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authordgp <dgp@users.sourceforge.net>2011-09-23 19:16:23 (GMT)
committerdgp <dgp@users.sourceforge.net>2011-09-23 19:16:23 (GMT)
commite3352567a2a3af2547b61485e6b91c0efd03533b (patch)
tree1bcc5cca4292509b60f84e4d795df9f08e153b2e /generic
parentb1b7242607411370b9765327872a81c2e8c88513 (diff)
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More revisions to get finalization of ReflectedTransforms correct,
including adopting a "dead" field as was done in tclIORChan.c.
Diffstat (limited to 'generic')
-rw-r--r--generic/tclIORTrans.c119
1 files changed, 63 insertions, 56 deletions
diff --git a/generic/tclIORTrans.c b/generic/tclIORTrans.c
index 0617df3..b095dcf 100644
--- a/generic/tclIORTrans.c
+++ b/generic/tclIORTrans.c
@@ -161,6 +161,8 @@ typedef struct {
int mode; /* Mask of R/W mode */
int nonblocking; /* Flag: Channel is blocking or not. */
int readIsDrained; /* Flag: Read buffers are flushed. */
+ int dead; /* Boolean signal that some operations
+ * should no longer be attempted. */
ResultBuffer result;
} ReflectedTransform;
@@ -1008,27 +1010,27 @@ ReflectClose(
* the per-interp DeleteReflectedTransformMap exit-handler.
*/
- if (rtPtr->interp) {
+ if (!rtPtr->dead) {
rtmPtr = GetReflectedTransformMap(rtPtr->interp);
hPtr = Tcl_FindHashEntry(&rtmPtr->map, Tcl_GetString(rtPtr->handle));
if (hPtr) {
Tcl_DeleteHashEntry(hPtr);
}
- }
- /*
- * In a threaded interpreter we manage a per-thread map as well, to allow
- * us to survive if the script level pulls the rug out under a channel by
- * deleting the owning thread.
- */
+ /*
+ * In a threaded interpreter we manage a per-thread map as well,
+ * to allow us to survive if the script level pulls the rug out
+ * under a channel by deleting the owning thread.
+ */
#ifdef TCL_THREADS
- rtmPtr = GetThreadReflectedTransformMap();
- hPtr = Tcl_FindHashEntry(&rtmPtr->map, Tcl_GetString(rtPtr->handle));
- if (hPtr) {
- Tcl_DeleteHashEntry(hPtr);
- }
+ rtmPtr = GetThreadReflectedTransformMap();
+ hPtr = Tcl_FindHashEntry(&rtmPtr->map, Tcl_GetString(rtPtr->handle));
+ if (hPtr) {
+ Tcl_DeleteHashEntry(hPtr);
+ }
#endif
+ }
Tcl_EventuallyFree (rtPtr, (Tcl_FreeProc *) FreeReflectedTransform);
return errorCodeSet ? errorCode : ((result == TCL_OK) ? EOK : EINVAL);
@@ -1771,6 +1773,7 @@ NewReflectedTransform(
rtPtr->readIsDrained = 0;
rtPtr->nonblocking =
(((Channel *) parentChan)->state->flags & CHANNEL_NONBLOCKING);
+ rtPtr->dead = 0;
/*
* Query parent for current blocking mode.
@@ -1950,7 +1953,7 @@ InvokeTclMethod(
int result; /* Result code of method invokation */
Tcl_Obj *resObj = NULL; /* Result of method invokation. */
- if (!rtPtr->interp) {
+ if (rtPtr->dead) {
/*
* The transform is marked as dead. Bail out immediately, with an
* appropriate error.
@@ -2163,7 +2166,8 @@ DeleteReflectedTransformMap(
hPtr != NULL;
hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch)) {
rtPtr = Tcl_GetHashValue(hPtr);
- rtPtr->interp = NULL;
+
+ rtPtr->dead = 1;
Tcl_DeleteHashEntry(hPtr);
}
Tcl_DeleteHashTable(&rtmPtr->map);
@@ -2175,6 +2179,32 @@ DeleteReflectedTransformMap(
*/
/*
+ * Get the map of all channels handled by the current thread. This is a
+ * ReflectedTransformMap, but on a per-thread basis, not per-interp. Go
+ * through the channels and remove all which were handled by this
+ * interpreter. They have already been marked as dead.
+ */
+
+ rtmPtr = GetThreadReflectedTransformMap();
+ for (hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch);
+ hPtr != NULL;
+ hPtr = Tcl_NextHashEntry(&hSearch)) {
+ rtPtr = Tcl_GetHashValue(hPtr);
+
+ if (rtPtr->interp != interp) {
+ /*
+ * Ignore entries for other interpreters.
+ */
+
+ continue;
+ }
+
+ rtPtr->dead = 1;
+ FreeReflectedTransformArgs(rtPtr);
+ Tcl_DeleteHashEntry(hPtr);
+ }
+
+ /*
* Go through the list of pending results and cancel all whose events were
* destined for this interpreter. While this is in progress we block any
* other access to the list of pending results.
@@ -2210,29 +2240,6 @@ DeleteReflectedTransformMap(
}
Tcl_MutexUnlock(&rtForwardMutex);
- /*
- * Get the map of all channels handled by the current thread. This is a
- * ReflectedTransformMap, but on a per-thread basis, not per-interp. Go
- * through the channels and remove all which were handled by this
- * interpreter. They have already been marked as dead.
- */
-
- rtmPtr = GetThreadReflectedTransformMap();
- for (hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch);
- hPtr != NULL;
- hPtr = Tcl_NextHashEntry(&hSearch)) {
- rtPtr = Tcl_GetHashValue(hPtr);
-
- if (rtPtr->interp != interp) {
- /*
- * Ignore entries for other interpreters.
- */
-
- continue;
- }
-
- Tcl_DeleteHashEntry(hPtr);
- }
#endif
}
@@ -2303,6 +2310,24 @@ DeleteThreadReflectedTransformMap(
*/
/*
+ * Get the map of all channels handled by the current thread. This is a
+ * ReflectedTransformMap, but on a per-thread basis, not per-interp. Go
+ * through the channels, remove all, mark them as dead.
+ */
+
+ rtmPtr = GetThreadReflectedTransformMap();
+ for (hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch);
+ hPtr != NULL;
+ hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch)) {
+ ReflectedTransform *rtPtr = Tcl_GetHashValue(hPtr);
+
+ rtPtr->dead = 1;
+ FreeReflectedTransformArgs(rtPtr);
+ Tcl_DeleteHashEntry(hPtr);
+ }
+ ckfree(rtmPtr);
+
+ /*
* Go through the list of pending results and cancel all whose events were
* destined for this thread. While this is in progress we block any
* other access to the list of pending results.
@@ -2340,24 +2365,6 @@ DeleteThreadReflectedTransformMap(
Tcl_ConditionNotify(&resultPtr->done);
}
Tcl_MutexUnlock(&rtForwardMutex);
-
- /*
- * Get the map of all channels handled by the current thread. This is a
- * ReflectedTransformMap, but on a per-thread basis, not per-interp. Go
- * through the channels, remove all, mark them as dead.
- */
-
- rtmPtr = GetThreadReflectedTransformMap();
- for (hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch);
- hPtr != NULL;
- hPtr = Tcl_FirstHashEntry(&rtmPtr->map, &hSearch)) {
- ReflectedTransform *rtPtr = Tcl_GetHashValue(hPtr);
-
- rtPtr->interp = NULL;
- FreeReflectedTransformArgs(rtPtr);
- Tcl_DeleteHashEntry(hPtr);
- }
- ckfree(rtmPtr);
}
static void
@@ -2377,7 +2384,7 @@ ForwardOpToOwnerThread(
Tcl_MutexLock(&rtForwardMutex);
- if (rtPtr->interp == NULL) {
+ if (rtPtr->dead) {
/*
* The channel is marked as dead. Bail out immediately, with an
* appropriate error. Do not forget to unlock the mutex on this path.