add get_process_priority()

Author: scivision

+stdlib/+dotnet/get_process_priority.m

@@ -0,0 +1,6 @@
+function i = get_process_priority()
+
+p = System.Diagnostics.Process.GetCurrentProcess();
+i = p.PriorityClass;
+
+end

+stdlib/+python/get_process_priority.m

@@ -0,0 +1,10 @@
+function i = get_process_priority()
+
+if ispc()
+  i = [];
+else
+  pid = py.os.getpid();
+  i = double(py.os.getpriority(py.os.PRIO_PROCESS, pid));
+end
+
+end

+stdlib/+sys/get_process_priority.m

@@ -0,0 +1,22 @@
+function [i, cmd] = get_process_priority()
+
+pid = stdlib.get_pid();
+
+if ispc()
+  cmd = sprintf('pwsh -c "(Get-Process -Id %d).PriorityClass"', pid);
+else
+  cmd = sprintf('ps -o ni= -p %d', pid);
+end
+
+[s, m] = system(cmd);
+if s == 0
+  if ispc()
+    i = strip(m);
+  else
+    i = str2double(m);
+  end
+else
+  i = [];
+end
+
+end

+stdlib/Backend.m

@@ -84,7 +84,7 @@
       switch functionName
         case {'filesystem_type', 'is_removable', 'ram_total', 'ram_free'}
           if ~stdlib.python.has_psutil(); continue, end
-        case {'cpu_load', 'get_owner', 'get_uid'}
+        case {'cpu_load', 'get_owner', 'get_process_priority', 'get_uid'}
           if ispc(), continue, end
         case 'is_admin'
           if ispc() || stdlib.matlabOlderThan('R2024a'), continue, end

+stdlib/get_process_priority.m

@@ -0,0 +1,15 @@
+%% GET_PROCESS_PRIORITY get priority of the current Matlab session
+% This is an integer value like "nice" on Unix-like systems
+% On Windows systems the char value is like 'Normal'
+
+function [i, b] = get_process_priority(backend)
+arguments
+  backend (1,:) string = ["dotnet", "python", "sys"]
+end
+
+o = stdlib.Backend(mfilename(), backend);
+i = o.func();
+
+b = o.backend;
+
+end

test/TestSys.m

@@ -13,10 +13,11 @@
 B_hostname
 B_username
 B_get_uid
+B_get_process_priority
 end
 
 methods (TestParameterDefinition, Static)
-function [B_cpu_arch, B_cpu_load, B_ram_free, B_ram_total, B_is_admin, B_os_version, B_hostname, B_username, B_get_uid] = setupBackends()
+function [B_cpu_arch, B_cpu_load, B_ram_free, B_ram_total, B_is_admin, B_os_version, B_hostname, B_username, B_get_uid, B_get_process_priority] = setupBackends()
 B_cpu_arch = init_backend("cpu_arch");
 B_cpu_load = init_backend("cpu_load");
 B_ram_free = init_backend("ram_free");
@@ -26,6 +27,7 @@
 B_hostname = init_backend("hostname");
 B_username = init_backend("get_username");
 B_get_uid = init_backend('get_uid');
+B_get_process_priority = init_backend('get_process_priority');
 end
 end
 
@@ -49,6 +51,12 @@ function test_cpu_load(tc, B_cpu_load)
 end
 
 
+function test_process_priority(tc, B_get_process_priority)
+r = stdlib.get_process_priority(B_get_process_priority);
+tc.verifyNotEmpty(r)
+end
+
+
 function test_os_version(tc, B_os_version)
 [os, ver] = stdlib.os_version(B_os_version);