src/mac/corefoundation/utilsexc_cf.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/corefoundation/utilsexec_cf.cpp
   3 // Purpose:     Execution-related utilities for Darwin
   4 // Author:      David Elliott
   5 // Modified by: Stefan Csomor (added necessary wxT for unicode builds)
   6 // Created:     2004-11-04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Elliott
   9 // Licence:     wxWindows licence
  10 // Notes:       This code comes from src/mac/carbon/utilsexc.cpp,1.11
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #include "wx/wxprec.h"
  14 #ifndef WX_PRECOMP
  15     #include "wx/log.h"
  16     #include "wx/utils.h"
  17 #endif //ndef WX_PRECOMP
  18 #include "wx/unix/execute.h"
  19
  20 #include <CoreFoundation/CFMachPort.h>
  21 #include <sys/wait.h>
  22 extern "C" {
  23 #include <mach/mach.h>
  24 }
  25
  26 void wxMAC_MachPortEndProcessDetect(CFMachPortRef port, void *data)
  27 {
  28     wxEndProcessData *proc_data = (wxEndProcessData*)data;
  29     wxLogDebug(wxT("Wow.. this actually worked!"));
  30     int status = 0;
  31     int rc = waitpid(abs(proc_data->pid), &status, WNOHANG);
  32     if(!rc)
  33     {
  34         wxLogDebug(wxT("Mach port was invalidated, but process hasn't terminated!"));
  35         return;
  36     }
  37     if((rc != -1) && WIFEXITED(status))
  38         proc_data->exitcode = WEXITSTATUS(status);
  39     else
  40         proc_data->exitcode = -1;
  41     wxHandleProcessTermination(proc_data);
  42 }
  43
  44 int wxAddProcessCallbackForPid(wxEndProcessData *proc_data, int pid)
  45 {
  46     if(pid < 1)
  47         return -1;
  48     kern_return_t    kernResult;
  49     mach_port_t    taskOfOurProcess;
  50     mach_port_t    machPortForProcess;
  51     taskOfOurProcess = mach_task_self();
  52     if(taskOfOurProcess == MACH_PORT_NULL)
  53     {
  54         wxLogDebug(wxT("No mach_task_self()"));
  55         return -1;
  56     }
  57     wxLogDebug(wxT("pid=%d"),pid);
  58     kernResult = task_for_pid(taskOfOurProcess,pid, &machPortForProcess);
  59     if(kernResult != KERN_SUCCESS)
  60     {
  61         wxLogDebug(wxT("no task_for_pid()"));
  62         // try seeing if it is already dead or something
  63         // FIXME: a better method would be to call the callback function
  64         // from idle time until the process terminates. Of course, how
  65         // likely is it that it will take more than 0.1 seconds for the
  66         // mach terminate event to make its way to the BSD subsystem?
  67         usleep(100); // sleep for 0.1 seconds
  68         wxMAC_MachPortEndProcessDetect(NULL, (void*)proc_data);
  69         return -1;
  70     }
  71     CFMachPortContext termcb_contextinfo;
  72     termcb_contextinfo.version = NULL;
  73     termcb_contextinfo.info = (void*)proc_data;
  74     termcb_contextinfo.retain = NULL;
  75     termcb_contextinfo.release = NULL;
  76     termcb_contextinfo.copyDescription = NULL;
  77     CFMachPortRef    CFMachPortForProcess;
  78     Boolean        ShouldFreePort;
  79     CFMachPortForProcess = CFMachPortCreateWithPort(NULL, machPortForProcess, NULL, &termcb_contextinfo, &ShouldFreePort);
  80     if(!CFMachPortForProcess)
  81     {
  82         wxLogDebug(wxT("No CFMachPortForProcess"));
  83         mach_port_deallocate(taskOfOurProcess, machPortForProcess);
  84         return -1;
  85     }
  86     if(ShouldFreePort)
  87     {
  88         kernResult = mach_port_deallocate(taskOfOurProcess, machPortForProcess);
  89         if(kernResult!=KERN_SUCCESS)
  90         {
  91             wxLogDebug(wxT("Couldn't deallocate mach port"));
  92             return -1;
  93         }
  94     }
  95     CFMachPortSetInvalidationCallBack(CFMachPortForProcess, &wxMAC_MachPortEndProcessDetect);
  96     CFRunLoopSourceRef    runloopsource;
  97     runloopsource = CFMachPortCreateRunLoopSource(NULL,CFMachPortForProcess, (CFIndex)0);
  98     if(!runloopsource)
  99     {
 100         wxLogDebug(wxT("Couldn't create runloopsource"));
 101         return -1;
 102     }
 103
 104     CFRelease(CFMachPortForProcess);
 105
 106     CFRunLoopAddSource(CFRunLoopGetCurrent(),runloopsource,kCFRunLoopDefaultMode);
 107     CFRelease(runloopsource);
 108     wxLogDebug(wxT("Successfully added notification to the runloop"));
 109     return 0;
 110 }
 111