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// Copyright (c) 2011-2012 Ryan Prichard
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
#include "EventLoop.h"
#include <algorithm>
#include "NamedPipe.h"
#include "../shared/DebugClient.h"
#include "../shared/WinptyAssert.h"
EventLoop::~EventLoop() {
for (NamedPipe *pipe : m_pipes) {
delete pipe;
}
m_pipes.clear();
}
// Enter the event loop. Runs until the I/O or timeout handler calls exit().
void EventLoop::run()
{
std::vector<HANDLE> waitHandles;
DWORD lastTime = GetTickCount();
while (!m_exiting) {
bool didSomething = false;
// Attempt to make progress with the pipes.
waitHandles.clear();
for (size_t i = 0; i < m_pipes.size(); ++i) {
if (m_pipes[i]->serviceIo(&waitHandles)) {
onPipeIo(*m_pipes[i]);
didSomething = true;
}
}
// Call the timeout if enough time has elapsed.
if (m_pollInterval > 0) {
int elapsed = GetTickCount() - lastTime;
if (elapsed >= m_pollInterval) {
onPollTimeout();
lastTime = GetTickCount();
didSomething = true;
}
}
if (didSomething)
continue;
// If there's nothing to do, wait.
DWORD timeout = INFINITE;
if (m_pollInterval > 0)
timeout = std::max(0, (int)(lastTime + m_pollInterval - GetTickCount()));
if (waitHandles.size() == 0) {
ASSERT(timeout != INFINITE);
if (timeout > 0)
Sleep(timeout);
} else {
DWORD result = WaitForMultipleObjects(waitHandles.size(),
waitHandles.data(),
FALSE,
timeout);
ASSERT(result != WAIT_FAILED);
}
}
}
NamedPipe &EventLoop::createNamedPipe()
{
NamedPipe *ret = new NamedPipe();
m_pipes.push_back(ret);
return *ret;
}
void EventLoop::setPollInterval(int ms)
{
m_pollInterval = ms;
}
void EventLoop::shutdown()
{
m_exiting = true;
}
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