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asynManager.c
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asynManager.c
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/* asynManager.c */
/***********************************************************************
* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
* National Laboratory, and the Regents of the University of
* California, as Operator of Los Alamos National Laboratory, and
* Berliner Elektronenspeicherring-Gesellschaft m.b.H. (BESSY).
* asynDriver is distributed subject to a Software License Agreement
* found in file LICENSE that is included with this distribution.
***********************************************************************/
/* Author: Marty Kraimer */
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
#include <ctype.h>
#include <ellLib.h>
#include <errlog.h>
#include <taskwd.h>
#include <epicsStdio.h>
#include <epicsString.h>
#include <epicsMutex.h>
#include <epicsEvent.h>
#include <epicsThread.h>
#include <epicsTime.h>
#include <epicsTimer.h>
#include <cantProceed.h>
#include <epicsAssert.h>
#include <epicsExport.h>
#include "asynDriver.h"
#define BOOL int
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define ERROR_MESSAGE_SIZE 160
#define NUMBER_QUEUE_PRIORITIES (asynQueuePriorityConnect + 1)
#define DEFAULT_TRACE_TRUNCATE_SIZE 80
#define DEFAULT_TRACE_BUFFER_SIZE 80
#define DEFAULT_SECONDS_BETWEEN_PORT_CONNECT 20
#define DEFAULT_AUTOCONNECT_TIMEOUT 0.5
#define DEFAULT_QUEUE_LOCK_PORT_TIMEOUT 2.0
/* This is taken from dbDefs.h, which we don't want to include */
/* Subtract member byte offset, returning pointer to parent object */
#ifndef CONTAINER
# ifdef __GNUC__
# define CONTAINER(ptr, structure, member) ({ \
const __typeof(((structure*)0)->member) *_ptr = (ptr); \
(structure*)((char*)_ptr - offsetof(structure, member)); \
})
# else
# define CONTAINER(ptr, structure, member) \
((structure*)((char*)(ptr) - offsetof(structure, member)))
# endif
#endif
typedef struct tracePvt tracePvt;
typedef struct userPvt userPvt;
typedef struct port port;
typedef struct device device;
typedef enum {
traceFileErrlog,traceFileStdout,traceFileStderr,traceFileFP
}traceFileType;
struct tracePvt {
int traceMask;
int traceIOMask;
int traceInfoMask;
traceFileType type;
FILE *fp;
size_t traceTruncateSize;
size_t traceBufferSize;
char *traceBuffer;
};
#define nMemList 9
static size_t memListSize[nMemList] =
{16,32,64,128,256,512,1024,2048,4096};
typedef struct memNode {
ELLNODE node;
void *memory;
}memNode;
/*
* Ensure adequate alignment
*/
#define NODESIZE (((sizeof(memNode)+15)/16)*16)
typedef struct asynBase {
ELLLIST asynPortList;
ELLLIST asynUserFreeList;
ELLLIST interruptNodeFree;
epicsTimerQueueId timerQueue;
epicsMutexId lock;
epicsMutexId lockTrace;
tracePvt trace;
ELLLIST memList[nMemList];
/* following for connectPort */
epicsTimerQueueId connectPortTimerQueue;
double autoConnectTimeout;
}asynBase;
static asynBase *pasynBase = 0;
typedef struct interruptBase {
ELLLIST callbackList;
ELLLIST addRemoveList;
BOOL callbackActive;
BOOL listModified;
port *pport;
asynInterface *pasynInterface;
}interruptBase;
typedef struct interruptNodePvt {
ELLNODE addRemoveNode;
BOOL isOnList;
BOOL isOnAddRemoveList;
epicsEventId callbackDone;
interruptBase *pinterruptBase;
interruptNode nodePublic;
}interruptNodePvt;
typedef struct interfaceNode {
ELLNODE node;
asynInterface *pasynInterface;
interruptBase *pinterruptBase;
}interfaceNode;
typedef struct dpCommon { /*device/port common fields*/
BOOL enabled;
BOOL connected;
BOOL autoConnect;
BOOL autoConnectActive;
userPvt *pblockProcessHolder;
ELLLIST interposeInterfaceList;
ELLLIST exceptionUserList;
ELLLIST exceptionNotifyList;
BOOL exceptionActive;
epicsTimeStamp lastConnectDisconnect;
unsigned long numberConnects;
tracePvt trace;
port *pport;
device *pdevice; /* 0 if port.dpc*/
}dpCommon;
typedef struct exceptionUser {
ELLNODE node;
ELLNODE notifyNode;
exceptionCallback callback;
asynUser *pasynUser;
epicsEventId notify;
}exceptionUser;
typedef enum {callbackIdle,callbackActive,callbackCanceled}callbackState;
struct userPvt {
ELLNODE node; /*For asynPort.queueList*/
/* timer,...,state are for queueRequest callbacks*/
epicsTimerId timer;
epicsEventId callbackDone;
userCallback processUser;
userCallback timeoutUser;
double timeout;
callbackState state;
unsigned int blockPortCount;
unsigned int blockDeviceCount;
BOOL isBlockHolder;
port *pport;
device *pdevice;
exceptionUser *pexceptionUser;
BOOL freeAfterCallback;
BOOL isQueued;
asynUser user;
};
struct device {
ELLNODE node; /*For asynPort.deviceList*/
dpCommon dpc;
int addr;
};
typedef enum portConnectStatus {
portConnectSuccess,
portConnectDevice,
portConnectFindInterface,
portConnectDriver
} portConnectStatus;
struct port {
ELLNODE node; /*For asynBase.asynPortList*/
char *portName;
epicsMutexId asynManagerLock; /*for asynManager*/
epicsMutexId synchronousLock; /*for synchronous drivers*/
dpCommon dpc;
ELLLIST deviceList;
ELLLIST interfaceList;
int attributes;
/* The following are for autoConnect*/
asynUser *pasynUser;
double secondsBetweenPortConnect;
portConnectStatus previousConnectStatus;
/* The following are for asynLockPortNotify */
asynLockPortNotify *pasynLockPortNotify;
void *lockPortNotifyPvt;
/*The following are only initialized/used if attributes&ASYN_CANBLOCK*/
ELLLIST queueList[NUMBER_QUEUE_PRIORITIES];
BOOL queueStateChange;
epicsEventId notifyPortThread;
epicsThreadId threadid;
userPvt *pblockProcessHolder;
/* following are for portConnect */
asynUser *pconnectUser;
asynInterface *pcommonInterface;
epicsTimerId connectTimer;
epicsThreadPrivateId queueLockPortId;
double queueLockPortTimeout;
/* The following are for timestamp support */
epicsTimeStamp timeStamp;
timeStampCallback timeStampSource;
void *timeStampPvt;
};
typedef struct queueLockPortPvt {
epicsEventId queueLockPortEvent;
epicsMutexId queueLockPortMutex;
unsigned int queueLockPortCount;
}queueLockPortPvt;
#define interruptNodeToPvt(pinterruptNode) \
((interruptNodePvt *) ((char *)(pinterruptNode) \
- ( (char *)&(((interruptNodePvt *)0)->nodePublic) - (char *)0 ) ) )
#define userPvtToAsynUser(p) (&p->user)
#define asynUserToUserPvt(p) \
((userPvt *) ((char *)(p) \
- ( (char *)&(((userPvt *)0)->user) - (char *)0 ) ) )
#define notifyNodeToExceptionUser(p) \
((exceptionUser *) ((char *)(p) \
- ( (char *)&(((exceptionUser *)0)->notifyNode) - (char *)0 ) ) )
/* internal methods */
static void tracePvtInit(tracePvt *ptracePvt);
static void tracePvtFree(tracePvt *ptracePvt);
static void asynInit(void);
static void dpCommonInit(port *pport,device *pdevice,BOOL autoConnect);
static void dpCommonFree(dpCommon *pdpCommon);
static dpCommon *findDpCommon(userPvt *puserPvt);
static tracePvt *findTracePvt(userPvt *puserPvt);
static port *locatePort(const char *portName);
static device *locateDevice(port *pport,int addr,BOOL allocNew);
static interfaceNode *locateInterfaceNode(
ELLLIST *plist,const char *interfaceType,BOOL allocNew);
static void exceptionOccurred(asynUser *pasynUser,asynException exception);
static void queueTimeoutCallback(void *pvt);
/*autoConnectDevice must be called with asynManagerLock held*/
static BOOL autoConnectDevice(port *pport,device *pdevice);
static void connectAttempt(dpCommon *pdpCommon);
static void portThread(port *pport);
/* functions for portConnect */
static void initPortConnect(port *ppport);
static void portConnectTimerCallback(void *pvt);
static void portConnectProcessCallback(asynUser *pasynUser);
/* asynManager methods */
static void report(FILE *fp,int details,const char*portName);
static asynUser *createAsynUser(userCallback process, userCallback timeout);
static asynUser *duplicateAsynUser(asynUser *pasynUser,
userCallback queue, userCallback timeout);
static asynStatus freeAsynUser(asynUser *pasynUser);
static void *memMalloc(size_t size);
static void memFree(void *pmem,size_t size);
static asynStatus isMultiDevice(asynUser *pasynUser,
const char *portName,int *yesNo);
static asynStatus connectDevice(asynUser *pasynUser,
const char *portName,int addr);
static asynStatus disconnect(asynUser *pasynUser);
static asynStatus exceptionCallbackAdd(asynUser *pasynUser,
exceptionCallback callback);
static asynStatus exceptionCallbackRemove(asynUser *pasynUser);
static asynInterface *findInterface(asynUser *pasynUser,
const char *interfaceType,int interposeInterfaceOK);
static asynStatus queueRequest(asynUser *pasynUser,
asynQueuePriority priority,double timeout);
static asynStatus cancelRequest(asynUser *pasynUser,int *wasQueued);
static asynStatus blockProcessCallback(asynUser *pasynUser, int allDevices);
static asynStatus unblockProcessCallback(asynUser *pasynUser, int allDevices);
static asynStatus lockPort(asynUser *pasynUser);
static asynStatus unlockPort(asynUser *pasynUser);
static asynStatus queueLockPort(asynUser *pasynUser);
static asynStatus queueUnlockPort(asynUser *pasynUser);
static asynStatus setQueueLockPortTimeout(asynUser *pasynUser, double timeout);
static asynStatus canBlock(asynUser *pasynUser,int *yesNo);
static asynStatus getAddr(asynUser *pasynUser,int *addr);
static asynStatus getPortName(asynUser *pasynUser,const char **pportName);
static asynStatus registerPort(const char *portName,
int attributes,int autoConnect,
unsigned int priority,unsigned int stackSize);
static asynStatus registerInterface(const char *portName,
asynInterface *pasynInterface);
static asynStatus exceptionConnect(asynUser *pasynUser);
static asynStatus exceptionDisconnect(asynUser *pasynUser);
static asynStatus interposeInterface(const char *portName, int addr,
asynInterface *pasynInterface,asynInterface **ppPrev);
static asynStatus enable(asynUser *pasynUser,int yesNo);
static asynStatus autoConnectAsyn(asynUser *pasynUser,int yesNo);
static asynStatus isConnected(asynUser *pasynUser,int *yesNo);
static asynStatus isEnabled(asynUser *pasynUser,int *yesNo);
static asynStatus isAutoConnect(asynUser *pasynUser,int *yesNo);
static asynStatus setAutoConnectTimeout(double timeout);
static asynStatus waitConnect(asynUser *pasynUser, double timeout);
static asynStatus registerInterruptSource(const char *portName,
asynInterface *pasynInterface, void **pasynPvt);
static asynStatus getInterruptPvt(asynUser *pasynUser,
const char *interfaceType, void **pasynPvt);
static interruptNode *createInterruptNode(void *pasynPvt);
static asynStatus freeInterruptNode(asynUser *pasynUser,interruptNode *pnode);
static asynStatus addInterruptUser(asynUser *pasynUser,
interruptNode*pinterruptNode);
static asynStatus removeInterruptUser(asynUser *pasynUser,
interruptNode*pinterruptNode);
static asynStatus interruptStart(void *pasynPvt,ELLLIST **plist);
static asynStatus interruptEnd(void *pasynPvt);
static void defaultTimeStampSource(void *userPvt, epicsTimeStamp *pTimeStamp);
static asynStatus registerTimeStampSource(asynUser *pasynUser, void *userPvt, timeStampCallback callback);
static asynStatus unregisterTimeStampSource(asynUser *pasynUser);
static asynStatus updateTimeStamp(asynUser *pasynUser);
static asynStatus getTimeStamp(asynUser *pasynUser, epicsTimeStamp *pTimeStamp);
static asynStatus setTimeStamp(asynUser *pasynUser, const epicsTimeStamp *pTimeStamp);
static const char *strStatus(asynStatus status);
static asynManager manager = {
report,
createAsynUser,
duplicateAsynUser,
freeAsynUser,
memMalloc,
memFree,
isMultiDevice,
connectDevice,
disconnect,
exceptionCallbackAdd,
exceptionCallbackRemove,
findInterface,
queueRequest,
cancelRequest,
blockProcessCallback,
unblockProcessCallback,
lockPort,
unlockPort,
queueLockPort,
queueUnlockPort,
setQueueLockPortTimeout,
canBlock,
getAddr,
getPortName,
registerPort,
registerInterface,
exceptionConnect,
exceptionDisconnect,
interposeInterface,
enable,
autoConnectAsyn,
isConnected,
isEnabled,
isAutoConnect,
setAutoConnectTimeout,
waitConnect,
registerInterruptSource,
getInterruptPvt,
createInterruptNode,
freeInterruptNode,
addInterruptUser,
removeInterruptUser,
interruptStart,
interruptEnd,
registerTimeStampSource,
unregisterTimeStampSource,
updateTimeStamp,
getTimeStamp,
setTimeStamp,
strStatus
};
asynManager *pasynManager = &manager;
/* asynTrace methods */
static asynStatus traceLock(asynUser *pasynUser);
static asynStatus traceUnlock(asynUser *pasynUser);
static asynStatus setTraceMask(asynUser *pasynUser,int mask);
static int getTraceMask(asynUser *pasynUser);
static asynStatus setTraceIOMask(asynUser *pasynUser,int mask);
static int getTraceIOMask(asynUser *pasynUser);
static asynStatus setTraceInfoMask(asynUser *pasynUser,int mask);
static int getTraceInfoMask(asynUser *pasynUser);
static asynStatus setTraceFile(asynUser *pasynUser,FILE *fp);
static FILE *getTraceFile(asynUser *pasynUser);
static asynStatus setTraceIOTruncateSize(asynUser *pasynUser,size_t size);
static size_t getTraceIOTruncateSize(asynUser *pasynUser);
static int tracePrint(asynUser *pasynUser,
int reason, const char *pformat, ...);
static int tracePrintSource(asynUser *pasynUser,
int reason, const char *file, int line, const char *pformat, ...);
static int traceVprint(asynUser *pasynUser,
int reason, const char *pformat, va_list pvar);
static int traceVprintSource(asynUser *pasynUser,
int reason, const char *file, int line, const char *pformat, va_list pvar);
static int tracePrintIO(asynUser *pasynUser,int reason,
const char *buffer, size_t len,const char *pformat, ...);
static int tracePrintIOSource(asynUser *pasynUser,int reason,
const char *buffer, size_t len, const char *file, int line, const char *pformat, ...);
static int traceVprintIO(asynUser *pasynUser,int reason,
const char *buffer, size_t len,const char *pformat, va_list pvar);
static int traceVprintIOSource(asynUser *pasynUser,int reason,
const char *buffer, size_t len, const char *file, int line, const char *pformat, va_list pvar);
static asynTrace asynTraceManager = {
traceLock,
traceUnlock,
setTraceMask,
getTraceMask,
setTraceIOMask,
getTraceIOMask,
setTraceInfoMask,
getTraceInfoMask,
setTraceFile,
getTraceFile,
setTraceIOTruncateSize,
getTraceIOTruncateSize,
tracePrint,
tracePrintSource,
traceVprint,
traceVprintSource,
tracePrintIO,
tracePrintIOSource,
traceVprintIO,
traceVprintIOSource
};
asynTrace *pasynTrace = &asynTraceManager;
/*internal methods */
static void tracePvtInit(tracePvt *ptracePvt)
{
ptracePvt->traceBuffer = callocMustSucceed(
DEFAULT_TRACE_BUFFER_SIZE,sizeof(char),
"asynManager:tracePvtInit");
ptracePvt->traceMask = ASYN_TRACE_ERROR;
ptracePvt->traceInfoMask = ASYN_TRACEINFO_TIME;
ptracePvt->traceTruncateSize = DEFAULT_TRACE_TRUNCATE_SIZE;
ptracePvt->traceBufferSize = DEFAULT_TRACE_BUFFER_SIZE;
ptracePvt->type = traceFileStderr;
}
static void tracePvtFree(tracePvt *ptracePvt)
{
assert(ptracePvt->fp==0);
free(ptracePvt->traceBuffer);
}
static void reportConnectStatus(port *pport, portConnectStatus status, const char *fmt, ...)
{
va_list args;
if (pport->previousConnectStatus != status) {
pport->previousConnectStatus = status;
va_start(args, fmt);
pasynTrace->vprint(pport->pasynUser, ASYN_TRACE_ERROR, fmt, args);
va_end(args);
}
}
static const char *asynStripPath(const char *file)
{
const char *ret = strrchr(file, '/');
if (ret) return ret + 1;
#if (defined(CYGWIN32) || defined(_WIN32))
ret = strrchr(file, '\\');
if (ret) return ret + 1;
#endif
return file;
}
static void asynInit(void)
{
int i;
if(pasynBase) return;
pasynBase = callocMustSucceed(1,sizeof(asynBase),"asynInit");
ellInit(&pasynBase->asynPortList);
ellInit(&pasynBase->asynUserFreeList);
ellInit(&pasynBase->interruptNodeFree);
pasynBase->timerQueue = epicsTimerQueueAllocate(
1,epicsThreadPriorityScanLow);
pasynBase->lock = epicsMutexMustCreate();
pasynBase->lockTrace = epicsMutexMustCreate();
tracePvtInit(&pasynBase->trace);
for(i=0; i<nMemList; i++) ellInit(&pasynBase->memList[i]);
pasynBase->connectPortTimerQueue = epicsTimerQueueAllocate(
0,epicsThreadPriorityScanLow);
pasynBase->autoConnectTimeout = DEFAULT_AUTOCONNECT_TIMEOUT;
}
static void dpCommonInit(port *pport,device *pdevice,BOOL autoConnect)
{
dpCommon *pdpCommon;
if(pdevice) {
pdpCommon = &pdevice->dpc;
} else {
pdpCommon = &pport->dpc;
}
pdpCommon->enabled = TRUE;
pdpCommon->connected = FALSE;
pdpCommon->autoConnect = autoConnect;
ellInit(&pdpCommon->interposeInterfaceList);
ellInit(&pdpCommon->exceptionUserList);
ellInit(&pdpCommon->exceptionNotifyList);
pdpCommon->pport = pport;
pdpCommon->pdevice = pdevice;
tracePvtInit(&pdpCommon->trace);
}
static void dpCommonFree(dpCommon *pdpCommon)
{
tracePvtFree(&pdpCommon->trace);
}
static dpCommon *findDpCommon(userPvt *puserPvt)
{
port *pport = puserPvt->pport;
device *pdevice = puserPvt->pdevice;
if(!pport) return(0);
if(!(pport->attributes&ASYN_MULTIDEVICE) || !pdevice) return(&pport->dpc);
return(&pdevice->dpc);
}
static tracePvt *findTracePvt(userPvt *puserPvt)
{
dpCommon *pdpCommon = findDpCommon(puserPvt);
if(pdpCommon) return(&pdpCommon->trace);
return(&pasynBase->trace);
}
/*locatePort returns 0 if portName is not registered*/
static port *locatePort(const char *portName)
{
port *pport;
if(!pasynBase) asynInit();
epicsMutexMustLock(pasynBase->lock);
pport = (port *)ellFirst(&pasynBase->asynPortList);
while(pport) {
if(strcmp(pport->portName,portName)==0) break;
pport = (port *)ellNext(&pport->node);
}
epicsMutexUnlock(pasynBase->lock);
return pport;
}
static device *locateDevice(port *pport,int addr,BOOL allocNew)
{
device *pdevice;
assert(pport);
if(!(pport->attributes&ASYN_MULTIDEVICE) || addr < 0) return(0);
pdevice = (device *)ellFirst(&pport->deviceList);
while(pdevice) {
if(pdevice->addr == addr) return pdevice;
pdevice = (device *)ellNext(&pdevice->node);
}
if(!pdevice && allocNew) {
pdevice = callocMustSucceed(1,sizeof(device),
"asynManager:locateDevice");
pdevice->addr = addr;
dpCommonInit(pport,pdevice,pport->dpc.autoConnect);
ellAdd(&pport->deviceList,&pdevice->node);
}
return pdevice;
}
static interfaceNode *locateInterfaceNode(
ELLLIST *plist,const char *interfaceType,BOOL allocNew)
{
interfaceNode *pinterfaceNode;
pinterfaceNode = (interfaceNode *)ellFirst(plist);
while(pinterfaceNode) {
asynInterface *pif = pinterfaceNode->pasynInterface;
if(strcmp(pif->interfaceType,interfaceType)==0) break;
pinterfaceNode = (interfaceNode *)ellNext(&pinterfaceNode->node);
}
if(!pinterfaceNode && allocNew) {
pinterfaceNode = callocMustSucceed(1,sizeof(interfaceNode),
"asynManager::locateInterfaceNode");
ellAdd(plist,&pinterfaceNode->node);
}
return pinterfaceNode;
}
/* While an exceptionActive exceptionCallbackAdd and exceptionCallbackRemove
will wait to be notified that exceptionActive is no longer true. */
static void announceExceptionOccurred(port *pport, device *pdevice, asynException exception)
{
dpCommon *pdpCommon = (pdevice ? &pdevice->dpc : &pport->dpc);
exceptionUser *pexceptionUser;
ELLNODE *pn;
assert(pport&&pdpCommon);
epicsMutexMustLock(pport->asynManagerLock);
pdpCommon->exceptionActive = TRUE;
epicsMutexUnlock(pport->asynManagerLock);
pexceptionUser = (exceptionUser *)ellFirst(&pdpCommon->exceptionUserList);
while(pexceptionUser) {
pexceptionUser->callback(pexceptionUser->pasynUser,exception);
pexceptionUser = (exceptionUser *)ellNext(&pexceptionUser->node);
}
epicsMutexMustLock(pport->asynManagerLock);
while((pn = ellFirst(&pdpCommon->exceptionNotifyList))) {
pexceptionUser = CONTAINER(pn, exceptionUser, notifyNode);
epicsEventSignal(pexceptionUser->notify);
ellDelete(&pdpCommon->exceptionNotifyList,&pexceptionUser->notifyNode);
}
pdpCommon->exceptionActive = FALSE;
pport->queueStateChange = TRUE;
epicsMutexUnlock(pport->asynManagerLock);
if(pport->attributes&ASYN_CANBLOCK)
epicsEventSignal(pport->notifyPortThread);
}
static void exceptionOccurred(asynUser *pasynUser,asynException exception)
{
userPvt *puserPvt = asynUserToUserPvt(pasynUser);
port *pport = puserPvt->pport;
device *pdevice = puserPvt->pdevice;
announceExceptionOccurred(pport, pdevice, exception);
}
static void queueTimeoutCallback(void *pvt)
{
userPvt *puserPvt = (userPvt *)pvt;
asynUser *pasynUser = &puserPvt->user;
port *pport = puserPvt->pport;
int i;
epicsMutexMustLock(pport->asynManagerLock);
if(!puserPvt->isQueued) {
epicsMutexUnlock(pport->asynManagerLock);
asynPrint(pasynUser,ASYN_TRACE_FLOW,
"%s asynManager:queueTimeoutCallback but not queued\n",
pport->portName );
return;
}
for(i=asynQueuePriorityConnect; i>=asynQueuePriorityLow; i--) {
puserPvt = (userPvt *)ellFirst(&pport->queueList[i]);
while(puserPvt) {
if(pasynUser == &puserPvt->user) {
ellDelete(&pport->queueList[i],&puserPvt->node);
break;
}
puserPvt = (userPvt *)ellNext(&puserPvt->node);
}
if (puserPvt) break;
}
if(!puserPvt) {
epicsMutexUnlock(pport->asynManagerLock);
asynPrint(pasynUser,ASYN_TRACE_ERROR,
"%s asynManager:queueTimeoutCallback LOGIC ERROR\n",
pport->portName);
return;
}
asynPrint(pasynUser,ASYN_TRACE_FLOW,
"%s asynManager:queueTimeoutCallback\n", pport->portName);
puserPvt->isQueued = FALSE;
pport->queueStateChange = TRUE;
if(puserPvt->timeoutUser) {
puserPvt->state = callbackActive;
epicsMutexUnlock(pport->asynManagerLock);
puserPvt->timeoutUser(pasynUser);
epicsMutexMustLock(pport->asynManagerLock);
if(puserPvt->state==callbackCanceled)
epicsEventSignal(puserPvt->callbackDone);
puserPvt->state = callbackIdle;
if(puserPvt->freeAfterCallback) {
puserPvt->freeAfterCallback = FALSE;
epicsMutexMustLock(pasynBase->lock);
ellAdd(&pasynBase->asynUserFreeList,&puserPvt->node);
epicsMutexUnlock(pasynBase->lock);
}
}
epicsMutexUnlock(pport->asynManagerLock);
epicsEventSignal(pport->notifyPortThread);
}
/*autoConnectDevice must be called with asynManagerLock held*/
static BOOL autoConnectDevice(port *pport,device *pdevice)
{
if(!pport->dpc.connected
&& pport->dpc.autoConnect
&& !pport->dpc.autoConnectActive) {
epicsTimeStamp now;
epicsTimeGetCurrent(&now);
if(epicsTimeDiffInSeconds(
&now,&pport->dpc.lastConnectDisconnect) < 2.0) return FALSE;
pport->dpc.autoConnectActive = TRUE;
epicsMutexUnlock(pport->asynManagerLock);
connectAttempt(&pport->dpc);
epicsMutexMustLock(pport->asynManagerLock);
epicsTimeGetCurrent(&pport->dpc.lastConnectDisconnect);
pport->dpc.autoConnectActive = FALSE;
}
if(!pport->dpc.connected) return FALSE;
if(!pdevice) return TRUE;
if(!pdevice->dpc.connected
&& pdevice->dpc.autoConnect
&& !pdevice->dpc.autoConnectActive) {
epicsTimeStamp now;
epicsTimeGetCurrent(&now);
if(epicsTimeDiffInSeconds(
&now,&pdevice->dpc.lastConnectDisconnect) < 2.0) return FALSE;
pdevice->dpc.autoConnectActive = TRUE;
epicsMutexUnlock(pport->asynManagerLock);
connectAttempt(&pdevice->dpc);
epicsMutexMustLock(pport->asynManagerLock);
epicsTimeGetCurrent(&pdevice->dpc.lastConnectDisconnect);
pdevice->dpc.autoConnectActive = FALSE;
}
return pdevice->dpc.connected;
}
static void connectAttempt(dpCommon *pdpCommon)
{
port *pport = pdpCommon->pport;
device *pdevice = pdpCommon->pdevice;
asynUser *pasynUser = pport->pasynUser;
asynInterface *pasynInterface;
asynCommon *pasynCommon = 0;
void *drvPvt = 0;
asynStatus status;
int addr;
addr = (pdevice ? pdevice->addr : -1);
status = pasynManager->connectDevice(pasynUser,pport->portName,addr);
if(status!=asynSuccess) {
reportConnectStatus(pport, portConnectDevice,
"%s %d autoConnect connectDevice failed.\n",
pport->portName,addr);
return;
}
pasynInterface = pasynManager->findInterface(pasynUser,asynCommonType,TRUE);
if(!pasynInterface) {
reportConnectStatus(pport, portConnectFindInterface,
"%s %d autoConnect findInterface for asynCommon failed.\n",
pport->portName,addr);
goto disconnect;
}
pasynCommon = (asynCommon *)pasynInterface->pinterface;
drvPvt = pasynInterface->drvPvt;
asynPrint(pasynUser,ASYN_TRACE_FLOW,
"%s %d autoConnect\n",pport->portName,addr);
pasynUser->errorMessage[0] = '\0';
/* When we were called we were not connected, but we could have connected since that test? */
if (!pdpCommon->connected) {
epicsMutexMustLock(pport->synchronousLock);
status = pasynCommon->connect(drvPvt,pasynUser);
epicsMutexUnlock(pport->synchronousLock);
if (status != asynSuccess) {
reportConnectStatus(pport, portConnectDriver,
"%s %d autoConnect could not connect: %s\n", pport->portName, addr, pasynUser->errorMessage);
} else {
reportConnectStatus(pport, portConnectSuccess,
"%s %d port is now connected\n",
pport->portName, addr);
}
}
disconnect:
status = pasynManager->disconnect(pasynUser);
if(status!=asynSuccess) {
asynPrint(pasynUser, ASYN_TRACE_ERROR,
"%s %d autoConnect disconnect failed.\n",
pport->portName,addr);
}
}
static void portThread(port *pport)
{
userPvt *puserPvt;
asynUser *pasynUser;
double timeout;
BOOL callTimeoutUser = FALSE;
taskwdInsert(epicsThreadGetIdSelf(),0,0);
while(1) {
epicsEventMustWait(pport->notifyPortThread);
epicsMutexMustLock(pport->asynManagerLock);
if(!pport->dpc.enabled) {
epicsMutexUnlock(pport->asynManagerLock);
continue;
}
/*Process ALL connect/disconnect requests first*/
while((puserPvt = (userPvt *)ellFirst(
&pport->queueList[asynQueuePriorityConnect]))) {
asynStatus status = asynSuccess;
assert(puserPvt->isQueued);
ellDelete(&pport->queueList[asynQueuePriorityConnect],
&puserPvt->node);
puserPvt->isQueued = FALSE;
pasynUser = userPvtToAsynUser(puserPvt);
pasynUser->errorMessage[0] = '\0';
asynPrint(pasynUser,ASYN_TRACE_FLOW,
"asynManager connect queueCallback port:%s\n",
pport->portName);
puserPvt->state = callbackActive;
timeout = puserPvt->timeout;
epicsMutexUnlock(pport->asynManagerLock);
if(puserPvt->timer && timeout>0.0) epicsTimerCancel(puserPvt->timer);
epicsMutexMustLock(pport->synchronousLock);
if(pport->pasynLockPortNotify) {
status = pport->pasynLockPortNotify->lock(
pport->lockPortNotifyPvt,pasynUser);
if(status!=asynSuccess) asynPrint(pasynUser,ASYN_TRACE_ERROR,
"%s queueCallback pasynLockPortNotify:lock error %s\n",
pport->portName,pasynUser->errorMessage);
}
puserPvt->processUser(pasynUser);
if(pport->pasynLockPortNotify) {
status = pport->pasynLockPortNotify->unlock(
pport->lockPortNotifyPvt,pasynUser);
if(status!=asynSuccess) asynPrint(pasynUser,ASYN_TRACE_ERROR,
"%s queueCallback pasynLockPortNotify:lock error %s\n",
pport->portName,pasynUser->errorMessage);
}
epicsMutexUnlock(pport->synchronousLock);
epicsMutexMustLock(pport->asynManagerLock);
if (puserPvt->state==callbackCanceled)
epicsEventSignal(puserPvt->callbackDone);
puserPvt->state = callbackIdle;
if(puserPvt->freeAfterCallback) {
puserPvt->freeAfterCallback = FALSE;
epicsMutexMustLock(pasynBase->lock);
ellAdd(&pasynBase->asynUserFreeList,&puserPvt->node);
epicsMutexUnlock(pasynBase->lock);
}
}
if(!pport->dpc.connected) {
if(!autoConnectDevice(pport,0)) {
epicsMutexUnlock(pport->asynManagerLock);
continue; /*while (1); */
}
}
while(1) {
int i;
dpCommon *pdpCommon = 0;
asynStatus status = asynSuccess;
callTimeoutUser = FALSE;
pport->queueStateChange = FALSE;
for(i=asynQueuePriorityHigh; i>=asynQueuePriorityLow; i--) {
for(puserPvt = (userPvt *)ellFirst(&pport->queueList[i]);
puserPvt; puserPvt = (userPvt *)ellNext(&puserPvt->node)) {
pdpCommon = findDpCommon(puserPvt);
assert(pdpCommon);
if(!pdpCommon->enabled) continue;
if(!pdpCommon->connected) {
autoConnectDevice(pdpCommon->pport,
pdpCommon->pdevice);
if(pport->queueStateChange) {
puserPvt = 0;
break;
}
}
if(!pdpCommon->connected && puserPvt->timeoutUser!=0) {
callTimeoutUser = TRUE;
}
if((pport->pblockProcessHolder==NULL
|| pport->pblockProcessHolder==puserPvt)
&& (pdpCommon->pblockProcessHolder==NULL
|| pdpCommon->pblockProcessHolder==puserPvt)) {
assert(puserPvt->isQueued);
ellDelete(&pport->queueList[i],&puserPvt->node);
puserPvt->isQueued = FALSE;
break;
}
}
if(puserPvt || pport->queueStateChange) break; /*for*/
}
if(!puserPvt) break; /*while(1)*/
pasynUser = userPvtToAsynUser(puserPvt);
pasynUser->errorMessage[0] = '\0';
asynPrint(pasynUser,ASYN_TRACE_FLOW,"asynManager::portThread port=%s callback\n",pport->portName);
puserPvt->state = callbackActive;
timeout = puserPvt->timeout;
epicsMutexUnlock(pport->asynManagerLock);
if(puserPvt->timer && timeout>0.0) epicsTimerCancel(puserPvt->timer);
epicsMutexMustLock(pport->synchronousLock);
if(pport->pasynLockPortNotify) {
status = pport->pasynLockPortNotify->lock(
pport->lockPortNotifyPvt,pasynUser);
if(status!=asynSuccess) asynPrint(pasynUser,ASYN_TRACE_ERROR,
"%s queueCallback pasynLockPortNotify:lock error %s\n",
pport->portName,pasynUser->errorMessage);
}
if(callTimeoutUser) {
puserPvt->timeoutUser(pasynUser);
} else {
puserPvt->processUser(pasynUser);
}
if(pport->pasynLockPortNotify) {
status = pport->pasynLockPortNotify->unlock(
pport->lockPortNotifyPvt,pasynUser);
if(status!=asynSuccess) asynPrint(pasynUser,ASYN_TRACE_ERROR,
"%s queueCallback pasynLockPortNotify:lock error %s\n",
pport->portName,pasynUser->errorMessage);
}
epicsMutexUnlock(pport->synchronousLock);
epicsMutexMustLock(pport->asynManagerLock);
if(puserPvt->blockPortCount>0)
pport->pblockProcessHolder = puserPvt;
if(puserPvt->blockDeviceCount>0)
pdpCommon->pblockProcessHolder = puserPvt;
if(puserPvt->state==callbackCanceled)
epicsEventSignal(puserPvt->callbackDone);
puserPvt->state = callbackIdle;
if(puserPvt->freeAfterCallback) {
puserPvt->freeAfterCallback = FALSE;
epicsMutexMustLock(pasynBase->lock);
ellAdd(&pasynBase->asynUserFreeList,&puserPvt->node);
epicsMutexUnlock(pasynBase->lock);
}
if(pport->queueStateChange) break;
}
epicsMutexUnlock(pport->asynManagerLock);
}
}
static void queueLockPortCallback(asynUser *pasynUser)
{
userPvt *puserPvt = asynUserToUserPvt(pasynUser);
port *pport = puserPvt->pport;
queueLockPortPvt *plockPortPvt = pasynUser->userPvt;
/* Signal the epicsEvent to let the waiting thread we have been called */
asynPrint(pasynUser, ASYN_TRACE_FLOW,
"%s asynManager::queueLockPortCallback signaling begin event\n",
pport->portName);
epicsEventSignal(plockPortPvt->queueLockPortEvent);
/* Wait for mutex from queueUnlockPort */
asynPrint(pasynUser, ASYN_TRACE_FLOW,
"%s asynManager::queueLockPortCallback waiting for mutex from queueUnlockPort\n",
pport->portName);
epicsMutexMustLock(plockPortPvt->queueLockPortMutex);
epicsMutexUnlock(plockPortPvt->queueLockPortMutex);
asynPrint(pasynUser, ASYN_TRACE_FLOW,
"%s asynManager::queueLockPortCallback got mutex from queueUnlockPort, signaling end event\n",
pport->portName);
epicsEventSignal(plockPortPvt->queueLockPortEvent);
}
static void queueLockPortTimeoutCallback(asynUser *pasynUser)
{
userPvt *puserPvt = asynUserToUserPvt(pasynUser);
port *pport = puserPvt->pport;
queueLockPortPvt *plockPortPvt = pasynUser->userPvt;
asynPrint(pasynUser, ASYN_TRACE_WARNING,
"%s asynManager::queueLockPortTimeoutCallback WARNING: queueLockPort timeout\n",
pport->portName);
/* Set the pasynUser->auxStatus to asynTimeout to signal error to caller */
pasynUser->auxStatus = asynTimeout;
/* Signal the epicsEvent to let the waiting thread we have been called */
asynPrint(pasynUser, ASYN_TRACE_FLOW,
"%s asynManager::queueLockPortTimeoutCallback signaling begin event\n",
pport->portName);
epicsEventSignal(plockPortPvt->queueLockPortEvent);
/* queueUnlockPort is not going to be called because queueLockPort will have returned an error */
};
/* asynManager methods */
static void reportPrintInterfaceList(FILE *fp,ELLLIST *plist,const char *title)
{
interfaceNode *pinterfaceNode = (interfaceNode *)ellFirst(plist);
if(pinterfaceNode) fprintf(fp," %s\n",title);
while(pinterfaceNode) {
asynInterface *pasynInterface = pinterfaceNode->pasynInterface;
fprintf(fp," %s pinterface %p drvPvt %p\n",
pasynInterface->interfaceType, pasynInterface->pinterface,
pasynInterface->drvPvt);
pinterfaceNode = (interfaceNode *)ellNext(&pinterfaceNode->node);
}
}