, jsword me); ! 223: extern JS_INLINE void js_Unlock(JSThinLock *tl, jsword me); ! 224: ! 225: #endif /* arch-tests */ ! 226: ! 227: #else /* !JS_THREADSAFE */ ! 228: ! 229: #define JS_ATOMIC_INCREMENT(p) (++*(p)) ! 230: #define JS_ATOMIC_DECREMENT(p) (--*(p)) ! 231: #define JS_ATOMIC_ADD(p,v) (*(p) += (v)) ! 232: ! 233: #define JS_CurrentThreadId() 0 ! 234: #define JS_NEW_LOCK() NULL ! 235: #define JS_DESTROY_LOCK(l) ((void)0) ! 236: #define JS_ACQUIRE_LOCK(l) ((void)0) ! 237: #define JS_RELEASE_LOCK(l) ((void)0) ! 238: #define JS_LOCK0(P,M) ((void)0) ! 239: #define JS_UNLOCK0(P,M) ((void)0) ! 240: ! 241: #define JS_NEW_CONDVAR(l) NULL ! 242: #define JS_DESTROY_CONDVAR(cv) ((void)0) ! 243: #define JS_WAIT_CONDVAR(cv,to) ((void)0) ! 244: #define JS_NOTIFY_CONDVAR(cv) ((void)0) ! 245: #define JS_NOTIFY_ALL_CONDVAR(cv) ((void)0) ! 246: ! 247: #define JS_LOCK_RUNTIME(rt) ((void)0) ! 248: #define JS_UNLOCK_RUNTIME(rt) ((void)0) ! 249: #define JS_LOCK_OBJ(cx,obj) ((void)0) ! 250: #define JS_UNLOCK_OBJ(cx,obj) ((void)0) ! 251: #define JS_LOCK_OBJ_VOID(cx,obj,e) (e) ! 252: #define JS_LOCK_SCOPE(cx,scope) ((void)0) ! 253: #define JS_UNLOCK_SCOPE(cx,scope) ((void)0) ! 254: #define JS_TRANSFER_SCOPE_LOCK(c,o,n) ((void)0) ! 255: ! 256: #define JS_IS_RUNTIME_LOCKED(rt) 1 ! 257: #define JS_IS_OBJ_LOCKED(cx,obj) 1 ! 258: #define JS_IS_SCOPE_LOCKED(cx,scope) 1 ! 259: #define JS_LOCK_VOID(cx, e) JS_LOCK_RUNTIME_VOID((cx)->runtime, e) ! 260: ! 261: #endif /* !JS_THREADSAFE */ ! 262: ! 263: #define JS_LOCK_RUNTIME_VOID(rt,e) \ ! 264: JS_BEGIN_MACRO \ ! 265: JS_LOCK_RUNTIME(rt); \ ! 266: e; \ ! 267: JS_UNLOCK_RUNTIME(rt); \ ! 268: JS_END_MACRO ! 269: ! 270: #define JS_LOCK_GC(rt) JS_ACQUIRE_LOCK((rt)->gcLock) ! 271: #define JS_UNLOCK_GC(rt) JS_RELEASE_LOCK((rt)->gcLock) ! 272: #define JS_LOCK_GC_VOID(rt,e) (JS_LOCK_GC(rt), (e), JS_UNLOCK_GC(rt)) ! 273: #define JS_AWAIT_GC_DONE(rt) JS_WAIT_CONDVAR((rt)->gcDone, JS_NO_TIMEOUT) ! 274: #define JS_NOTIFY_GC_DONE(rt) JS_NOTIFY_ALL_CONDVAR((rt)->gcDone) ! 275: #define JS_AWAIT_REQUEST_DONE(rt) JS_WAIT_CONDVAR((rt)->requestDone, \ ! 276: JS_NO_TIMEOUT) ! 277: #define JS_NOTIFY_REQUEST_DONE(rt) JS_NOTIFY_CONDVAR((rt)->requestDone) ! 278: ! 279: #define JS_LOCK(P,CX) JS_LOCK0(P,(CX)->thread) ! 280: #define JS_UNLOCK(P,CX) JS_UNLOCK0(P,(CX)->thread) ! 281: ! 282: #ifndef SET_OBJ_INFO ! 283: #define SET_OBJ_INFO(obj,f,l) ((void)0) ! 284: #endif ! 285: #ifndef SET_SCOPE_INFO ! 286: #define SET_SCOPE_INFO(scope,f,l) ((void)0) ! 287: #endif ! 288: ! 289: #endif /* jslock_h___ */
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