#include "tclInt.h"
#include "tclPort.h"
typedef struct TimerHandler {
Tcl_Time time;
Tcl_TimerProc *proc;
ClientData clientData;
Tcl_TimerToken token;
struct TimerHandler *nextPtr;
} TimerHandler;
typedef struct AfterInfo {
struct AfterAssocData *assocPtr;
Tcl_Obj *commandPtr;
int id;
Tcl_TimerToken token;
struct AfterInfo *nextPtr;
} AfterInfo;
typedef struct AfterAssocData {
Tcl_Interp *interp;
AfterInfo *firstAfterPtr;
} AfterAssocData;
typedef struct IdleHandler {
Tcl_IdleProc (*proc);
ClientData clientData;
int generation;
struct IdleHandler *nextPtr;
} IdleHandler;
typedef struct ThreadSpecificData {
TimerHandler *firstTimerHandlerPtr;
int lastTimerId;
int timerPending;
IdleHandler *idleList;
IdleHandler *lastIdlePtr;
int idleGeneration;
int afterId;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
static void AfterCleanupProc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp));
static void AfterProc _ANSI_ARGS_((ClientData clientData));
static void FreeAfterPtr _ANSI_ARGS_((AfterInfo *afterPtr));
static AfterInfo * GetAfterEvent _ANSI_ARGS_((AfterAssocData *assocPtr,
Tcl_Obj *commandPtr));
static ThreadSpecificData *InitTimer _ANSI_ARGS_((void));
static void TimerExitProc _ANSI_ARGS_((ClientData clientData));
static int TimerHandlerEventProc _ANSI_ARGS_((Tcl_Event *evPtr,
int flags));
static void TimerCheckProc _ANSI_ARGS_((ClientData clientData,
int flags));
static void TimerSetupProc _ANSI_ARGS_((ClientData clientData,
int flags));
static ThreadSpecificData *
InitTimer()
{
ThreadSpecificData *tsdPtr =
(ThreadSpecificData *) TclThreadDataKeyGet(&dataKey);
if (tsdPtr == NULL) {
tsdPtr = TCL_TSD_INIT(&dataKey);
Tcl_CreateEventSource(TimerSetupProc, TimerCheckProc, NULL);
Tcl_CreateThreadExitHandler(TimerExitProc, NULL);
}
return tsdPtr;
}
static void
TimerExitProc(clientData)
ClientData clientData;
{
ThreadSpecificData *tsdPtr =
(ThreadSpecificData *) TclThreadDataKeyGet(&dataKey);
Tcl_DeleteEventSource(TimerSetupProc, TimerCheckProc, NULL);
if (tsdPtr != NULL) {
register TimerHandler *timerHandlerPtr;
timerHandlerPtr = tsdPtr->firstTimerHandlerPtr;
while (timerHandlerPtr != NULL) {
tsdPtr->firstTimerHandlerPtr = timerHandlerPtr->nextPtr;
ckfree((char *) timerHandlerPtr);
timerHandlerPtr = tsdPtr->firstTimerHandlerPtr;
}
}
}
Tcl_TimerToken
Tcl_CreateTimerHandler(milliseconds, proc, clientData)
int milliseconds;
Tcl_TimerProc *proc;
ClientData clientData;
{
register TimerHandler *timerHandlerPtr, *tPtr2, *prevPtr;
Tcl_Time time;
ThreadSpecificData *tsdPtr;
tsdPtr = InitTimer();
timerHandlerPtr = (TimerHandler *) ckalloc(sizeof(TimerHandler));
Tcl_GetTime(&time);
timerHandlerPtr->time.sec = time.sec + milliseconds/1000;
timerHandlerPtr->time.usec = time.usec + (milliseconds%1000)*1000;
if (timerHandlerPtr->time.usec >= 1000000) {
timerHandlerPtr->time.usec -= 1000000;
timerHandlerPtr->time.sec += 1;
}
timerHandlerPtr->proc = proc;
timerHandlerPtr->clientData = clientData;
tsdPtr->lastTimerId++;
timerHandlerPtr->token = (Tcl_TimerToken) tsdPtr->lastTimerId;
for (tPtr2 = tsdPtr->firstTimerHandlerPtr, prevPtr = NULL; tPtr2 != NULL;
prevPtr = tPtr2, tPtr2 = tPtr2->nextPtr) {
if ((tPtr2->time.sec > timerHandlerPtr->time.sec)
|| ((tPtr2->time.sec == timerHandlerPtr->time.sec)
&& (tPtr2->time.usec > timerHandlerPtr->time.usec))) {
break;
}
}
timerHandlerPtr->nextPtr = tPtr2;
if (prevPtr == NULL) {
tsdPtr->firstTimerHandlerPtr = timerHandlerPtr;
} else {
prevPtr->nextPtr = timerHandlerPtr;
}
TimerSetupProc(NULL, TCL_ALL_EVENTS);
return timerHandlerPtr->token;
}
void
Tcl_DeleteTimerHandler(token)
Tcl_TimerToken token;
{
register TimerHandler *timerHandlerPtr, *prevPtr;
ThreadSpecificData *tsdPtr;
tsdPtr = InitTimer();
for (timerHandlerPtr = tsdPtr->firstTimerHandlerPtr, prevPtr = NULL;
timerHandlerPtr != NULL; prevPtr = timerHandlerPtr,
timerHandlerPtr = timerHandlerPtr->nextPtr) {
if (timerHandlerPtr->token != token) {
continue;
}
if (prevPtr == NULL) {
tsdPtr->firstTimerHandlerPtr = timerHandlerPtr->nextPtr;
} else {
prevPtr->nextPtr = timerHandlerPtr->nextPtr;
}
ckfree((char *) timerHandlerPtr);
return;
}
}
static void
TimerSetupProc(data, flags)
ClientData data;
int flags;
{
Tcl_Time blockTime;
ThreadSpecificData *tsdPtr = InitTimer();
if (((flags & TCL_IDLE_EVENTS) && tsdPtr->idleList)
|| ((flags & TCL_TIMER_EVENTS) && tsdPtr->timerPending)) {
blockTime.sec = 0;
blockTime.usec = 0;
} else if ((flags & TCL_TIMER_EVENTS) && tsdPtr->firstTimerHandlerPtr) {
Tcl_GetTime(&blockTime);
blockTime.sec = tsdPtr->firstTimerHandlerPtr->time.sec - blockTime.sec;
blockTime.usec = tsdPtr->firstTimerHandlerPtr->time.usec -
blockTime.usec;
if (blockTime.usec < 0) {
blockTime.sec -= 1;
blockTime.usec += 1000000;
}
if (blockTime.sec < 0) {
blockTime.sec = 0;
blockTime.usec = 0;
}
} else {
return;
}
Tcl_SetMaxBlockTime(&blockTime);
}
static void
TimerCheckProc(data, flags)
ClientData data;
int flags;
{
Tcl_Event *timerEvPtr;
Tcl_Time blockTime;
ThreadSpecificData *tsdPtr = InitTimer();
if ((flags & TCL_TIMER_EVENTS) && tsdPtr->firstTimerHandlerPtr) {
Tcl_GetTime(&blockTime);
blockTime.sec = tsdPtr->firstTimerHandlerPtr->time.sec - blockTime.sec;
blockTime.usec = tsdPtr->firstTimerHandlerPtr->time.usec -
blockTime.usec;
if (blockTime.usec < 0) {
blockTime.sec -= 1;
blockTime.usec += 1000000;
}
if (blockTime.sec < 0) {
blockTime.sec = 0;
blockTime.usec = 0;
}
if (blockTime.sec == 0 && blockTime.usec == 0 &&
!tsdPtr->timerPending) {
tsdPtr->timerPending = 1;
timerEvPtr = (Tcl_Event *) ckalloc(sizeof(Tcl_Event));
timerEvPtr->proc = TimerHandlerEventProc;
Tcl_QueueEvent(timerEvPtr, TCL_QUEUE_TAIL);
}
}
}
static int
TimerHandlerEventProc(evPtr, flags)
Tcl_Event *evPtr;
int flags;
{
TimerHandler *timerHandlerPtr, **nextPtrPtr;
Tcl_Time time;
int currentTimerId;
ThreadSpecificData *tsdPtr = InitTimer();
if (!(flags & TCL_TIMER_EVENTS)) {
return 0;
}
tsdPtr->timerPending = 0;
currentTimerId = tsdPtr->lastTimerId;
Tcl_GetTime(&time);
while (1) {
nextPtrPtr = &tsdPtr->firstTimerHandlerPtr;
timerHandlerPtr = tsdPtr->firstTimerHandlerPtr;
if (timerHandlerPtr == NULL) {
break;
}
if ((timerHandlerPtr->time.sec > time.sec)
|| ((timerHandlerPtr->time.sec == time.sec)
&& (timerHandlerPtr->time.usec > time.usec))) {
break;
}
if ((currentTimerId - (int)timerHandlerPtr->token) < 0) {
break;
}
(*nextPtrPtr) = timerHandlerPtr->nextPtr;
(*timerHandlerPtr->proc)(timerHandlerPtr->clientData);
ckfree((char *) timerHandlerPtr);
}
TimerSetupProc(NULL, TCL_TIMER_EVENTS);
return 1;
}
void
Tcl_DoWhenIdle(proc, clientData)
Tcl_IdleProc *proc;
ClientData clientData;
{
register IdleHandler *idlePtr;
Tcl_Time blockTime;
ThreadSpecificData *tsdPtr = InitTimer();
idlePtr = (IdleHandler *) ckalloc(sizeof(IdleHandler));
idlePtr->proc = proc;
idlePtr->clientData = clientData;
idlePtr->generation = tsdPtr->idleGeneration;
idlePtr->nextPtr = NULL;
if (tsdPtr->lastIdlePtr == NULL) {
tsdPtr->idleList = idlePtr;
} else {
tsdPtr->lastIdlePtr->nextPtr = idlePtr;
}
tsdPtr->lastIdlePtr = idlePtr;
blockTime.sec = 0;
blockTime.usec = 0;
Tcl_SetMaxBlockTime(&blockTime);
}
void
Tcl_CancelIdleCall(proc, clientData)
Tcl_IdleProc *proc;
ClientData clientData;
{
register IdleHandler *idlePtr, *prevPtr;
IdleHandler *nextPtr;
ThreadSpecificData *tsdPtr = InitTimer();
for (prevPtr = NULL, idlePtr = tsdPtr->idleList; idlePtr != NULL;
prevPtr = idlePtr, idlePtr = idlePtr->nextPtr) {
while ((idlePtr->proc == proc)
&& (idlePtr->clientData == clientData)) {
nextPtr = idlePtr->nextPtr;
ckfree((char *) idlePtr);
idlePtr = nextPtr;
if (prevPtr == NULL) {
tsdPtr->idleList = idlePtr;
} else {
prevPtr->nextPtr = idlePtr;
}
if (idlePtr == NULL) {
tsdPtr->lastIdlePtr = prevPtr;
return;
}
}
}
}
int
TclServiceIdle()
{
IdleHandler *idlePtr;
int oldGeneration;
Tcl_Time blockTime;
ThreadSpecificData *tsdPtr = InitTimer();
if (tsdPtr->idleList == NULL) {
return 0;
}
oldGeneration = tsdPtr->idleGeneration;
tsdPtr->idleGeneration++;
for (idlePtr = tsdPtr->idleList;
((idlePtr != NULL)
&& ((oldGeneration - idlePtr->generation) >= 0));
idlePtr = tsdPtr->idleList) {
tsdPtr->idleList = idlePtr->nextPtr;
if (tsdPtr->idleList == NULL) {
tsdPtr->lastIdlePtr = NULL;
}
(*idlePtr->proc)(idlePtr->clientData);
ckfree((char *) idlePtr);
}
if (tsdPtr->idleList) {
blockTime.sec = 0;
blockTime.usec = 0;
Tcl_SetMaxBlockTime(&blockTime);
}
return 1;
}
int
Tcl_AfterObjCmd(clientData, interp, objc, objv)
ClientData clientData;
Tcl_Interp *interp;
int objc;
Tcl_Obj *CONST objv[];
{
int ms;
AfterInfo *afterPtr;
AfterAssocData *assocPtr = (AfterAssocData *) clientData;
Tcl_CmdInfo cmdInfo;
int length;
char *argString;
int index;
char buf[16 + TCL_INTEGER_SPACE];
static CONST char *afterSubCmds[] = {
"cancel", "idle", "info", (char *) NULL
};
enum afterSubCmds {AFTER_CANCEL, AFTER_IDLE, AFTER_INFO};
ThreadSpecificData *tsdPtr = InitTimer();
if (objc < 2) {
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
return TCL_ERROR;
}
if (assocPtr == NULL) {
assocPtr = (AfterAssocData *) ckalloc(sizeof(AfterAssocData));
assocPtr->interp = interp;
assocPtr->firstAfterPtr = NULL;
Tcl_SetAssocData(interp, "tclAfter", AfterCleanupProc,
(ClientData) assocPtr);
cmdInfo.proc = NULL;
cmdInfo.clientData = (ClientData) NULL;
cmdInfo.objProc = Tcl_AfterObjCmd;
cmdInfo.objClientData = (ClientData) assocPtr;
cmdInfo.deleteProc = NULL;
cmdInfo.deleteData = (ClientData) assocPtr;
Tcl_SetCommandInfo(interp, Tcl_GetStringFromObj(objv[0], &length),
&cmdInfo);
}
if (objv[1]->typePtr == &tclIntType) {
ms = (int) objv[1]->internalRep.longValue;
goto processInteger;
}
argString = Tcl_GetStringFromObj(objv[1], &length);
if (isdigit(UCHAR(argString[0]))) {
if (Tcl_GetIntFromObj(interp, objv[1], &ms) != TCL_OK) {
return TCL_ERROR;
}
processInteger:
if (ms < 0) {
ms = 0;
}
if (objc == 2) {
Tcl_Sleep(ms);
return TCL_OK;
}
afterPtr = (AfterInfo *) ckalloc((unsigned) (sizeof(AfterInfo)));
afterPtr->assocPtr = assocPtr;
if (objc == 3) {
afterPtr->commandPtr = objv[2];
} else {
afterPtr->commandPtr = Tcl_ConcatObj(objc-2, objv+2);
}
Tcl_IncrRefCount(afterPtr->commandPtr);
afterPtr->id = tsdPtr->afterId;
tsdPtr->afterId += 1;
afterPtr->token = Tcl_CreateTimerHandler(ms, AfterProc,
(ClientData) afterPtr);
afterPtr->nextPtr = assocPtr->firstAfterPtr;
assocPtr->firstAfterPtr = afterPtr;
sprintf(buf, "after#%d", afterPtr->id);
Tcl_AppendResult(interp, buf, (char *) NULL);
return TCL_OK;
}
if (Tcl_GetIndexFromObj(NULL, objv[1], afterSubCmds, "argument",
0, &index) != TCL_OK) {
Tcl_AppendResult(interp, "bad argument \"", argString,
"\": must be cancel, idle, info, or a number",
(char *) NULL);
return TCL_ERROR;
}
switch ((enum afterSubCmds) index) {
case AFTER_CANCEL: {
Tcl_Obj *commandPtr;
char *command, *tempCommand;
int tempLength;
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "id|command");
return TCL_ERROR;
}
if (objc == 3) {
commandPtr = objv[2];
} else {
commandPtr = Tcl_ConcatObj(objc-2, objv+2);;
}
command = Tcl_GetStringFromObj(commandPtr, &length);
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
afterPtr = afterPtr->nextPtr) {
tempCommand = Tcl_GetStringFromObj(afterPtr->commandPtr,
&tempLength);
if ((length == tempLength)
&& (memcmp((void*) command, (void*) tempCommand,
(unsigned) length) == 0)) {
break;
}
}
if (afterPtr == NULL) {
afterPtr = GetAfterEvent(assocPtr, commandPtr);
}
if (objc != 3) {
Tcl_DecrRefCount(commandPtr);
}
if (afterPtr != NULL) {
if (afterPtr->token != NULL) {
Tcl_DeleteTimerHandler(afterPtr->token);
} else {
Tcl_CancelIdleCall(AfterProc, (ClientData) afterPtr);
}
FreeAfterPtr(afterPtr);
}
break;
}
case AFTER_IDLE:
if (objc < 3) {
Tcl_WrongNumArgs(interp, 2, objv, "script script ...");
return TCL_ERROR;
}
afterPtr = (AfterInfo *) ckalloc((unsigned) (sizeof(AfterInfo)));
afterPtr->assocPtr = assocPtr;
if (objc == 3) {
afterPtr->commandPtr = objv[2];
} else {
afterPtr->commandPtr = Tcl_ConcatObj(objc-2, objv+2);
}
Tcl_IncrRefCount(afterPtr->commandPtr);
afterPtr->id = tsdPtr->afterId;
tsdPtr->afterId += 1;
afterPtr->token = NULL;
afterPtr->nextPtr = assocPtr->firstAfterPtr;
assocPtr->firstAfterPtr = afterPtr;
Tcl_DoWhenIdle(AfterProc, (ClientData) afterPtr);
sprintf(buf, "after#%d", afterPtr->id);
Tcl_AppendResult(interp, buf, (char *) NULL);
break;
case AFTER_INFO: {
Tcl_Obj *resultListPtr;
if (objc == 2) {
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
afterPtr = afterPtr->nextPtr) {
if (assocPtr->interp == interp) {
sprintf(buf, "after#%d", afterPtr->id);
Tcl_AppendElement(interp, buf);
}
}
return TCL_OK;
}
if (objc != 3) {
Tcl_WrongNumArgs(interp, 2, objv, "?id?");
return TCL_ERROR;
}
afterPtr = GetAfterEvent(assocPtr, objv[2]);
if (afterPtr == NULL) {
Tcl_AppendResult(interp, "event \"", Tcl_GetString(objv[2]),
"\" doesn't exist", (char *) NULL);
return TCL_ERROR;
}
resultListPtr = Tcl_GetObjResult(interp);
Tcl_ListObjAppendElement(interp, resultListPtr, afterPtr->commandPtr);
Tcl_ListObjAppendElement(interp, resultListPtr, Tcl_NewStringObj(
(afterPtr->token == NULL) ? "idle" : "timer", -1));
Tcl_SetObjResult(interp, resultListPtr);
break;
}
default: {
panic("Tcl_AfterObjCmd: bad subcommand index to afterSubCmds");
}
}
return TCL_OK;
}
static AfterInfo *
GetAfterEvent(assocPtr, commandPtr)
AfterAssocData *assocPtr;
Tcl_Obj *commandPtr;
{
char *cmdString;
AfterInfo *afterPtr;
int id;
char *end;
cmdString = Tcl_GetString(commandPtr);
if (strncmp(cmdString, "after#", 6) != 0) {
return NULL;
}
cmdString += 6;
id = strtoul(cmdString, &end, 10);
if ((end == cmdString) || (*end != 0)) {
return NULL;
}
for (afterPtr = assocPtr->firstAfterPtr; afterPtr != NULL;
afterPtr = afterPtr->nextPtr) {
if (afterPtr->id == id) {
return afterPtr;
}
}
return NULL;
}
static void
AfterProc(clientData)
ClientData clientData;
{
AfterInfo *afterPtr = (AfterInfo *) clientData;
AfterAssocData *assocPtr = afterPtr->assocPtr;
AfterInfo *prevPtr;
int result;
Tcl_Interp *interp;
char *script;
int numBytes;
if (assocPtr->firstAfterPtr == afterPtr) {
assocPtr->firstAfterPtr = afterPtr->nextPtr;
} else {
for (prevPtr = assocPtr->firstAfterPtr; prevPtr->nextPtr != afterPtr;
prevPtr = prevPtr->nextPtr) {
}
prevPtr->nextPtr = afterPtr->nextPtr;
}
interp = assocPtr->interp;
Tcl_Preserve((ClientData) interp);
script = Tcl_GetStringFromObj(afterPtr->commandPtr, &numBytes);
result = Tcl_EvalEx(interp, script, numBytes, TCL_EVAL_GLOBAL);
if (result != TCL_OK) {
Tcl_AddErrorInfo(interp, "\n (\"after\" script)");
Tcl_BackgroundError(interp);
}
Tcl_Release((ClientData) interp);
Tcl_DecrRefCount(afterPtr->commandPtr);
ckfree((char *) afterPtr);
}
static void
FreeAfterPtr(afterPtr)
AfterInfo *afterPtr;
{
AfterInfo *prevPtr;
AfterAssocData *assocPtr = afterPtr->assocPtr;
if (assocPtr->firstAfterPtr == afterPtr) {
assocPtr->firstAfterPtr = afterPtr->nextPtr;
} else {
for (prevPtr = assocPtr->firstAfterPtr; prevPtr->nextPtr != afterPtr;
prevPtr = prevPtr->nextPtr) {
}
prevPtr->nextPtr = afterPtr->nextPtr;
}
Tcl_DecrRefCount(afterPtr->commandPtr);
ckfree((char *) afterPtr);
}
static void
AfterCleanupProc(clientData, interp)
ClientData clientData;
Tcl_Interp *interp;
{
AfterAssocData *assocPtr = (AfterAssocData *) clientData;
AfterInfo *afterPtr;
while (assocPtr->firstAfterPtr != NULL) {
afterPtr = assocPtr->firstAfterPtr;
assocPtr->firstAfterPtr = afterPtr->nextPtr;
if (afterPtr->token != NULL) {
Tcl_DeleteTimerHandler(afterPtr->token);
} else {
Tcl_CancelIdleCall(AfterProc, (ClientData) afterPtr);
}
Tcl_DecrRefCount(afterPtr->commandPtr);
ckfree((char *) afterPtr);
}
ckfree((char *) assocPtr);
}