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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef GVISOR_TEST_UTIL_TIMER_UTIL_H_
#define GVISOR_TEST_UTIL_TIMER_UTIL_H_
#include <errno.h>
#include <sys/time.h>
#include <functional>
#include "gmock/gmock.h"
#include "absl/time/time.h"
#include "test/util/cleanup.h"
#include "test/util/logging.h"
#include "test/util/posix_error.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
// MonotonicTimer is a simple timer that uses a monotic clock.
class MonotonicTimer {
public:
MonotonicTimer() {}
absl::Duration Duration() {
struct timespec ts;
TEST_CHECK(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
return absl::TimeFromTimespec(ts) - start_;
}
void Start() {
struct timespec ts;
TEST_CHECK(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
start_ = absl::TimeFromTimespec(ts);
}
protected:
absl::Time start_;
};
// Sets the given itimer and returns a cleanup function that restores the
// previous itimer when it goes out of scope.
inline PosixErrorOr<Cleanup> ScopedItimer(int which,
struct itimerval const& new_value) {
struct itimerval old_value;
int rc = setitimer(which, &new_value, &old_value);
MaybeSave();
if (rc < 0) {
return PosixError(errno, "setitimer failed");
}
return Cleanup(std::function<void(void)>([which, old_value] {
EXPECT_THAT(setitimer(which, &old_value, nullptr), SyscallSucceeds());
}));
}
// Returns the current time.
absl::Time Now(clockid_t id);
} // namespace testing
} // namespace gvisor
#endif // GVISOR_TEST_UTIL_TIMER_UTIL_H_
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