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/* Copyright 2012-present Facebook, Inc.
* Licensed under the Apache License, Version 2.0 */
#include "watchman.h"
#include "InMemoryView.h"
namespace watchman {
// we want to consume inotify events as quickly as possible
// to minimize the risk that the kernel event buffer overflows,
// so we do this as a blocking thread that reads the inotify
// descriptor and then queues the filesystem IO work until after
// we have drained the inotify descriptor
void InMemoryView::notifyThread(const std::shared_ptr<w_root_t>& root) {
PendingCollection pending;
auto localLock = pending.wlock();
if (!watcher_->start(root)) {
w_log(
W_LOG_ERR,
"failed to start root %s, cancelling watch: %s\n",
root->root_path.c_str(),
root->failure_reason.c_str());
root->cancel();
return;
}
// signal that we're done here, so that we can start the
// io thread after this point
pending_.wlock()->ping();
while (!stopThreads_) {
// big number because not all watchers can deal with
// -1 meaning infinite wait at the moment
if (watcher_->waitNotify(86400)) {
while (watcher_->consumeNotify(root, localLock)) {
if (localLock->size() >= WATCHMAN_BATCH_LIMIT) {
break;
}
if (!watcher_->waitNotify(0)) {
break;
}
}
if (localLock->size() > 0) {
auto lock = pending_.wlock();
lock->append(&*localLock);
lock->ping();
}
}
}
}
}
/* vim:ts=2:sw=2:et:
*/
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