Auto-select web server port (for Ubuntu); --port option for PiPedalConfig

.vscode/c_cpp_properties.json

@@ -11,7 +11,7 @@
                 "/usr/lib",
                 "~/src/vst3sdk"
             ],
-            "compilerPath": "/usr/bin/gcc",
+            "compilerPath": "/usr/bin/gcc-12",
             "cStandard": "c17",
             "cppStandard": "c++20",
             "intelliSenseMode": "linux-gcc-arm64",

.vscode/launch.json

@@ -266,6 +266,48 @@
                 }
             ]
         },
+        {
+            "name": "(gdb) pipedalconfigX",
+            "type": "cppdbg",
+            "request": "launch",
+            // Resolved by CMake Tools:
+            "program": "/home/robin/src/pipedal/build/src/pipedalconfig",
+            "args": [ 
+                "--nosudo", // run without sudo (which will fail because of perms, but allow us to debug deeper into install code.)
+                //"--get-current-port"
+                // "--uninstall"
+                //"--enable-p2p" , "CA", "PiPedalTest","12345678","14"
+                // "--alsa-devices"
+                "--prefix", "/usr",
+                "--install", "--port", "0"
+            ],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [
+                {
+                    "name": "PATH",
+                    "value": "$PATH:${command:cmake.launchTargetDirectory}"
+                },
+                {
+                    "name": "ASAN_OPTIONS",
+                    "value": "detect_leaks=0"
+
+                },
+               {
+                    "name": "OTHER_VALUE",
+                    "value": "Something something"
+                }
+            ],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ]
+        },
 
 
         {
@@ -312,46 +354,6 @@
                 }
             ]
         },
-        {
-            "name": "(gdb) pipedalconfig",
-            "type": "cppdbg",
-            "request": "launch",
-            // Resolved by CMake Tools:
-            "program": "${command:cmake.launchTargetPath}",
-            "args": [ 
-                "--nosudo", // run without sudo (which will fail because of perms, but allow us to debug deeper into install code.)
-                //"--get-current-port"
-                // "--uninstall"
-                //"--enable-p2p" , "CA", "PiPedalTest","12345678","14"
-                "--alsa-devices"
-            ],
-            "stopAtEntry": false,
-            "cwd": "${workspaceFolder}",
-            "environment": [
-                {
-                    "name": "PATH",
-                    "value": "$PATH:${command:cmake.launchTargetDirectory}"
-                },
-                {
-                    "name": "ASAN_OPTIONS",
-                    "value": "detect_leaks=0"
-
-                },
-               {
-                    "name": "OTHER_VALUE",
-                    "value": "Something something"
-                }
-            ],
-            "externalConsole": false,
-            "MIMode": "gdb",
-            "setupCommands": [
-                {
-                    "description": "Enable pretty-printing for gdb",
-                    "text": "-enable-pretty-printing",
-                    "ignoreFailures": true
-                }
-            ]
-        },
         {
             "name": "(gdb) pipedal_alsa_check",
             "type": "cppdbg",

.vscode/settings.json

@@ -110,5 +110,6 @@
         "pipedalshutdownd",
         "pipedaltest",
         "ToobAmp"
-    ]
+    ],
+    "C_Cpp.default.compilerPath": "/usr/bin/g++-13"
 }

CMakeLists.txt

@@ -98,7 +98,7 @@ endif()
 
 set(CPACK_GENERATOR "DEB")
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Robin E. R. Davies<rerdavies@gmail.com>") # required
-set(CPACK_PACKAGE_VENDOR "Robin Davies")
+set(CPACK_PACKAGE_VENDOR "Robin E. R. Davies")
 set(CPACK_PACKAGE_DESCRIPTION "IoT guitar effect pedal for Raspberry Pi, with phone-friendly web interface.")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "IoT guitar effect pedal for Raspberry Pi")
 set(CPACK_DEBIAN_PACKAGE_SECTION sound)

LICENSE.txt

@@ -1,4 +1,4 @@
-Copyright 2021-2024 Robin Davies
+Copyright 2021-2024 Robin E. R. Davies
 
 Permission is hereby granted, free of charge, to any person obtaining 
 a copy of this software and associated documentation files (the "Software"), 

NetworkManagerP2P/src/main.cpp

@@ -17,7 +17,7 @@ using namespace std;
 static void PrintHelp()
 {
     cout << "nm-pipedal-p2p - P2P Manager for NetworkManager network stack." << endl
-         << "Copyright (c) 2024 Robin Davies." << endl
+         << "Copyright (c) 2024 Robin E. R. Davies." << endl
          << endl
          << "Provides P2P connections on LINUX distributions that use NetworkManager." << endl
          << endl

NetworkManagerP2P/src/ss.hpp

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Robin Davies
+// Copyright (c) 2022 Robin E. R. Davies
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy of
 // this software and associated documentation files (the "Software"), to deal in

PiPedalCommon/src/HtmlHelper.cpp

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Robin Davies
+// Copyright (c) 2022 Robin E. R. Davies
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy of
 // this software and associated documentation files (the "Software"), to deal in

PiPedalCommon/src/Lv2Log.cpp

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Robin Davies
+// Copyright (c) 2022 Robin E. R. Davies
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy of
 // this software and associated documentation files (the "Software"), to deal in

PiPedalCommon/src/NetLinkChannelInfo.cpp

@@ -3,7 +3,7 @@ Copyright (c) 2007, 2008	Johannes Berg
 Copyright (c) 2007		Andy Lutomirski
 Copyright (c) 2007		Mike Kershaw
 Copyright (c) 2008		Luis R. Rodriguez
-Copyright (c) 2024      Robin Davies
+Copyright (c) 2024      Robin E. R. Davies
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

PiPedalCommon/src/NetLinkChannelInfo.cpp.bak

@@ -3,7 +3,7 @@ Copyright (c) 2007, 2008	Johannes Berg
 Copyright (c) 2007		Andy Lutomirski
 Copyright (c) 2007		Mike Kershaw
 Copyright (c) 2008		Luis R. Rodriguez
-Copyright (c) 2024      Robin Davies
+Copyright (c) 2024      Robin E. R. Davies
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

PiPedalCommon/src/json.cpp

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Robin Davies
+// Copyright (c) 2022 Robin E. R. Davies
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy of
 // this software and associated documentation files (the "Software"), to deal in

debian/copyright

@@ -1,24 +1,24 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: pipedal
-Upstream-Contact: Robin Davies <rerdavies@gmail.com>
+Upstream-Contact: Robin E. R. Davies <rerdavies@gmail.com>
 Source: https://www.example.com/software/project
 
 Files: *
-Copyright: 2021, Robin Davies
+Copyright: 2021, Robin E. R. Davies
 License: Expat
 
 Files: src/*
-Copyright: 2021, Robin Davies
+Copyright: 2021, Robin E. R. Davies
 License: Expat
 
 
 Files: react/src
-Copyright: 2020, Robin Davies.
+Copyright: 2020, Robin E. R. Davies.
 License: Expat
 
 Files: src/Lv2EventBufferWriter.hpp
 Copyright: 2008-2014, David Robillard <d@drobilla.net>
-    2021, Robin Davies
+    2021, Robin E. R. Davies
 License: ISC and Expat
 
 Files: react/node_modules/@babel/*

debian/fill.copyright.blanks.yml

@@ -1,11 +1,11 @@
 ---
 /:
   license: Expat
-  copyright: 2021, Robin Davies.
+  copyright: 2021, Robin E. R. Davies.
 
 src/react/:
   license: Expat
-  copyright: 2021, Robin Davies.
+  copyright: 2021, Robin E. R. Davies.
 
 react/node_modules/webpack/:
   license: Expat

docs/LicensePiPedal.md

@@ -1,4 +1,4 @@
-Copyright 2021-2024 Robin Davies
+Copyright 2021-2024 Robin E. R. Davies
 
 Permission is hereby granted, free of charge, to any person obtaining 
 a copy of this software and associated documentation files (the "Software"), 

docs/LicenseToobAmp.md

@@ -1,4 +1,4 @@
-Copyright 2021-2023 Robin Davies
+Copyright 2021-2023 Robin E. R. Davies
 
 Permission is hereby granted, free of charge, to any person obtaining 
 a copy of this software and associated documentation files (the "Software"), 

react/src/PiPedalModel.tsx

@@ -1014,7 +1014,7 @@ export class PiPedalModel //implements PiPedalModel
         try { 
             await this.webSocket.connect();
         } catch (error) {
-            this.setError("Failed to connect to server. (" + getErrorMessage(error));
+            this.setError("Failed to connect to server. " + getErrorMessage(error) );
             return false;
 
         }

react/src/PiPedalSocket.tsx

@@ -281,7 +281,7 @@ class PiPedalSocket {
                 ws.onerror = (evt: Event) => {
                     ws.onclose = null;
                     ws.onerror = null;
-                    reject("Failed to connect.");
+                    reject("Connection not accepted.");
                 };
                 ws.onopen = (event: Event) => {
                     ws.onerror = self.handleError.bind(self);
@@ -290,7 +290,7 @@ class PiPedalSocket {
                     resolve(ws);
                 };
             } catch (e: any){
-                reject("Failed to connect. " + e.toString());
+                reject("Failed to connect: " + e.toString());
             };
         });
 }

src/AvahiService.cpp

@@ -181,6 +181,7 @@ void AvahiService::EntryGroupCallback(AvahiEntryGroup *g, AvahiEntryGroupState s
         char *n = avahi_alternative_service_name(avahiNameString);
         avahi_free(avahiNameString);
         avahiNameString = n;
+        this->serviceName = n;
         Lv2Log::warning(SS("Service name collision, renaming service to '" << avahiNameString << "'\n"));
         /* And recreate the services */
         create_group(avahi_entry_group_get_client(g));

src/ConfigMain.cpp

@@ -27,6 +27,7 @@
 #include "alsaCheck.hpp"
 #include "RegDb.hpp"
 #include "Locale.hpp"
+#include "Finally.hpp"
 
 #include <filesystem>
 #include <stdlib.h>
@@ -953,6 +954,110 @@ void InstallPgpKey()
         sysExec(cmd.c_str());
     }
 }
+
+
+static uint32_t autoSelectPorts[] = { 
+    80,
+    81, // unofficial alternate 
+    8080, // unofficial alternate 
+    8081, // unofficial alternate 
+    8008, // unofficial alternate 
+    83  // Not official at all.
+    };
+
+
+
+static bool isPortInUse(int port) {
+    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (sockfd < 0) {
+        throw std::runtime_error(SS("Socket creation failed: " << strerror(errno)));
+    }
+    Finally ff{[sockfd]() {
+        close(sockfd);
+    }};
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = INADDR_ANY;
+    addr.sin_port = htons(port);
+
+    // Try to bind to the port
+    int result = bind(sockfd, (struct sockaddr*)&addr, sizeof(addr));
+
+    if (result < 0) {
+        if (errno == EADDRINUSE) {
+            return true;  // Port is in use
+        } else {
+            cout << "Warning: Unexpected error  binding socket to port " << port << ": " << strerror(errno) << endl;
+            return true;
+        }
+    }
+
+    return false;  // Port is free
+}
+
+
+static std::string AutoSelectPort() {
+    constexpr size_t MAX_PORT = sizeof(autoSelectPorts)/sizeof(autoSelectPorts[0]);
+
+    int32_t port = -1;
+    for (size_t i = 0; i < MAX_PORT; ++i)
+    {
+        if (!isPortInUse(autoSelectPorts[i]))
+        {
+            port = autoSelectPorts[i];
+            break;
+        }
+    }
+    if (port == -1) {
+        cout << "Warning: Can't find an available HTTP port. Setting to port 80 anyway." << endl;
+        port = 80;
+    } else if (port != 80)
+    {
+        cout << "Warning: Port 80 is already in use. Using port " << port << " instead." << endl; 
+    }
+
+    return SS(port);
+
+}
+
+
+bool SetWebServerPort(std::string portOption)
+{
+
+    try {
+        auto nPos = portOption.find_last_of(':');
+        std::string strPort;
+        if (nPos != std::string::npos)
+        {
+            strPort = portOption.substr(nPos+1);
+        } else {
+            strPort = portOption;
+        }
+        std::istringstream ss(strPort);
+
+        uint16_t iPort = 0;
+        ss >> iPort;
+        if (!ss)
+        {
+            throw std::runtime_error(SS("Invalid port number: " << strPort));
+        }
+
+        StopService(false);
+
+        PrepareServiceConfigurationFile(iPort);
+
+        StartService(true);
+
+        cout << "PiPedal web server is listening on port " << iPort << endl;
+    } catch (const std::exception&e)
+    {
+        cout << "Error: " << e.what() << endl;
+        return false;
+    }
+    return true;
+}
+
 void Install(const fs::path &programPrefix, const std::string endpointAddress)
 {
     cout << "Configuring pipedal" << endl;
@@ -1000,14 +1105,14 @@ void Install(const fs::path &programPrefix, const std::string endpointAddress)
         {
             throw std::runtime_error("Invalid endpoint address: " + endpointAddress);
         }
-        uint16_t port;
+        uint16_t port = 80;
         auto strPort = endpointAddress.substr(endpos + 1);
         try
         {
             auto lport = std::stoul(strPort);
             if (lport == 0 || lport >= std::numeric_limits<uint16_t>::max())
             {
-                throw std::runtime_error("out of range.");
+                throw std::runtime_error("Port number is too large.");
             }
             port = (uint16_t)lport;
             std::stringstream s;
@@ -1020,6 +1125,7 @@ void Install(const fs::path &programPrefix, const std::string endpointAddress)
             s << "Invalid port number: " << strPort;
             throw std::runtime_error(s.str());
         }
+
         PrepareServiceConfigurationFile(port);
 
         bool authBindRequired = port < 512;
@@ -1188,9 +1294,18 @@ void Install(const fs::path &programPrefix, const std::string endpointAddress)
     {
         // don't allow abnormal termination, which leaves the package in a state that's
         // difficult to uninstall.
-        cout << "Error: " << e.what();
+        cout << "Error: " << e.what() << endl;
         cout << "      Run 'pipedalconfig  --install' again to complete setup of PiPedal." << endl;
     }
+    const std::string ADDR_ANY = "0.0.0.0:";
+
+    if (endpointAddress.starts_with(ADDR_ANY))
+    {
+        cout << "PiPedal web server is listening on port " << endpointAddress.substr(ADDR_ANY.length()) << endl;
+    } else {
+        cout << "PiPedal web server is listening on port " << endpointAddress << endl;
+    }
+
 }
 
 static std::string GetCurrentWebServicePort()
@@ -1199,7 +1314,7 @@ static std::string GetCurrentWebServicePort()
     config.Load("/etc/pipedal/config", "");
 
     std::ostringstream ss;
-    ss << config.GetSocketServerPort();
+    ss << config.GetSocketServerAddress() << ":" << config.GetSocketServerPort();
     return ss.str();
 }
 
@@ -1208,7 +1323,7 @@ static void PrintHelp()
     PrettyPrinter pp;
     pp << "pipedalconfig - Command-line post-install configuration for PiPedal"
        << "\n"
-       << "Copyright (c) 2022-2024 Robin Davies."
+       << "Copyright (c) 2022-2024 Robin E. R. Davies."
        << "\n"
        << "\n"
        << "See https://rerdavies.github.io/pipedal/Documentation.html for "
@@ -1239,6 +1354,10 @@ static void PrintHelp()
         << "The --port option controls which TCP/IP port the web server uses."
         << "\n\n"
 
+        << HangingIndent() << "    --port <port#>\t"
+        << "Set the TCP/IP port that the web server will use."
+        << "\n"
+
         << HangingIndent() << "    --uninstall\t"
         << "Remove installed services."
         << "\n"
@@ -1401,6 +1520,29 @@ void ListValidCountryCodes()
     }
 }
 
+static std::string ProcessPortOption(std::string portOption)
+{
+    if (portOption == "" || portOption == "0")  // allow testing of port autodetect.
+    {
+        std::string t = GetCurrentWebServicePort();
+        if (portOption != "0")  {// allows easy debugging of port AutoSelectPort.
+            portOption = t;
+        } else {
+            portOption = "";
+        }
+        if (portOption == "")
+        {
+            portOption = AutoSelectPort();
+        }
+    }
+    std::string ADDR_ANY = "0.0.0.0:";
+
+    if (portOption.find(':') == string::npos)
+    {
+        portOption = ADDR_ANY + portOption;
+    }
+    return portOption;
+}
 
 int main(int argc, char **argv)
 {
@@ -1457,6 +1599,10 @@ int main(int argc, char **argv)
                 uninstall + stop + start + enable + disable + enable_hotspot + 
                 disable_hotspot + restart + enable_p2p + disable_p2p + list_p2p_channels + 
                 fix_permissions + list_wifi_country_codes;
+        if (actionCount == 0 && portOption.length() != 0)
+        {
+            ++actionCount;
+        }
         if (actionCount > 1)
         {
             throw std::runtime_error("Please provide only one action.");
@@ -1553,12 +1699,6 @@ int main(int argc, char **argv)
     {
         return ListP2PChannels(parser.Arguments());
     }
-    if (portOption.size() != 0 && !install)
-    {
-        cout << "Error: -port option can only be specified with the -install option."
-             << "\n";
-        exit(EXIT_FAILURE);
-    }
 
     auto uid = getuid();
     if (uid != 0 && !nosudo)
@@ -1568,6 +1708,12 @@ int main(int argc, char **argv)
 
     try
     {
+        if (portOption.length() != 0 && !install)
+        {
+            portOption = ProcessPortOption(portOption);
+            SetWebServerPort(portOption);
+            return EXIT_SUCCESS;
+        }
         if (fix_permissions)
         {
             FixPermissions();
@@ -1595,20 +1741,11 @@ int main(int argc, char **argv)
                     }
                 }
 
-                if (portOption == "")
+                portOption = ProcessPortOption(portOption);
-                {
+
-                    portOption = GetCurrentWebServicePort();
-                    if (portOption == "")
-                    {
-                        portOption = "80";
-                    }
-                }
-                if (portOption.find(':') == string::npos)
-                {
-                    portOption = "0.0.0.0:" + portOption;
-                }
                 Install(prefix, portOption);
                 FileSystemSync();
+
             }
             catch (const std::exception &e)
             {

src/Lv2PluginChangeMonitor.cpp

@@ -44,7 +44,7 @@ void Lv2PluginChangeMonitor::Shutdown()
     {
         terminateThread = true;
         uint64_t val = 1;
-        write(shutdown_eventfd,(void*)&val, sizeof(val));
+        auto _ = write(shutdown_eventfd,(void*)&val, sizeof(val));
         monitorThread->join();
         monitorThread = nullptr;
         close(shutdown_eventfd);

src/SchedulerPriority.cpp

@@ -24,25 +24,22 @@
 #include "ss.hpp"
 #include <stdexcept>
 
-#ifdef __linux__
+#include <unistd.h> // for nice().
-#include "unistd.h" // for nice()`
+
-#endif
 
 using namespace pipedal;
 
-static constexpr int EXPECTED_RT_THREAD_PRIORITY_MAX = 81;
+static constexpr int EXPECTED_RT_THREAD_PRIORITY_MAX = 95;
 
-static constexpr int RT_AUDIO_THREAD_PRIORITY = 80;
+static constexpr int RT_AUDIO_THREAD_PRIORITY = 90; // one above pipewire.
-static constexpr int NICE_AUDIO_THREAD_PRIORITY = -19;
 
-static constexpr int RT_AUDIOSERVICE_THREAD_PRIORITY = 10;
+static constexpr int RT_AUDIOSERVICE_THREAD_PRIORITY = 85; // one above pipewire service thread
-static constexpr int NICE_AUDIOSERVICE_THREAD_PRIORITY = -17;
 
-static constexpr int RT_LV2SCHEDULER_THREAD_PRIORITY = -1;
+static constexpr int RT_LV2SCHEDULER_THREAD_PRIORITY = 5;
-static constexpr int NICE_LV2SCHEDULER_THREAD_PRIORITY = 2; // nice(2): don't let plugins screw things up by pinning the CPU 
 
 static constexpr int RT_WEBSERVER_THREAD_PRIORITY = -1;
-static constexpr int NICE_WEBSERVER_THREAD_PRIORITY = -2; // don't get bogged down by UI threads.
+
+static constexpr int NICE_WEBSERVER_PROCESS_PRIORITY = -9; // above chrome renderer, below pipewire..
 
 bool pipedal::IsRtPreemptKernel(SchedulerPriority priority)
 {
@@ -71,7 +68,7 @@ bool pipedal::IsRtPreemptKernel(SchedulerPriority priority)
     #endif
 }
 
-static void SetPriority(int realtimePriority, int nicePriority, const char *priorityName)
+static void SetPriority(int realtimePriority, const char *priorityName)
 {
 
     if (realtimePriority != -1)
@@ -79,12 +76,20 @@ static void SetPriority(int realtimePriority, int nicePriority, const char *prio
         int initialPriority = realtimePriority;
         int min = sched_get_priority_min(SCHED_RR);
         int max = sched_get_priority_max(SCHED_RR);
+        if (max > EXPECTED_RT_THREAD_PRIORITY_MAX)
+        {
+            max = EXPECTED_RT_THREAD_PRIORITY_MAX;
+        }
         if (realtimePriority > max) {
             realtimePriority = max + EXPECTED_RT_THREAD_PRIORITY_MAX-realtimePriority;
         }
         if (realtimePriority < min) {
             realtimePriority = min;
         }
+        if (realtimePriority < 1) 
+        {
+            realtimePriority = 1;
+        }
         if (initialPriority != realtimePriority)
         {
             Lv2Log::warning(
@@ -104,15 +109,9 @@ static void SetPriority(int realtimePriority, int nicePriority, const char *prio
         }
         else
         {
-            Lv2Log::debug(SS("Failed to set RT thread priority for " << priorityName << " (" << strerror(result) << ")"));
+            Lv2Log::warning(SS("Failed to set RT thread priority for " << priorityName << " (" << strerror(result) << ")"));
         }
     }
-    // If the RT scheduler isn't working, fall back to using NICE priority.
-    int result = nice(nicePriority);
-    if (result == -1)
-    {
-        Lv2Log::error(SS("Failed to set thread priority. (" << priorityName << ")"));
-    }
 }
 
 void pipedal::SetThreadPriority(SchedulerPriority priority)
@@ -122,16 +121,27 @@ void pipedal::SetThreadPriority(SchedulerPriority priority)
     switch (priority)
     {
     case SchedulerPriority::RealtimeAudio:
-        SetPriority(RT_AUDIO_THREAD_PRIORITY, NICE_AUDIO_THREAD_PRIORITY, "RealtimeAudio");
+        SetPriority(RT_AUDIO_THREAD_PRIORITY, "RealtimeAudio");
         break;
     case SchedulerPriority::AudioService:
-        SetPriority(RT_AUDIOSERVICE_THREAD_PRIORITY, NICE_AUDIOSERVICE_THREAD_PRIORITY, "AudioService");
+        SetPriority(RT_AUDIOSERVICE_THREAD_PRIORITY, "AudioService");
         break;
     case SchedulerPriority::Lv2Scheduler:
-        SetPriority(RT_LV2SCHEDULER_THREAD_PRIORITY, NICE_LV2SCHEDULER_THREAD_PRIORITY, "Lv2Scheduler");
+        SetPriority(RT_LV2SCHEDULER_THREAD_PRIORITY, "Lv2Scheduler");
         break;
     case SchedulerPriority::WebServerThread:
-        SetPriority(RT_WEBSERVER_THREAD_PRIORITY, NICE_WEBSERVER_THREAD_PRIORITY, "Lv2Scheduler");
+        {
+            // do this by boosting the process priority 
+            int currentNiceValue = nice(0);
+            if (currentNiceValue != NICE_WEBSERVER_PROCESS_PRIORITY)
+            {
+                errno = 0;
+                int ret = nice(NICE_WEBSERVER_PROCESS_PRIORITY-currentNiceValue);
+                if (ret == -1 && errno != 0) {
+                    Lv2Log::error("Failed to set process nice value.");
+                }
+            }
+        }
         break;
     default:
         Lv2Log::error("Invalid scheduler priority.");

src/Worker.cpp

@@ -39,7 +39,6 @@
 #include <lv2/lv2plug.in/ns/ext/worker/worker.h>
 #include "Lv2Log.hpp"
 #include <iostream>
-#include <unistd.h> // for nice(
 #include <utility>
 #include "util.hpp"
 #include "SchedulerPriority.hpp"