From ce7b1576e04c8130e9e4b6182f564d3fcd8f751f Mon Sep 17 00:00:00 2001
From: nastys <nastys@users.noreply.github.com>
Date: Sat, 5 Mar 2022 17:32:35 +0100
Subject: [PATCH] Low Power Mode detection

Change low to reduced

Low Power Mode detection

Fix namespace space

Low Power Mode detection

Fix namespace space

Low Power Mode detection
---
 darwin/util/sysinfo_darwin.mm |  8 ++++++++
 rpcs3/main.cpp                | 11 +++++++++++
 rpcs3/util/sysinfo.cpp        | 14 ++++++++++++++
 rpcs3/util/sysinfo.hpp        |  2 ++
 4 files changed, 35 insertions(+)

diff --git a/darwin/util/sysinfo_darwin.mm b/darwin/util/sysinfo_darwin.mm
index 67599f9d2c..e398b69d03 100644
--- a/darwin/util/sysinfo_darwin.mm
+++ b/darwin/util/sysinfo_darwin.mm
@@ -19,3 +19,11 @@ namespace Darwin_Version
         return osver.patchVersion;
     }
 }
+
+namespace Darwin_ProcessInfo
+{
+	bool getLowPowerModeEnabled()
+	{
+		return NSProcessInfo.processInfo.isLowPowerModeEnabled;
+	}
+}
diff --git a/rpcs3/main.cpp b/rpcs3/main.cpp
index dfb6587131..911332482d 100644
--- a/rpcs3/main.cpp
+++ b/rpcs3/main.cpp
@@ -513,14 +513,18 @@ int main(int argc, char** argv)
 	rlim.rlim_max = 4096;
 #ifdef RLIMIT_NOFILE
 	if (::setrlimit(RLIMIT_NOFILE, &rlim) != 0)
+	{
 		std::cerr << "Failed to set max open file limit (4096).\n";
+	}
 #endif
 
 	rlim.rlim_cur = 0x80000000;
 	rlim.rlim_max = 0x80000000;
 #ifdef RLIMIT_MEMLOCK
 	if (::setrlimit(RLIMIT_MEMLOCK, &rlim) != 0)
+	{
 		std::cerr << "Failed to set RLIMIT_MEMLOCK size to 2 GiB. Try to update your system configuration.\n";
+	}
 #endif
 	// Work around crash on startup on KDE: https://bugs.kde.org/show_bug.cgi?id=401637
 	setenv( "KDE_DEBUG", "1", 0 );
@@ -531,7 +535,9 @@ int main(int argc, char** argv)
 	::getrlimit(RLIMIT_NOFILE, &rlim);
 	rlim.rlim_cur = OPEN_MAX;
 	if (::setrlimit(RLIMIT_NOFILE, &rlim) != 0)
+	{
 		std::cerr << "Failed to set max open file limit (" << OPEN_MAX << ").\n";
+	}
 #endif
 
 #ifndef _WIN32
@@ -539,6 +545,11 @@ int main(int argc, char** argv)
 	sys_log.notice("Maximum open file descriptors: %i", utils::get_maxfiles());
 #endif
 
+	if (utils::get_low_power_mode())
+	{
+		sys_log.error("Low Power Mode is enabled, performance may be reduced.");
+	}
+
 	std::lock_guard qt_init(s_qt_init);
 
 	// The constructor of QApplication eats the --style and --stylesheet arguments.
diff --git a/rpcs3/util/sysinfo.cpp b/rpcs3/util/sysinfo.cpp
index 8a440962f8..29f62a1525 100755
--- a/rpcs3/util/sysinfo.cpp
+++ b/rpcs3/util/sysinfo.cpp
@@ -57,6 +57,11 @@ namespace Darwin_Version
 	extern int getNSminorVersion();
 	extern int getNSpatchVersion();
 }
+
+namespace Darwin_ProcessInfo
+{
+	extern bool getLowPowerModeEnabled();
+}
 #endif
 
 bool utils::has_ssse3()
@@ -474,6 +479,15 @@ int utils::get_maxfiles()
 #endif
 }
 
+bool utils::get_low_power_mode()
+{
+#ifdef __APPLE__
+	return Darwin_ProcessInfo::getLowPowerModeEnabled();
+#else
+	return false;
+#endif
+}
+
 static constexpr ullong round_tsc(ullong val)
 {
 	return utils::rounded_div(val, 1'000'000) * 1'000'000;
diff --git a/rpcs3/util/sysinfo.hpp b/rpcs3/util/sysinfo.hpp
index 3aabc97311..ef8c09c78c 100755
--- a/rpcs3/util/sysinfo.hpp
+++ b/rpcs3/util/sysinfo.hpp
@@ -51,6 +51,8 @@ namespace utils
 
 	int get_maxfiles();
 
+	bool get_low_power_mode();
+
 	ullong get_tsc_freq();
 
 	u64 get_total_memory();