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118 lines
2.1 KiB
C++
118 lines
2.1 KiB
C++
// Copyright 2019-2020, Collabora, Ltd.
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// SPDX-License-Identifier: BSL-1.0
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/*!
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* @file
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* @brief Implementation of a steady, convertible clock.
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* @author Ryan Pavlik <ryan.pavlik@collabora.com>
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* @ingroup aux_util
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*/
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#include "xrt/xrt_config_os.h"
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#include "xrt/xrt_compiler.h"
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#include "os/os_time.h"
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#include "u_time.h"
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#include <new>
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#include <assert.h>
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#include <stdlib.h>
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#include <time.h>
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/*
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*
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* Structs.
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*
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*/
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struct time_state
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{
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timepoint_ns offset;
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};
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/*
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*
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* 'Exported' functions.
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*
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*/
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extern "C" struct time_state *
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time_state_create()
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{
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time_state *state = new (std::nothrow) time_state;
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state->offset = os_monotonic_get_ns();
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return state;
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}
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extern "C" void
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time_state_destroy(struct time_state **state_ptr)
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{
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struct time_state *state = *state_ptr;
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if (state == NULL) {
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return;
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}
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delete state;
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*state_ptr = NULL;
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}
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extern "C" timepoint_ns
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time_state_get_now(struct time_state const *state)
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{
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assert(state != NULL);
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return time_state_monotonic_to_ts_ns(state, os_monotonic_get_ns());
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}
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extern "C" timepoint_ns
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time_state_get_now_and_update(struct time_state *state)
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{
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assert(state != NULL);
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return time_state_get_now(state);
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}
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extern "C" void
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time_state_to_timespec(struct time_state const *state, timepoint_ns timestamp, struct timespec *out)
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{
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assert(state != NULL);
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assert(out != NULL);
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uint64_t ns = time_state_ts_to_monotonic_ns(state, timestamp);
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out->tv_sec = ns / (U_1_000_000_000);
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out->tv_nsec = ns % (U_1_000_000_000);
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}
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extern "C" timepoint_ns
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time_state_from_timespec(struct time_state const *state, const struct timespec *timespecTime)
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{
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assert(state != NULL);
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assert(timespecTime != NULL);
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uint64_t ns = 0;
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ns += timespecTime->tv_nsec;
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ns += timespecTime->tv_sec * U_1_000_000_000;
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return time_state_monotonic_to_ts_ns(state, ns);
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}
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extern "C" timepoint_ns
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time_state_monotonic_to_ts_ns(struct time_state const *state, uint64_t monotonic_ns)
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{
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assert(state != NULL);
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return monotonic_ns - state->offset;
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}
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extern "C" uint64_t
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time_state_ts_to_monotonic_ns(struct time_state const *state, timepoint_ns timestamp)
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{
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assert(state != NULL);
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return timestamp + state->offset;
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}
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