MacOS implementation

That's right. I finally have access to a Mac, and (not) the time to work on this. Yep, I'm procrastinating something else.
But I think this works, probably.

Author: 2kai2kai2

.github/workflows/npm-publish.yml

@@ -31,9 +31,22 @@ jobs:
         with:
           name: win32-x64
           path: prebuilds/win32-x64/
+  build-darwin-x64:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+      - run: npm install --ignore-scripts
+      - run: npm run prebuild
+      - uses: actions/upload-artifact@v2
+        with:
+          name: darwin-x64
+          path: prebuilds/darwin-x64/
   publish-npm:
     runs-on: ubuntu-latest
-    needs: [build-linux-x64, build-win32-x64]
+    needs: [build-linux-x64, build-win32-x64, build-darwin-x64]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2

.gitignore

@@ -3,4 +3,6 @@ node-addon-api/
 build/
 test/test_linux
 test/test_win.exe
+test/test_mac
+test/test_mem
 prebuilds/

README.md

@@ -38,7 +38,6 @@ npm install node-ps-data
 
 ## Known Issues and Future Plans
 
-- MacOS implementation.
 - Build more binaries for other platforms and architectures.
 - More library functions:
 	- CPU/Memory subcategories (e.g. child process time, pages info, etc.)

binding.gyp

@@ -32,17 +32,14 @@
         "OS=='mac'", {
             "targets": [{
                     "target_name": "node_ps_data",
-                    "sources": ["mac.cc"],
+                    "sources": ["napi.cc", "lib_mac.cc"],
                     "include_dirs": ["./node_modules/node-addon-api"],
                     "cflags!": [ "-fno-exceptions" ],
                     "cflags_cc!": [ "-fno-exceptions" ],
                     "xcode_settings": {
                         "GCC_ENABLE_CPP_EXCEPTIONS": "YES",
                         "CLANG_CXX_LIBRARY": "libc++",
                         "MACOSX_DEPLOYMENT_TARGET": "10.7"
-                    },
-                    "msvs_settings": {
-                        "VCCLCompilerTool": { "ExceptionHandling": 1 }
                     }
             }]
         }]

lib_mac.cc

@@ -0,0 +1,43 @@
+#include "lib.h"
+#include <iostream>
+#include <libproc.h>
+
+/**
+Gets the CPU time used by a process in milliseconds.
+ */
+bool cpuTimeCpp(const size_t& pid, size_t& user, size_t& kernel) {
+    proc_taskinfo info;
+    int ret = proc_pidinfo(pid, PROC_PIDTASKINFO, 0, (void*)&info,
+                           PROC_PIDTASKINFO_SIZE);
+    if (ret > 0) {
+        // Success!
+        user = info.pti_total_user / 1000000;
+        kernel = info.pti_total_system / 1000000;
+        return true;
+    } else {
+        std::cerr << "Failed to get data about process " << pid
+                  << " while trying to access cpu data." << std::endl;
+        return false;
+    }
+    return true;
+}
+
+/**
+Gets memory info in bytes.
+*/
+bool memInfoCpp(const size_t& pid, size_t& total, size_t& workingSet) {
+    proc_taskinfo info;
+    int ret = proc_pidinfo(pid, PROC_PIDTASKINFO, 0, (void*)&info,
+                           PROC_PIDTASKINFO_SIZE);
+    if (ret > 0) {
+        // Success!
+        total = info.pti_resident_size + info.pti_virtual_size;
+        workingSet = info.pti_resident_size;
+        return true;
+    } else {
+        std::cerr << "Failed to get data about process " << pid
+                  << " while trying to access memory data." << std::endl;
+        return false;
+    }
+    return true;
+}