66735: implement blocking processes on the mac.

xpcom/threads/nsProcessMac.cpp

@@ -20,6 +20,7 @@
  *
  * Contributor(s): 
  *     Don Bragg <dbragg@netscape.com>
+ *     Samir Gehani <sgehani@netscape.com>
  */
 
 /*****************************************************************************
@@ -37,6 +38,7 @@
 
 #include "prtypes.h"
 #include "prio.h"
+#include "prthread.h"
 
 #include <stdlib.h>
 #include <Processes.h>
@@ -81,26 +83,54 @@ nsProcess::Init(nsIFile* executable)
 NS_IMETHODIMP  
 nsProcess::Run(PRBool blocking, const char **args, PRUint32 count, PRUint32 *pid)
 {
- 	OSErr err = noErr;
-	LaunchParamBlockRec	launchPB;
-    FSSpec* targetSpec;
+    OSErr err = noErr;
+    LaunchParamBlockRec	launchPB;
+    FSSpec resolvedSpec;
+    Boolean bDone = false;
+    ProcessInfoRec info;
 
     nsCOMPtr<nsILocalFileMac> macExecutable = do_QueryInterface(mExecutable);
-    macExecutable->GetFSSpec(targetSpec);
-    
-	launchPB.launchAppSpec = targetSpec;
-	launchPB.launchAppParameters = NULL;
-	launchPB.launchBlockID = extendedBlock;
-	launchPB.launchEPBLength = extendedBlockLen;
-	launchPB.launchFileFlags = NULL;
-	launchPB.launchControlFlags = launchContinue + launchNoFileFlags + launchUseMinimum;
-	launchPB.launchControlFlags += launchDontSwitch;
+    macExecutable->GetResolvedFSSpec(&resolvedSpec);
 
-	err = LaunchApplication(&launchPB);
-	if (err != noErr)
-		return NS_ERROR_FAILURE;
+    launchPB.launchAppSpec = &resolvedSpec;
+    launchPB.launchAppParameters = NULL;
+    launchPB.launchBlockID = extendedBlock;
+    launchPB.launchEPBLength = extendedBlockLen;
+    launchPB.launchFileFlags = NULL;
+    launchPB.launchControlFlags = launchContinue + launchNoFileFlags + launchUseMinimum;
+    if (!blocking)
+        launchPB.launchControlFlags += launchDontSwitch;
+
+    err = LaunchApplication(&launchPB);
+    if (err != noErr)
+        return NS_ERROR_FAILURE;
 	
-	return NS_OK;
+    // NOTE: blocking mode assumes you are running on a thread 
+    //       other than the UI thread that has teh main event loop
+    if (blocking)
+    {
+        do 
+        {   
+            info.processInfoLength = sizeof(ProcessInfoRec);
+            info.processName = nil;
+            info.processAppSpec = nil;
+            err = GetProcessInformation(&launchPB.launchProcessSN, &info);
+            
+            if (err == noErr)
+            {
+                // still running so sleep some more (200 msecs)
+                PR_Sleep(200);
+            }
+            else
+            {
+                // no longer in process manager's internal list: so assume done
+                bDone = true;
+            }
+        } 
+        while (!bDone);	        
+    }
+
+    return NS_OK;
 }
 
 NS_IMETHODIMP nsProcess::InitWithPid(PRUint32 pid)