diff options
| -rw-r--r-- | generic/tclIOUtil.c | 86 |
1 files changed, 40 insertions, 46 deletions
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c index d98e760..80eccbf 100644 --- a/generic/tclIOUtil.c +++ b/generic/tclIOUtil.c @@ -40,10 +40,9 @@ static void FsAddMountsToGlobResult(Tcl_Obj *resultPtr, static void FsUpdateCwd(Tcl_Obj *cwdObj, ClientData clientData); static void FsRecacheFilesystemList(void); -static void Purge(FilesystemRecord *fsRecPtr); +static void Claim(void); +static void Disclaim(void); -#define Claim() (tsdPtr->claims++) -#define Disclaim() if (--tsdPtr->claims <= 0) Purge(tsdPtr->filesystemList); /* * These form part of the native filesystem support. They are needed here @@ -589,23 +588,31 @@ static void FsRecacheFilesystemList(void) { ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); - FilesystemRecord *fsRecPtr, *tmpFsRecPtr = NULL; + FilesystemRecord *fsRecPtr, *tmpFsRecPtr = NULL, *chain = NULL; /* * Trash the current cache. */ + fsRecPtr = tsdPtr->filesystemList; if (tsdPtr->claims <= 0) { - fsRecPtr = tsdPtr->filesystemList; while (fsRecPtr != NULL) { - tmpFsRecPtr = fsRecPtr->nextPtr; + tmpFsRecPtr = fsRecPtr->nextPtr; if (--fsRecPtr->fileRefCount <= 0) { ckfree((char *)fsRecPtr); } fsRecPtr = tmpFsRecPtr; } - tsdPtr->filesystemList = NULL; + } else { + chain = fsRecPtr; + while (fsRecPtr->nextPtr != NULL) { + fsRecPtr->prevPtr = fsRecPtr->nextPtr; + fsRecPtr->nextPtr = NULL; + fsRecPtr = fsRecPtr->prevPtr; + } + fsRecPtr->prevPtr = fsRecPtr; } + tsdPtr->filesystemList = NULL; /* * Locate tail of the global filesystem list. @@ -627,7 +634,8 @@ FsRecacheFilesystemList(void) tmpFsRecPtr = (FilesystemRecord *) ckalloc(sizeof(FilesystemRecord)); *tmpFsRecPtr = *fsRecPtr; tmpFsRecPtr->nextPtr = tsdPtr->filesystemList; - tmpFsRecPtr->prevPtr = NULL; + tmpFsRecPtr->prevPtr = chain; + chain = NULL; tsdPtr->filesystemList = tmpFsRecPtr; fsRecPtr = fsRecPtr->prevPtr; } @@ -668,24 +676,39 @@ TclFSEpochOk( } static void -Purge( - FilesystemRecord *fsRecPtr) +Claim() +{ + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); + + tsdPtr->claims++; +} + +static void +Disclaim() { - FilesystemRecord *toRelease; + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); + FilesystemRecord *fsRecPtr, *toRelease, *lastCurrent; + + if (--tsdPtr->claims > 0) { + return; + } + fsRecPtr = tsdPtr->filesystemList; /* * Release all out of date FilesystemRecords. * First skip the current list. */ - while (fsRecPtr->fsPtr != &tclNativeFilesystem) { + while (fsRecPtr->nextPtr != NULL) { fsRecPtr = fsRecPtr->nextPtr; } /* Then release everything that comes after. */ - toRelease = fsRecPtr->nextPtr; + lastCurrent = fsRecPtr; + toRelease = lastCurrent->prevPtr; + lastCurrent->prevPtr = NULL; while (toRelease != NULL) { - fsRecPtr = toRelease->nextPtr; - + fsRecPtr = (toRelease == toRelease->prevPtr) ? NULL + : toRelease->prevPtr; if (--toRelease->fileRefCount <= 0) { ckfree((char *)toRelease); } @@ -1384,9 +1407,6 @@ Tcl_FSData( if (fsRecPtr->fsPtr == fsPtr) { retVal = fsRecPtr->clientData; } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } @@ -1432,7 +1452,6 @@ TclFSNormalizeToUniquePath( * for a given filesystem, we can optionally * return an fs-specific clientdata here. */ { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr, *firstFsRecPtr; /* Ignore this variable */ (void) clientDataPtr; @@ -1465,9 +1484,7 @@ TclFSNormalizeToUniquePath( * Skip the native system next time through. */ - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } else { + if (fsRecPtr->fsPtr != &tclNativeFilesystem) { Tcl_FSNormalizePathProc *proc = fsRecPtr->fsPtr->normalizePathProc; if (proc != NULL) { startAt = (*proc)(interp, pathPtr, startAt); @@ -2714,6 +2731,7 @@ Tcl_FSGetCwd( } Tcl_DecrRefCount(retVal); retVal = NULL; + Disclaim(); goto cdDidNotChange; } else if (interp != NULL) { Tcl_AppendResult(interp, @@ -2724,9 +2742,6 @@ Tcl_FSGetCwd( retVal = (*proc)(interp); } } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); @@ -3665,7 +3680,6 @@ Tcl_FSLink( Tcl_Obj* Tcl_FSListVolumes(void) { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr; Tcl_Obj *resultPtr = Tcl_NewObj(); @@ -3687,9 +3701,6 @@ Tcl_FSListVolumes(void) Tcl_DecrRefCount(thisFsVolumes); } } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); @@ -3720,7 +3731,6 @@ FsListMounts( Tcl_Obj *pathPtr, /* Contains path to directory to search. */ const char *pattern) /* Pattern to match against. */ { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr; Tcl_GlobTypeData mountsOnly = { TCL_GLOB_TYPE_MOUNT, 0, NULL, NULL }; Tcl_Obj *resultPtr = NULL; @@ -3745,9 +3755,6 @@ FsListMounts( (*proc)(NULL, resultPtr, pathPtr, pattern, &mountsOnly); } } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); @@ -3867,7 +3874,6 @@ TclFSInternalToNormalized( ClientData clientData, FilesystemRecord **fsRecPtrPtr) { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr = FsGetFirstFilesystem(); Claim(); @@ -3876,10 +3882,6 @@ TclFSInternalToNormalized( *fsRecPtrPtr = fsRecPtr; break; } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - fsRecPtr = NULL; - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); @@ -3985,7 +3987,6 @@ TclFSNonnativePathType( * path, already with a refCount for the * caller. */ { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr; Tcl_PathType type = TCL_PATH_RELATIVE; @@ -4073,9 +4074,6 @@ TclFSNonnativePathType( } } } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); @@ -4446,7 +4444,6 @@ Tcl_Filesystem * Tcl_FSGetFileSystemForPath( Tcl_Obj* pathPtr) { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey); FilesystemRecord *fsRecPtr; Tcl_Filesystem* retVal = NULL; @@ -4501,9 +4498,6 @@ Tcl_FSGetFileSystemForPath( retVal = fsRecPtr->fsPtr; } } - if (fsRecPtr->fsPtr == &tclNativeFilesystem) { - break; - } fsRecPtr = fsRecPtr->nextPtr; } Disclaim(); |