getpid: broader compatibility

Author: scivision

+stdlib/get_pid.m

@@ -2,10 +2,17 @@
 
 function pid = get_pid()
 
-if stdlib.matlabOlderThan('R2025a')
-  pid = feature('getpid'); %#ok<FEATGPID>
-else
+try
   pid = matlabProcessID;
+catch e
+  switch e.identifier
+    case 'MATLAB:UndefinedFunction'
+      pid = feature('getpid');
+    case 'Octave:undefined-function'
+      pid = getpid();
+    otherwise
+      rethrow(e)
+  end
 end
 
 pid = uint64(pid);

+stdlib/is_exe.m

@@ -2,11 +2,9 @@
 % does not check if the file is actually a binary executable
 %
 %%% inputs
-% file: path to check
+% * file: path to check
 %%% Outputs
-% ok: true if path is a file and has executable permissions
-%
-% this method is like 40x faster than native.
+% * y: true if path is a file and has executable permissions
 
 function y = is_exe(file)
 

+stdlib/is_readable.m

@@ -1,11 +1,9 @@
 %% IS_READABLE is file readable
 %
 %%% Inputs
-% file: single path string
+% * file: single path string
 %%% Outputs
-% y: true if file is readable
-%
-% this method is like 40x faster than native
+% * y: true if file is readable
 
 function y = is_readable(file)
 

+stdlib/is_writable.m

@@ -4,8 +4,6 @@
 % * file: path to file or folder
 %%% Outputs
 % * y: true if file is writable
-%
-% this method is like 40x faster than native
 
 function y = is_writable(file)
 

Readme.md

@@ -23,7 +23,7 @@ Matlab R2017a and newer:
 test_main
 ```
 
-For the functions compatible with GNU Octave:
+For the functions compatible with GNU Octave, from the matlab-stdlib/ directory:
 
 ```octave
 addpath(pwd)