Merge pull request #98 from NativeScript/ios-uptime

Add function to obtain the time since the process started

android/widgets/src/main/java/org/nativescript/Process.java

@@ -0,0 +1,59 @@
+package org.nativescript;
+
+import android.os.SystemClock;
+import android.util.Log;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+
+/**
+ * Created by cankov on 15/05/2017.
+ */
+public class Process {
+    static long startTime = -1;
+
+    public static long getStartTime() {
+        if (startTime != -1) {
+            return startTime;
+        }
+
+        try {
+            int pid = android.os.Process.myPid();
+            final String path = "/proc/" + pid + "/stat";
+            final BufferedReader reader = new BufferedReader(new FileReader(path));
+            final String stat;
+            try {
+                stat = reader.readLine();
+            } finally {
+                reader.close();
+            }
+            final String field2End = ") ";
+            final String fieldSep = " ";
+            final int fieldStartTime = 20;
+            final int msInSec = 1000;
+
+            final String[] fields = stat.substring(stat.lastIndexOf(field2End)).split(fieldSep);
+            final long t = Long.parseLong(fields[fieldStartTime]);
+            int tckName;
+            try {
+                tckName = Class.forName("android.system.OsConstants").getField("_SC_CLK_TCK").getInt(null);
+            } catch (ClassNotFoundException e) {
+                tckName = Class.forName("libcore.io.OsConstants").getField("_SC_CLK_TCK").getInt(null);
+            }
+            final Object os = Class.forName("libcore.io.Libcore").getField("os").get(null);
+            final long tck = (Long) os.getClass().getMethod("sysconf", Integer.TYPE).invoke(os, tckName);
+            startTime = t * msInSec / tck;
+        } catch (Exception e) {
+            Log.v("JS", "Failed to get process start time. Using the current time as start time. Error: " + e);
+            startTime = SystemClock.elapsedRealtime();
+        }
+
+        return startTime;
+    }
+
+    public static long getUpTime() {
+        long startTime = getStartTime();
+        long currentTime = SystemClock.elapsedRealtime();
+        return currentTime - startTime;
+    }
+}

ios/TNSWidgets/TNSProcess.h

@@ -0,0 +1,17 @@
+//
+//  TNSProcess.h
+//  TNSWidgets
+//
+//  Created by Panayot Cankov on 15/05/2017.
+//  Copyright © 2017 Telerik A D. All rights reserved.
+//
+
+#ifndef TNSProcess_h
+#define TNSProcess_h
+
+/**
+ * Get the milliseconds since the process started.
+ */
+double __tns_uptime();
+
+#endif /* TNSProcess_h */

ios/TNSWidgets/TNSProcess.m

@@ -0,0 +1,28 @@
+//
+//  TNSProcess.c
+//  TNSWidgets
+//
+//  Created by Panayot Cankov on 15/05/2017.
+//  Copyright © 2017 Telerik A D. All rights reserved.
+//
+
+#include "TNSProcess.h"
+
+#import <Foundation/Foundation.h>
+
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+double __tns_uptime() {
+    pid_t pid = [[NSProcessInfo processInfo] processIdentifier];
+    int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid };
+    struct kinfo_proc proc;
+    size_t size = sizeof(proc);
+    sysctl(mib, 4, &proc, &size, NULL, 0);
+
+    struct timeval current;
+    gettimeofday(&current, NULL);
+
+    return (double)(current.tv_sec - proc.kp_proc.p_starttime.tv_sec) * 1000.0 + (double)(current.tv_usec - proc.kp_proc.p_starttime.tv_usec) / 1000.0;
+}

ios/TNSWidgets/TNSWidgets.xcodeproj/project.pbxproj

@@ -9,6 +9,8 @@
 /* Begin PBXBuildFile section */
 		8B7321CF1D097ECD00884AC6 /* TNSLabel.h in Headers */ = {isa = PBXBuildFile; fileRef = 8B7321CD1D097ECD00884AC6 /* TNSLabel.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		8B7321D01D097ECD00884AC6 /* TNSLabel.m in Sources */ = {isa = PBXBuildFile; fileRef = 8B7321CE1D097ECD00884AC6 /* TNSLabel.m */; };
+		F915D3551EC9EF5E00071914 /* TNSProcess.m in Sources */ = {isa = PBXBuildFile; fileRef = F915D3531EC9EF5E00071914 /* TNSProcess.m */; };
+		F915D3561EC9EF5E00071914 /* TNSProcess.h in Headers */ = {isa = PBXBuildFile; fileRef = F915D3541EC9EF5E00071914 /* TNSProcess.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		F98F5CB31CD0EFEA00978308 /* TNSWidgets.h in Headers */ = {isa = PBXBuildFile; fileRef = F98F5CB21CD0EFEA00978308 /* TNSWidgets.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		F98F5CBA1CD0EFEA00978308 /* TNSWidgets.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = F98F5CAF1CD0EFEA00978308 /* TNSWidgets.framework */; };
 		F98F5CBF1CD0EFEA00978308 /* TNSWidgetsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F98F5CBE1CD0EFEA00978308 /* TNSWidgetsTests.m */; };
@@ -29,6 +31,8 @@
 /* Begin PBXFileReference section */
 		8B7321CD1D097ECD00884AC6 /* TNSLabel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TNSLabel.h; sourceTree = "<group>"; };
 		8B7321CE1D097ECD00884AC6 /* TNSLabel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TNSLabel.m; sourceTree = "<group>"; };
+		F915D3531EC9EF5E00071914 /* TNSProcess.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = TNSProcess.m; path = ../TNSProcess.m; sourceTree = "<group>"; };
+		F915D3541EC9EF5E00071914 /* TNSProcess.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = TNSProcess.h; path = ../TNSProcess.h; sourceTree = "<group>"; };
 		F98F5CAF1CD0EFEA00978308 /* TNSWidgets.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = TNSWidgets.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		F98F5CB21CD0EFEA00978308 /* TNSWidgets.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = TNSWidgets.h; sourceTree = "<group>"; };
 		F98F5CB41CD0EFEA00978308 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -79,6 +83,8 @@
 		F98F5CB11CD0EFEA00978308 /* TNSWidgets */ = {
 			isa = PBXGroup;
 			children = (
+				F915D3531EC9EF5E00071914 /* TNSProcess.m */,
+				F915D3541EC9EF5E00071914 /* TNSProcess.h */,
 				F98F5CB21CD0EFEA00978308 /* TNSWidgets.h */,
 				8B7321CD1D097ECD00884AC6 /* TNSLabel.h */,
 				8B7321CE1D097ECD00884AC6 /* TNSLabel.m */,
@@ -105,6 +111,7 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				F915D3561EC9EF5E00071914 /* TNSProcess.h in Headers */,
 				F98F5CB31CD0EFEA00978308 /* TNSWidgets.h in Headers */,
 				F98F5CCB1CD0F09E00978308 /* UIImage+TNSBlocks.h in Headers */,
 				8B7321CF1D097ECD00884AC6 /* TNSLabel.h in Headers */,
@@ -208,6 +215,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				8B7321D01D097ECD00884AC6 /* TNSLabel.m in Sources */,
+				F915D3551EC9EF5E00071914 /* TNSProcess.m in Sources */,
 				F98F5CCC1CD0F09E00978308 /* UIImage+TNSBlocks.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

ios/TNSWidgets/TNSWidgets/TNSWidgets.h

@@ -18,3 +18,4 @@ FOUNDATION_EXPORT const unsigned char TNSWidgetsVersionString[];
 
 #import "UIImage+TNSBlocks.h"
 #import "TNSLabel.h"
+#import "TNSProcess.h"