Minor fix for race condition during profile reloadings

.github/release-nest-v3

@@ -1 +1 @@
-2
+1

falcond/debian/changelog

@@ -1,3 +1,9 @@
+falcond (1.0.2-101pika1) pika; urgency=low
+
+  * Minor fix for race condition during profile reloadings
+
+ -- ferreo <ferreo@pika-os.com>  Sun, 12 Jan 2025 13:48:00 +0300
+
 falcond (1.0.1-101pika5) pika; urgency=low
 
   * Add config and profile autowatching + config for proton system files

falcond/src/daemon.zig

@@ -75,17 +75,21 @@ pub const Daemon = struct {
             map.clearRetainingCapacity();
         }
 
-        const config = try Config.load(self.allocator, self.config_path);
-        const power_profiles = try PowerProfiles.init(self.allocator, config);
+        if (self.profile_manager.active_profile != null) {
+            try self.profile_manager.unloadProfile(self.profile_manager.active_profile.?);
+        }
+
+        self.profile_manager.deinit();
         self.power_profiles.deinit();
         self.config.deinit();
+
+        const config = try Config.load(self.allocator, self.config_path);
+        const power_profiles = try PowerProfiles.init(self.allocator, config);
+        var profile_manager = ProfileManager.init(self.allocator, power_profiles, config);
+        try ProfileLoader.loadProfiles(self.allocator, &profile_manager.profiles, &profile_manager.proton_profile, self.oneshot);
         self.config = config;
         self.power_profiles = power_profiles;
         self.performance_mode = self.power_profiles.isPerformanceAvailable();
-
-        var profile_manager = ProfileManager.init(self.allocator, power_profiles, config);
-        try ProfileLoader.loadProfiles(self.allocator, &profile_manager.profiles, &profile_manager.proton_profile, self.oneshot);
-        self.profile_manager.deinit();
         self.profile_manager = profile_manager;
     }
 

falcond/src/profile/manager.zig

@@ -97,6 +97,23 @@ pub const ProfileManager = struct {
         }
     }
 
+    pub fn unloadProfile(self: *ProfileManager, profile: *const Profile) !void {
+        if (self.active_profile) |active| {
+            if (active == profile) {
+                std.log.info("Unloading profile: {s}", .{profile.name});
+
+                if (profile.performance_mode and self.power_profiles.isPerformanceAvailable()) {
+                    std.log.info("Disabling performance mode for profile: {s}", .{profile.name});
+                    self.power_profiles.disablePerformanceMode();
+                }
+
+                vcache_setting.applyVCacheMode(.none);
+                try scx_scheds.deactivateScheduler(self.allocator);
+                self.active_profile = null;
+            }
+        }
+    }
+
     pub fn matchProcess(self: *ProfileManager, arena: std.mem.Allocator, pid: []const u8, process_name: []const u8) !?*const Profile {
         return matcher.matchProcess(self.profiles.items, self.proton_profile, arena, pid, process_name, self.config);
     }

falcond/src/profile/matcher.zig

@@ -3,32 +3,6 @@ const types = @import("types.zig");
 const Profile = types.Profile;
 const Config = @import("../config/config.zig").Config;
 
-// Don't match Wine/Proton infrastructure
-// const system_processes = [_][]const u8{
-//     "steam.exe",
-//     "services.exe",
-//     "winedevice.exe",
-//     "plugplay.exe",
-//     "svchost.exe",
-//     "explorer.exe",
-//     "rpcss.exe",
-//     "tabtip.exe",
-//     "wineboot.exe",
-//     "rundll32.exe",
-//     "iexplore.exe",
-//     "conhost.exe",
-//     "crashpad_handler.exe",
-//     "iscriptevaluator.exe",
-//     "VC_redist.x86.exe",
-//     "VC_redist.x64.exe",
-//     "cmd.exe",
-//     "REDEngineErrorReporter.exe",
-//     "REDprelauncher.exe",
-//     "SteamService.exe",
-//     "UnityCrashHandler64.exe",
-//     "start.exe",
-// };
-
 pub fn isProtonParent(arena: std.mem.Allocator, pid: []const u8) !bool {
     var path_buf: [std.fs.max_path_bytes]u8 = undefined;
     const status_path = try std.fmt.bufPrint(&path_buf, "/proc/{s}/status", .{pid});