genode/repos/base/include/base/duration.h
Martin Stein 181c78d482 timeout: use uint64_t for all plain time values
This enforces the use of unsigned 64-bit values for time in the duration type,
the timeout framework, the timer session, the userland timer-drivers, and the
alarm framework on all platforms. The commit also adapts the code that uses
these tools accross all basic repositories (base, base-*, os. gems, libports,
ports, dde_*) to use unsigned 64-bit values for time as well as far as this
does not imply profound modifications.

Fixes #3208
2019-05-06 16:15:26 +02:00

115 lines
2.3 KiB
C++

/*
* \brief A duration type for both highly precise and long durations
* \author Martin Stein
* \date 2017-03-21
*/
/*
* Copyright (C) 2016-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _INCLUDE__BASE__DURATION_H_
#define _INCLUDE__BASE__DURATION_H_
/* Genode includes */
#include <base/stdint.h>
#include <base/exception.h>
#include <base/output.h>
namespace Genode {
class Microseconds;
class Milliseconds;
class Duration;
}
/**
* Makes it clear that a given integer value stands for microseconds
*/
struct Genode::Microseconds
{
uint64_t value;
explicit Microseconds(uint64_t value) : value(value) { }
void print(Output &out) const
{
Genode::print(out, value);
out.out_string(" us");
}
};
/**
* Makes it clear that a given integer value stands for milliseconds
*/
struct Genode::Milliseconds
{
uint64_t value;
explicit Milliseconds(uint64_t value) : value(value) { }
void print(Output &out) const
{
Genode::print(out, value);
out.out_string(" ms");
}
};
/**
* A duration type that combines high precision and large intervals
*/
struct Genode::Duration
{
public:
struct Overflow : Exception { };
private:
enum { US_PER_MS = 1000UL };
enum { MS_PER_HOUR = 1000UL * 60 * 60 };
enum { US_PER_HOUR = 1000UL * 1000 * 60 * 60 };
uint64_t _microseconds { 0 };
public:
void add(Microseconds us);
void add(Milliseconds ms);
bool less_than(Duration const &other) const;
explicit Duration(Milliseconds ms) { add(ms); }
explicit Duration(Microseconds us) { add(us); }
Microseconds trunc_to_plain_us() const;
Milliseconds trunc_to_plain_ms() const;
};
namespace Genode
{
static inline
Microseconds min(Microseconds const x, Microseconds const y) {
return (x.value < y.value) ? x : y; }
static inline
Microseconds max(Microseconds const x, Microseconds const y) {
return (x.value > y.value) ? x : y; }
static inline
Milliseconds min(Milliseconds const x, Milliseconds const y) {
return (x.value < y.value) ? x : y; }
static inline
Milliseconds max(Milliseconds const x, Milliseconds const y) {
return (x.value > y.value) ? x : y; }
};
#endif /* _INCLUDE__BASE__DURATION_H_ */