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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 _THRIFT_CONCURRENCY_UTIL_H_
#define _THRIFT_CONCURRENCY_UTIL_H_ 1
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <time.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <thrift/transport/PlatformSocket.h>
namespace apache {
namespace thrift {
namespace concurrency {
/**
* Utility methods
*
* This class contains basic utility methods for converting time formats,
* and other common platform-dependent concurrency operations.
* It should not be included in API headers for other concurrency library
* headers, since it will, by definition, pull in all sorts of horrid
* platform dependent stuff. Rather it should be inluded directly in
* concurrency library implementation source.
*
* @version $Id:$
*/
class Util {
static const int64_t NS_PER_S = 1000000000LL;
static const int64_t US_PER_S = 1000000LL;
static const int64_t MS_PER_S = 1000LL;
static const int64_t NS_PER_MS = NS_PER_S / MS_PER_S;
static const int64_t NS_PER_US = NS_PER_S / US_PER_S;
static const int64_t US_PER_MS = US_PER_S / MS_PER_S;
public:
/**
* Converts millisecond timestamp into a THRIFT_TIMESPEC struct
*
* @param struct THRIFT_TIMESPEC& result
* @param time or duration in milliseconds
*/
static void toTimespec(struct THRIFT_TIMESPEC& result, int64_t value) {
result.tv_sec = value / MS_PER_S; // ms to s
result.tv_nsec = (value % MS_PER_S) * NS_PER_MS; // ms to ns
}
static void toTimeval(struct timeval& result, int64_t value) {
result.tv_sec = static_cast<uint32_t>(value / MS_PER_S); // ms to s
result.tv_usec = static_cast<uint32_t>((value % MS_PER_S) * US_PER_MS); // ms to us
}
static void toTicks(int64_t& result,
int64_t secs,
int64_t oldTicks,
int64_t oldTicksPerSec,
int64_t newTicksPerSec) {
result = secs * newTicksPerSec;
result += oldTicks * newTicksPerSec / oldTicksPerSec;
int64_t oldPerNew = oldTicksPerSec / newTicksPerSec;
if (oldPerNew && ((oldTicks % oldPerNew) >= (oldPerNew / 2))) {
++result;
}
}
/**
* Converts struct THRIFT_TIMESPEC to arbitrary-sized ticks since epoch
*/
static void toTicks(int64_t& result, const struct THRIFT_TIMESPEC& value, int64_t ticksPerSec) {
return toTicks(result, value.tv_sec, value.tv_nsec, NS_PER_S, ticksPerSec);
}
/**
* Converts struct timeval to arbitrary-sized ticks since epoch
*/
static void toTicks(int64_t& result, const struct timeval& value, int64_t ticksPerSec) {
return toTicks(result, (unsigned long)value.tv_sec, (unsigned long)value.tv_usec, US_PER_S, ticksPerSec);
}
/**
* Converts struct THRIFT_TIMESPEC to milliseconds
*/
static void toMilliseconds(int64_t& result, const struct THRIFT_TIMESPEC& value) {
return toTicks(result, value, MS_PER_S);
}
/**
* Converts struct timeval to milliseconds
*/
static void toMilliseconds(int64_t& result, const struct timeval& value) {
return toTicks(result, value, MS_PER_S);
}
/**
* Converts struct THRIFT_TIMESPEC to microseconds
*/
static void toUsec(int64_t& result, const struct THRIFT_TIMESPEC& value) {
return toTicks(result, value, US_PER_S);
}
/**
* Converts struct timeval to microseconds
*/
static void toUsec(int64_t& result, const struct timeval& value) {
return toTicks(result, value, US_PER_S);
}
/**
* Get current time as a number of arbitrary-size ticks from epoch
*/
static int64_t currentTimeTicks(int64_t ticksPerSec);
/**
* Get current time as milliseconds from epoch
*/
static int64_t currentTime() { return currentTimeTicks(MS_PER_S); }
/**
* Get current time as micros from epoch
*/
static int64_t currentTimeUsec() { return currentTimeTicks(US_PER_S); }
};
}
}
} // apache::thrift::concurrency
#endif // #ifndef _THRIFT_CONCURRENCY_UTIL_H_
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