345f2782cd
Don't assume other code might be using our context. Fix destructor to reattach the right context.
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvAccessCPP 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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#include <cadef.h>
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#include <pv/pvAccess.h>
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#define epicsExportSharedSymbols
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#include "caContext.h"
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namespace epics {
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namespace pvAccess {
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namespace ca {
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CAContext::CAContext()
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{
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ca_client_context *thread_context = ca_current_context();
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if (thread_context)
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ca_detach_context();
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int result = ca_context_create(ca_enable_preemptive_callback);
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if (result != ECA_NORMAL)
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throw std::runtime_error("Can't create CA context");
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this->ca_context = ca_current_context();
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detach(thread_context);
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}
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ca_client_context* CAContext::attach()
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{
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ca_client_context *thread_context = ca_current_context();
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if (thread_context)
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ca_detach_context();
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int result = ca_attach_context(this->ca_context);
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if (result != ECA_NORMAL) {
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if (thread_context) {
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result = ca_attach_context(thread_context);
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if (result != ECA_NORMAL)
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std::cerr << "Lost thread's CA context" << std::endl;
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}
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throw std::runtime_error("Can't attach to my CA context");
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}
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return thread_context;
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}
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void CAContext::detach(ca_client_context* restore) \
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{
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ca_client_context *thread_context = ca_current_context();
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if (thread_context != this->ca_context)
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std::cerr << "CA context was changed!" << std::endl;
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ca_detach_context();
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if (restore) {
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int result = ca_attach_context(restore);
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if (result != ECA_NORMAL)
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std::cerr << "Lost thread's CA context" << std::endl;
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}
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}
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CAContext::~CAContext()
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{
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ca_client_context *thread_context = attach();
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ca_context_destroy();
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if (thread_context) {
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int result = ca_attach_context(thread_context);
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if (result != ECA_NORMAL)
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std::cerr << "Lost thread's CA context" << std::endl;
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}
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}
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}}}
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