ram: streamline

Author: scivision

+stdlib/+java/ram_free.m

@@ -1,11 +1,16 @@
 function bytes = ram_free()
 
-b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
+try
+  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
 
-if stdlib.java_api() < 14
-  bytes = b.getFreePhysicalMemorySize();
-else
-  bytes = b.getFreeMemorySize();
+  if stdlib.java_api() < 14
+    bytes = b.getFreePhysicalMemorySize();
+  else
+    bytes = b.getFreeMemorySize();
+  end
+catch e
+  javaException(e)
+  bytes = uint64.empty;
 end
 
 bytes = uint64(bytes);

+stdlib/+java/ram_total.m

@@ -4,12 +4,17 @@
 
 % https://docs.oracle.com/en/java/javase/21/docs/api/jdk.management/com/sun/management/OperatingSystemMXBean.html#getTotalMemorySize()
 
-b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
+try
+  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
 
-if stdlib.java_api() < 14
-  bytes = b.getTotalPhysicalMemorySize();
-else
-  bytes = b.getTotalMemorySize();
+  if stdlib.java_api() < 14
+    bytes = b.getTotalPhysicalMemorySize();
+  else
+    bytes = b.getTotalMemorySize();
+  end
+catch e
+  javaException(e)
+  bytes = [];
 end
 
 bytes = uint64(bytes);

+stdlib/ram_free.m

@@ -8,19 +8,34 @@
 %%% Inputs
 % * backend: backend to use
 %%% Outputs
-% * freebytes: free physical RAM [bytes]
+% * i: free physical RAM [bytes]
 % * b: backend used
 
 
-function [bytes, b] = ram_free(backend)
+function [i, b] = ram_free(backend)
 arguments
   backend (1,:) string = ["java", "python", "sys"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
-bytes = o.func();
+i = uint64.empty;
 
-b = o.backend;
+for b = backend
+  switch b
+    case 'java'
+      i = stdlib.java.ram_free();
+    case 'python'
+      if stdlib.matlabOlderThan('R2022a'), continue, end
+      i = stdlib.python.ram_free();
+    case 'sys'
+      i = stdlib.sys.ram_free();
+    otherwise
+      error("stdlib:ram_free:ValueError", "Unknown backend: %s", b)
+  end
+
+  if ~isempty(i)
+    return
+  end
+end
 
 % * VisualBasic (needs Windows) is needed to do this with .NET.
 % * builtin memory() on Windows includes swap. The user could do that themselves.

+stdlib/ram_total.m

@@ -6,17 +6,34 @@
 %%% Inputs
 % * backend: backend to use
 %%% Outputs
-% * bytes: total physical RAM [bytes]
+% * i: total physical RAM [bytes]
 % * b: backend used
 
-function [bytes, b] = ram_total(backend)
+function [i, b] = ram_total(backend)
 arguments
   backend (1,:) string = ["java", "dotnet", "python", "sys"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
-bytes = o.func();
+i = uint64.empty;
 
-b = o.backend;
+for b = backend
+  switch b
+    case 'dotnet'
+      i = stdlib.dotnet.ram_total();
+    case 'java'
+      i = stdlib.java.ram_total();
+    case 'python'
+      if stdlib.matlabOlderThan('R2022a'), continue, end
+      i = stdlib.python.ram_total();
+    case 'sys'
+      i = stdlib.sys.ram_total();
+    otherwise
+      error("stdlib:ram_total:ValueError", "Unknown backend: %s", b)
+  end
+
+  if ~isempty(i)
+    return
+  end
+end
 
 end