fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.6 KiB
72 lines
2.6 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#include "rocksdb/env.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// NOTE: SpecialEnv offers most of this functionality, along with hooks
|
|
// for safe DB behavior under a mock time environment, so should be used
|
|
// instead of MockTimeEnv for DB tests.
|
|
class MockTimeEnv : public EnvWrapper {
|
|
public:
|
|
explicit MockTimeEnv(Env* base) : EnvWrapper(base) {}
|
|
|
|
virtual Status GetCurrentTime(int64_t* time) override {
|
|
assert(time != nullptr);
|
|
assert(current_time_ <=
|
|
static_cast<uint64_t>(std::numeric_limits<int64_t>::max()));
|
|
*time = static_cast<int64_t>(current_time_);
|
|
return Status::OK();
|
|
}
|
|
|
|
virtual uint64_t NowMicros() override {
|
|
assert(current_time_ <= std::numeric_limits<uint64_t>::max() / 1000000);
|
|
return current_time_ * 1000000;
|
|
}
|
|
|
|
virtual uint64_t NowNanos() override {
|
|
assert(current_time_ <= std::numeric_limits<uint64_t>::max() / 1000000000);
|
|
return current_time_ * 1000000000;
|
|
}
|
|
|
|
uint64_t RealNowMicros() { return target()->NowMicros(); }
|
|
|
|
void set_current_time(uint64_t time) {
|
|
assert(time >= current_time_);
|
|
current_time_ = time;
|
|
}
|
|
|
|
// TODO: this is a workaround for the different behavior on different platform
|
|
// for timedwait timeout. Ideally timedwait API should be moved to env.
|
|
// details: PR #7101.
|
|
void InstallTimedWaitFixCallback() {
|
|
SyncPoint::GetInstance()->DisableProcessing();
|
|
SyncPoint::GetInstance()->ClearAllCallBacks();
|
|
#if defined(OS_MACOSX) && !defined(NDEBUG)
|
|
// This is an alternate way (vs. SpecialEnv) of dealing with the fact
|
|
// that on some platforms, pthread_cond_timedwait does not appear to
|
|
// release the lock for other threads to operate if the deadline time
|
|
// is already passed. (TimedWait calls are currently a bad abstraction
|
|
// because the deadline parameter is usually computed from Env time,
|
|
// but is interpreted in real clock time.)
|
|
SyncPoint::GetInstance()->SetCallBack(
|
|
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
|
|
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
|
|
if (time_us < this->RealNowMicros()) {
|
|
*reinterpret_cast<uint64_t*>(arg) = this->RealNowMicros() + 1000;
|
|
}
|
|
});
|
|
#endif // OS_MACOSX && !NDEBUG
|
|
SyncPoint::GetInstance()->EnableProcessing();
|
|
}
|
|
|
|
private:
|
|
std::atomic<uint64_t> current_time_{0};
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|