Michael Davidsaver
afafa09547
ioc: check for mis-matched onStartSubscription()/onDisableSubscription() ioc: fix subscription lifetime ioc: catch exceptions in dbEvent callbacks ioc: avoid unnecessary virtual ioc: minor ioc: fix qsrv -S ioc: qsrvGroupSourceInit() catch+log ioc: runOnServer avoid std::function ioc: cleanup and simplifications. Avoid some redundant std::map lookups. Make Group partially const to prevent implicit ctor. ioc: avoid typedefs only used once ioc: overhaul Group::show(). shows triggers ioc: MappingType ioc: pvxsgl -> pvxgl ioc: separate group config singleton from server singleton ioc: remove unnecessary forward declarations ioc: restructure pvxsInitHook ioc: qsrv runtime disable by default ioc: compat w/ older Base ioc: link pvxsIoc w/ DB libs ioc: Channel proper detection of invalid PV ioc: no need to keep vector<dbCommon*> around ioc: fix initial group update for mappings w/o dbChannel ioc: redo testing split out group tests, only run with Base >= 7.0 ioc: minor ioc: loc_bad_alloc ioc: avoid symbol/DTYP clash with pva2pva ioc: test record alias in group json ioc: test put failure when SPC_NOMOD and DISP=1 ioc: test channel filters ioc: unnecessary capture ioc: avoid sharing Value between multiple subscriptions It is possible to create two subscriptions through the same channel. ioc: group subscription include queueSize ioc: eliminate unused atomicMonitor ioc: consolidate GroupSource::get() avoid some indirection ioc: pvRequest override of atomicPutGet ioc: fix group non-atomic put ioc: test asTrap hooks ioc: test putOrder also sets field order ioc: simplify GroupConfigProcessor::loadConfigFiles() Also ensure that groupMapMutex is held ioc: testqgroup cover JSON def. ioc: dbLoadGroup() use macros ioc: pvxsl() take integer argument ioc: display.form and info(Q:form ioc: "NO_ALARM" -> "" ioc: use dbServer at least for informational callbacks. ioc: consolidate createRequestAndSubscriptionHandlers() ioc: eliminate ChannelAndLock properties dbChannel doesn't need a separate DBManyLock ioc: test that putOrder also controls field order ioc: MappingType -> MappingInfo Handle info(Q:time:tag Add +type:"const" ioc: cleanup includes ioc: test dbNotifyCancel() ioc: inline checkForTrailingCommentsAtEnd()
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvxs is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*
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* Author George S. McIntyre <george@level-n.com>, 2023
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*
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*/
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#ifndef PVXS_SUBSCRIPTIONCTX_H
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#define PVXS_SUBSCRIPTIONCTX_H
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#include <memory>
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#include <stdexcept>
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#include <dbEvent.h>
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#include "channel.h"
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#include "dbeventcontextdeleter.h"
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namespace pvxs {
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namespace ioc {
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class Subscription {
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std::shared_ptr<void> sub; // holds void* returned by db_add_event()
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public:
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/* Add a subscription event by calling db_add_event using the given subscriptionCtx
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* and selecting the correct elements based on the given type of event being added.
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* You need to specify the correct options that correspond to the event type.
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* Adds a deleter to clean up the subscription by calling db_cancel_event.
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*/
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void subscribe(void* context,
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const Channel& pChan,
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EVENTFUNC *user_sub, void *user_arg, unsigned select)
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{
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auto chan(pChan); // bind by value
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sub.reset(db_add_event(context, chan,
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user_sub, user_arg, select),
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[chan](void* sub) mutable
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{
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db_cancel_event(sub);
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chan = Channel(); // dbChannel* must outlive subscription
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});
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if(!sub)
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throw std::runtime_error("Failed to create db subscription");
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}
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void enable() {
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if(sub) {
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db_event_enable(sub.get());
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db_post_single_event(sub.get());
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}
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}
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void disable() {
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if(sub)
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db_event_disable(sub.get());
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}
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};
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/**
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* A subscription context
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*/
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class SubscriptionCtx {
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public:
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// For locking access to subscription context
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Subscription pValueEventSubscription;
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Subscription pPropertiesEventSubscription;
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bool hadValueEvent = false;
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bool hadPropertyEvent = false;
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};
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} // ioc
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} // pvxs
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#endif //PVXS_SUBSCRIPTIONCTX_H
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