More signal hackery

p4raw-id: //depot/perlio@14167

diff --git a/win32/win32.c b/win32/win32.c
index 211efbe..9dd9bea 100644 (file)
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -22,6 +22,7 @@
 #endif
 #include <winnt.h>
 #include <io.h>
+#include <signal.h>
 
 /* #include "config.h" */
 
@@ -1083,6 +1084,7 @@ win32_kill(int pid, int sig)
            hProcess = w32_pseudo_child_handles[child];
            switch (sig) {
            case 0:
+               /* "Does process exist?" use of kill */
                return 0;
            case 9:
                 /* kill -9 style un-graceful exit */
@@ -1092,7 +1094,7 @@ win32_kill(int pid, int sig)
                }
                break;
            default:
-               /* We fake signals to pseudo-processes using message queue */
+               /* We fake signals to pseudo-processes using Win32 message queue */
                if (PostThreadMessage(-pid,WM_USER,sig,0)) {
                    /* It might be us ... */ 
                    PERL_ASYNC_CHECK();
@@ -1114,11 +1116,13 @@ win32_kill(int pid, int sig)
             hProcess = w32_child_handles[child];
            switch(sig) {
            case 0:
+               /* "Does process exist?" use of kill */
                return 0;
            case 2:
                if (GenerateConsoleCtrlEvent(CTRL_C_EVENT,pid))
                    return 0;
                break;
+           default: /* For now be backwards compatible with perl5.6 */
            case 9:
                if (TerminateProcess(hProcess, sig)) {
                    remove_dead_process(child);
@@ -1134,11 +1138,13 @@ alien_process:
            if (hProcess) {
                switch(sig) {
                case 0:
+                   /* "Does process exist?" use of kill */
                    return 0;
                case 2:
                    if (GenerateConsoleCtrlEvent(CTRL_C_EVENT,pid))
                        return 0;
                    break;
+               default: /* For now be backwards compatible with perl5.6 */
                 case 9:
                    if (TerminateProcess(hProcess, sig)) {
                        CloseHandle(hProcess);
@@ -1728,8 +1734,9 @@ win32_async_check(pTHX)
            break;
 #endif
 
-       /* plan to use WM_USER to fake kill() with other signals */
+       /* We use WM_USER to fake kill() with other signals */
        case WM_USER: {
+           CALL_FPTR(PL_sighandlerp)(msg.wParam);
            break;
        }
        
@@ -4440,6 +4447,59 @@ Perl_init_os_extras(void)
      */
 }
 
+static PerlInterpreter* win32_process_perl = NULL;
+
+BOOL WINAPI 
+win32_ctrlhandler(DWORD dwCtrlType)
+{
+    dTHX;
+    if (!my_perl) {
+       my_perl = win32_process_perl;
+       if (!my_perl) {
+           return FALSE;
+       }
+       PERL_SET_THX(my_perl);
+    }
+
+    switch(dwCtrlType) {
+    case CTRL_CLOSE_EVENT:
+     /*  A signal that the system sends to all processes attached to a console when 
+         the user closes the console (either by choosing the Close command from the 
+         console window's System menu, or by choosing the End Task command from the 
+         Task List
+      */
+       CALL_FPTR(PL_sighandlerp)(1); /* SIGHUP */
+       return TRUE;    
+
+    case CTRL_C_EVENT:
+       /*  A CTRL+c signal was received */
+       CALL_FPTR(PL_sighandlerp)(2); /* SIGINT */
+       return TRUE;    
+
+    case CTRL_BREAK_EVENT:
+       /*  A CTRL+BREAK signal was received */
+       CALL_FPTR(PL_sighandlerp)(3); /* SIGQUIT */
+       return TRUE;    
+
+    case CTRL_LOGOFF_EVENT:
+      /*  A signal that the system sends to all console processes when a user is logging 
+          off. This signal does not indicate which user is logging off, so no 
+          assumptions can be made. 
+       */
+       break;  
+    case CTRL_SHUTDOWN_EVENT:
+      /*  A signal that the system sends to all console processes when the system is 
+          shutting down. 
+       */
+       break;  
+    default:
+       break;  
+    }
+    return FALSE;
+}
+ 
+
+
 void
 Perl_win32_init(int *argcp, char ***argvp)
 {
@@ -4465,6 +4525,8 @@ win32_get_child_IO(child_IO_table* ptbl)
 
 #ifdef HAVE_INTERP_INTERN
 
+
+
 void
 Perl_sys_intern_init(pTHX)
 {
@@ -4480,6 +4542,13 @@ Perl_sys_intern_init(pTHX)
     w32_num_pseudo_children    = 0;
 #  endif
     w32_init_socktype          = 0;
+    if (!win32_process_perl) {
+       win32_process_perl = my_perl;
+        /* Force C runtime signal stuff to set its console handler */
+       signal(SIGINT,SIG_DFL);
+        /* Push our handler on top */
+       SetConsoleCtrlHandler(win32_ctrlhandler,TRUE);
+    }
 }
 
 void
@@ -4489,6 +4558,10 @@ Perl_sys_intern_clear(pTHX)
     Safefree(w32_perlshell_vec);
     /* NOTE: w32_fdpid is freed by sv_clean_all() */
     Safefree(w32_children);
+    if (my_perl == win32_process_perl) {
+       SetConsoleCtrlHandler(win32_ctrlhandler,FALSE);
+       win32_process_perl = NULL;
+    }
 #  ifdef USE_ITHREADS
     Safefree(w32_pseudo_children);
 #  endif