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-rw-r--r--ChangeLog8
-rw-r--r--generic/tclFileSystem.h1
-rw-r--r--generic/tclIOUtil.c84
-rw-r--r--generic/tclPathObj.c17
4 files changed, 72 insertions, 38 deletions
diff --git a/ChangeLog b/ChangeLog
index 64f4fb8..f44a0b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-06-25 Don Porter <dgp@users.sourceforge.net>
+
+ * generic/tclFileSystem.h: [Bug 3024359] Make sure that the
+ * generic/tclIOUtil.c: per-thread cache of the list of file systems
+ * generic/tclPathObj.c: currently registered is only updated at times
+ when no active loops are traversing it. Also reduce the amount of
+ epoch storing and checking to where it can make a difference.
+
2012-06-25 Donal K. Fellows <dkf@users.sf.net>
* generic/tclCmdAH.c (EncodingDirsObjCmd): [Bug 3537605]: Do the right
diff --git a/generic/tclFileSystem.h b/generic/tclFileSystem.h
index 088bf85..5bf61c1 100644
--- a/generic/tclFileSystem.h
+++ b/generic/tclFileSystem.h
@@ -51,6 +51,7 @@ typedef struct ThreadSpecificData {
Tcl_Obj *cwdPathPtr;
ClientData cwdClientData;
FilesystemRecord *filesystemList;
+ int claims;
} ThreadSpecificData;
/*
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index b8bb0f7..c1abc8e 100644
--- a/generic/tclIOUtil.c
+++ b/generic/tclIOUtil.c
@@ -40,9 +40,10 @@ static void FsAddMountsToGlobResult(Tcl_Obj *resultPtr,
Tcl_Obj *pathPtr, const char *pattern,
Tcl_GlobTypeData *types);
static void FsUpdateCwd(Tcl_Obj *cwdObj, ClientData clientData);
-#ifdef TCL_THREADS
static void FsRecacheFilesystemList(void);
-#endif
+static void Claim(void);
+static void Disclaim(void);
+
static void * DivertFindSymbol(Tcl_Interp *interp,
Tcl_LoadHandle loadHandle, const char *symbol);
static void DivertUnloadFile(Tcl_LoadHandle loadHandle);
@@ -174,7 +175,7 @@ static FilesystemRecord nativeFilesystemRecord = {
* trigger cache cleanup in all threads.
*/
-static int theFilesystemEpoch = 0;
+static int theFilesystemEpoch = 1;
/*
* Stores the linked list of filesystems. A 1:1 copy of this list is also
@@ -521,12 +522,11 @@ TclFSCwdPointerEquals(
}
}
-#ifdef TCL_THREADS
static void
FsRecacheFilesystemList(void)
{
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey);
- FilesystemRecord *fsRecPtr, *tmpFsRecPtr = NULL, *toFree = NULL;
+ FilesystemRecord *fsRecPtr, *tmpFsRecPtr = NULL, *toFree = NULL, *list;
/*
* Trash the current cache.
@@ -535,20 +535,16 @@ FsRecacheFilesystemList(void)
fsRecPtr = tsdPtr->filesystemList;
while (fsRecPtr != NULL) {
tmpFsRecPtr = fsRecPtr->nextPtr;
- fsRecPtr->fsPtr = NULL;
fsRecPtr->nextPtr = toFree;
toFree = fsRecPtr;
fsRecPtr = tmpFsRecPtr;
}
- tsdPtr->filesystemList = NULL;
/*
- * Code below operates on shared data. We are already called under mutex
- * lock so we can safely proceed.
- *
* Locate tail of the global filesystem list.
*/
+ Tcl_MutexLock(&filesystemMutex);
fsRecPtr = filesystemList;
while (fsRecPtr != NULL) {
tmpFsRecPtr = fsRecPtr;
@@ -559,21 +555,23 @@ FsRecacheFilesystemList(void)
* Refill the cache honouring the order.
*/
+ list = NULL;
fsRecPtr = tmpFsRecPtr;
while (fsRecPtr != NULL) {
tmpFsRecPtr = ckalloc(sizeof(FilesystemRecord));
*tmpFsRecPtr = *fsRecPtr;
- tmpFsRecPtr->nextPtr = tsdPtr->filesystemList;
+ tmpFsRecPtr->nextPtr = list;
tmpFsRecPtr->prevPtr = NULL;
- if (tsdPtr->filesystemList) {
- tsdPtr->filesystemList->prevPtr = tmpFsRecPtr;
- }
- tsdPtr->filesystemList = tmpFsRecPtr;
+ list = tmpFsRecPtr;
fsRecPtr = fsRecPtr->prevPtr;
}
+ tsdPtr->filesystemList = list;
+ tsdPtr->filesystemEpoch = theFilesystemEpoch;
+ Tcl_MutexUnlock(&filesystemMutex);
while (toFree) {
FilesystemRecord *next = toFree->nextPtr;
+ toFree->fsPtr = NULL;
ckfree(toFree);
toFree = next;
}
@@ -587,28 +585,16 @@ FsRecacheFilesystemList(void)
tsdPtr->initialized = 1;
}
}
-#endif /* TCL_THREADS */
static FilesystemRecord *
FsGetFirstFilesystem(void)
{
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey);
- FilesystemRecord *fsRecPtr;
-
-#ifndef TCL_THREADS
- tsdPtr->filesystemEpoch = theFilesystemEpoch;
- fsRecPtr = filesystemList;
-#else
- Tcl_MutexLock(&filesystemMutex);
- if (tsdPtr->filesystemList == NULL
- || (tsdPtr->filesystemEpoch != theFilesystemEpoch)) {
+ if (tsdPtr->filesystemList == NULL || ((tsdPtr->claims == 0)
+ && (tsdPtr->filesystemEpoch != theFilesystemEpoch))) {
FsRecacheFilesystemList();
- tsdPtr->filesystemEpoch = theFilesystemEpoch;
}
- Tcl_MutexUnlock(&filesystemMutex);
- fsRecPtr = tsdPtr->filesystemList;
-#endif
- return fsRecPtr;
+ return tsdPtr->filesystemList;
}
/*
@@ -620,10 +606,21 @@ int
TclFSEpochOk(
int filesystemEpoch)
{
+ return (filesystemEpoch == 0 || filesystemEpoch == theFilesystemEpoch);
+}
+
+static void
+Claim()
+{
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey);
+ tsdPtr->claims++;
+}
- (void) FsGetFirstFilesystem();
- return (filesystemEpoch == tsdPtr->filesystemEpoch);
+static void
+Disclaim()
+{
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tclFsDataKey);
+ tsdPtr->claims--;
}
/*
@@ -741,6 +738,7 @@ TclFinalizeFilesystem(void)
}
fsRecPtr = tmpFsRecPtr;
}
+ theFilesystemEpoch++;
filesystemList = NULL;
/*
@@ -773,6 +771,7 @@ void
TclResetFilesystem(void)
{
filesystemList = &nativeFilesystemRecord;
+ theFilesystemEpoch++;
#ifdef __WIN32__
/*
@@ -1345,6 +1344,7 @@ TclFSNormalizeToUniquePath(
firstFsRecPtr = FsGetFirstFilesystem();
+ Claim();
for (fsRecPtr=firstFsRecPtr; fsRecPtr!=NULL; fsRecPtr=fsRecPtr->nextPtr) {
if (fsRecPtr->fsPtr != &tclNativeFilesystem) {
continue;
@@ -1382,6 +1382,7 @@ TclFSNormalizeToUniquePath(
* but there's not much benefit.
*/
}
+ Disclaim();
return startAt;
}
@@ -2588,8 +2589,9 @@ Tcl_FSGetCwd(
* indicates the particular function has succeeded.
*/
- for (fsRecPtr = FsGetFirstFilesystem();
- (retVal == NULL) && (fsRecPtr != NULL);
+ fsRecPtr = FsGetFirstFilesystem();
+ Claim();
+ for (; (retVal == NULL) && (fsRecPtr != NULL);
fsRecPtr = fsRecPtr->nextPtr) {
ClientData retCd;
TclFSGetCwdProc2 *proc2;
@@ -2634,6 +2636,7 @@ Tcl_FSGetCwd(
}
Tcl_DecrRefCount(retVal);
retVal = NULL;
+ Disclaim();
goto cdDidNotChange;
} else if (interp != NULL) {
Tcl_AppendResult(interp,
@@ -2641,6 +2644,7 @@ Tcl_FSGetCwd(
Tcl_PosixError(interp), NULL);
}
}
+ Disclaim();
/*
* Now the 'cwd' may NOT be normalized, at least on some platforms.
@@ -3761,6 +3765,7 @@ Tcl_FSListVolumes(void)
*/
fsRecPtr = FsGetFirstFilesystem();
+ Claim();
while (fsRecPtr != NULL) {
if (fsRecPtr->fsPtr->listVolumesProc != NULL) {
Tcl_Obj *thisFsVolumes = fsRecPtr->fsPtr->listVolumesProc();
@@ -3772,6 +3777,7 @@ Tcl_FSListVolumes(void)
}
fsRecPtr = fsRecPtr->nextPtr;
}
+ Disclaim();
return resultPtr;
}
@@ -3811,6 +3817,7 @@ FsListMounts(
*/
fsRecPtr = FsGetFirstFilesystem();
+ Claim();
while (fsRecPtr != NULL) {
if (fsRecPtr->fsPtr != &tclNativeFilesystem &&
fsRecPtr->fsPtr->matchInDirectoryProc != NULL) {
@@ -3822,6 +3829,7 @@ FsListMounts(
}
fsRecPtr = fsRecPtr->nextPtr;
}
+ Disclaim();
return resultPtr;
}
@@ -4034,6 +4042,7 @@ TclFSNonnativePathType(
*/
fsRecPtr = FsGetFirstFilesystem();
+ Claim();
while (fsRecPtr != NULL) {
/*
* We want to skip the native filesystem in this loop because
@@ -4111,6 +4120,7 @@ TclFSNonnativePathType(
}
fsRecPtr = fsRecPtr->nextPtr;
}
+ Disclaim();
return type;
}
@@ -4498,10 +4508,14 @@ Tcl_FSGetFileSystemForPath(
*/
fsRecPtr = FsGetFirstFilesystem();
+ Claim();
+
if (TclFSEnsureEpochOk(pathPtr, &retVal) != TCL_OK) {
+ Disclaim();
return NULL;
} else if (retVal != NULL) {
/* TODO: Can this happen? */
+ Disclaim();
return retVal;
}
@@ -4524,9 +4538,11 @@ Tcl_FSGetFileSystemForPath(
*/
TclFSSetPathDetails(pathPtr, fsRecPtr->fsPtr, clientData);
+ Disclaim();
return fsRecPtr->fsPtr;
}
}
+ Disclaim();
return NULL;
}
diff --git a/generic/tclPathObj.c b/generic/tclPathObj.c
index 06ee984..df9a58a 100644
--- a/generic/tclPathObj.c
+++ b/generic/tclPathObj.c
@@ -564,8 +564,7 @@ TclPathPart(
if (pathPtr->typePtr == &tclFsPathType) {
FsPath *fsPathPtr = PATHOBJ(pathPtr);
- if (TclFSEpochOk(fsPathPtr->filesystemEpoch)
- && (PATHFLAGS(pathPtr) != 0)) {
+ if (PATHFLAGS(pathPtr) != 0) {
switch (portion) {
case TCL_PATH_DIRNAME: {
/*
@@ -1307,7 +1306,7 @@ TclNewFSPathObj(
Tcl_IncrRefCount(dirPtr);
fsPathPtr->nativePathPtr = NULL;
fsPathPtr->fsPtr = NULL;
- fsPathPtr->filesystemEpoch = tsdPtr->filesystemEpoch;
+ fsPathPtr->filesystemEpoch = 0;
SETPATHOBJ(pathPtr, fsPathPtr);
PATHFLAGS(pathPtr) = TCLPATH_APPENDED;
@@ -1524,6 +1523,7 @@ TclFSMakePathFromNormalized(
fsPathPtr->cwdPtr = NULL;
fsPathPtr->nativePathPtr = NULL;
fsPathPtr->fsPtr = NULL;
+ /* Remember the epoch under which we decided pathPtr was normalized */
fsPathPtr->filesystemEpoch = tsdPtr->filesystemEpoch;
SETPATHOBJ(pathPtr, fsPathPtr);
@@ -1660,6 +1660,12 @@ Tcl_FSGetTranslatedPath(
retObj = Tcl_FSJoinToPath(translatedCwdPtr, 1,
&srcFsPathPtr->normPathPtr);
srcFsPathPtr->translatedPathPtr = retObj;
+ if (translatedCwdPtr->typePtr == &tclFsPathType) {
+ srcFsPathPtr->filesystemEpoch
+ = PATHOBJ(translatedCwdPtr)->filesystemEpoch;
+ } else {
+ srcFsPathPtr->filesystemEpoch = 0;
+ }
Tcl_IncrRefCount(retObj);
Tcl_DecrRefCount(translatedCwdPtr);
} else {
@@ -2462,12 +2468,15 @@ SetFsPathFromAny(
fsPathPtr->translatedPathPtr = transPtr;
if (transPtr != pathPtr) {
Tcl_IncrRefCount(fsPathPtr->translatedPathPtr);
+ /* Redo translation when $env(HOME) changes */
+ fsPathPtr->filesystemEpoch = tsdPtr->filesystemEpoch;
+ } else {
+ fsPathPtr->filesystemEpoch = 0;
}
fsPathPtr->normPathPtr = NULL;
fsPathPtr->cwdPtr = NULL;
fsPathPtr->nativePathPtr = NULL;
fsPathPtr->fsPtr = NULL;
- fsPathPtr->filesystemEpoch = tsdPtr->filesystemEpoch;
/*
* Free old representation before installing our new one.
generated by cgit v0.12 at 2024-08-20 00:32:10 (GMT)