adding process id to tmp file to allow for concurrency

Author: onomojo

lib/mj-page.js

@@ -87,7 +87,7 @@ var MathJax;                       // filled in once MathJax is loaded
 var serverState = STATE.STOPPED;   // nothing loaded yet
 var timer;                         // used to reset MathJax if it runs too long
 
-var tmpfile = os.tmpdir() + "/mj-single-svg";  // file name prefix to use for temp files
+var tmpfile = os.tmpdir() + "/mj-single-svg" +  process.pid;  // file name prefix to use for temp files
 
 var document, window, content, html; // the DOM elements
 

lib/mj-single.js

@@ -85,7 +85,7 @@ var MathJaxConfig;                   // configuration for when starting MathJax
 var MathJax;                         // filled in once MathJax is loaded
 var serverState = STATE.STOPPED;     // nothing loaded yet
 var timer;                           // used to reset MathJax if it runs too long
-var tmpfile = os.tmpdir() + "/mj-single-svg";  // file name prefix to use for temp files
+var tmpfile = os.tmpdir() + "/mj-single-svg" +  process.pid;  // file name prefix to use for temp files
 
 var document, window, content, html; // the DOM elements