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util: make `mmapread()` work on Windows again...
util: make `mmapread()` work on Windows again 522b4d729e89 started referencing `mmap.MAP_PRIVATE`, but that's not available on Windows, so `hg version` worked, but `make local` did not. That commit also started calling the constructor with the fine-grained `flags` and `prot` args, but those aren't available on Windows either[1] (though the backing C code doesn't seem conditionalized to disallow usage of them). I assume the change away from from the `access` arg was to provide the same options, plus `MAP_POPULATE`. Looking at the source code[2], they're not quite the same- `ACCESS_READ` is equivalent to `flags = MAP_SHARED` and `prot = PROT_READ`. `MAP_PRIVATE` is only used with `ACCESS_COPY`, which allows read and write. Therefore, we can't quite get the same baseline flags on Windows, but this was the status quo ante and `MAP_POPULATE` is a Linux thing, so presumably it works. I realize that typically the OS differences are abstracted into the platform modules, but I'm leaving it here so that it is obvious what the differences are between the platforms. [1] https://docs.python.org/3/library/mmap.html#mmap.mmap [2] https://github.com/python/cpython/blob/5e0abb47886bc665eefdcc19fde985f803e49d4c/Modules/mmapmodule.c#L1539
Gregory Szorc - - Load All Authors

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filediff.tmpl
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{header}
<title>{repo|escape}: diff {file|escape}</title>
<link rel="alternate" type="application/atom+xml"
href="{url|urlescape}atom-log" title="Atom feed for {repo|escape}"/>
<link rel="alternate" type="application/rss+xml"
href="{url|urlescape}rss-log" title="RSS feed for {repo|escape}"/>
</head>
<body>
<div class="page_header">
<a href="{logourl}" title="Mercurial" style="float: right;">Mercurial</a>
<a href="/">Mercurial</a> {pathdef%breadcrumb} / diff
</div>
<div class="page_nav">
<div>
<a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a> |
<a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a> |
<a href="{url|urlescape}log{sessionvars%urlparameter}">changelog</a> |
<a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a> |
<a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a> |
<a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a> |
<a href="{url|urlescape}branches{sessionvars%urlparameter}">branches</a> |
<a href="{url|urlescape}file/{symrev}{path|urlescape}{sessionvars%urlparameter}">files</a> |
<a href="{url|urlescape}rev/{symrev}{sessionvars%urlparameter}">changeset</a> |
<a href="{url|urlescape}file/{symrev}/{file|urlescape}{sessionvars%urlparameter}">file</a> |
<a href="{url|urlescape}file/tip/{file|urlescape}{sessionvars%urlparameter}">latest</a> |
<a href="{url|urlescape}log/{symrev}/{file|urlescape}{sessionvars%urlparameter}">revisions</a> |
<a href="{url|urlescape}annotate/{symrev}/{file|urlescape}{sessionvars%urlparameter}">annotate</a> |
diff |
<a href="{url|urlescape}comparison/{symrev}/{file|urlescape}{sessionvars%urlparameter}">comparison</a> |
<a href="{url|urlescape}raw-diff/{symrev}/{file|urlescape}">raw</a> |
<a href="{url|urlescape}help{sessionvars%urlparameter}">help</a>
</div>
{searchform}
</div>
<div class="title">{file|escape}</div>
<table>
{branch%filerevbranch}
<tr>
<td>changeset {rev}</td>
<td style="font-family:monospace"><a class="list" href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a></td>
</tr>
{parent%filediffparent}
{child%filediffchild}
</table>
<div class="list_head"></div>
<div class="page_body">
{diff}
</div>
{footer}