ram uint64

Author: scivision

+stdlib/ram_free.m

@@ -6,24 +6,28 @@
 %
 %%% Outputs
 % * freebytes: free physical RAM [bytes]
+%
+% This is done using Java on non-Windows platforms.
+% VisualBasic (needs Windows) is needed to do this with .NET, so we use builtin memory() on Windows.
 
-function freebytes = ram_free()
+function bytes = ram_free()
 
 try
   % memory() was added cross-platform to Octave ~ 2021.
   % Matlab memory() at least through R2025a is still Windows only.
   m = memory();
-  freebytes = m.MemAvailableAllArrays;
+  bytes = uint64(m.MemAvailableAllArrays);
 catch e
   switch e.identifier
     case {'MATLAB:memory:unsupported', 'Octave:undefined-function'}
       b = javaOSBean();
 
       if stdlib.java_api() < 14
-        freebytes = b.getFreePhysicalMemorySize();
+        bytes = b.getFreePhysicalMemorySize();
       else
-        freebytes = b.getFreeMemorySize();
+        bytes = b.getFreeMemorySize();
       end
+      bytes = uint64(bytes);
     otherwise, rethrow(e)
   end
 end

+stdlib/ram_total.m

@@ -9,13 +9,22 @@
 
 function bytes = ram_total()
 
-b = javaOSBean();
+% .NET is about 10 times SLOWER than Java
+% if ispc() && ~stdlib.isoctave()
+%   h = NET.addAssembly('Microsoft.VisualBasic');
+%   ci = Microsoft.VisualBasic.Devices.ComputerInfo();
+%   bytes = ci.TotalPhysicalMemory;
+%   delete(h);
+% else
+  b = javaOSBean();
 
-if stdlib.java_api() < 14
-  bytes = b.getTotalPhysicalMemorySize();
-else
-  bytes = b.getTotalMemorySize();
-end
+  if stdlib.java_api() < 14
+    bytes = b.getTotalPhysicalMemorySize();
+  else
+    bytes = b.getTotalMemorySize();
+  end
+  bytes = uint64(bytes);
+% end
 
 % https://docs.oracle.com/en/java/javase/21/docs/api/jdk.management/com/sun/management/OperatingSystemMXBean.html#getTotalMemorySize()
 

test/TestJava.m

@@ -73,12 +73,6 @@ function test_is_parallel(tc)
 end
 
 
-function test_ram(tc)
-tc.verifyGreaterThan(stdlib.ram_total(), 0)
-tc.verifyGreaterThan(stdlib.ram_free(), 0)
-end
-
-
 function test_cpu_count(tc)
 tc.verifyGreaterThan(stdlib.cpu_count(), 0)
 end

test/TestSys.m

@@ -30,13 +30,27 @@ function test_username(tc)
 tc.verifyGreaterThan(strlength(u), 0)
 end
 
-
 function test_cpu_arch(tc)
 tc.assumeTrue(ispc() || stdlib.has_java())
 
 arch = stdlib.cpu_arch();
 tc.verifyGreaterThan(strlength(arch), 0)
 end
 
+function test_ram(tc)
+tc.assumeTrue(ispc() || stdlib.has_java())
+
+t = stdlib.ram_total();
+f = stdlib.ram_free();
+
+tc.verifyGreaterThan(t, 0)
+tc.verifyGreaterThan(f, 0)
+
+tc.verifyLessThanOrEqual(f, t)
+
+tc.verifyClass(t, 'uint64')
+tc.verifyClass(f, 'uint64')
+end
+
 end
 end