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osx: disable app-nap during serial comm (#687)

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Apple introduced app-nap with OS X 10.10. This feature
saves power by throttling apps running in background.
However, it also less accurate timers in systemcalls. In
our case a 30ms select timeout would take up to 10s.

This patch uses an API also added with 10.10 to disable
app-nap as long as the serial port is polled.
This commit is contained in:
AntiCat 2018-10-08 07:15:29 +02:00 • committed by pwpiwi
commit 2a53731106
5 changed files with 80 additions and 5 deletions
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17
client/util_darwin.h Normal file
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//-----------------------------------------------------------------------------
// (c) 2018 AntiCat
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// macOS framework bindings
//-----------------------------------------------------------------------------
#ifndef UTIL_DARWIN_H__
#define UTIL_DARWIN_H__
void disableAppNap(const char* reason);
void enableAppNap();
#endif