From a52a0147b7b9491e17b69cda754de7fe2476540f Mon Sep 17 00:00:00 2001 From: dgp Date: Fri, 22 Apr 2016 18:13:17 +0000 Subject: Refactor bytecode cleanup. --- generic/tclAssembly.c | 8 ++------ generic/tclCompile.c | 41 +++++++++++++++++++++++++++-------------- generic/tclCompile.h | 3 ++- generic/tclExecute.c | 17 +++++------------ 4 files changed, 36 insertions(+), 33 deletions(-) diff --git a/generic/tclAssembly.c b/generic/tclAssembly.c index 6d5676b..7db5d69 100644 --- a/generic/tclAssembly.c +++ b/generic/tclAssembly.c @@ -866,7 +866,7 @@ CompileAssembleObj( * Not valid, so free it and regenerate. */ - FreeAssembleCodeInternalRep(objPtr); + TclFreeIntRep(objPtr); } /* @@ -4313,11 +4313,7 @@ FreeAssembleCodeInternalRep( { ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1; - codePtr->refCount--; - if (codePtr->refCount <= 0) { - TclCleanupByteCode(codePtr); - } - objPtr->typePtr = NULL; + TclReleaseByteCode(codePtr); } /* diff --git a/generic/tclCompile.c b/generic/tclCompile.c index c0b5dcc..002b551 100644 --- a/generic/tclCompile.c +++ b/generic/tclCompile.c @@ -661,6 +661,7 @@ InstructionDesc const tclInstructionTable[] = { * Prototypes for procedures defined later in this file: */ +static void CleanupByteCode(ByteCode *codePtr); static ByteCode * CompileSubstObj(Tcl_Interp *interp, Tcl_Obj *objPtr, int flags); static void DupByteCodeInternalRep(Tcl_Obj *srcPtr, @@ -967,16 +968,13 @@ FreeByteCodeInternalRep( { register ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1; - objPtr->typePtr = NULL; - if (codePtr->refCount-- <= 1) { - TclCleanupByteCode(codePtr); - } + TclReleaseByteCode(codePtr); } /* *---------------------------------------------------------------------- * - * TclCleanupByteCode -- + * TclReleaseByteCode -- * * This procedure does all the real work of freeing up a bytecode * object's ByteCode structure. It's called only when the structure's @@ -993,7 +991,26 @@ FreeByteCodeInternalRep( */ void -TclCleanupByteCode( +TclPreserveByteCode( + register ByteCode *codePtr) +{ + codePtr->refCount++; +} + +void +TclReleaseByteCode( + register ByteCode *codePtr) +{ + if (--codePtr->refCount) { + return; + } + + /* Just dropped to refcount==0. Clean up. */ + CleanupByteCode(codePtr); +} + +static void +CleanupByteCode( register ByteCode *codePtr) /* Points to the ByteCode to free. */ { Tcl_Interp *interp = (Tcl_Interp *) *codePtr->interpHandle; @@ -1260,8 +1277,6 @@ Tcl_NRSubstObj( * * Results: * A (ByteCode *) is returned pointing to the resulting ByteCode. - * The caller must manage its refCount and arrange for a call to - * TclCleanupByteCode() when the last reference disappears. * * Side effects: * The Tcl_ObjType of objPtr is changed to the "substcode" type, and the @@ -1292,7 +1307,7 @@ CompileSubstObj( || (codePtr->nsEpoch != nsPtr->resolverEpoch) || (codePtr->localCachePtr != iPtr->varFramePtr->localCachePtr)) { - FreeSubstCodeInternalRep(objPtr); + TclFreeIntRep(objPtr); } } if (objPtr->typePtr != &substCodeType) { @@ -1353,10 +1368,7 @@ FreeSubstCodeInternalRep( { register ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1; - objPtr->typePtr = NULL; - if (codePtr->refCount-- <= 1) { - TclCleanupByteCode(codePtr); - } + TclReleaseByteCode(codePtr); } static void @@ -2752,7 +2764,8 @@ TclInitByteCodeObj( codePtr->compileEpoch = iPtr->compileEpoch; codePtr->nsPtr = namespacePtr; codePtr->nsEpoch = namespacePtr->resolverEpoch; - codePtr->refCount = 1; + codePtr->refCount = 0; + TclPreserveByteCode(codePtr); if (namespacePtr->compiledVarResProc || iPtr->resolverPtr) { codePtr->flags = TCL_BYTECODE_RESOLVE_VARS; } else { diff --git a/generic/tclCompile.h b/generic/tclCompile.h index d5bc86b..86a9db0 100644 --- a/generic/tclCompile.h +++ b/generic/tclCompile.h @@ -1067,7 +1067,6 @@ MODULE_SCOPE ByteCode * TclCompileObj(Tcl_Interp *interp, Tcl_Obj *objPtr, MODULE_SCOPE int TclAttemptCompileProc(Tcl_Interp *interp, Tcl_Parse *parsePtr, int depth, Command *cmdPtr, CompileEnv *envPtr); -MODULE_SCOPE void TclCleanupByteCode(ByteCode *codePtr); MODULE_SCOPE void TclCleanupStackForBreakContinue(CompileEnv *envPtr, ExceptionAux *auxPtr); MODULE_SCOPE void TclCompileCmdWord(Tcl_Interp *interp, @@ -1157,6 +1156,8 @@ MODULE_SCOPE void TclPushVarName(Tcl_Interp *interp, Tcl_Token *varTokenPtr, CompileEnv *envPtr, int flags, int *localIndexPtr, int *isScalarPtr); +MODULE_SCOPE void TclPreserveByteCode(ByteCode *codePtr); +MODULE_SCOPE void TclReleaseByteCode(ByteCode *codePtr); MODULE_SCOPE void TclReleaseLiteral(Tcl_Interp *interp, Tcl_Obj *objPtr); MODULE_SCOPE void TclInvalidateCmdLiteral(Tcl_Interp *interp, const char *name, Namespace *nsPtr); diff --git a/generic/tclExecute.c b/generic/tclExecute.c index 823f619..2a2b951 100644 --- a/generic/tclExecute.c +++ b/generic/tclExecute.c @@ -1499,11 +1499,9 @@ ExprObjCallback( * * Results: * A (ByteCode *) is returned pointing to the resulting ByteCode. - * The caller must manage its refCount and arrange for a call to - * TclCleanupByteCode() when the last reference disappears. * * Side effects: - * The Tcl_ObjType of objPtr is changed to the "bytecode" type, + * The Tcl_ObjType of objPtr is changed to the "exprcode" type, * and the ByteCode is kept in the internal rep (along with context * data for checking validity) for faster operations the next time * CompileExprObj is called on the same value. @@ -1536,7 +1534,7 @@ CompileExprObj( || (codePtr->nsPtr != namespacePtr) || (codePtr->nsEpoch != namespacePtr->resolverEpoch) || (codePtr->localCachePtr != iPtr->varFramePtr->localCachePtr)) { - FreeExprCodeInternalRep(objPtr); + TclFreeIntRep(objPtr); } } if (objPtr->typePtr != &exprCodeType) { @@ -1644,10 +1642,7 @@ FreeExprCodeInternalRep( { ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1; - objPtr->typePtr = NULL; - if (codePtr->refCount-- <= 1) { - TclCleanupByteCode(codePtr); - } + TclReleaseByteCode(codePtr); } /* @@ -2033,7 +2028,7 @@ TclNRExecuteByteCode( * sizeof(void *); int numWords = (size + sizeof(Tcl_Obj *) - 1) / sizeof(Tcl_Obj *); - codePtr->refCount++; + TclPreserveByteCode(codePtr); /* * Reserve the stack, setup the TEBCdataPtr (TD) and CallFrame @@ -8189,9 +8184,7 @@ TEBCresume( } iPtr->cmdFramePtr = bcFramePtr->nextPtr; - if (codePtr->refCount-- <= 1) { - TclCleanupByteCode(codePtr); - } + TclReleaseByteCode(codePtr); TclStackFree(interp, TD); /* free my stack */ return result; -- cgit v0.12