Load cups into easysw/current.

[thirdparty/cups.git] / backend / runloop.c

diff --git a/backend/runloop.c b/backend/runloop.c
index f613c054021a05f869375a1b3506e098eb855b9e..461bbb4e7248f1efc570aef77ae49695716a3b60 100644 (file)
--- a/backend/runloop.c
+++ b/backend/runloop.c
@@ -1,9 +1,9 @@
 /*
- * "$Id: runloop.c 6145 2006-12-06 20:10:16Z mike $"
+ * "$Id: runloop.c 6170 2007-01-02 17:26:41Z mike $"
  *
  *   Common run loop API for the Common UNIX Printing System (CUPS).
  *
- *   Copyright 2006 by Easy Software Products, all rights reserved.
+ *   Copyright 2006-2007 by Easy Software Products, all rights reserved.
  *
  *   These coded instructions, statements, and computer programs are the
  *   property of Easy Software Products and are protected by Federal
@@ -45,9 +45,11 @@
  */
 
 ssize_t                                        /* O - Total bytes on success, -1 on error */
-backendRunLoop(int print_fd,           /* I - Print file descriptor */
-               int device_fd,          /* I - Device file descriptor */
-              int use_bc)              /* I - Use back-channel? */
+backendRunLoop(
+    int  print_fd,                     /* I - Print file descriptor */
+    int  device_fd,                    /* I - Device file descriptor */
+    int  use_bc,                       /* I - Use back-channel? */
+    void (*side_cb)(int, int, int))    /* I - Side-channel callback */
 {
   int          nfds;                   /* Maximum file descriptor value + 1 */
   fd_set       input,                  /* Input set for reading */
@@ -112,12 +114,14 @@ backendRunLoop(int print_fd,              /* I - Print file descriptor */
       FD_SET(print_fd, &input);
     if (use_bc)
       FD_SET(device_fd, &input);
+    if (side_cb)
+      FD_SET(CUPS_SC_FD, &input);
 
     FD_ZERO(&output);
     if (print_bytes || !use_bc)
       FD_SET(device_fd, &output);
 
-    if (use_bc)
+    if (use_bc || side_cb)
     {
       if (select(nfds, &input, &output, NULL, NULL) < 0)
       {
@@ -137,6 +141,13 @@ backendRunLoop(int print_fd,               /* I - Print file descriptor */
       }
     }
 
+   /*
+    * Check if we have a side-channel request ready...
+    */
+
+    if (side_cb && FD_ISSET(CUPS_SC_FD, &input))
+      (*side_cb)(print_fd, device_fd, use_bc);
+
    /*
     * Check if we have back-channel data ready...
     */
@@ -258,5 +269,5 @@ backendRunLoop(int print_fd,                /* I - Print file descriptor */
 
 
 /*
- * End of "$Id: runloop.c 6145 2006-12-06 20:10:16Z mike $".
+ * End of "$Id: runloop.c 6170 2007-01-02 17:26:41Z mike $".
  */