winsup/cygwin/local_includes/cygwait.h

   1 /* cygwait.h
   2
   3    This file is part of Cygwin.
   4
   5    This software is a copyrighted work licensed under the terms of the
   6    Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7    details.  */
   8
   9 #pragma once
  10
  11 #define WAIT_CANCELED   (WAIT_OBJECT_0 + 2)
  12 #define WAIT_SIGNALED  (WAIT_OBJECT_0 + 1)
  13
  14 enum cw_wait_mask
  15 {
  16   cw_cancel =           0x0001, /* Cancellation point.  Return to caller. */
  17   cw_cancel_self =      0x0002, /* Cancellation point.  Cancel self. */
  18   cw_sig =              0x0004, /* Handle signals. */
  19   cw_sig_eintr =        0x0008, /* Caller handles signals. */
  20   cw_sig_cont =         0x0010, /* Caller handles SIGCONT. */
  21   cw_sig_restart =      0x0020  /* Restart even if SA_RESTART isn't set. */
  22 };
  23
  24 extern LARGE_INTEGER cw_nowait_storage;
  25 #define cw_nowait (&cw_nowait_storage)
  26 #define cw_infinite ((PLARGE_INTEGER) NULL)
  27
  28 const unsigned cw_std_mask = cw_cancel | cw_cancel_self | cw_sig;
  29
  30 DWORD cygwait (HANDLE, PLARGE_INTEGER timeout,
  31                        unsigned = cw_std_mask);
  32
  33 extern inline DWORD __attribute__ ((always_inline))
  34 cygwait (HANDLE h, DWORD howlong, unsigned mask)
  35 {
  36   LARGE_INTEGER li_howlong;
  37   PLARGE_INTEGER pli_howlong;
  38   if (howlong == INFINITE)
  39     pli_howlong = NULL;
  40   else
  41     {
  42       li_howlong.QuadPart = -(10000ULL * howlong);
  43       pli_howlong = &li_howlong;
  44     }
  45   return cygwait (h, pli_howlong, mask);
  46 }
  47
  48 static inline DWORD __attribute__ ((always_inline))
  49 cygwait (HANDLE h, DWORD howlong = INFINITE)
  50 {
  51   return cygwait (h, howlong, cw_cancel | cw_sig);
  52 }
  53
  54 static inline DWORD __attribute__ ((always_inline))
  55 cygwait (DWORD howlong)
  56 {
  57   return cygwait (NULL, howlong);
  58 }