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dot_tmux/plugins/tmux-mem-cpu-load/netbsd/memory.cc

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+/* vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
+ *
+ * Copyright 2012 Matthew McCormick
+ * Copyright 2015 Pawel 'l0ner' Soltys
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sstream>
+#include <string>
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <uvm/uvm_extern.h> // uvmexp struct
+
+#include "error.h"
+#include "conversions.h"
+#include "memory.h"
+
+void mem_status( MemoryStatus & status )
+{
+  // get vm memory stats
+  static int vm_totalmem[] = { CTL_VM, VM_UVMEXP2 };
+  struct uvmexp_sysctl mem;
+  size_t size = sizeof( mem );
+  if( sysctl( vm_totalmem, 2, &mem, &size, NULL, 0 ) < 0 )
+  {
+    error( "memory: error getting vm memory stats" );
+  }
+
+  int64_t total_mem = ( mem.npages << mem.pageshift );
+  int64_t used_mem =
+    ( mem.active + mem.wired - mem.filepages ) << mem.pageshift;
+
+  // add 1 to used which gets lost somewhere along conversions
+  status.used_mem = convert_unit(static_cast< float >( used_mem ), MEGABYTES );
+  status.total_mem = convert_unit(static_cast< float >( total_mem ), MEGABYTES );
+}