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git.ipfire.org Git - thirdparty/squid.git/blob - src/EventLoop.cc
5 * DEBUG: section 1 Main Loop
6 * AUTHOR: Harvest Derived
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36 #include "EventLoop.h"
37 #include "base/AsyncCallQueue.h"
39 EventLoop::EventLoop() : errcount(0), last_loop(false), timeService(NULL
),
44 EventLoop::checkEngine(AsyncEngine
* engine
, bool const primary
)
49 requested_delay
= engine
->checkEvents(0);
51 requested_delay
= engine
->checkEvents(loop_delay
);
53 if (requested_delay
< 0)
54 switch (requested_delay
) {
56 case AsyncEngine::EVENT_IDLE
:
57 debugs(1, 9, "Engine " << engine
<< " is idle.");
60 case AsyncEngine::EVENT_ERROR
:
61 runOnceResult
= false;
66 fatal_dump("unknown AsyncEngine result");
69 /* not idle or error */
70 runOnceResult
= false;
72 if (requested_delay
< loop_delay
)
73 loop_delay
= requested_delay
;
78 EventLoop::prepareToRun()
85 EventLoop::registerEngine(AsyncEngine
*engine
)
87 engines
.push_back(engine
);
101 bool sawActivity
= false;
102 runOnceResult
= true;
104 loop_delay
= EVENT_LOOP_TIMEOUT
;
106 AsyncEngine
*waitingEngine
= primaryEngine
;
107 if (!waitingEngine
&& !engines
.empty())
108 waitingEngine
= engines
.back();
111 // generate calls and events
112 typedef engine_vector::iterator EVI
;
113 for (EVI i
= engines
.begin(); i
!= engines
.end(); ++i
) {
114 if (*i
!= waitingEngine
)
115 checkEngine(*i
, false);
118 // dispatch calls accumulated so far
119 sawActivity
= dispatchCalls();
121 runOnceResult
= false;
122 } while (sawActivity
);
124 if (waitingEngine
!= NULL
)
125 checkEngine(waitingEngine
, true);
127 if (timeService
!= NULL
)
130 // dispatch calls scheduled by waitingEngine and timeService
131 sawActivity
= dispatchCalls();
133 runOnceResult
= false;
137 debugs(1, 0, "Select loop Error. Retry " << errcount
);
147 return runOnceResult
;
150 // dispatches calls accumulated during checkEngine()
152 EventLoop::dispatchCalls()
154 bool dispatchedSome
= AsyncCallQueue::Instance().fire();
155 return dispatchedSome
;
159 EventLoop::setPrimaryEngine(AsyncEngine
* engine
)
161 for (engine_vector::iterator i
= engines
.begin();
162 i
!= engines
.end(); ++i
)
164 primaryEngine
= engine
;
168 fatal("EventLoop::setPrimaryEngine: No such engine!.");
172 EventLoop::setTimeService(TimeEngine
*engine
)
174 timeService
= engine
;