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Add the HostSystemUTCEpochNanoseconds abstract operation #9038

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Jun 19, 2024
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Add the HostSystemUTCEpochNanoseconds abstract operation #9038

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b54873d
Reformat definitions from HRT
Ms2ger Jun 10, 2024
82725b7
Add the HostSystemUTCEpochNanoseconds abstract operation
Ms2ger Mar 16, 2023
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Expand Up @@ -2937,6 +2937,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li><dfn data-x-href="https://tc39.es/ecma262/#sec-automatic-semicolon-insertion">automatic semicolon insertion</dfn></li>
<li><dfn data-x-href="https://tc39.es/ecma262/#sec-candidate-executions">candidate execution</dfn></li>
<li>The <dfn data-x-href="https://tc39.es/ecma262/#current-realm">current realm</dfn></li>
<li><dfn data-x-href="https://tc39.es/ecma262/#clamping">clamping</dfn> a mathematical value</li>
<li><dfn data-x-href="https://tc39.es/ecma262/#early-error-rule">early error</dfn></li>
<li><dfn data-x-href="https://tc39.es/ecma262/#sec-forward-progress">forward progress</dfn></li>
<li><dfn data-x-href="https://tc39.es/ecma262/#sec-invariants-of-the-essential-internal-methods">invariants of the essential internal methods</dfn></li>
Expand Down Expand Up @@ -3102,6 +3103,15 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<ul class="brief">
<li>The <dfn data-x-href="https://tc39.es/proposal-resizablearraybuffer/#sec-isarraybufferviewoutofbounds">IsArrayBufferViewOutOfBounds</dfn> abstract operation</li>
</ul>

<p>User agents that support JavaScript must also implement the <cite>Temporal</cite> proposal.
The following terms are defined there, and used in this specification: <ref>JSTEMPORAL</ref></p>

<ul class="brief">
<li>The <dfn data-x="js-HostSystemUTCEpochNanoseconds" data-x-href="https://tc39.es/proposal-temporal/#sec-hostsystemutcepochnanoseconds">HostSystemUTCEpochNanoseconds</dfn> abstract operation</li>
<li>The <dfn data-x-href="https://tc39.es/proposal-temporal/#eqn-nsMaxInstant">nsMaxInstant</dfn> and
<dfn data-x-href="https://tc39.es/proposal-temporal/#eqn-nsMinInstant">nsMinInstant</dfn> values</li>
</ul>
</dd>

<dt>WebAssembly</dt>
Expand Down Expand Up @@ -3397,20 +3407,20 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li><dfn data-x-href="https://fullscreen.spec.whatwg.org/#fullscreen-flag">fullscreen flag</dfn></li>
</ul>

<p><cite>High Resolution Time</cite> provides the <dfn
data-x-href="https://w3c.github.io/hr-time/#dfn-current-high-resolution-time">current high
resolution time</dfn>, the <dfn
data-x-href="https://w3c.github.io/hr-time/#dfn-relative-high-resolution-time">relative high
resolution time</dfn>, the <dfn
data-x-href="https://w3c.github.io/hr-time/#dfn-unsafe-shared-current-time">unsafe shared
current time</dfn>, the <dfn
data-x-href="https://w3c.github.io/hr-time/#dfn-shared-monotonic-clock">shared monotonic clock</dfn>,
the <dfn data-x-href="https://w3c.github.io/hr-time/#dfn-unsafe-moment">unsafe moment</dfn>,
the <dfn data-x-href="https://w3c.github.io/hr-time/#dfn-duration-from">duration from</dfn>,
the <dfn data-x-href="https://w3c.github.io/hr-time/#dfn-coarsen-time">coarsen time</dfn>
algorithm, and the <dfn
data-x-href="https://w3c.github.io/hr-time/#dom-domhighrestimestamp"><code>DOMHighResTimeStamp</code></dfn>
typedef. <ref>HRT</ref></p>
<p><cite>High Resolution Time</cite> provides the following features: <ref>HRT</ref></p>

<ul class="brief">
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-current-high-resolution-time">current high resolution time</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-relative-high-resolution-time">relative high resolution time</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-unsafe-shared-current-time">unsafe shared current time</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-shared-monotonic-clock">shared monotonic clock</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-unsafe-moment">unsafe moment</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-duration-from">duration from</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-coarsen-time">coarsen time</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-current-wall-time">current wall time</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dfn-unix-epoch">Unix epoch</dfn></li>
<li><dfn data-x-href="https://w3c.github.io/hr-time/#dom-domhighrestimestamp"><code>DOMHighResTimeStamp</code></dfn></li>
</ul>
</dd>


Expand Down Expand Up @@ -108948,6 +108958,26 @@ dictionary <dfn dictionary>PromiseRejectionEventInit</dfn> : <span>EventInit</sp
</li>
</ol>

<h5 id="hostsystemutcepochnanoseconds"><dfn>HostSystemUTCEpochNanoseconds</dfn>(<var>global</var>)</h5>

<p>The Temporal proposal contains an <span>implementation-defined</span> <span
data-x="js-HostSystemUTCEpochNanoseconds">HostSystemUTCEpochNanoseconds</span> abstract operation.
User agents must use the following implementation: <ref>JSTEMPORAL</ref></p>

<ol>
<li><p>Let <var>settingsObject</var> be <var>global</var>'s <span>relevant settings
object</span>.</p></li>

<li><p>Let <var>time</var> be <var>settingsObject</var>'s <span>current wall
time</span>.</p></li>

<li><p>Let <var>ns</var> be the number of nanoseconds from the <span>Unix epoch</span> to
<var>time</var>, rounded to the nearest integer.</p></li>

<li><p>Return the result of <span>clamping</span> <var>ns</var> between
<span>nsMinInstant</span> and <span>nsMaxInstant</span>.</p></li>
</ol>

<h5 id="integration-with-javascript-jobs">Job-related host hooks</h5>

<p>The JavaScript specification defines Jobs to be scheduled and run later by the host, as well as
Expand Down Expand Up @@ -143072,6 +143102,9 @@ INSERT INTERFACES HERE
<dt id="refsJSON">[JSON]</dt>
<dd><cite><a href="https://www.rfc-editor.org/rfc/rfc8259">The JavaScript Object Notation (JSON) Data Interchange Format</a></cite>, T. Bray. IETF.</dd>

<dt id="refsJSTEMPORAL">[JSTEMPORAL]</dt>
<dd><cite><a href="https://tc39.es/proposal-temporal/">Temporal</a></cite>. Ecma International.</dd>

<dt id="refsLONGTASKS">[LONGTASKS]</dt>
<dd><cite><a href="https://w3c.github.io/longtasks/">Long Tasks</a></cite>, D. Denicola, I. Grigorik, S. Panicker. W3C.</dd>

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